"""Find chart XML that PowerPoint refuses but the schema accepts.

Detection only: for either fault more than one repair is valid, and only the
author knows which was meant.
"""


from __future__ import annotations

import re
from typing import Mapping

from . import part_text


_CHART_PART_RE = re.compile(r"ppt/charts/chart\d+\.xml")

_GROUPING_RE = re.compile(r"""<c:grouping\b[^>]*?\bval=["'](\w+)["']""")
_DLBL_POS_RE = re.compile(r"""<c:dLblPos\b[^>]*?\bval=["'](\w+)["']""")

def _strip_ext_lst(text: str) -> str:
    out, cursor = [], 0
    for lo, hi in _ext_lst_spans(text):
        out.append(text[cursor:lo])
        cursor = hi
    out.append(text[cursor:])
    return "".join(out)

_BAR_GROUP_RE = re.compile(r"<c:(bar3DChart|barChart)\b[^>]*(?<!/)>.*?</c:\1\s*>", re.DOTALL)

STACKED_GROUPINGS = frozenset({"stacked", "percentStacked"})
ILLEGAL_ON_STACKED = frozenset({"outEnd"})
LEGAL_ON_STACKED = ("ctr", "inEnd", "inBase")


def _check_stacked_label_positions(part: str, xml: str) -> list[str]:
    problems: list[str] = []
    for match in _BAR_GROUP_RE.finditer(xml):
        block = _strip_ext_lst(match.group(0))
        group = match.group(1)

        grouping = _GROUPING_RE.search(block)
        if grouping is None or grouping.group(1) not in STACKED_GROUPINGS:
            continue

        bad = [p for p in _DLBL_POS_RE.findall(block) if p in ILLEGAL_ON_STACKED]
        for pos in sorted(set(bad)):
            problems.append(
                f'{part}: {bad.count(pos)} data label(s) use dLblPos="{pos}" on a '
                f"{grouping.group(1)} {group}; PowerPoint allows only "
                f"{', '.join(LEGAL_ON_STACKED)} there"
            )
    return problems



_ANY_CHART_GROUP_RE = re.compile(r"<c:(\w+Chart)\b[^>]*(?<!/)>.*?</c:\1\s*>", re.DOTALL)

_AXID_RE = re.compile(
    r"""\s*<c:axId\b[^>]*?\bval=["'](-?\d+)["']\s*(?:/>|>\s*</c:axId\s*>)"""
)

_AXIS_DECL_RE = re.compile(
    r"""<c:(catAx|valAx|serAx|dateAx)\b[^>]*(?<!/)>\s*<c:axId\b[^>]*?\bval=["'](-?\d+)["']"""
)

AXID_LIMIT = {
    "barChart": 2, "lineChart": 2, "areaChart": 2, "scatterChart": 2,
    "bubbleChart": 2, "radarChart": 2, "stockChart": 2,
    "bar3DChart": 3, "line3DChart": 3, "area3DChart": 3,
    "surfaceChart": 3, "surface3DChart": 3,
}

AXID_MINIMUM = {
    "barChart": 2, "lineChart": 2, "areaChart": 2, "scatterChart": 2,
    "bubbleChart": 2, "radarChart": 2, "stockChart": 2,
    "bar3DChart": 2, "area3DChart": 2, "surfaceChart": 2,
    "line3DChart": 3, "surface3DChart": 3,
}


def _declared_axes(xml: str) -> dict[str, list[str]]:
    axes: dict[str, list[str]] = {}
    for kind, axid in _AXIS_DECL_RE.findall(xml):
        axes.setdefault(kind, []).append(axid)
    return axes


def _canonical_ids(axes: dict[str, list[str]], limit: int) -> list[str] | None:
    category = axes.get("catAx", []) + axes.get("dateAx", [])
    value = axes.get("valAx", [])
    series = axes.get("serAx", [])
    if len(category) != 1 or len(value) != 1 or len(series) > 1:
        return None
    ids = [category[0], value[0]]
    if limit >= 3 and series:
        ids.append(series[0])
    return ids


def _undeclared_axes(kind: str, block: str, axes: dict[str, list[str]]) -> list[str] | None:
    if kind not in AXID_LIMIT:
        return None
    ids = _AXID_RE.findall(block)
    declared = {i for group in axes.values() for i in group}
    if len([i for i in ids if i in declared]) >= 2:
        return None
    return ids


def _check_chart_axis_references(part: str, xml: str) -> list[str]:
    axes = _declared_axes(xml)
    problems: list[str] = []
    declared = {i for group in axes.values() for i in group}
    for match in _ANY_CHART_GROUP_RE.finditer(xml):
        kind, block = match.group(1), match.group(0)
        ids = _undeclared_axes(kind, block, axes)
        if ids is None:
            continue
        if not ids:
            problems.append(
                f"{part}: <c:{kind}> declares no <c:axId> this part can resolve; a chart "
                f"group needs {AXID_MINIMUM[kind]}, and PowerPoint discards one with fewer"
            )
            continue
        dead = [i for i in ids if i not in declared]
        canonical = _canonical_ids(axes, AXID_LIMIT[kind])
        if canonical is not None and len(canonical) >= AXID_MINIMUM[kind]:
            hint = f"Fix: point them at the axes this part declares ({', '.join(canonical)})"
        else:
            hint = ("Fix: the part declares several axes of a kind -- declare the "
                    "secondary axes the series expects, or drop them")
        detail = (f"of which {', '.join(dead)} name no declared axis"
                  if dead else f"only {len(ids)} of which this part declares")
        problems.append(
            f"{part}: <c:{kind}> references axId {', '.join(ids)}, {detail}, "
            f"leaving fewer than two live axes; PowerPoint discards the chart. {hint}"
        )
    return problems


def _ext_lst_spans(text: str) -> list[tuple[int, int]]:
    spans: list[tuple[int, int]] = []
    depth = 0
    start = 0
    for match in re.finditer(r"<(/?)c:extLst\b[^>]*?(/?)>", text):
        closing, self_closing = match.group(1), match.group(2)
        if self_closing:
            continue
        if closing:
            depth -= 1
            if depth == 0:
                spans.append((start, match.end()))
        else:
            if depth == 0:
                start = match.start()
            depth += 1
    return spans


CHART_CHECKS = (_check_stacked_label_positions, _check_chart_axis_references)


def find_chart_problems(files: Mapping[str, bytes]) -> list[str]:
    problems: list[str] = []
    for part in sorted(n for n in files if _CHART_PART_RE.fullmatch(n)):
        xml = part_text(files[part])
        for check in CHART_CHECKS:
            problems.extend(check(part, xml))
    return problems

"""Pick the slide-XML schema errors PowerPoint refuses the file over.

A denylist over lxml's messages, so an unrecognised error class is a miss rather
than a false alarm.
"""


from __future__ import annotations

import re

SLIDE_PART_RE = re.compile(
    r"ppt/(slides|slideLayouts|slideMasters|notesSlides|notesMasters|handoutMasters)"
    r"/[^/]+\.xml"
)

FATAL_SLIDE_ERRORS: tuple[tuple[re.Pattern[str], str], ...] = (
    (
        re.compile(r"\}tableStyleId': This element is not expected"),
        "two <a:tableStyleId> in one <a:tblPr> (the schema allows one)",
    ),
    (
        re.compile(r"\}srgbClr', attribute 'val'"),
        "a colour that is not six hex digits",
    ),
    (
        re.compile(r"\}txBody': Missing child element"),
        "a <p:txBody> with no children",
    ),
    (
        re.compile(r"\}miter', attribute 'lim'"),
        'a line join with lim="NaN"',
    ),
    (
        re.compile(r"\}uLnTx': This element is not expected"),
        "<a:uLnTx> in a position the schema forbids",
    ),
    (
        re.compile(r"\}overrideClrMapping': This element is not expected"),
        "<p:overrideClrMapping> in a position the schema forbids",
    ),
    (
        re.compile(r"\}nvGrpSpPr': Missing child element"),
        "a <p:nvGrpSpPr> with no children",
    ),
)


def is_schema_verdict(error: str) -> bool:
    return error.startswith("Element ")


def fatal_slide_errors(errors: set[str]) -> list[str]:
    out = []
    for error in sorted(errors):
        for pattern, meaning in FATAL_SLIDE_ERRORS:
            if pattern.search(error):
                out.append(f"{meaning}: {error}")
                break
    return out

"""Find masters sharing a theme part in the way PowerPoint refuses to open.

Reports only; the fix is to move <p:notesMasterIdLst> back to directly after
<p:sldIdLst> in ppt/presentation.xml.
"""


from __future__ import annotations

import posixpath
import re
from typing import Mapping

from . import part_text

THEME_REL_TYPE = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/theme"

_MASTER_RE = re.compile(
    r"^ppt/(?P<group>slideMasters|notesMasters|handoutMasters)/"
    r"(?:slide|notes|handout)Master(?P<num>\d+)\.xml$"
)
_GROUP_ORDER = {"slideMasters": 0, "notesMasters": 1, "handoutMasters": 2}

_RELATIONSHIP_RE = re.compile(
    r"<Relationship\b[^>]*?(?:/>|>.*?</Relationship\s*>)", re.DOTALL
)


def _sort_key(name: str) -> tuple[int, int]:
    m = _MASTER_RE.match(name)
    assert m is not None
    return (_GROUP_ORDER[m.group("group")], int(m.group("num")))


def _rels_path(part: str) -> str:
    directory, base = posixpath.split(part)
    return f"{directory}/_rels/{base}.rels"


def _resolve(rels_path: str, target: str) -> str:
    if target.startswith("/"):
        return target.lstrip("/")
    part_dir = posixpath.dirname(posixpath.dirname(rels_path))
    return posixpath.normpath(posixpath.join(part_dir, target))


def _theme_rel(files: Mapping[str, bytes], master: str):
    rels_path = _rels_path(master)
    rels = files.get(rels_path)
    if rels is None:
        return None
    for element in _RELATIONSHIP_RE.findall(part_text(rels)):
        if f'Type="{THEME_REL_TYPE}"' not in element:
            continue
        target = re.search(r'\bTarget="([^"]+)"', element)
        if target is None:
            continue
        return rels_path, element, _resolve(rels_path, target.group(1))
    return None


def _masters(files: Mapping[str, bytes]) -> list[str]:
    return sorted((n for n in files if _MASTER_RE.match(n)), key=_sort_key)


