#!/usr/bin/env python
#
# A library that provides a Python interface to the Telegram Bot API
# Copyright (C) 2015-2018
# Leandro Toledo de Souza <devs@python-telegram-bot.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser 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 Lesser Public License for more details.
#
# You should have received a copy of the GNU Lesser Public License
# along with this program.  If not, see [http://www.gnu.org/licenses/].
import os
import sys
from collections import defaultdict
from queue import Queue
from threading import Thread, Event
from time import sleep

import pytest

from telegram import Bot
from telegram.ext import Dispatcher, JobQueue
from tests.bots import get_bot

TRAVIS = os.getenv('TRAVIS', False)

if TRAVIS:
    pytest_plugins = ['tests.travis_fold']


@pytest.fixture(scope='session')
def bot_info():
    return get_bot()


@pytest.fixture(scope='session')
def bot(bot_info):
    return Bot(bot_info['token'])


@pytest.fixture(scope='session')
def chat_id(bot_info):
    return bot_info['chat_id']


@pytest.fixture(scope='session')
def group_id(bot_info):
    return bot_info['group_id']


@pytest.fixture(scope='session')
def channel_id(bot_info):
    return bot_info['channel_id']


@pytest.fixture(scope='session')
def provider_token(bot_info):
    return bot_info['payment_provider_token']


def create_dp(bot):
    # Dispatcher is heavy to init (due to many threads and such) so we have a single session
    # scoped one here, but before each test, reset it (dp fixture below)
    dispatcher = Dispatcher(bot, Queue(), job_queue=JobQueue(bot), workers=2)
    thr = Thread(target=dispatcher.start)
    thr.start()
    sleep(2)
    yield dispatcher
    sleep(1)
    if dispatcher.running:
        dispatcher.stop()
    thr.join()


@pytest.fixture(scope='session')
def _dp(bot):
    for dp in create_dp(bot):
        yield dp


@pytest.fixture(scope='function')
def dp(_dp):
    # Reset the dispatcher first
    while not _dp.update_queue.empty():
        _dp.update_queue.get(False)
    _dp.chat_data = defaultdict(dict)
    _dp.user_data = defaultdict(dict)
    _dp.handlers = {}
    _dp.groups = []
    _dp.error_handlers = []
    _dp.__stop_event = Event()
    _dp.__exception_event = Event()
    _dp.__async_queue = Queue()
    _dp.__async_threads = set()
    if _dp._Dispatcher__singleton_semaphore.acquire(blocking=0):
        Dispatcher._set_singleton(_dp)
    yield _dp
    Dispatcher._Dispatcher__singleton_semaphore.release()


def pytest_configure(config):
    if sys.version_info >= (3,):
        config.addinivalue_line('filterwarnings', 'ignore::ResourceWarning')
        # TODO: Write so good code that we don't need to ignore ResourceWarnings anymore