import os
import signal
import sys

import main


def auto_toggle():
    pid_file = "/tmp/simplewhispr.pid"

    if os.path.exists(pid_file):
        with open(pid_file, "r") as f:
            try:
                pid = int(f.read().strip())
                os.kill(pid, signal.SIGUSR1)
                print("info: stopped existing recording.")
            except ProcessLookupError, ValueError:
                print("info: stale pid file found, starting new recording.")
                os.remove(pid_file)
                _fork_and_start()
    else:
        print("info: starting new recording.")
        _fork_and_start()


def _fork_and_start():
    # perform a single fork to detach the process
    try:
        pid = os.fork()
        if pid > 0:
            # parent process exits
            sys.exit(0)
    except OSError as e:
        print(f"fatal: fork failed: {e}")
        sys.exit(1)

    # start the main application
    main.main()


if __name__ == "__main__":
    auto_toggle()