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

import argparse
import json
from pathlib import Path

from app.main import app


TARGET = Path(__file__).with_name("openapi.json")


def rendered_contract() -> str:
    return json.dumps(app.openapi(), ensure_ascii=False, indent=2, sort_keys=True) + "\n"


def main() -> int:
    parser = argparse.ArgumentParser(description="Generate or verify the RF4 Spotter OpenAPI contract")
    parser.add_argument("--check", action="store_true")
    args = parser.parse_args()
    rendered = rendered_contract()
    if args.check:
        if not TARGET.exists() or TARGET.read_text(encoding="utf-8") != rendered:
            parser.exit(1, "OpenAPI contract is stale; run apps/api/export_openapi.py\n")
        print(f"OpenAPI contract is current: {len(app.openapi()['paths'])} paths")
        return 0
    TARGET.write_text(rendered, encoding="utf-8")
    print(f"Wrote {TARGET}: {len(app.openapi()['paths'])} paths")
    return 0


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