_PRESENTATION = "ppt/presentation.xml"
_NOTES_MASTERS = "ppt/notesMasters/"
_IGNORABLE_RE = re.compile(r"<!--.*?-->|<\?.*?\?>", re.DOTALL)
_AFTER_SLDIDLST_RE = re.compile(
    r"<p:sldIdLst\b(?:[^>]*/>|[^>]*>.*?</p:sldIdLst\s*>)\s*(<[^>\s/]+)", re.DOTALL
)


def _notes_master_share_is_inert(files: Mapping[str, bytes]) -> bool:
    data = files.get(_PRESENTATION)
    if data is None:
        return False
    match = _AFTER_SLDIDLST_RE.search(_IGNORABLE_RE.sub("", part_text(data)))
    return match is not None and match.group(1) == "<p:notesMasterIdLst"


def _shares(files: Mapping[str, bytes]):
    owner: dict[str, str] = {}
    for master in _masters(files):
        found = _theme_rel(files, master)
        if found is None:
            continue
        rels_path, element, theme = found
        if theme not in files:
            continue  
        if theme in owner:
            yield master, rels_path, element, theme, owner[theme]
        else:
            owner[theme] = master


def _is_inert(master: str, inert_notes: bool) -> bool:
    return inert_notes and master.startswith(_NOTES_MASTERS)


def find_shared_master_themes(files: Mapping[str, bytes]) -> list[str]:
    return [
        f"{master} shares {theme} with {first}"
        for master, _, _, theme, first in _shares(files)
    ]


def live_shared_master_themes(files: Mapping[str, bytes]) -> list[str]:
    inert_notes = _notes_master_share_is_inert(files)
    return [
        f"{master} shares {theme} with {first}"
        for master, _, _, theme, first in _shares(files)
        if not _is_inert(master, inert_notes)
    ]

import os
import posixpath
import re
import stat
import tempfile
import urllib.parse
import zipfile
from pathlib import Path

OOXML_FAMILY = {
    ".docx": "docx",
    ".dotx": "docx",
    ".pptx": "pptx",
    ".potx": "pptx",
    ".xlsx": "xlsx",
    ".xltx": "xlsx",
}

_SCHEME_RE = re.compile(r"^[A-Za-z][A-Za-z0-9+.\-]*:")

SLIDE_REL_TYPE = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide"


def opc_target(target: str, source_part: str, target_mode: str = "") -> str | None:
    if not target:
        return None
    if target_mode.lower() == "external":
        return None
    if _SCHEME_RE.match(target):
        return None

    target = urllib.parse.unquote(target)

    if "\\" in target:
        raise ValueError(f"relationship target is not a POSIX part name: {target!r}")

    if target.startswith("/"):
        joined = target.lstrip("/")
    else:
        joined = posixpath.join(posixpath.dirname(source_part), target)

    parts: list[str] = []
    for segment in posixpath.normpath(joined).split("/"):
        if segment in ("", "."):
            continue
        if segment == "..":
            if not parts:
                raise ValueError(f"relationship target escapes the package: {target!r}")
            parts.pop()
        else:
            parts.append(segment)

    if not parts:
        raise ValueError(f"relationship target resolves to nothing: {target!r}")
    return "/".join(parts)


def rels_source_part(rels_file: Path, unpacked_dir: Path) -> str:
    owner_dir = rels_file.parent.parent.relative_to(unpacked_dir)
    return posixpath.join(owner_dir.as_posix(), rels_file.name[: -len(".rels")]).lstrip("./")


def part_text(data: bytes) -> str:
    return data.decode("utf-8", "surrogateescape")


XML_SPACE = " \t\r\n"


def rendered_text(text: str, preserve: bool) -> str:
    return text if preserve else text.strip(XML_SPACE)


def safe_extract(zf: zipfile.ZipFile, dest: Path) -> None:
    dest = dest.resolve()
    for m in zf.infolist():
        if stat.S_ISLNK(m.external_attr >> 16):
            raise ValueError(f"symlink archive entry not allowed: {m.filename!r}")
        target = (dest / m.filename).resolve()
        if not target.is_relative_to(dest):
            raise ValueError(f"unsafe archive entry: {m.filename!r}")
        zf.extract(m, dest)


def rezip(src_dir: Path, out_path: Path) -> None:
    files = sorted(p for p in src_dir.rglob("*") if p.is_file())
    ct = src_dir / "[Content_Types].xml"
    fd, tmp_name = tempfile.mkstemp(
        prefix=out_path.name + ".", suffix=".tmp", dir=out_path.parent
    )
    tmp_out = Path(tmp_name)
    try:
        with os.fdopen(fd, "wb") as fh:
            with zipfile.ZipFile(fh, "w", zipfile.ZIP_DEFLATED) as zf:
                if ct.exists():
                    zf.write(ct, ct.relative_to(src_dir), compress_type=zipfile.ZIP_STORED)
                for f in files:
                    if f == ct:
                        continue
                    zf.write(f, f.relative_to(src_dir))
        if out_path.exists():
            mode = out_path.stat().st_mode & 0o777
        else:
            umask = os.umask(0)
            os.umask(umask)
            mode = 0o666 & ~umask
        os.chmod(tmp_out, mode)
        os.replace(tmp_out, out_path)
    finally:
        if tmp_out.exists():
            tmp_out.unlink()

"""
Base validator with common validation logic for document files.
"""

import re
from pathlib import Path

import defusedxml.minidom
from functools import lru_cache

import lxml.etree

from helpers import safe_extract


@lru_cache(maxsize=None)
def _load_schema(schema_path: str):
    with open(schema_path, "rb") as xsd_file:
        xsd_doc = lxml.etree.parse(
            xsd_file, parser=lxml.etree.XMLParser(), base_url=schema_path
        )
    return lxml.etree.XMLSchema(xsd_doc)

class BaseSchemaValidator:

    IGNORED_VALIDATION_ERRORS = [
        "hyphenationZone",
        "purl.org/dc/terms",
    ]

    UNIQUE_ID_REQUIREMENTS = {
        "comment": ("id", "file"),  
        "commentrangestart": ("id", "file"),  
        "commentrangeend": ("id", "file"),  
        "bookmarkstart": ("id", "file"),  
        "bookmarkend": ("id", "file"),  
        "sldid": ("id", "file"),  
        "sldmasterid": ("id", "global"),  
        "sldlayoutid": ("id", "global"),  
        "cm": ("authorid", "file"),  
        "sheet": ("sheetid", "file"),  
        "definedname": ("id", "file"),  
        "cxnsp": ("id", "file"),  
        "sp": ("id", "file"),  
        "pic": ("id", "file"),  
        "grpsp": ("id", "file"),  
    }

    EXCLUDED_ID_CONTAINERS = {
        "sectionlst",  
    }

    ELEMENT_RELATIONSHIP_TYPES = {}

    SCHEMA_MAPPINGS = {
        "word": "ISO-IEC29500-4_2016/wml.xsd",  
        "ppt": "ISO-IEC29500-4_2016/pml.xsd",  
        "xl": "ISO-IEC29500-4_2016/sml.xsd",  
        "[Content_Types].xml": "ecma/fouth-edition/opc-contentTypes.xsd",
        "app.xml": "ISO-IEC29500-4_2016/shared-documentPropertiesExtended.xsd",
        "core.xml": "ecma/fouth-edition/opc-coreProperties.xsd",
        "custom.xml": "ISO-IEC29500-4_2016/shared-documentPropertiesCustom.xsd",
        ".rels": "ecma/fouth-edition/opc-relationships.xsd",
        "people.xml": "microsoft/wml-2012.xsd",
        "commentsIds.xml": "microsoft/wml-cid-2016.xsd",
        "commentsExtensible.xml": "microsoft/wml-cex-2018.xsd",
        "commentsExtended.xml": "microsoft/wml-2012.xsd",
        "chart": "ISO-IEC29500-4_2016/dml-chart.xsd",
        "theme": "ISO-IEC29500-4_2016/dml-main.xsd",
        "drawing": "ISO-IEC29500-4_2016/dml-main.xsd",
    }

    MC_NAMESPACE = "http://schemas.openxmlformats.org/markup-compatibility/2006"
    XML_NAMESPACE = "http://www.w3.org/XML/1998/namespace"

    PACKAGE_RELATIONSHIPS_NAMESPACE = (
        "http://schemas.openxmlformats.org/package/2006/relationships"
    )
    OFFICE_RELATIONSHIPS_NAMESPACE = (
        "http://schemas.openxmlformats.org/officeDocument/2006/relationships"
    )
    CONTENT_TYPES_NAMESPACE = (
        "http://schemas.openxmlformats.org/package/2006/content-types"
    )

