#!/usr/bin/env python3
"""Bounded Apple toolchain probes; never install components or change the host."""
import subprocess
import sys


def probe(command, timeout=60):
    label = " ".join(command)
    print(f"Runner prerequisite: checking {label} (timeout {timeout}s)", flush=True)
    try:
        result = subprocess.run(command, capture_output=True, text=True, timeout=timeout, check=False)
    except subprocess.TimeoutExpired as error:
        raise RuntimeError(
            f"{label} did not return within {timeout}s. Check selected Xcode, first-launch components "
            "and CoreSimulator in the runner user's interactive login session; run this command there. "
            "CI has not accepted licenses or changed host settings."
        ) from error
    except OSError as error:
        raise RuntimeError(f"Cannot start {label}: {error}") from error
    if result.returncode:
        raise RuntimeError(f"{label} exited {result.returncode}: {(result.stderr or result.stdout).strip()}")
    return result.stdout


def main():
    try:
        print(probe(["xcodebuild", "-version"]).strip(), flush=True)
        probe(["xcrun", "--find", "swift"])
        probe(["xcrun", "simctl", "list", "devices", "available"])
    except RuntimeError as error:
        print(f"Runner prerequisite: {error}", file=sys.stderr)
        return 1
    return 0


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