import os
from http.server import ThreadingHTTPServer

from amc_server.context import DATA_DIR, PORT, generate_auth_token, start_projects_watcher
from amc_server.handler import AMCHandler
from amc_server.logging_utils import LOGGER, configure_logging, install_signal_handlers
from amc_server.mixins.spawn import load_projects_cache


def main():
    configure_logging()
    DATA_DIR.mkdir(parents=True, exist_ok=True)
    LOGGER.info("Starting AMC server")

    # Initialize spawn feature
    load_projects_cache()
    generate_auth_token()
    start_projects_watcher()

    server = ThreadingHTTPServer(("127.0.0.1", PORT), AMCHandler)
    install_signal_handlers(server)
    LOGGER.info("AMC server listening on http://127.0.0.1:%s", PORT)

    # Write PID file
    pid_file = DATA_DIR / "server.pid"
    pid_file.write_text(str(os.getpid()))

    try:
        server.serve_forever()
    except KeyboardInterrupt:
        LOGGER.info("AMC server interrupted; shutting down")
    except Exception:
        LOGGER.exception("AMC server crashed")
        raise
    finally:
        pid_file.unlink(missing_ok=True)
        server.server_close()
        LOGGER.info("AMC server stopped")