    MAIN_CONTENT_FOLDERS = {"word", "ppt", "xl"}

    OOXML_NAMESPACES = {
        "http://schemas.openxmlformats.org/officeDocument/2006/math",
        "http://schemas.openxmlformats.org/officeDocument/2006/relationships",
        "http://schemas.openxmlformats.org/schemaLibrary/2006/main",
        "http://schemas.openxmlformats.org/drawingml/2006/main",
        "http://schemas.openxmlformats.org/drawingml/2006/chart",
        "http://schemas.openxmlformats.org/drawingml/2006/chartDrawing",
        "http://schemas.openxmlformats.org/drawingml/2006/diagram",
        "http://schemas.openxmlformats.org/drawingml/2006/picture",
        "http://schemas.openxmlformats.org/drawingml/2006/spreadsheetDrawing",
        "http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing",
        "http://schemas.openxmlformats.org/wordprocessingml/2006/main",
        "http://schemas.openxmlformats.org/presentationml/2006/main",
        "http://schemas.openxmlformats.org/spreadsheetml/2006/main",
        "http://schemas.openxmlformats.org/officeDocument/2006/sharedTypes",
        "http://www.w3.org/XML/1998/namespace",
    }

    def __init__(self, unpacked_dir, original_file=None, verbose=False):
        self.unpacked_dir = Path(unpacked_dir).resolve()
        self.original_file = Path(original_file) if original_file else None
        self.verbose = verbose

        self.schemas_dir = Path(__file__).parent.parent / "schemas"

        patterns = ["*.xml", "*.rels"]
        self.xml_files = [
            f for pattern in patterns for f in self.unpacked_dir.rglob(pattern)
        ]

        if not self.xml_files:
            print(f"Warning: No XML files found in {self.unpacked_dir}")

    def validate(self):
        raise NotImplementedError("Subclasses must implement the validate method")

    def repair(self) -> int:
        return self.repair_whitespace_preservation()

    def repair_whitespace_preservation(self) -> int:
        repairs = 0

        for xml_file in self.xml_files:
            try:
                content = xml_file.read_text(encoding="utf-8")
                dom = defusedxml.minidom.parseString(content)
                pending = []  

                for elem in dom.getElementsByTagName("*"):
                    local_name = elem.tagName.rsplit(":", 1)[-1]
                    if local_name in ("t", "delText", "instrText", "delInstrText"):
                        text = "".join(
                            child.data
                            for child in elem.childNodes
                            if child.nodeType in (child.TEXT_NODE, child.CDATA_SECTION_NODE)
                        )
                        ws = (" ", "\t", "\n", "\r")
                        if text and (text.startswith(ws) or text.endswith(ws)):
                            if elem.getAttribute("xml:space") != "preserve":
                                elem.setAttribute("xml:space", "preserve")
                                text_preview = repr(text[:30]) + "..." if len(text) > 30 else repr(text)
                                pending.append(f"  Repaired: {xml_file.name}: Added xml:space='preserve' to {elem.tagName}: {text_preview}")

                if pending:
                    xml_file.write_bytes(dom.toxml(encoding="UTF-8"))
                    for message in pending:
                        print(message)
                    repairs += len(pending)

            except Exception:
                pass

        return repairs

    def validate_xml(self):
        errors = []

        for xml_file in self.xml_files:
            try:
                lxml.etree.parse(str(xml_file))
            except lxml.etree.XMLSyntaxError as e:
                errors.append(
                    f"  {xml_file.relative_to(self.unpacked_dir)}: "
                    f"Line {e.lineno}: {e.msg}"
                )
            except Exception as e:
                errors.append(
                    f"  {xml_file.relative_to(self.unpacked_dir)}: "
                    f"Unexpected error: {str(e)}"
                )

        if errors:
            print(f"FAILED - Found {len(errors)} XML violations:")
            for error in errors:
                print(error)
            return False
        else:
            if self.verbose:
                print("PASSED - All XML files are well-formed")
            return True

    def validate_namespaces(self):
        errors = []

        for xml_file in self.xml_files:
            try:
                root = lxml.etree.parse(str(xml_file)).getroot()
                declared = set(root.nsmap.keys()) - {None}  

                for attr_val in [
                    v for k, v in root.attrib.items() if k.endswith("Ignorable")
                ]:
                    undeclared = set(attr_val.split()) - declared
                    errors.extend(
                        f"  {xml_file.relative_to(self.unpacked_dir)}: "
                        f"Namespace '{ns}' in Ignorable but not declared"
                        for ns in undeclared
                    )
            except lxml.etree.XMLSyntaxError:
                continue

        if errors:
            print(f"FAILED - {len(errors)} namespace issues:")
            for error in errors:
                print(error)
            return False
        if self.verbose:
            print("PASSED - All namespace prefixes properly declared")
        return True

    def validate_unique_ids(self):
        errors = []
        global_ids = {}  

        for xml_file in self.xml_files:
            try:
                root = lxml.etree.parse(str(xml_file)).getroot()
                file_ids = {}  

                mc_elements = root.xpath(
                    ".//mc:AlternateContent", namespaces={"mc": self.MC_NAMESPACE}
                )
                for elem in mc_elements:
                    elem.getparent().remove(elem)

                for elem in root.iter():
                    if not hasattr(elem, "tag") or callable(elem.tag):
                        continue
                    tag = (
                        elem.tag.split("}")[-1].lower()
                        if "}" in elem.tag
                        else elem.tag.lower()
                    )

                    if tag in self.UNIQUE_ID_REQUIREMENTS:
                        in_excluded_container = any(
                            ancestor.tag.split("}")[-1].lower() in self.EXCLUDED_ID_CONTAINERS
                            for ancestor in elem.iterancestors()
                        )
                        if in_excluded_container:
                            continue

                        attr_name, scope = self.UNIQUE_ID_REQUIREMENTS[tag]

                        id_value = None
                        for attr, value in elem.attrib.items():
                            attr_local = (
                                attr.split("}")[-1].lower()
                                if "}" in attr
                                else attr.lower()
                            )
                            if attr_local == attr_name:
                                id_value = value
                                break

                        if id_value is not None:
                            if scope == "global":
                                if id_value in global_ids:
                                    prev_file, prev_line, prev_tag = global_ids[
                                        id_value
                                    ]
                                    errors.append(
                                        f"  {xml_file.relative_to(self.unpacked_dir)}: "
                                        f"Line {elem.sourceline}: Global ID '{id_value}' in <{tag}> "
                                        f"already used in {prev_file} at line {prev_line} in <{prev_tag}>"
                                    )
                                else:
                                    global_ids[id_value] = (
                                        xml_file.relative_to(self.unpacked_dir),
                                        elem.sourceline,
                                        tag,
                                    )
                            elif scope == "file":
                                key = (tag, attr_name)
                                if key not in file_ids:
                                    file_ids[key] = {}

                                if id_value in file_ids[key]:
                                    prev_line = file_ids[key][id_value]
                                    errors.append(
                                        f"  {xml_file.relative_to(self.unpacked_dir)}: "
                                        f"Line {elem.sourceline}: Duplicate {attr_name}='{id_value}' in <{tag}> "
                                        f"(first occurrence at line {prev_line})"
                                    )
                                else:
                                    file_ids[key][id_value] = elem.sourceline

            except (lxml.etree.XMLSyntaxError, Exception) as e:
                errors.append(
                    f"  {xml_file.relative_to(self.unpacked_dir)}: Error: {e}"
                )

        if errors:
            print(f"FAILED - Found {len(errors)} ID uniqueness violations:")
            for error in errors:
                print(error)
            return False
        else:
            if self.verbose:
                print("PASSED - All required IDs are unique")
            return True

    def validate_file_references(self):
        errors = []

        rels_files = list(self.unpacked_dir.rglob("*.rels"))

        if not rels_files:
            if self.verbose:
                print("PASSED - No .rels files found")
            return True

        all_files = []
        for file_path in self.unpacked_dir.rglob("*"):
            if (
                file_path.is_file()
                and file_path.name != "[Content_Types].xml"
                and not file_path.name.endswith(".rels")
            ):  
                all_files.append(file_path.resolve())

        all_referenced_files = set()

        if self.verbose:
            print(
                f"Found {len(rels_files)} .rels files and {len(all_files)} target files"
            )

        for rels_file in rels_files:
            try:
                rels_root = lxml.etree.parse(str(rels_file)).getroot()

                rels_dir = rels_file.parent

                referenced_files = set()
                broken_refs = []

                for rel in rels_root.findall(
                    ".//ns:Relationship",
                    namespaces={"ns": self.PACKAGE_RELATIONSHIPS_NAMESPACE},
                ):
                    target = rel.get("Target")
                    if rel.get("TargetMode") == "External":
                        continue
                    if target and not target.startswith(
                        ("http", "mailto:")
                    ):  
                        if target.startswith("/"):
                            target_path = self.unpacked_dir / target.lstrip("/")
                        elif rels_file.name == ".rels":
                            target_path = self.unpacked_dir / target
                        else:
                            base_dir = rels_dir.parent
                            target_path = base_dir / target

                        try:
                            target_path = target_path.resolve()
                            if target_path.exists() and target_path.is_file():
                                referenced_files.add(target_path)
                                all_referenced_files.add(target_path)
                            else:
                                broken_refs.append((target, rel.sourceline))
                        except (OSError, ValueError):
                            broken_refs.append((target, rel.sourceline))

                if broken_refs:
                    rel_path = rels_file.relative_to(self.unpacked_dir)
                    for broken_ref, line_num in broken_refs:
                        errors.append(
                            f"  {rel_path}: Line {line_num}: Broken reference to {broken_ref}"
                        )

            except Exception as e:
                rel_path = rels_file.relative_to(self.unpacked_dir)
                errors.append(f"  Error parsing {rel_path}: {e}")

        unreferenced_files = set(all_files) - all_referenced_files

        if unreferenced_files:
            for unref_file in sorted(unreferenced_files):
                unref_rel_path = unref_file.relative_to(self.unpacked_dir)
                errors.append(f"  Unreferenced file: {unref_rel_path}")

        if errors:
            print(f"FAILED - Found {len(errors)} relationship validation errors:")
            for error in errors:
                print(error)
            print(
                "CRITICAL: These errors will cause the document to appear corrupt. "
                + "Broken references MUST be fixed, "
                + "and unreferenced files MUST be referenced or removed."
            )
            return False
        else:
            if self.verbose:
                print(
                    "PASSED - All references are valid and all files are properly referenced"
                )
            return True

    def validate_all_relationship_ids(self):
        import lxml.etree

        errors = []

        for xml_file in self.xml_files:
            if xml_file.suffix == ".rels":
                continue

            rels_dir = xml_file.parent / "_rels"
            rels_file = rels_dir / f"{xml_file.name}.rels"

            if not rels_file.exists():
                continue

            try:
                rels_root = lxml.etree.parse(str(rels_file)).getroot()
                rid_to_type = {}

                for rel in rels_root.findall(
                    f".//{{{self.PACKAGE_RELATIONSHIPS_NAMESPACE}}}Relationship"
                ):
                    rid = rel.get("Id")
                    rel_type = rel.get("Type", "")
                    if rid:
                        if rid in rid_to_type:
                            rels_rel_path = rels_file.relative_to(self.unpacked_dir)
                            errors.append(
                                f"  {rels_rel_path}: Line {rel.sourceline}: "
                                f"Duplicate relationship ID '{rid}' (IDs must be unique)"
                            )
                        type_name = (
                            rel_type.split("/")[-1] if "/" in rel_type else rel_type
                        )
                        rid_to_type[rid] = type_name

                xml_root = lxml.etree.parse(str(xml_file)).getroot()

                r_ns = self.OFFICE_RELATIONSHIPS_NAMESPACE
                rid_attrs_to_check = ["id", "embed", "link"]
                for elem in xml_root.iter():
                    if not hasattr(elem, "tag") or callable(elem.tag):
                        continue
                    for attr_name in rid_attrs_to_check:
                        rid_attr = elem.get(f"{{{r_ns}}}{attr_name}")
                        if not rid_attr:
                            continue
                        xml_rel_path = xml_file.relative_to(self.unpacked_dir)
                        elem_name = (
                            elem.tag.split("}")[-1] if "}" in elem.tag else elem.tag
                        )

