#!/usr/bin/env python3
"""Проверка: UI-статика не тянет ресурсы с CDN (fonts.gstatic, jsdelivr и т.д.)."""

from __future__ import annotations

import re
import sys
from pathlib import Path

ROOT = Path(__file__).resolve().parent.parent
STATIC = ROOT / "static"
TEMPLATES = ROOT / "templates"

CDN_IN_CSS = re.compile(r"url\s*\(\s*['\"]?https?://", re.I)
CDN_IN_HTML = re.compile(
    r"""(?:src|href)\s*=\s*['"]https?://""",
    re.I,
)

REQUIRED_FILES = [
    "js/chart.umd.min.js",
    "js/wesp-zootech-icons.js",
    "icons/route-location.svg",
    "icons/cow.svg",
    "css/inter-fonts.css",
    "css/roboto-fonts.css",
    "css/font-awesome.min.css",
    "fonts/inter/inter-400.ttf",
    "fonts/inter/inter-700.ttf",
    "fonts/roboto/roboto-400.ttf",
    "webfonts/fa-solid-900.woff2",
    "webfonts/fa-solid-900.ttf",
]


def _scan_css(path: Path) -> list[str]:
    text = path.read_text(encoding="utf-8", errors="replace")
    issues: list[str] = []
    for i, line in enumerate(text.splitlines(), 1):
        if CDN_IN_CSS.search(line):
            issues.append(f"{path.relative_to(ROOT)}:{i}: external url() in CSS")
    return issues


def _scan_html(path: Path) -> list[str]:
    text = path.read_text(encoding="utf-8", errors="replace")
    issues: list[str] = []
    for i, line in enumerate(text.splitlines(), 1):
        if CDN_IN_HTML.search(line):
            issues.append(f"{path.relative_to(ROOT)}:{i}: external src/href in HTML")
    return issues


def main() -> int:
    issues: list[str] = []

    for rel in REQUIRED_FILES:
        if not (STATIC / rel).is_file():
            issues.append(f"missing required static file: static/{rel}")

    css_dirs = [STATIC / "css", STATIC / "vendor"]
    for css_dir in css_dirs:
        if not css_dir.is_dir():
            continue
        for path in sorted(css_dir.rglob("*.css")):
            issues.extend(_scan_css(path))

    for html_root in (STATIC, TEMPLATES):
        if not html_root.is_dir():
            continue
        for path in sorted(html_root.rglob("*.html")):
            issues.extend(_scan_html(path))

    if issues:
        print("verify_static_offline_assets: FAILED", file=sys.stderr)
        for item in issues:
            print(f"  - {item}", file=sys.stderr)
        return 1

    print("verify_static_offline_assets: OK")
    return 0


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