#!/usr/bin/env python3
"""Enforce Core ownership of repeated WebUI layout and dialog anatomy."""

from __future__ import annotations

import pathlib
import re
import sys


META_ROOT = pathlib.Path(__file__).resolve().parents[2]
REPOS_ROOT = META_ROOT.parent
CORE_INDEX = pathlib.Path("govoplan-core/webui/src/index.ts")
DIALOG_WIDTH_EXCEPTIONS = META_ROOT / "tools/checks/shared-webui-dialog-width-exceptions.txt"

RAW_ELEMENT = re.compile(
    r'<(?P<tag>div|span|header|section|form)\b(?P<attrs>[^>]*?)'
    r'\bclassName="(?P<classes>[^"]+)"',
    re.DOTALL,
)
LEGACY_LAYOUT_TOKENS = {
    "form-grid",
    "admin-form-grid",
    "dashboard-grid",
    "settings-grid",
    "admin-dialog",
    "admin-dialog-wide",
    "admin-details-grid",
    "detail-list",
    "metric-grid",
}
CENTRAL_COMPONENTS = {
    "ActionToolbar": pathlib.Path(
        "govoplan-core/webui/src/components/ActionToolbar.tsx"
    ),
    "ToolbarGroup": pathlib.Path(
        "govoplan-core/webui/src/components/ActionToolbar.tsx"
    ),
    "ToolbarSpacer": pathlib.Path(
        "govoplan-core/webui/src/components/ActionToolbar.tsx"
    ),
    "ContentGrid": pathlib.Path(
        "govoplan-core/webui/src/components/ContentGrid.tsx"
    ),
    "FormGrid": pathlib.Path("govoplan-core/webui/src/components/ContentGrid.tsx"),
    "FormLayout": pathlib.Path(
        "govoplan-core/webui/src/components/ContentGrid.tsx"
    ),
    "GridItem": pathlib.Path("govoplan-core/webui/src/components/ContentGrid.tsx"),
    "FormSection": pathlib.Path(
        "govoplan-core/webui/src/components/FormSection.tsx"
    ),
    "DialogActions": pathlib.Path(
        "govoplan-core/webui/src/components/DialogAnatomy.tsx"
    ),
    "DialogForm": pathlib.Path(
        "govoplan-core/webui/src/components/DialogAnatomy.tsx"
    ),
    "DialogSection": pathlib.Path(
        "govoplan-core/webui/src/components/DialogAnatomy.tsx"
    ),
    "DescriptionList": pathlib.Path(
        "govoplan-core/webui/src/components/DescriptionList.tsx"
    ),
    "DescriptionItem": pathlib.Path(
        "govoplan-core/webui/src/components/DescriptionList.tsx"
    ),
    "MetricGrid": pathlib.Path(
        "govoplan-core/webui/src/components/MetricGrid.tsx"
    ),
}
REQUIRED_CONSUMERS = {
    "ActionToolbar": (
        pathlib.Path("govoplan-core/webui/src/components/WysiwygEditor.tsx"),
        pathlib.Path("govoplan-calendar/webui/src/features/calendar/CalendarPage.tsx"),
        pathlib.Path("govoplan-files/webui/src/features/files/FilesPage.tsx"),
        pathlib.Path("govoplan-forms/webui/src/features/forms/FormsPage.tsx"),
        pathlib.Path("govoplan-templates/webui/src/features/templates/TemplatesPage.tsx"),
    ),
    "ContentGrid": (
        pathlib.Path("govoplan-core/webui/src/features/settings/SettingsPage.tsx"),
        pathlib.Path("govoplan-campaign/webui/src/features/campaigns/GlobalSettingsPage.tsx"),
        pathlib.Path("govoplan-notifications/webui/src/features/notifications/NotificationSettingsPanel.tsx"),
    ),
    "FormGrid": (
        pathlib.Path("govoplan-core/webui/src/components/mail/MailServerSettingsPanel.tsx"),
        pathlib.Path("govoplan-calendar/webui/src/features/calendar/CalendarEventDialog.tsx"),
        pathlib.Path("govoplan-forms/webui/src/features/forms/FormDefinitionDialog.tsx"),
        pathlib.Path("govoplan-postbox/webui/src/features/postbox/PostboxAdminPanel.tsx"),
    ),
    "FormSection": (
        pathlib.Path("govoplan-addresses/webui/src/features/addressbook/AddressBookPage.tsx"),
        pathlib.Path("govoplan-quick-access/webui/src/features/settings/QuickAccessSettingsPanel.tsx"),
    ),
    "DialogForm": (
        pathlib.Path("govoplan-addresses/webui/src/features/addressbook/AddressBookPage.tsx"),
        pathlib.Path("govoplan-calendar/webui/src/features/calendar/CalendarEventDialog.tsx"),
        pathlib.Path("govoplan-records/webui/src/features/records/RecordsPage.tsx"),
    ),
    "DialogSection": (
        pathlib.Path("govoplan-datasources/webui/src/features/datasources/DatasourcesPage.tsx"),
        pathlib.Path("govoplan-files/webui/src/features/files/components/FileShareDialog.tsx"),
        pathlib.Path("govoplan-templates/webui/src/features/templates/TemplatesPage.tsx"),
    ),
    "DescriptionList": (
        pathlib.Path("govoplan-access/webui/src/features/admin/UsersPanel.tsx"),
        pathlib.Path("govoplan-campaign/webui/src/features/campaigns/CampaignReportPage.tsx"),
        pathlib.Path("govoplan-docs/webui/src/features/docs/DocsPage.tsx"),
        pathlib.Path("govoplan-policy/webui/src/features/policy/ViewPoliciesPanel.tsx"),
    ),
    "MetricGrid": (
        pathlib.Path("govoplan-core/webui/src/features/dashboard/DashboardPage.tsx"),
        pathlib.Path("govoplan-admin/webui/src/features/admin/ModuleManagementPanel.tsx"),
        pathlib.Path("govoplan-campaign/webui/src/features/operator/OperatorQueuePage.tsx"),
        pathlib.Path("govoplan-notifications/webui/src/features/notifications/NotificationSummaryWidget.tsx"),
    ),
}
LEGACY_CSS_SELECTOR = re.compile(
    r"(?<![-\w])\.(?:admin-details-grid|detail-list|metric-grid)(?![-\w])"
)
CSS_BLOCK = re.compile(r"([^{}]+)\{([^{}]*)\}")
CSS_COMMENT = re.compile(r"/\*.*?\*/", re.DOTALL)
DIALOG_CLASS = re.compile(r"\.([A-Za-z0-9_-]*(?:dialog|modal)[A-Za-z0-9_-]*)", re.IGNORECASE)
DIALOG_WIDTH = re.compile(r"(?:^|;)\s*(?:width|max-width)\s*:", re.MULTILINE)
DIALOG_WIDTH_VALUE = re.compile(
    r"(?:^|;)\s*(?:width|max-width)\s*:\s*([^;]+)", re.MULTILINE
)
STANDARD_DIALOG_WIDTH = re.compile(r"\b(?:460|560|680|1040|1440)px\b")
DIALOG_INTERNAL_SUFFIXES = (
    "-actions",
    "-body",
    "-close",
    "-content",
    "-field",
    "-fields",
    "-footer",
    "-form",
    "-header",
    "-title",
)