                        if rid_attr not in rid_to_type:
                            errors.append(
                                f"  {xml_rel_path}: Line {elem.sourceline}: "
                                f"<{elem_name}> r:{attr_name} references non-existent relationship '{rid_attr}' "
                                f"(valid IDs: {', '.join(sorted(rid_to_type.keys())[:5])}{'...' if len(rid_to_type) > 5 else ''})"
                            )
                        elif attr_name == "id" and self.ELEMENT_RELATIONSHIP_TYPES:
                            expected_type = self._get_expected_relationship_type(
                                elem_name
                            )
                            if expected_type:
                                actual_type = rid_to_type[rid_attr]
                                if expected_type not in actual_type.lower():
                                    errors.append(
                                        f"  {xml_rel_path}: Line {elem.sourceline}: "
                                        f"<{elem_name}> references '{rid_attr}' which points to '{actual_type}' "
                                        f"but should point to a '{expected_type}' relationship"
                                    )

            except Exception as e:
                xml_rel_path = xml_file.relative_to(self.unpacked_dir)
                errors.append(f"  Error processing {xml_rel_path}: {e}")

        if errors:
            print(f"FAILED - Found {len(errors)} relationship ID reference errors:")
            for error in errors:
                print(error)
            print("\nThese ID mismatches will cause the document to appear corrupt!")
            return False
        else:
            if self.verbose:
                print("PASSED - All relationship ID references are valid")
            return True

    def _get_expected_relationship_type(self, element_name):
        elem_lower = element_name.lower()

        if elem_lower in self.ELEMENT_RELATIONSHIP_TYPES:
            return self.ELEMENT_RELATIONSHIP_TYPES[elem_lower]

        if elem_lower.endswith("id") and len(elem_lower) > 2:
            prefix = elem_lower[:-2]  
            if prefix.endswith("master"):
                return prefix.lower()
            elif prefix.endswith("layout"):
                return prefix.lower()
            else:
                if prefix == "sld":
                    return "slide"
                return prefix.lower()

        if elem_lower.endswith("reference") and len(elem_lower) > 9:
            prefix = elem_lower[:-9]  
            return prefix.lower()

        return None

    def validate_content_types(self):
        errors = []

        content_types_file = self.unpacked_dir / "[Content_Types].xml"
        if not content_types_file.exists():
            print("FAILED - [Content_Types].xml file not found")
            return False

        try:
            root = lxml.etree.parse(str(content_types_file)).getroot()
            declared_parts = set()
            declared_extensions = set()

            for override in root.findall(
                f".//{{{self.CONTENT_TYPES_NAMESPACE}}}Override"
            ):
                part_name = override.get("PartName")
                if part_name is not None:
                    declared_parts.add(part_name.lstrip("/"))

            for default in root.findall(
                f".//{{{self.CONTENT_TYPES_NAMESPACE}}}Default"
            ):
                extension = default.get("Extension")
                if extension is not None:
                    declared_extensions.add(extension.lower())

            declarable_roots = {
                "sld",
                "sldLayout",
                "sldMaster",
                "presentation",  
                "document",  
                "workbook",
                "worksheet",  
                "theme",  
            }

            media_extensions = {
                "png": "image/png",
                "jpg": "image/jpeg",
                "jpeg": "image/jpeg",
                "gif": "image/gif",
                "bmp": "image/bmp",
                "tiff": "image/tiff",
                "wmf": "image/x-wmf",
                "emf": "image/x-emf",
            }

            all_files = list(self.unpacked_dir.rglob("*"))
            all_files = [f for f in all_files if f.is_file()]

            for xml_file in self.xml_files:
                path_str = str(xml_file.relative_to(self.unpacked_dir)).replace(
                    "\\", "/"
                )

                if any(
                    skip in path_str
                    for skip in [".rels", "[Content_Types]", "docProps/", "_rels/"]
                ):
                    continue

                try:
                    root_tag = lxml.etree.parse(str(xml_file)).getroot().tag
                    root_name = root_tag.split("}")[-1] if "}" in root_tag else root_tag

                    if root_name in declarable_roots and path_str not in declared_parts:
                        errors.append(
                            f"  {path_str}: File with <{root_name}> root not declared in [Content_Types].xml"
                        )

                except Exception:
                    continue  

            for file_path in all_files:
                if file_path.suffix.lower() in {".xml", ".rels"}:
                    continue
                if file_path.name == "[Content_Types].xml":
                    continue
                if "_rels" in file_path.parts or "docProps" in file_path.parts:
                    continue

                extension = file_path.suffix.lstrip(".").lower()
                if extension and extension not in declared_extensions:
                    if extension in media_extensions:
                        relative_path = file_path.relative_to(self.unpacked_dir)
                        errors.append(
                            f'  {relative_path}: File with extension \'{extension}\' not declared in [Content_Types].xml - should add: <Default Extension="{extension}" ContentType="{media_extensions[extension]}"/>'
                        )

        except Exception as e:
            errors.append(f"  Error parsing [Content_Types].xml: {e}")

        if errors:
            print(f"FAILED - Found {len(errors)} content type declaration errors:")
            for error in errors:
                print(error)
            return False
        else:
            if self.verbose:
                print(
                    "PASSED - All content files are properly declared in [Content_Types].xml"
                )
            return True

    def validate_file_against_xsd(self, xml_file, verbose=False):
        xml_file = Path(xml_file).resolve()
        unpacked_dir = self.unpacked_dir.resolve()

        is_valid, current_errors = self._validate_single_file_xsd(
            xml_file, unpacked_dir
        )

        if is_valid is None:
            return None, set()  
        elif is_valid:
            return True, set()  

        original_errors = self._get_original_file_errors(xml_file)

        assert current_errors is not None
        new_errors = current_errors - original_errors

        new_errors = {
            e for e in new_errors
            if not any(pattern in e for pattern in self.IGNORED_VALIDATION_ERRORS)
        }

        if new_errors:
            if verbose:
                relative_path = xml_file.relative_to(unpacked_dir)
                print(f"FAILED - {relative_path}: {len(new_errors)} new error(s)")
                for error in list(new_errors)[:3]:
                    truncated = error[:250] + "..." if len(error) > 250 else error
                    print(f"  - {truncated}")
            return False, new_errors
        else:
            if verbose:
                print(
                    f"PASSED - No new errors (original had {len(current_errors)} errors)"
                )
            return True, set()

    def validate_against_xsd(self):
        new_errors = []
        original_error_count = 0
        valid_count = 0
        skipped_count = 0

        for xml_file in self.xml_files:
            relative_path = str(xml_file.relative_to(self.unpacked_dir))
            is_valid, new_file_errors = self.validate_file_against_xsd(
                xml_file, verbose=False
            )

            if is_valid is None:
                skipped_count += 1
                continue
            elif is_valid and not new_file_errors:
                valid_count += 1
                continue
            elif is_valid:
                original_error_count += 1
                valid_count += 1
                continue

            new_errors.append(f"  {relative_path}: {len(new_file_errors)} new error(s)")
            for error in list(new_file_errors)[:3]:  
                new_errors.append(
                    f"    - {error[:250]}..." if len(error) > 250 else f"    - {error}"
                )

        if self.verbose:
            print(f"Validated {len(self.xml_files)} files:")
            print(f"  - Valid: {valid_count}")
            print(f"  - Skipped (no schema): {skipped_count}")
            if original_error_count:
                print(f"  - With original errors (ignored): {original_error_count}")
            print(
                f"  - With NEW errors: {len(new_errors) > 0 and len([e for e in new_errors if not e.startswith('    ')]) or 0}"
            )

        if new_errors:
            print("\nFAILED - Found NEW validation errors:")
            for error in new_errors:
                print(error)
            return False
        else:
            if self.verbose:
                print("\nPASSED - No new XSD validation errors introduced")
            return True

    def _get_schema_path(self, xml_file):
        if xml_file.name in self.SCHEMA_MAPPINGS:
            return self.schemas_dir / self.SCHEMA_MAPPINGS[xml_file.name]

        if xml_file.suffix == ".rels":
            return self.schemas_dir / self.SCHEMA_MAPPINGS[".rels"]

        if "charts/" in str(xml_file) and xml_file.name.startswith("chart"):
            return self.schemas_dir / self.SCHEMA_MAPPINGS["chart"]

        if "theme/" in str(xml_file) and xml_file.name.startswith("theme"):
            return self.schemas_dir / self.SCHEMA_MAPPINGS["theme"]

        if xml_file.parent.name in self.MAIN_CONTENT_FOLDERS:
            return self.schemas_dir / self.SCHEMA_MAPPINGS[xml_file.parent.name]

        return None

    def _clean_ignorable_namespaces(self, xml_doc):
        xml_string = lxml.etree.tostring(xml_doc, encoding="unicode")
        xml_copy = lxml.etree.fromstring(xml_string)

        for elem in xml_copy.iter():
            attrs_to_remove = []

            for attr in elem.attrib:
                if "{" in attr:
                    ns = attr.split("}")[0][1:]
                    if ns not in self.OOXML_NAMESPACES:
                        attrs_to_remove.append(attr)

            for attr in attrs_to_remove:
                del elem.attrib[attr]

        self._remove_ignorable_elements(xml_copy)

        return lxml.etree.ElementTree(xml_copy)

    def _remove_ignorable_elements(self, root):
        elements_to_remove = []

        for elem in list(root):
            if not hasattr(elem, "tag") or callable(elem.tag):
                continue

