import argparse
import json
import logging
import sys

from .app import DEFAULT_CONFIG, LOG, CameraControlBridge, load_config_or_env


def main(argv=None):
    parser = argparse.ArgumentParser()
    parser.add_argument("--config", default=DEFAULT_CONFIG)
    parser.add_argument("--serve", action="store_true")
    parser.add_argument("--list", action="store_true")
    parser.add_argument("--check", action="store_true")
    parser.add_argument("--publish-discovery", action="store_true")
    parser.add_argument("--action", metavar="ID")
    parser.add_argument("command", nargs="?")
    parser.add_argument("--all-off", action="store_true")
    args = parser.parse_args(argv)

    logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)s %(message)s")
    bridge = CameraControlBridge(load_config_or_env(args.config))

    if args.list:
        bridge.list_actions()
        return 0
    if args.check:
        return bridge.check()
    if args.all_off:
        print(json.dumps(bridge.all_off(), indent=2))
        return 0
    if args.action:
        if not args.command:
            print("missing command", file=sys.stderr)
            return 2
        print(json.dumps(bridge.execute_action(args.action, args.command, publish=False), indent=2))
        return 0
    if args.publish_discovery:
        for credential in bridge.credentials:
            try:
                bridge.mqtt.connect(credential.get("username"), credential.get("password"))
                bridge.publish_discovery()
                bridge.mqtt.disconnect_cleanly()
                return 0
            except Exception as exc:
                LOG.warning("publish discovery failed using %s: %s", credential["source"], exc)
        return 1

    bridge.serve()
    return 0