#!/usr/bin/env python3
from __future__ import annotations

import argparse
import json
import subprocess
import sys
import tempfile
from pathlib import Path

ROOT = Path(__file__).resolve().parents[1]
sys.path.insert(0, str(ROOT / "renderer"))

from app.renderer import render_documents
from app.validation import validate_report


def main() -> int:
    parser = argparse.ArgumentParser(description="Render a report with a locally installed Chromium.")
    parser.add_argument("input", type=Path)
    parser.add_argument("output", type=Path)
    parser.add_argument("--chromium", default="chromium")
    args = parser.parse_args()

    payload = json.loads(args.input.read_text(encoding="utf-8"))
    errors = validate_report(payload)
    if errors:
        print(json.dumps(errors, ensure_ascii=False, indent=2), file=sys.stderr)
        return 2

    html, _ = render_documents(payload)
    args.output.parent.mkdir(parents=True, exist_ok=True)

    with tempfile.TemporaryDirectory() as tmp:
        html_path = Path(tmp) / "index.html"
        html_path.write_text(html, encoding="utf-8")
        subprocess.run([
            args.chromium,
            "--headless",
            "--no-sandbox",
            "--disable-gpu",
            "--disable-dev-shm-usage",
            f"--print-to-pdf={args.output.resolve()}",
            "--print-to-pdf-no-header",
            html_path.resolve().as_uri(),
        ], check=True)

    print(args.output)
    return 0


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