            tag_str = str(elem.tag)
            if tag_str.startswith("{"):
                ns = tag_str.split("}")[0][1:]
                if ns not in self.OOXML_NAMESPACES:
                    elements_to_remove.append(elem)
                    continue

            self._remove_ignorable_elements(elem)

        for elem in elements_to_remove:
            root.remove(elem)

    def _preprocess_for_mc_ignorable(self, xml_doc):
        root = xml_doc.getroot()

        if f"{{{self.MC_NAMESPACE}}}Ignorable" in root.attrib:
            del root.attrib[f"{{{self.MC_NAMESPACE}}}Ignorable"]

        return xml_doc

    def _preprocess_for_schema(self, xml_doc, relative_path):
        return xml_doc

    def _validate_single_file_xsd(self, xml_file, base_path, schema_path=None):
        schema_path = schema_path or self._get_schema_path(xml_file)
        if not schema_path:
            return None, None  

        try:
            schema = _load_schema(str(schema_path))

            with open(xml_file, "r") as f:
                xml_doc = lxml.etree.parse(f)

            xml_doc, _ = self._remove_template_tags_from_text_nodes(xml_doc)
            xml_doc = self._preprocess_for_mc_ignorable(xml_doc)

            relative_path = xml_file.relative_to(base_path)
            if (
                relative_path.parts
                and relative_path.parts[0] in self.MAIN_CONTENT_FOLDERS
            ):
                xml_doc = self._clean_ignorable_namespaces(xml_doc)

            xml_doc = self._preprocess_for_schema(xml_doc, relative_path)

            if schema.validate(xml_doc):
                return True, set()
            else:
                errors = set()
                for error in schema.error_log:
                    errors.add(error.message)
                return False, errors

        except Exception as e:
            return False, {str(e)}

    def _get_original_file_errors(self, xml_file, schema_path=None):
        if self.original_file is None:
            return set()

        import tempfile
        import zipfile

        xml_file = Path(xml_file).resolve()
        unpacked_dir = self.unpacked_dir.resolve()
        relative_path = xml_file.relative_to(unpacked_dir)

        with tempfile.TemporaryDirectory() as temp_dir:
            temp_path = Path(temp_dir)

            try:
                with zipfile.ZipFile(self.original_file, "r") as zip_ref:
                    safe_extract(zip_ref, temp_path)
            except (zipfile.BadZipFile, ValueError, OSError):
                return set()

            original_xml_file = temp_path / relative_path

            if not original_xml_file.exists():
                return set()

            is_valid, errors = self._validate_single_file_xsd(
                original_xml_file, temp_path, schema_path=schema_path
            )
            return errors if errors else set()

    def _remove_template_tags_from_text_nodes(self, xml_doc):
        warnings = []
        template_pattern = re.compile(r"\{\{[^}]*\}\}")

        xml_string = lxml.etree.tostring(xml_doc, encoding="unicode")
        xml_copy = lxml.etree.fromstring(xml_string)

        def process_text_content(text, content_type):
            if not text:
                return text
            matches = list(template_pattern.finditer(text))
            if matches:
                for match in matches:
                    warnings.append(
                        f"Found template tag in {content_type}: {match.group()}"
                    )
                return template_pattern.sub("", text)
            return text

        for elem in xml_copy.iter():
            if not hasattr(elem, "tag") or callable(elem.tag):
                continue
            tag_str = str(elem.tag)
            if tag_str.endswith("}t") or tag_str == "t":
                continue

            elem.text = process_text_content(elem.text, "text content")
            elem.tail = process_text_content(elem.tail, "tail content")

        return lxml.etree.ElementTree(xml_copy), warnings


if __name__ == "__main__":
    raise RuntimeError("This module should not be run directly.")

"""
Validator for Word document XML files against XSD schemas.
"""

import random
import re
import tempfile
import zipfile
from pathlib import Path

import defusedxml.minidom
import lxml.etree

from helpers import safe_extract

from .base import BaseSchemaValidator


class DOCXSchemaValidator(BaseSchemaValidator):

    WORD_2006_NAMESPACE = "http://schemas.openxmlformats.org/wordprocessingml/2006/main"
    W14_NAMESPACE = "http://schemas.microsoft.com/office/word/2010/wordml"
    W16CID_NAMESPACE = "http://schemas.microsoft.com/office/word/2016/wordml/cid"

    ELEMENT_RELATIONSHIP_TYPES = {}

    def validate(self):
        if not self.validate_xml():
            return False

        all_valid = True
        if not self.validate_namespaces():
            all_valid = False

        if not self.validate_unique_ids():
            all_valid = False

        if not self.validate_file_references():
            all_valid = False

        if not self.validate_content_types():
            all_valid = False

        if not self.validate_against_xsd():
            all_valid = False

        if not self.validate_whitespace_preservation():
            all_valid = False

        if not self.validate_deletions():
            all_valid = False

        if not self.validate_insertions():
            all_valid = False

        if not self.validate_all_relationship_ids():
            all_valid = False

        if not self.validate_id_constraints():
            all_valid = False

        if not self.validate_comment_markers():
            all_valid = False

        self.compare_paragraph_counts()

        return all_valid

    def validate_whitespace_preservation(self):
        errors = []

        for xml_file in self.xml_files:
            if xml_file.name != "document.xml":
                continue

            try:
                root = lxml.etree.parse(str(xml_file)).getroot()

                for elem in root.iter(f"{{{self.WORD_2006_NAMESPACE}}}t"):
                    if elem.text:
                        text = elem.text
                        if re.search(r"^[ \t\n\r]", text) or re.search(
                            r"[ \t\n\r]$", text
                        ):
                            xml_space_attr = f"{{{self.XML_NAMESPACE}}}space"
                            if (
                                xml_space_attr not in elem.attrib
                                or elem.attrib[xml_space_attr] != "preserve"
                            ):
                                text_preview = (
                                    repr(text)[:50] + "..."
                                    if len(repr(text)) > 50
                                    else repr(text)
                                )
                                errors.append(
                                    f"  {xml_file.relative_to(self.unpacked_dir)}: "
                                    f"Line {elem.sourceline}: w:t element with whitespace missing xml:space='preserve': {text_preview}"
                                )

            except (lxml.etree.XMLSyntaxError, Exception) as e:
                errors.append(
                    f"  {xml_file.relative_to(self.unpacked_dir)}: Error: {e}"
                )

        if errors:
            print(f"FAILED - Found {len(errors)} whitespace preservation violations:")
            for error in errors:
                print(error)
            return False
        else:
            if self.verbose:
                print("PASSED - All whitespace is properly preserved")
            return True

    def validate_deletions(self):
        errors = []

        for xml_file in self.xml_files:
            if xml_file.name != "document.xml":
                continue

            try:
                root = lxml.etree.parse(str(xml_file)).getroot()
                namespaces = {"w": self.WORD_2006_NAMESPACE}

                for t_elem in root.xpath(".//w:del//w:t", namespaces=namespaces):
                    if t_elem.text:
                        text_preview = (
                            repr(t_elem.text)[:50] + "..."
                            if len(repr(t_elem.text)) > 50
                            else repr(t_elem.text)
                        )
                        errors.append(
                            f"  {xml_file.relative_to(self.unpacked_dir)}: "
                            f"Line {t_elem.sourceline}: <w:t> found within <w:del>: {text_preview}"
                        )

                for instr_elem in root.xpath(
                    ".//w:del//w:instrText", namespaces=namespaces
                ):
                    text_preview = (
                        repr(instr_elem.text or "")[:50] + "..."
                        if len(repr(instr_elem.text or "")) > 50
                        else repr(instr_elem.text or "")
                    )
                    errors.append(
                        f"  {xml_file.relative_to(self.unpacked_dir)}: "
                        f"Line {instr_elem.sourceline}: <w:instrText> found within <w:del> (use <w:delInstrText>): {text_preview}"
                    )

            except (lxml.etree.XMLSyntaxError, Exception) as e:
                errors.append(
                    f"  {xml_file.relative_to(self.unpacked_dir)}: Error: {e}"
                )

        if errors:
            print(f"FAILED - Found {len(errors)} deletion validation violations:")
            for error in errors:
                print(error)
            return False
        else:
            if self.verbose:
                print("PASSED - No w:t elements found within w:del elements")
            return True

    def count_paragraphs_in_unpacked(self):
        count = 0

        for xml_file in self.xml_files:
            if xml_file.name != "document.xml":
                continue

            try:
                root = lxml.etree.parse(str(xml_file)).getroot()
                paragraphs = root.findall(f".//{{{self.WORD_2006_NAMESPACE}}}p")
                count = len(paragraphs)
            except Exception as e:
                print(f"Error counting paragraphs in unpacked document: {e}")

        return count

    def count_paragraphs_in_original(self):
        original = self.original_file
        if original is None:
            return 0

        count = 0

        try:
            with tempfile.TemporaryDirectory() as temp_dir:
                with zipfile.ZipFile(original, "r") as zip_ref:
                    safe_extract(zip_ref, Path(temp_dir))

                doc_xml_path = temp_dir + "/word/document.xml"
                root = lxml.etree.parse(doc_xml_path).getroot()

                paragraphs = root.findall(f".//{{{self.WORD_2006_NAMESPACE}}}p")
                count = len(paragraphs)

        except Exception as e:
            print(f"Error counting paragraphs in original document: {e}")

        return count

    def validate_insertions(self):
        errors = []

        for xml_file in self.xml_files:
            if xml_file.name != "document.xml":
                continue

            try:
                root = lxml.etree.parse(str(xml_file)).getroot()
                namespaces = {"w": self.WORD_2006_NAMESPACE}

                invalid_elements = root.xpath(
                    ".//w:ins//w:delText[not(ancestor::w:del)]", namespaces=namespaces
                )

                for elem in invalid_elements:
                    text_preview = (
                        repr(elem.text or "")[:50] + "..."
                        if len(repr(elem.text or "")) > 50
                        else repr(elem.text or "")
                    )
                    errors.append(
                        f"  {xml_file.relative_to(self.unpacked_dir)}: "
                        f"Line {elem.sourceline}: <w:delText> within <w:ins>: {text_preview}"
                    )

            except (lxml.etree.XMLSyntaxError, Exception) as e:
                errors.append(
                    f"  {xml_file.relative_to(self.unpacked_dir)}: Error: {e}"
                )

