import yaml
import logging
import argparse
import sys
import socket
from os.path import exists
from sim_reader import SIMReader
from connection import ServerConnection

logging.basicConfig(level=logging.DEBUG)
    
if __name__ == "__main__":
    config = None
    sim_readers = []
    parser = argparse.ArgumentParser(description='Communicates with SIM cards using raw tty port')
    parser.add_argument("--config", help="config file to use", type=str, default="config.yaml")
    args = parser.parse_args()

    # Parse config file
    if not exists(args.config):
        print("Config file not found")
        exit(1)
    try:
        with open(args.config, "r") as config_file:
            config = yaml.load(config_file, Loader=yaml.BaseLoader)
    except Exception as err:
        logging.error("Unable to read %s: %s" % (args.config, err))
        sys.exit(1)

    if not "instance" in config:
        config["instance"] = {}
    if not "name" in config["instance"]:
        config["instance"]["name"] = socket.gethostname()
    
    # Create a connection to SIM server
    srv_connection = ServerConnection(
        name=config["instance"]["name"], 
        addr=config["server"]["host"], 
        port=config["server"]["port"], 
        secret=config["server"]["secret"]
    )

    # Open SIM readers
    for port in config['ports']:
        sim = SIMReader(ttyPath=port)
        if sim.ready:
            print("Opened %s. ICCID: %s IMSI: %s" % (port, sim.iccid, sim.imsi))
            srv_connection.send_register(
                iccid=sim.iccid,
                imsi=sim.imsi,
                tty_port=port
            )
            sim.close()