#!/usr/bin/env python3

import nilmrun.server
import argparse
import os
import socket

def main():
    """Main entry point for the 'nilmrun-server' command line script"""

    parser = argparse.ArgumentParser(
        description = 'Run the NilmRun server',
        formatter_class = argparse.ArgumentDefaultsHelpFormatter)
    parser.add_argument("-v", "--version", action="version",
                        version=nilmrun.__version__)

    group = parser.add_argument_group("Standard options")
    group.add_argument('-a', '--address',
                       help = 'Only listen on the given address',
                       default = '0.0.0.0')
    group.add_argument('-p', '--port', help = 'Listen on the given port',
                       type = int, default = 12381)
    group.add_argument('-q', '--quiet', help = 'Silence output',
                       action = 'store_true')
    group.add_argument('-t', '--traceback',
                       help = 'Provide tracebacks in client errors',
                       action = 'store_true', default = False)

    args = parser.parse_args()

    # Configure the server
    if args.quiet:
        embedded = True
    else:
        embedded = False
    server = nilmrun.server.Server(host = args.address,
                                   port = args.port,
                                   force_traceback = args.traceback)

    # Print info
    if not args.quiet:
        print("NilmRun version: %s" % nilmrun.__version__)
        print(("Note: This server does not do any authentication! " +
               "Anyone who can connect can run arbitrary commands."))
        if args.address == '0.0.0.0' or args.address == '::':
            host = socket.getfqdn()
        else:
            host = args.address
        print("Server URL: http://%s:%d/" % ( host, args.port))
        print("----")

    server.start(blocking = True)

    if not args.quiet:
        print("Shutting down")

if __name__ == "__main__":
    main()