        if errors:
            print(f"FAILED - Found {len(errors)} insertion validation violations:")
            for error in errors:
                print(error)
            return False
        else:
            if self.verbose:
                print("PASSED - No w:delText elements within w:ins elements")
            return True

    def compare_paragraph_counts(self):
        new_count = self.count_paragraphs_in_unpacked()
        if self.original_file is None:
            print(f"\nParagraphs: {new_count}")
            return

        original_count = self.count_paragraphs_in_original()
        diff = new_count - original_count
        diff_str = f"+{diff}" if diff > 0 else str(diff)
        print(f"\nParagraphs: {original_count} → {new_count} ({diff_str})")

    def _parse_id_value(self, val: str, base: int = 16) -> int:
        return int(val, base)

    def validate_id_constraints(self):
        errors = []
        para_id_attr = f"{{{self.W14_NAMESPACE}}}paraId"
        durable_id_attr = f"{{{self.W16CID_NAMESPACE}}}durableId"

        for xml_file in self.xml_files:
            try:
                for elem in lxml.etree.parse(str(xml_file)).iter():
                    if val := elem.get(para_id_attr):
                        try:
                            if self._parse_id_value(val, base=16) >= 0x80000000:
                                errors.append(
                                    f"  {xml_file.name}:{elem.sourceline}: paraId={val} >= 0x80000000"
                                )
                        except ValueError:
                            errors.append(
                                f"  {xml_file.name}:{elem.sourceline}: "
                                f"paraId={val} is not valid hex"
                            )

                    if val := elem.get(durable_id_attr):
                        if xml_file.name == "numbering.xml":
                            try:
                                if self._parse_id_value(val, base=10) >= 0x7FFFFFFF:
                                    errors.append(
                                        f"  {xml_file.name}:{elem.sourceline}: "
                                        f"durableId={val} >= 0x7FFFFFFF"
                                    )
                            except ValueError:
                                errors.append(
                                    f"  {xml_file.name}:{elem.sourceline}: "
                                    f"durableId={val} must be decimal in numbering.xml"
                                )
                        else:
                            try:
                                if self._parse_id_value(val, base=16) >= 0x7FFFFFFF:
                                    errors.append(
                                        f"  {xml_file.name}:{elem.sourceline}: "
                                        f"durableId={val} >= 0x7FFFFFFF"
                                    )
                            except ValueError:
                                errors.append(
                                    f"  {xml_file.name}:{elem.sourceline}: "
                                    f"durableId={val} is not valid hex"
                                )
            except lxml.etree.XMLSyntaxError:
                continue  

        if errors:
            print(f"FAILED - {len(errors)} ID constraint violations:")
            for e in errors:
                print(e)
        elif self.verbose:
            print("PASSED - All paraId/durableId values within constraints")
        return not errors

    def validate_comment_markers(self):
        errors = []

        document_xml = None
        comments_xml = None
        for xml_file in self.xml_files:
            if xml_file.name == "document.xml" and "word" in str(xml_file):
                document_xml = xml_file
            elif xml_file.name == "comments.xml":
                comments_xml = xml_file

        if not document_xml:
            if self.verbose:
                print("PASSED - No document.xml found (skipping comment validation)")
            return True

        try:
            doc_root = lxml.etree.parse(str(document_xml)).getroot()
            namespaces = {"w": self.WORD_2006_NAMESPACE}

            range_starts = {
                elem.get(f"{{{self.WORD_2006_NAMESPACE}}}id")
                for elem in doc_root.xpath(
                    ".//w:commentRangeStart", namespaces=namespaces
                )
            }
            range_ends = {
                elem.get(f"{{{self.WORD_2006_NAMESPACE}}}id")
                for elem in doc_root.xpath(
                    ".//w:commentRangeEnd", namespaces=namespaces
                )
            }
            references = {
                elem.get(f"{{{self.WORD_2006_NAMESPACE}}}id")
                for elem in doc_root.xpath(
                    ".//w:commentReference", namespaces=namespaces
                )
            }

            orphaned_ends = range_ends - range_starts
            for comment_id in sorted(
                orphaned_ends, key=lambda x: int(x) if x and x.isdigit() else 0
            ):
                errors.append(
                    f'  document.xml: commentRangeEnd id="{comment_id}" has no matching commentRangeStart'
                )

            orphaned_starts = range_starts - range_ends
            for comment_id in sorted(
                orphaned_starts, key=lambda x: int(x) if x and x.isdigit() else 0
            ):
                errors.append(
                    f'  document.xml: commentRangeStart id="{comment_id}" has no matching commentRangeEnd'
                )

            comment_ids = set()
            if comments_xml and comments_xml.exists():
                comments_root = lxml.etree.parse(str(comments_xml)).getroot()
                comment_ids = {
                    elem.get(f"{{{self.WORD_2006_NAMESPACE}}}id")
                    for elem in comments_root.xpath(
                        ".//w:comment", namespaces=namespaces
                    )
                }

                marker_ids = range_starts | range_ends | references
                invalid_refs = marker_ids - comment_ids
                for comment_id in sorted(
                    invalid_refs, key=lambda x: int(x) if x and x.isdigit() else 0
                ):
                    if comment_id:  
                        errors.append(
                            f'  document.xml: marker id="{comment_id}" references non-existent comment'
                        )

        except (lxml.etree.XMLSyntaxError, Exception) as e:
            errors.append(f"  Error parsing XML: {e}")

        if errors:
            print(f"FAILED - {len(errors)} comment marker violations:")
            for error in errors:
                print(error)
            return False
        else:
            if self.verbose:
                print("PASSED - All comment markers properly paired")
            return True

    def repair(self) -> int:
        repairs = super().repair()
        repairs += self.repair_durableId()
        return repairs

    def repair_durableId(self) -> int:
        DURABLE_ID_ATTRS = ("w16cid:durableId", "w16cex:durableId")
        repairs = 0
        renames: dict = {}  

        for xml_file in self.xml_files:
            try:
                content = xml_file.read_text(encoding="utf-8")
                dom = defusedxml.minidom.parseString(content)
                is_numbering = xml_file.name == "numbering.xml"
                base = 10 if is_numbering else 16
                pending = []  
                seen_in_file = set()
                modified = False

                for elem in dom.getElementsByTagName("*"):
                    for attr_name in DURABLE_ID_ATTRS:
                        if not elem.hasAttribute(attr_name):
                            continue

                        durable_id = elem.getAttribute(attr_name)
                        try:
                            key = self._parse_id_value(durable_id, base=base)
                            needs_repair = key >= 0x7FFFFFFF
                        except ValueError:
                            key = durable_id
                            needs_repair = True

                        if needs_repair:
                            if key in seen_in_file:
                                value = random.randint(1, 0x7FFFFFFE)
                            else:
                                seen_in_file.add(key)
                                if key not in renames:
                                    renames[key] = random.randint(1, 0x7FFFFFFE)
                                value = renames[key]
                            new_id = str(value) if is_numbering else f"{value:08X}"

                            elem.setAttribute(attr_name, new_id)
                            pending.append(
                                f"  Repaired: {xml_file.name}: durableId {durable_id} → {new_id}"
                            )
                            modified = True

                if modified:
                    xml_file.write_bytes(dom.toxml(encoding="UTF-8"))
                    for message in pending:
                        print(message)
                    repairs += len(pending)

            except Exception:
                pass

        return repairs


if __name__ == "__main__":
    raise RuntimeError("This module should not be run directly.")

"""
Validator for PowerPoint presentation XML files against XSD schemas.
"""

import re
from pathlib import Path

from helpers import opc_target, rels_source_part, safe_extract

from .base import BaseSchemaValidator


class PPTXSchemaValidator(BaseSchemaValidator):

    PRESENTATIONML_NAMESPACE = (
        "http://schemas.openxmlformats.org/presentationml/2006/main"
    )

    ELEMENT_RELATIONSHIP_TYPES = {
        "sldid": "slide",
        "sldmasterid": "slidemaster",
        "notesmasterid": "notesmaster",
        "sldlayoutid": "slidelayout",
        "themeid": "theme",
        "tablestyleid": "tablestyles",
    }

    def validate(self):
        if not self.validate_xml():
            return False

        all_valid = True
        if not self.validate_namespaces():
            all_valid = False

        if not self.validate_unique_ids():
            all_valid = False

        if not self.validate_uuid_ids():
            all_valid = False

        if not self.validate_file_references():
            all_valid = False

        if not self.validate_slide_layout_ids():
            all_valid = False

        if not self.validate_content_types():
            all_valid = False

        if not self.validate_against_xsd():
            all_valid = False

        if not self.validate_notes_slide_references():
            all_valid = False

        if not self.validate_all_relationship_ids():
            all_valid = False

        if not self.validate_no_duplicate_slide_layouts():
            all_valid = False

        if not self.validate_master_theme_uniqueness():
            all_valid = False

        if not self.validate_charts():
            all_valid = False

        if not self.validate_slides():
            all_valid = False

        return all_valid

    def _package_map(self) -> dict:
        wanted = []
        wanted += list(self.unpacked_dir.glob("[[]Content_Types[]].xml"))
        wanted += list(self.unpacked_dir.glob("ppt/presentation.xml"))
        wanted += list(self.unpacked_dir.glob("ppt/theme/*.xml"))
        wanted += list(self.unpacked_dir.glob("ppt/theme/_rels/*.rels"))
        wanted += list(self.unpacked_dir.glob("ppt/charts/chart*.xml"))
        for group in ("slideMasters", "notesMasters", "handoutMasters"):
            wanted += list(self.unpacked_dir.glob(f"ppt/{group}/*.xml"))
            wanted += list(self.unpacked_dir.glob(f"ppt/{group}/_rels/*.rels"))
        return {
            p.relative_to(self.unpacked_dir).as_posix(): p.read_bytes()
            for p in wanted
            if p.is_file()
        }

    def validate_master_theme_uniqueness(self):
        from helpers.pptx_theme import _NOTES_MASTERS, live_shared_master_themes

