"""Check one edited repository file without executing its contents."""

import json
import subprocess
import sys
from pathlib import Path


PROJECT_ROOT = Path(__file__).resolve().parents[2]
CHECK_TIMEOUT = 10


def check_file(file_path: str, project_dir: Path) -> None:
    project_dir = project_dir.resolve()
    path = Path(file_path)
    if not path.is_absolute():
        path = project_dir / path
    path = path.resolve()
    try:
        relative = path.relative_to(project_dir)
    except ValueError:
        return

    if path.suffix == ".py":
        compile(path.read_bytes(), str(path), "exec")
        return

    if path.suffix == ".sh" and relative.parts[:2] == ("scripts", "server"):
        command = ["bash", "-n", str(path)]
    elif path.suffix == ".sh" and (
        relative.parts[:2] == ("scripts", "router")
        or relative == Path("build_router_package.sh")
    ):
        command = ["sh", "-n", str(path)]
    elif path.suffix == ".js" and relative.parts[:1] == ("substore",):
        command = ["node", "--check", str(path)]
    else:
        return

    result = subprocess.run(
        command,
        cwd=str(project_dir),
        capture_output=True,
        text=True,
        timeout=CHECK_TIMEOUT,
    )
    if result.returncode:
        detail = result.stderr.strip() or result.stdout.strip()
        raise RuntimeError(detail or f"{command[0]} exited with status {result.returncode}")


def main() -> int:
    try:
        payload = json.load(sys.stdin)
        if not isinstance(payload, dict):
            raise ValueError("Hook payload must be a JSON object")
        if payload.get("tool_name") not in ("Write", "Edit"):
            return 0
        tool_input = payload.get("tool_input")
        if not isinstance(tool_input, dict):
            raise ValueError("Write/Edit payload must contain tool_input")
        file_path = tool_input.get("file_path")
        if not isinstance(file_path, str) or not file_path:
            raise ValueError("Write/Edit payload must contain a nonempty file_path")
        check_file(file_path, PROJECT_ROOT)
    except (OSError, SyntaxError, ValueError, RuntimeError, subprocess.TimeoutExpired) as exc:
        print(f"[syntax-check] {exc}", file=sys.stderr)
        return 2
    return 0


if __name__ == "__main__":
    sys.exit(main())