#!/usr/bin/python

import os
import sys
import socket
import argparse

import cherrypy

import nilmdb.server


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

    parser = argparse.ArgumentParser(
        description='Run the NilmDB server',
        formatter_class=argparse.ArgumentDefaultsHelpFormatter)

    parser.add_argument("-v", "--version", action="version",
                        version=nilmdb.__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=12380)
    group.add_argument('-d', '--database', help='Database directory',
                       default="./db")
    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)

    group = parser.add_argument_group("Debug options")
    group.add_argument('-y', '--yappi', help='Run under yappi profiler and '
                       'invoke interactive shell afterwards',
                       action='store_true')

    args = parser.parse_args()

    # Create database object.  Needs to be serialized before passing
    # to the Server.
    db = nilmdb.utils.serializer_proxy(nilmdb.server.NilmDB)(args.database)

    # Configure the server
    if not args.quiet:
        cherrypy._cpconfig.environments['embedded']['log.screen'] = True

    server = nilmdb.server.Server(db,
                                  host=args.address,
                                  port=args.port,
                                  force_traceback=args.traceback)

    # Print info
    if not args.quiet:
        print("Version: %s" % nilmdb.__version__)
        print("Database: %s" % (os.path.realpath(args.database)))
        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("----")

    # Run it
    try:
        if args.yappi:
            print("Running in yappi")
            try:
                import yappi
                yappi.start()
                server.start(blocking=True)
            finally:
                yappi.stop()
                stats = yappi.get_func_stats()
                stats.sort("ttot")
                stats.print_all()
                from IPython import embed
                embed(header="Use the `yappi` or `stats` object to explore "
                      "further, quit to exit")
        else:
            server.start(blocking=True)
    except nilmdb.server.serverutil.CherryPyExit:
        print("Exiting due to CherryPy error", file=sys.stderr)
        raise
    finally:
        if not args.quiet:
            print("Closing database")
            db.close()


if __name__ == "__main__":
    main()