def source_paths() -> list[pathlib.Path]:
    paths: list[pathlib.Path] = []
    for repository in sorted(REPOS_ROOT.glob("govoplan*")):
        source_root = repository / "webui" / "src"
        if source_root.is_dir():
            paths.extend(sorted(source_root.rglob("*.tsx")))
    return paths


def css_paths() -> list[pathlib.Path]:
    paths: list[pathlib.Path] = []
    for repository in sorted(REPOS_ROOT.glob("govoplan*")):
        source_root = repository / "webui" / "src"
        if source_root.is_dir():
            paths.extend(sorted(source_root.rglob("*.css")))
    return paths


def relative(path: pathlib.Path) -> pathlib.Path:
    return path.relative_to(REPOS_ROOT)


def raw_reason(classes: str) -> str | None:
    tokens = classes.split()
    legacy = sorted(set(tokens) & LEGACY_LAYOUT_TOKENS)
    if legacy:
        return f"legacy shared layout class {', '.join(legacy)}"
    toolbars = [
        token
        for token in tokens
        if token == "admin-toolbar-row" or token.endswith("-toolbar")
    ]
    if toolbars:
        return f"raw toolbar class {', '.join(toolbars)}"
    dialog_forms = [token for token in tokens if token.endswith("dialog-form")]
    if dialog_forms:
        return f"raw dialog form class {', '.join(dialog_forms)}"
    return None


def normalized_css_selector(selector: str) -> str:
    return " ".join(selector.split())


