#!/usr/bin/env python
#
###############################################################################
#   Copyright (C) 2016-2020 Cortney T. Buffington, N0MJS <n0mjs@me.com>
#
#   This program is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation; either version 3 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program; if not, write to the Free Software Foundation,
#   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
###############################################################################

'''
This is a short program that is intended to be used only to validate voice entries
in the voice_lib.py file. It should only be used for building voice libraries and
only used during development to validate the entires.

It uses a number of hard-coded parameters, like the voice files to play back, the
slot, talkgroup, source, etc. of the originating stream.

It is not for novices to use, and should only be used by those comfortable with
how DMR packets are build and Python. It does not handle OpenBridge systems, only
HBP systems, and it is HIGHLY recommended to only use it against a single system 
at a time.

It is a development and debugging tool and has no purpose in actual production
DMR networking systems.
'''


# Python modules we need
from time import sleep
from binascii import b2a_hex as bhex
from threading import Thread

# Twisted is pretty important, so I keep it separate
from twisted.internet.protocol import Factory, Protocol
from twisted.internet import reactor

# Things we import from the main hblink module
from hblink import HBSYSTEM, systems, hblink_handler
from dmr_utils3.utils import bytes_3, bytes_4, int_id
import config
import log
from const import *
from mk_voice import pkt_gen
from voice_lib import words


# REMOVE LATER from datetime import datetime
# The module needs logging, but handlers, etc. are controlled by the parent
import logging
logger = logging.getLogger(__name__)


# Does anybody read this stuff? There's a PEP somewhere that says I should do this.
__author__     = 'Cortney T. Buffington, N0MJS'
__copyright__  = 'Copyright (c) 2016-2019 Cortney T. Buffington, N0MJS and the K0USY Group'
__credits__    = 'Colin Durbridge, G4EML, Steve Zingman, N4IRS; Mike Zingman, N4IRR; Jonathan Naylor, G4KLX; Hans Barthen, DL5DI; Torsten Shultze, DG1HT'
__license__    = 'GNU GPLv3'
__maintainer__ = 'Cort Buffington, N0MJS'
__email__      = 'n0mjs@me.com'

# Module gobal varaibles

class HBP(HBSYSTEM):

    def __init__(self, _name, _config, _report):
        HBSYSTEM.__init__(self, _name, _config, _report)
        self.last_stream = b'\x00'

    def play_voice(self, _rf_src, _tgid, _peer, _slot, _speech):
        speech = pkt_gen(_rf_src, _tgid, _peer, _slot, _speech)

        sleep(1)
        while True:
            try:
                pkt = next(speech)
            except StopIteration:
                break
            sleep(.058)
            self.send_system(pkt)
        return None

    def dmrd_received(self, _peer_id, _rf_src, _dst_id, _seq, _slot, _call_type, _frame_type, _dtype_vseq, _stream_id, _data):
        if (_frame_type == HBPF_DATA_SYNC) and (_dtype_vseq == HBPF_SLT_VTERM) and (_stream_id != self.last_stream):
            self.last_stream = _stream_id
            
            feedback = Thread(target=self.play_voice(bytes_3(3120102), bytes_3(2), bytes_4(3120119), 0, [words['connected'], words['kansas_link']]))
            feedback.start()


#************************************************
#      MAIN PROGRAM LOOP STARTS HERE
#************************************************

if __name__ == '__main__':

    import argparse
    import sys
    import os
    import signal

    # Change the current directory to the location of the application
    os.chdir(os.path.dirname(os.path.realpath(sys.argv[0])))

    # CLI argument parser - handles picking up the config file from the command line, and sending a "help" message
    parser = argparse.ArgumentParser()
    parser.add_argument('-c', '--config', action='store', dest='CONFIG_FILE', help='/full/path/to/config.file (usually hblink.cfg)')
    parser.add_argument('-l', '--logging', action='store', dest='LOG_LEVEL', help='Override config file logging level.')
    cli_args = parser.parse_args()

    # Ensure we have a path for the config file, if one wasn't specified, then use the default (top of file)
    if not cli_args.CONFIG_FILE:
        cli_args.CONFIG_FILE = os.path.dirname(os.path.abspath(__file__))+'/hblink.cfg'

    # Call the external routine to build the configuration dictionary
    CONFIG = config.build_config(cli_args.CONFIG_FILE)

    # Start the system logger
    if cli_args.LOG_LEVEL:
        CONFIG['LOGGER']['LOG_LEVEL'] = cli_args.LOG_LEVEL
    logger = log.config_logging(CONFIG['LOGGER'])
    logger.info('\n\nCopyright (c) 2013, 2014, 2015, 2016, 2018, 2019\n\tThe Regents of the K0USY Group. All rights reserved.\n')
    logger.debug('(GLOBAL) Logging system started, anything from here on gets logged')

    # Set up the signal handler
    def sig_handler(_signal, _frame):
        logger.info('(GLOBAL) SHUTDOWN: CONFBRIDGE IS TERMINATING WITH SIGNAL %s', str(_signal))
        hblink_handler(_signal, _frame)
        logger.info('(GLOBAL) SHUTDOWN: ALL SYSTEM HANDLERS EXECUTED - STOPPING REACTOR')
        reactor.stop()

    # Set signal handers so that we can gracefully exit if need be
    for sig in [signal.SIGINT, signal.SIGTERM]:
        signal.signal(sig, sig_handler)

    # INITIALIZE THE REPORTING LOOP
    report_server = None

    # HBlink instance creation
    logger.info('(GLOBAL) HBlink \'bridge.py\' -- SYSTEM STARTING...')
    for system in CONFIG['SYSTEMS']:
        if CONFIG['SYSTEMS'][system]['ENABLED']:
            if CONFIG['SYSTEMS'][system]['MODE'] == 'MASTER' or CONFIG['SYSTEMS'][system]['MODE'] == 'PEER':
                systems[system] = HBP(system, CONFIG, report_server)
            reactor.listenUDP(CONFIG['SYSTEMS'][system]['PORT'], systems[system], interface=CONFIG['SYSTEMS'][system]['IP'])
            logger.debug('(GLOBAL) %s instance created: %s, %s', CONFIG['SYSTEMS'][system]['MODE'], system, systems[system])

    def loopingErrHandle(failure):
        logger.error('(GLOBAL) STOPPING REACTOR TO AVOID MEMORY LEAK: Unhandled error in timed loop.\n %s', failure)
        reactor.stop()

    reactor.run()