        shared = live_shared_master_themes(self._package_map())
        if shared:
            print(f"FAILED - Found {len(shared)} master(s) sharing a theme part:")
            for message in shared:
                print(f"  {message}")
            if any(m.startswith(_NOTES_MASTERS) for m in shared):
                print("  Fix: in ppt/presentation.xml, move <p:notesMasterIdLst> back to "
                      "directly after <p:sldIdLst>. PowerPoint reads that happily.")
            else:
                print("  Fix: give each master its own theme part.")
            return False

        if self.verbose:
            print("PASSED - No master shares a theme part in a way PowerPoint refuses")
        return True

    def validate_charts(self):
        from helpers.pptx_chart import find_chart_problems

        problems = find_chart_problems(self._package_map())
        if problems:
            print(f"FAILED - Found {len(problems)} chart problem(s) PowerPoint rejects:")
            for message in problems:
                print(f"  {message}")
            return False

        if self.verbose:
            print("PASSED - Charts satisfy the constraints PowerPoint enforces")
        return True

    def _original_slide_defects(self, schema) -> set[str]:
        import tempfile
        import zipfile

        from helpers.pptx_slide import SLIDE_PART_RE, fatal_slide_errors

        if self.original_file is None:
            return set()

        found: set[str] = set()
        with tempfile.TemporaryDirectory() as temp_dir:
            temp_path = Path(temp_dir)
            try:
                with zipfile.ZipFile(self.original_file, "r") as zf:
                    safe_extract(zf, temp_path)
            except (zipfile.BadZipFile, ValueError, OSError):
                return set()  

            for part in sorted(temp_path.rglob("*.xml")):
                relative = part.relative_to(temp_path).as_posix()
                if not SLIDE_PART_RE.fullmatch(relative):
                    continue
                ok, errors = self._validate_single_file_xsd(
                    part.resolve(), temp_path.resolve(), schema_path=schema
                )
                if ok is None or ok or not errors:
                    continue
                found |= set(fatal_slide_errors(set(errors)))
        return found

    def validate_slides(self):
        from helpers.pptx_slide import (
            SLIDE_PART_RE,
            fatal_slide_errors,
            is_schema_verdict,
        )

        schema = self.schemas_dir / self.SCHEMA_MAPPINGS["ppt"]
        inherited = self._original_slide_defects(schema)
        problems: list[str] = []
        broken: list[str] = []

        for xml_file in self.xml_files:
            relative = xml_file.relative_to(self.unpacked_dir).as_posix()
            if not SLIDE_PART_RE.fullmatch(relative):
                continue
            ok, errors = self._validate_single_file_xsd(
                xml_file.resolve(), self.unpacked_dir.resolve(), schema_path=schema
            )
            if ok is None or not errors:
                continue

            unreadable = [f"{relative}: {e}" for e in errors if not is_schema_verdict(e)]
            if unreadable:
                broken.extend(unreadable)
                continue
            if ok:
                continue

            for message in fatal_slide_errors(set(errors)):
                if message in inherited:
                    continue  
                problems.append(f"{relative}: {message}")

        if broken:
            print(f"FAILED - Could not check {len(broken)} slide part(s):")
            for message in sorted(broken):
                print(f"  {message[:240]}")

        if problems:
            print(f"FAILED - Found {len(problems)} slide problem(s) PowerPoint rejects:")
            for message in sorted(problems):
                print(f"  {message[:240]}")

        if broken or problems:
            return False

        if self.verbose:
            print("PASSED - Slide XML has none of the defects PowerPoint refuses")
        return True

    def _get_schema_path(self, xml_file):
        if xml_file.parent.name == "charts" and xml_file.name.startswith("chart"):
            return None
        return super()._get_schema_path(xml_file)

    def _preprocess_for_schema(self, xml_doc, relative_path):
        if relative_path.as_posix() != "ppt/presentation.xml":
            return xml_doc

        root = xml_doc.getroot()
        ns = f"{{{self.PRESENTATIONML_NAMESPACE}}}"
        notes = root.find(f"{ns}notesMasterIdLst")
        slides = root.find(f"{ns}sldIdLst")
        if notes is None or slides is None:
            return xml_doc

        children = list(root)
        if children.index(notes) < children.index(slides):
            return xml_doc  

        root.remove(notes)
        root.insert(list(root).index(slides), notes)
        return xml_doc

    def validate_uuid_ids(self):
        import lxml.etree

        errors = []
        uuid_pattern = re.compile(
            r"^[\{\(]?[0-9A-Fa-f]{8}-?[0-9A-Fa-f]{4}-?[0-9A-Fa-f]{4}-?[0-9A-Fa-f]{4}-?[0-9A-Fa-f]{12}[\}\)]?$"
        )

        for xml_file in self.xml_files:
            try:
                root = lxml.etree.parse(str(xml_file)).getroot()

                for elem in root.iter():
                    for attr, value in elem.attrib.items():
                        attr_name = attr.split("}")[-1].lower()
                        if attr_name == "id" or attr_name.endswith("id"):
                            if self._looks_like_uuid(value):
                                if not uuid_pattern.match(value):
                                    errors.append(
                                        f"  {xml_file.relative_to(self.unpacked_dir)}: "
                                        f"Line {elem.sourceline}: ID '{value}' appears to be a UUID but contains invalid hex characters"
                                    )

            except (lxml.etree.XMLSyntaxError, Exception) as e:
                errors.append(
                    f"  {xml_file.relative_to(self.unpacked_dir)}: Error: {e}"
                )

        if errors:
            print(f"FAILED - Found {len(errors)} UUID ID validation errors:")
            for error in errors:
                print(error)
            return False
        else:
            if self.verbose:
                print("PASSED - All UUID-like IDs contain valid hex values")
            return True

    def _looks_like_uuid(self, value):
        clean_value = value.strip("{}()").replace("-", "")
        return len(clean_value) == 32 and all(c.isalnum() for c in clean_value)

    def validate_slide_layout_ids(self):
        import lxml.etree

        errors = []

        slide_masters = list(self.unpacked_dir.glob("ppt/slideMasters/*.xml"))

        if not slide_masters:
            if self.verbose:
                print("PASSED - No slide masters found")
            return True

        for slide_master in slide_masters:
            try:
                root = lxml.etree.parse(str(slide_master)).getroot()

                rels_file = slide_master.parent / "_rels" / f"{slide_master.name}.rels"

                if not rels_file.exists():
                    errors.append(
                        f"  {slide_master.relative_to(self.unpacked_dir)}: "
                        f"Missing relationships file: {rels_file.relative_to(self.unpacked_dir)}"
                    )
                    continue

                rels_root = lxml.etree.parse(str(rels_file)).getroot()

                valid_layout_rids = set()
                for rel in rels_root.findall(
                    f".//{{{self.PACKAGE_RELATIONSHIPS_NAMESPACE}}}Relationship"
                ):
                    rel_type = rel.get("Type", "")
                    if "slideLayout" in rel_type:
                        valid_layout_rids.add(rel.get("Id"))

                for sld_layout_id in root.findall(
                    f".//{{{self.PRESENTATIONML_NAMESPACE}}}sldLayoutId"
                ):
                    r_id = sld_layout_id.get(
                        f"{{{self.OFFICE_RELATIONSHIPS_NAMESPACE}}}id"
                    )
                    layout_id = sld_layout_id.get("id")

                    if r_id and r_id not in valid_layout_rids:
                        errors.append(
                            f"  {slide_master.relative_to(self.unpacked_dir)}: "
                            f"Line {sld_layout_id.sourceline}: sldLayoutId with id='{layout_id}' "
                            f"references r:id='{r_id}' which is not found in slide layout relationships"
                        )

            except (lxml.etree.XMLSyntaxError, Exception) as e:
                errors.append(
                    f"  {slide_master.relative_to(self.unpacked_dir)}: Error: {e}"
                )

        if errors:
            print(f"FAILED - Found {len(errors)} slide layout ID validation errors:")
            for error in errors:
                print(error)
            print(
                "Remove invalid references or add missing slide layouts to the relationships file."
            )
            return False
        else:
            if self.verbose:
                print("PASSED - All slide layout IDs reference valid slide layouts")
            return True

    def validate_no_duplicate_slide_layouts(self):
        import lxml.etree

        errors = []
        slide_rels_files = list(self.unpacked_dir.glob("ppt/slides/_rels/*.xml.rels"))

        for rels_file in slide_rels_files:
            try:
                root = lxml.etree.parse(str(rels_file)).getroot()

                layout_rels = [
                    rel
                    for rel in root.findall(
                        f".//{{{self.PACKAGE_RELATIONSHIPS_NAMESPACE}}}Relationship"
                    )
                    if "slideLayout" in rel.get("Type", "")
                ]

                if len(layout_rels) > 1:
                    errors.append(
                        f"  {rels_file.relative_to(self.unpacked_dir)}: has {len(layout_rels)} slideLayout references"
                    )

            except Exception as e:
                errors.append(
                    f"  {rels_file.relative_to(self.unpacked_dir)}: Error: {e}"
                )

        if errors:
            print("FAILED - Found slides with duplicate slideLayout references:")
            for error in errors:
                print(error)
            return False
        else:
            if self.verbose:
                print("PASSED - All slides have exactly one slideLayout reference")
            return True

    def validate_notes_slide_references(self):
        import lxml.etree

        errors = []
        notes_slide_references = {}  

        slide_rels_files = list(self.unpacked_dir.glob("ppt/slides/_rels/*.xml.rels"))

        if not slide_rels_files:
            if self.verbose:
                print("PASSED - No slide relationship files found")
            return True

        for rels_file in slide_rels_files:
            try:
                root = lxml.etree.parse(str(rels_file)).getroot()

                for rel in root.findall(
                    f".//{{{self.PACKAGE_RELATIONSHIPS_NAMESPACE}}}Relationship"
                ):
                    rel_type = rel.get("Type", "")
                    if "notesSlide" in rel_type:
                        part = opc_target(
                            rel.get("Target", ""),
                            rels_source_part(rels_file, self.unpacked_dir),
                            rel.get("TargetMode", ""),
                        )
                        if part:
                            slide_name = rels_file.stem.replace(
                                ".xml", ""
                            )  

                            notes_slide_references.setdefault(part, []).append(
                                (slide_name, rels_file)
                            )

            except (lxml.etree.XMLSyntaxError, Exception) as e:
                errors.append(
                    f"  {rels_file.relative_to(self.unpacked_dir)}: Error: {e}"
                )

        for target, references in notes_slide_references.items():
            if len(references) > 1:
                slide_names = [ref[0] for ref in references]
                errors.append(
                    f"  Notes slide '{target}' is referenced by multiple slides: {', '.join(slide_names)}"
                )
                for slide_name, rels_file in references:
                    errors.append(f"    - {rels_file.relative_to(self.unpacked_dir)}")

        if errors:
            print(
                f"FAILED - Found {len([e for e in errors if not e.startswith('    ')])} notes slide reference validation errors:"
            )
            for error in errors:
                print(error)
            print("Each slide may optionally have its own slide file.")
            return False
        else:
            if self.verbose:
                print("PASSED - All notes slide references are unique")
            return True


if __name__ == "__main__":
    raise RuntimeError("This module should not be run directly.")