def dialog_width_exceptions(styles: dict[pathlib.Path, str]) -> dict[str, str]:
    exceptions: dict[str, str] = {}
    central_dialog_styles = pathlib.Path("govoplan-core/webui/src/styles/dialogs.css")
    for path, content in styles.items():
        if path == central_dialog_styles:
            continue
        without_comments = CSS_COMMENT.sub("", content)
        for match in CSS_BLOCK.finditer(without_comments):
            selector = normalized_css_selector(match.group(1))
            declarations = match.group(2)
            if not DIALOG_WIDTH.search(declarations):
                continue
            dialog_classes = DIALOG_CLASS.findall(selector)
            if not dialog_classes:
                continue
            if all(name.lower().endswith(DIALOG_INTERNAL_SUFFIXES) for name in dialog_classes):
                continue
            signature = f"{path}|{selector}"
            exceptions[signature] = declarations
    return exceptions


def exception_baseline() -> set[str]:
    if not DIALOG_WIDTH_EXCEPTIONS.exists():
        return set()
    return {
        line.strip()
        for line in DIALOG_WIDTH_EXCEPTIONS.read_text(encoding="utf-8").splitlines()
        if line.strip() and not line.lstrip().startswith("#")
    }


def main() -> int:
    sources = source_paths()
    source_text = {relative(path): path.read_text(encoding="utf-8") for path in sources}
    styles = css_paths()
    style_text = {relative(path): path.read_text(encoding="utf-8") for path in styles}
    errors: list[str] = []

    for path, content in source_text.items():
        for match in RAW_ELEMENT.finditer(content):
            reason = raw_reason(match.group("classes"))
            if reason is None:
                continue
            line = content.count("\n", 0, match.start()) + 1
            errors.append(
                f"Raw {match.group('tag')} repeats shared anatomy ({reason}): {path}:{line}"
            )

    for path, content in style_text.items():
        legacy_match = LEGACY_CSS_SELECTOR.search(CSS_COMMENT.sub("", content))
        if legacy_match:
            line = content.count("\n", 0, legacy_match.start()) + 1
            errors.append(f"Legacy shared layout selector is not allowed: {path}:{line}")

    dialog_exceptions = dialog_width_exceptions(style_text)
    baseline = exception_baseline()
    for signature in sorted(set(dialog_exceptions) - baseline):
        errors.append(f"Unreviewed local dialog width; use Dialog size or register a justified exception: {signature}")
    for signature in sorted(baseline - set(dialog_exceptions)):
        errors.append(f"Stale dialog width exception can be removed: {signature}")
    for signature, declarations in sorted(dialog_exceptions.items()):
        width_values = " ".join(DIALOG_WIDTH_VALUE.findall(declarations))
        standard = STANDARD_DIALOG_WIDTH.search(width_values)
        if standard:
            errors.append(f"Local dialog width duplicates Core size {standard.group(0)}: {signature}")

    for name, owner in CENTRAL_COMPONENTS.items():
        definition = re.compile(
            rf"\b(?:function|class)\s+{name}\b|\bconst\s+{name}\s*="
        )
        for path, content in source_text.items():
            if path != owner and definition.search(content):
                errors.append(f"Module-local {name} definition is not allowed: {path}")

    usage_counts: dict[str, int] = {}
    for name in CENTRAL_COMPONENTS:
        usage = re.compile(rf"<{name}\b")
        usage_counts[name] = sum(bool(usage.search(content)) for content in source_text.values())

    for name, consumers in REQUIRED_CONSUMERS.items():
        for path in consumers:
            absolute = REPOS_ROOT / path
            if not absolute.exists():
                continue
            if f"<{name}" not in absolute.read_text(encoding="utf-8"):
                errors.append(f"Required shared {name} consumer regressed: {path}")

    core_index_path = REPOS_ROOT / CORE_INDEX
    if core_index_path.exists():
        core_index = core_index_path.read_text(encoding="utf-8")
        for name in CENTRAL_COMPONENTS:
            if not re.search(rf"\b{name}\b", core_index):
                errors.append(f"Core must export {name} from @govoplan/core-webui.")

    dialog_path = REPOS_ROOT / "govoplan-core/webui/src/components/Dialog.tsx"
    if dialog_path.exists():
        dialog_text = dialog_path.read_text(encoding="utf-8")
        if "<DialogActions" not in dialog_text:
            errors.append("Every Core Dialog footer must compose DialogActions.")

    if errors:
        print("\n".join(errors), file=sys.stderr)
        return 1

    migrated = ", ".join(
        f"{name}={usage_counts[name]} files"
        for name in ("ActionToolbar", "ContentGrid", "FormGrid", "FormSection", "DialogForm", "DialogSection", "MetricGrid", "DescriptionList")
    )
    print(f"Shared WebUI primitive contract passed: {migrated}; {len(dialog_exceptions)} reviewed dialog width exceptions; no raw legacy anatomy.")
    return 0


if __name__ == "__main__":
    raise SystemExit(main())