#!/usr/bin/env python
# vim: expandtab sw=4 ts=4 sts=4:
#
# Copyright © 2003 - 2018 Michal Čihař <michal@cihar.com>
#
# This file is part of python-gammu <https://wammu.eu/python-gammu/>
#
# 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 2 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.
#
"""
Service numbers dialogue example.
"""


import sys

import gammu

REPLY = False


def callback(state_machine, callback_type, data):
    """
    Callback on USSD data.
    """
    global REPLY
    if callback_type != "USSD":
        print(f"Unexpected event type: {callback_type}")
        sys.exit(1)

    REPLY = True

    print("Network reply:")
    print("Status: {}".format(data["Status"]))
    print(data["Text"])

    if data["Status"] == "ActionNeeded":
        do_service(state_machine)


def init():
    """
    Intializes gammu and callbacks.
    """
    state_machine = gammu.StateMachine()
    if len(sys.argv) >= 2:
        state_machine.ReadConfig(Filename=sys.argv[1])
    else:
        state_machine.ReadConfig()
    state_machine.Init()
    state_machine.SetIncomingCallback(callback)
    try:
        state_machine.SetIncomingUSSD()
    except gammu.ERR_NOTSUPPORTED:
        print("Incoming USSD notification is not supported.")
        sys.exit(1)
    return state_machine


def do_service(state_machine):
    """
    Main code to talk with worker.
    """
    global REPLY

    if len(sys.argv) >= 3:
        code = sys.argv[2]
        del sys.argv[2]
    else:
        prompt = "Enter code (empty string to end): "
        try:
            code = raw_input(prompt)
        except NameError:
            code = input(prompt)
    if code != "":
        print("Talking to network...")
        REPLY = False
        state_machine.DialService(code)
        loops = 0
        while not REPLY and loops < 10:
            state_machine.ReadDevice()
            loops += 1


def main():
    state_machine = init()
    print("This example shows interaction with network using service codes")
    do_service(state_machine)


if __name__ == "__main__":
    main()