#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-3.0-or-later
"""Generate the C X-macro list from the read-only JSON manifest."""

from __future__ import annotations

import argparse
import json
from pathlib import Path


def render(manifest_path: Path) -> str:
    manifest = json.loads(manifest_path.read_text(encoding="utf-8"))
    symbols = manifest["symbols"]
    lines = ["/* Generated from manifests/ps5_gnm_symbols.json. Do not edit. */"]
    lines.extend(f'CHIMERA_GNM_SYMBOL("{entry["name"]}")' for entry in symbols)
    return "\n".join(lines) + "\n"


def main() -> int:
    parser = argparse.ArgumentParser()
    parser.add_argument("--manifest", type=Path, required=True)
    parser.add_argument("--output", type=Path, required=True)
    parser.add_argument("--check", action="store_true")
    args = parser.parse_args()

    expected = render(args.manifest)
    if args.check:
        if not args.output.exists() or args.output.read_text(encoding="utf-8") != expected:
            print(f"stale generated file: {args.output}")
            return 1
        print(f"generated file is current: {args.output}")
        return 0

    args.output.parent.mkdir(parents=True, exist_ok=True)
    args.output.write_text(expected, encoding="utf-8", newline="\n")
    return 0


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