"""
Validator for tracked changes in Word documents.

Detects untracked edits in word/document.xml: text that differs from the
original without a <w:ins>/<w:del> wrapper recording it. The tracked changes
that are new relative to the original are undone, and the result is compared
against the original; whatever text still differs was edited without being
tracked.

Only the document body is compared. Headers, footers, footnotes and endnotes
are separate parts and are not checked.
"""

import subprocess
import tempfile
import zipfile
from pathlib import Path

import defusedxml.ElementTree as ET
from defusedxml.common import DefusedXmlException

from helpers import rendered_text, safe_extract


class RedliningValidator:

    def __init__(self, unpacked_dir, original_docx, verbose=False):
        self.unpacked_dir = Path(unpacked_dir)
        self.original_docx = Path(original_docx)
        self.verbose = verbose
        self.namespaces = {
            "w": "http://schemas.openxmlformats.org/wordprocessingml/2006/main"
        }

    def repair(self) -> int:
        return 0

    def validate(self):
        modified_file = self.unpacked_dir / "word" / "document.xml"
        if not modified_file.exists():
            print(f"FAILED - Modified document.xml not found at {modified_file}")
            return False

        with tempfile.TemporaryDirectory() as temp_dir:
            temp_path = Path(temp_dir)

            try:
                with zipfile.ZipFile(self.original_docx, "r") as zip_ref:
                    safe_extract(zip_ref, temp_path)
            except Exception as e:
                print(f"FAILED - Error unpacking original docx: {e}")
                return False

            original_file = temp_path / "word" / "document.xml"
            if not original_file.exists():
                print(
                    f"FAILED - Original document.xml not found in {self.original_docx}"
                )
                return False

            try:
                modified_tree = ET.parse(modified_file)
                modified_root = modified_tree.getroot()
                original_tree = ET.parse(original_file)
                original_root = original_tree.getroot()
            except (ET.ParseError, DefusedXmlException) as e:
                print(f"FAILED - Error parsing XML files: {e}")
                return False

            new_changes = self._new_tracked_changes(original_root, modified_root)
            self._remove_tracked_changes(modified_root, new_changes)

            modified_text = self._extract_text_content(modified_root)
            original_text = self._extract_text_content(original_root)

            if modified_text != original_text:
                error_message = self._generate_detailed_diff(
                    original_text, modified_text
                )
                print(error_message)
                return False

            if self.verbose:
                print(
                    f"PASSED - All {len(new_changes)} change(s) against the original "
                    "are properly tracked"
                )
            return True

    def _tracked_change_elements(self, root):
        ins_tag = f"{{{self.namespaces['w']}}}ins"
        del_tag = f"{{{self.namespaces['w']}}}del"
        return [elem for elem in root.iter() if elem.tag in (ins_tag, del_tag)]

    def _rendered_text(self, elem):
        preserve = elem.get("{http://www.w3.org/XML/1998/namespace}space") == "preserve"
        return rendered_text(elem.text or "", preserve)

    def _text_elements(self, elem):
        w = self.namespaces["w"]
        return [
            node
            for node in elem.iter()
            if node.tag in (f"{{{w}}}t", f"{{{w}}}delText")
        ]

    def _tracked_change_key(self, elem):
        w = self.namespaces["w"]
        text = "".join(self._rendered_text(node) for node in self._text_elements(elem))
        return (elem.tag, elem.get(f"{{{w}}}author"), elem.get(f"{{{w}}}date"), text)

    def _new_tracked_changes(self, original_root, modified_root):
        original = self._tracked_change_elements(original_root)
        modified = self._tracked_change_elements(modified_root)

        pool = {}
        for elem in original:
            pool.setdefault(self._tracked_change_key(elem), []).append(elem)

        matched, leftover = set(), []
        for elem in modified:
            bucket = pool.get(self._tracked_change_key(elem))
            if bucket:
                matched.add(bucket.pop())
            else:
                leftover.append(elem)

        def group(elem):
            return self._tracked_change_key(elem)[:3]

        def text_of(elems):
            return "".join(self._tracked_change_key(e)[3] for e in elems)

        unmatched_original = {}
        for elem in original:
            if elem not in matched:
                unmatched_original.setdefault(group(elem), []).append(elem)

        by_group = {}
        for elem in leftover:
            by_group.setdefault(group(elem), []).append(elem)

        new = set()
        for key, elems in by_group.items():
            rebuilt = text_of(elems)
            if rebuilt and rebuilt == text_of(unmatched_original.get(key, [])):
                continue  
            new.update(elems)
        return new

    def _generate_detailed_diff(self, original_text, modified_text):
        error_parts = [
            "FAILED - Document text doesn't match after removing the tracked changes",
            "",
            "Likely causes:",
            "  1. Modified text inside another author's <w:ins> or <w:del> tags",
            "  2. Made edits without proper tracked changes",
            "  3. Didn't nest <w:del> inside <w:ins> when deleting another's insertion",
            "  4. Rewrote another author's <w:ins>/<w:del> and changed its text on",
            "     the way. A tracked change from the original is recognised by its",
            "     author, date and text; anything that doesn't reproduce one exactly",
            "     reads as new, and the text it carried is reported missing.",
            "",
            "For pre-redlined documents, use correct patterns:",
            "  - To reject another's INSERTION: Nest <w:del> inside their <w:ins>",
            "  - To reject PART of one: nest <w:del> around only the runs you reject.",
            "    Their <w:ins> may be split around it, so long as the pieces keep",
            "    their author and date and still spell out the same text.",
            "  - To restore another's DELETION: Add new <w:ins> AFTER their <w:del>",
            "",
        ]

        git_diff = self._get_git_word_diff(original_text, modified_text)
        if git_diff:
            error_parts.extend(["Differences:", "============", git_diff])
        else:
            error_parts.append("Unable to generate word diff (git not available)")

        return "\n".join(error_parts)

    def _get_git_word_diff(self, original_text, modified_text):
        try:
            with tempfile.TemporaryDirectory() as temp_dir:
                temp_path = Path(temp_dir)

                original_file = temp_path / "original.txt"
                modified_file = temp_path / "modified.txt"

                original_file.write_text(original_text, encoding="utf-8")
                modified_file.write_text(modified_text, encoding="utf-8")

                result = subprocess.run(
                    [
                        "git",
                        "diff",
                        "--word-diff=plain",
                        "--word-diff-regex=.",  
                        "-U0",  
                        "--no-index",
                        str(original_file),
                        str(modified_file),
                    ],
                    capture_output=True,
                    text=True,
                )

                if result.stdout.strip():
                    lines = result.stdout.split("\n")
                    content_lines = []
                    in_content = False
                    for line in lines:
                        if line.startswith("@@"):
                            in_content = True
                            continue
                        if in_content and line.strip():
                            content_lines.append(line)

                    if content_lines:
                        return "\n".join(content_lines)

                result = subprocess.run(
                    [
                        "git",
                        "diff",
                        "--word-diff=plain",
                        "-U0",  
                        "--no-index",
                        str(original_file),
                        str(modified_file),
                    ],
                    capture_output=True,
                    text=True,
                )

                if result.stdout.strip():
                    lines = result.stdout.split("\n")
                    content_lines = []
                    in_content = False
                    for line in lines:
                        if line.startswith("@@"):
                            in_content = True
                            continue
                        if in_content and line.strip():
                            content_lines.append(line)
                    return "\n".join(content_lines)

        except (subprocess.CalledProcessError, FileNotFoundError, Exception):
            pass

        return None

    def _remove_tracked_changes(self, root, targets):
        ins_tag = f"{{{self.namespaces['w']}}}ins"
        del_tag = f"{{{self.namespaces['w']}}}del"

        for parent in root.iter():
            to_remove = []
            for child in parent:
                if child.tag == ins_tag and child in targets:
                    to_remove.append(child)
            for elem in to_remove:
                parent.remove(elem)

        deltext_tag = f"{{{self.namespaces['w']}}}delText"
        t_tag = f"{{{self.namespaces['w']}}}t"

        for parent in root.iter():
            to_process = []
            for child in parent:
                if child.tag == del_tag and child in targets:
                    to_process.append((child, list(parent).index(child)))

            for del_elem, del_index in reversed(to_process):
                for elem in del_elem.iter():
                    if elem.tag == deltext_tag:
                        elem.tag = t_tag

                for child in reversed(list(del_elem)):
                    parent.insert(del_index, child)
                parent.remove(del_elem)

    def _extract_text_content(self, root):
        p_tag = f"{{{self.namespaces['w']}}}p"
        t_tag = f"{{{self.namespaces['w']}}}t"

        paragraphs = []
        for p_elem in root.findall(f".//{p_tag}"):
            text_parts = []
            for t_elem in p_elem.findall(f".//{t_tag}"):
                text_parts.append(self._rendered_text(t_elem))
            paragraph_text = "".join(text_parts)
            if paragraph_text:
                paragraphs.append(paragraph_text)

        return "\n".join(paragraphs)


if __name__ == "__main__":
    raise RuntimeError("This module should not be run directly.")

"""
Validation modules for Word document processing.
"""

from .base import BaseSchemaValidator
from .docx import DOCXSchemaValidator
from .pptx import PPTXSchemaValidator
from .redlining import RedliningValidator

__all__ = [
    "BaseSchemaValidator",
    "DOCXSchemaValidator",
    "PPTXSchemaValidator",
    "RedliningValidator",
]