"""Download pinned mermaid.min.js into md2gost/diagrams (for offline browser render)."""

from __future__ import annotations

import sys
from pathlib import Path

import requests

ROOT = Path(__file__).resolve().parents[1]
DEST = ROOT / "md2gost" / "diagrams" / "mermaid.min.js"
MERMAID_VERSION = "11.4.1"
URL = f"https://cdn.jsdelivr.net/npm/mermaid@{MERMAID_VERSION}/dist/mermaid.min.js"


def main() -> int:
    DEST.parent.mkdir(parents=True, exist_ok=True)
    print(f"Скачиваю Mermaid {MERMAID_VERSION} → {DEST}")
    try:
        resp = requests.get(URL, timeout=120)
        resp.raise_for_status()
        if len(resp.content) < 100_000:
            print("Слишком маленький ответ — не похоже на mermaid.min.js", file=sys.stderr)
            return 1
        DEST.write_bytes(resp.content)
    except Exception as exc:
        print(f"Ошибка: {exc}", file=sys.stderr)
        return 1
    print(f"OK ({DEST.stat().st_size} bytes)")
    return 0


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