#!python3

import argparse
from . import StreamInterface, test
import logging
import sys
from pubsub import pub
import google.protobuf.json_format

"""The command line arguments"""
args = None


def onReceive(packet):
    """Callback invoked when a packet arrives"""
    print(f"Received: {packet}")


def onConnection(interface, topic=pub.AUTO_TOPIC):
    """Callback invoked when we connect/disconnect from a radio"""
    print(f"Connection changed: {topic.getName()}")
    global args
    if topic.getName() == "meshtastic.connection.established":
        try:
            if args.setpref:
                name = args.setpref[0]
                val = int(args.setpref[1])
                setattr(interface.radioConfig.preferences, name, val)
                print("Writing modified preferences to device...")
                interface.writeConfig()

            if args.info:
                print(interface.myInfo)
                print(interface.radioConfig)
                print("Nodes in mesh:")
                for n in interface.nodes.values():
                    asDict = google.protobuf.json_format.MessageToJson(n)
                    print(asDict)
        except Exception as ex:
            print(ex)

        if args.info or args.setpref:
            interface.close()  # after running command then exit


def onNode(node):
    """Callback invoked when the node DB changes"""
    print(f"Node changed: {node}")


def subscribe():
    """Subscribe to the topics the user probably wants to see, prints output to stdout"""
    pub.subscribe(onReceive, "meshtastic.receive")
    pub.subscribe(onConnection, "meshtastic.connection")
    pub.subscribe(onNode, "meshtastic.node")


def main():
    """Perform command line meshtastic operations"""
    parser = argparse.ArgumentParser()

    parser.add_argument(
        "--device",
        help="The port the Meshtastic device is connected to, i.e. /dev/ttyUSB0. If unspecified, we'll try to find it.",
        default=None)

    parser.add_argument(
        "--seriallog",
        help="Log device serial output to either 'stdout', 'none' or a filename to append to.  Defaults to stdout.",
        default="stdout")

    parser.add_argument("--info", help="Read and display the radio config information",
                        action="store_true")

    parser.add_argument("--setpref", help="Set a preferences field", nargs=2)

    parser.add_argument("--debug", help="Show API library debug log messages",
                        action="store_true")

    parser.add_argument("--test", help="Run stress test against all connected Meshtastic devices",
                        action="store_true")

    global args
    args = parser.parse_args()
    logging.basicConfig(level=logging.DEBUG if args.debug else logging.INFO)

    if args.info or args.setpref:
        args.seriallog = "none"  # assume no debug output in this case

    if args.test:
        test.testAll()
    else:
        if args.seriallog == "stdout":
            logfile = sys.stdout
        elif args.seriallog == "none":
            logging.debug("Not logging serial output")
            logfile = None
        else:
            logging.info(f"Logging serial output to {args.seriallog}")
            logfile = open(args.seriallog, 'w+', buffering=1)  # line buffering

        subscribe()
        client = StreamInterface(args.device, debugOut=logfile)


if __name__ == "__main__":
    main()