#!/usr/bin/env python
#
# A library that provides a Python interface to the Telegram Bot API
# Copyright (C) 2015-2020
# 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 datetime
import os
import re
from collections import defaultdict
from queue import Queue
from threading import Thread, Event
from time import sleep

import pytest
import pytz

from telegram import (
    Bot,
    Message,
    User,
    Chat,
    MessageEntity,
    Update,
    InlineQuery,
    CallbackQuery,
    ShippingQuery,
    PreCheckoutQuery,
    ChosenInlineResult,
)
from telegram.ext import Dispatcher, JobQueue, Updater, MessageFilter, Defaults, UpdateFilter
from telegram.error import BadRequest
from tests.bots import get_bot

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

if GITHUB_ACTION:
    pytest_plugins = ['tests.plugin_github_group']

# THIS KEY IS OBVIOUSLY COMPROMISED
# DO NOT USE IN PRODUCTION!
PRIVATE_KEY = b"-----BEGIN RSA PRIVATE KEY-----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\r\nP8IHY6009aoamLqYaexvrkHVq7fFKiI6k8myMJ6qblVNFv14+KXU\r\n-----END RSA PRIVATE KEY-----"  # noqa: E501


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


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


DEFAULT_BOTS = {}


@pytest.fixture(scope='function')
def default_bot(request, bot_info):
    param = request.param if hasattr(request, 'param') else {}

    defaults = Defaults(**param)
    default_bot = DEFAULT_BOTS.get(defaults)
    if default_bot:
        return default_bot
    else:
        default_bot = make_bot(bot_info, **{'defaults': defaults})
        DEFAULT_BOTS[defaults] = default_bot
        return default_bot


@pytest.fixture(scope='function')
def tz_bot(timezone, bot_info):
    defaults = Defaults(tzinfo=timezone)
    default_bot = DEFAULT_BOTS.get(defaults)
    if default_bot:
        return default_bot
    else:
        default_bot = make_bot(bot_info, **{'defaults': defaults})
        DEFAULT_BOTS[defaults] = default_bot
        return default_bot


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


@pytest.fixture(scope='session')
def super_group_id(bot_info):
    return bot_info['super_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(), workers=2, use_context=False)
    dispatcher.job_queue.set_dispatcher(dispatcher)
    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.bot_data = {}
    _dp.persistence = None
    _dp.handlers = {}
    _dp.groups = []
    _dp.error_handlers = {}
    _dp.__stop_event = Event()
    _dp.__exception_event = Event()
    _dp.__async_queue = Queue()
    _dp.__async_threads = set()
    _dp.persistence = None
    _dp.use_context = False
    if _dp._Dispatcher__singleton_semaphore.acquire(blocking=0):
        Dispatcher._set_singleton(_dp)
    yield _dp
    Dispatcher._Dispatcher__singleton_semaphore.release()


@pytest.fixture(scope='function')
def cdp(dp):
    dp.use_context = True
    yield dp
    dp.use_context = False


@pytest.fixture(scope='function')
def updater(bot):
    up = Updater(bot=bot, workers=2, use_context=False)
    yield up
    if up.running:
        up.stop()


@pytest.fixture(scope='function')
def thumb_file():
    f = open(u'tests/data/thumb.jpg', 'rb')
    yield f
    f.close()


@pytest.fixture(scope='class')
def class_thumb_file():
    f = open(u'tests/data/thumb.jpg', 'rb')
    yield f
    f.close()


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


def make_bot(bot_info, **kwargs):
    return Bot(bot_info['token'], private_key=PRIVATE_KEY, **kwargs)


CMD_PATTERN = re.compile(r'/[\da-z_]{1,32}(?:@\w{1,32})?')
DATE = datetime.datetime.now()


def make_message(text, **kwargs):
    """
    Testing utility factory to create a fake ``telegram.Message`` with
    reasonable defaults for mimicking a real message.
    :param text: (str) message text
    :return: a (fake) ``telegram.Message``
    """
    return Message(
        message_id=1,
        from_user=kwargs.pop('user', User(id=1, first_name='', is_bot=False)),
        date=kwargs.pop('date', DATE),
        chat=kwargs.pop('chat', Chat(id=1, type='')),
        text=text,
        bot=kwargs.pop('bot', make_bot(get_bot())),
        **kwargs,
    )


def make_command_message(text, **kwargs):
    """
    Testing utility factory to create a message containing a single telegram
    command.
    Mimics the Telegram API in that it identifies commands within the message
    and tags the returned ``Message`` object with the appropriate ``MessageEntity``
    tag (but it does this only for commands).

    :param text: (str) message text containing (or not) the command
    :return: a (fake) ``telegram.Message`` containing only the command
    """

    match = re.search(CMD_PATTERN, text)
    entities = (
        [
            MessageEntity(
                type=MessageEntity.BOT_COMMAND, offset=match.start(0), length=len(match.group(0))
            )
        ]
        if match
        else []
    )

    return make_message(text, entities=entities, **kwargs)


def make_message_update(message, message_factory=make_message, edited=False, **kwargs):
    """
    Testing utility factory to create an update from a message, as either a
    ``telegram.Message`` or a string. In the latter case ``message_factory``
    is used to convert ``message`` to a ``telegram.Message``.
    :param message: either a ``telegram.Message`` or a string with the message text
    :param message_factory: function to convert the message text into a ``telegram.Message``
    :param edited: whether the message should be stored as ``edited_message`` (vs. ``message``)
    :return: ``telegram.Update`` with the given message
    """
    if not isinstance(message, Message):
        message = message_factory(message, **kwargs)
    update_kwargs = {'message' if not edited else 'edited_message': message}
    return Update(0, **update_kwargs)


def make_command_update(message, edited=False, **kwargs):
    """
    Testing utility factory to create an update from a message that potentially
    contains a command. See ``make_command_message`` for more details.
    :param message: message potentially containing a command
    :param edited: whether the message should be stored as ``edited_message`` (vs. ``message``)
    :return: ``telegram.Update`` with the given message
    """
    return make_message_update(message, make_command_message, edited, **kwargs)


@pytest.fixture(
    scope='class',
    params=[{'class': MessageFilter}, {'class': UpdateFilter}],
    ids=['MessageFilter', 'UpdateFilter'],
)
def mock_filter(request):
    class MockFilter(request.param['class']):
        def __init__(self):
            self.tested = False

        def filter(self, _):
            self.tested = True

    return MockFilter()


def get_false_update_fixture_decorator_params():
    message = Message(1, DATE, Chat(1, ''), from_user=User(1, '', False), text='test')
    params = [
        {'callback_query': CallbackQuery(1, User(1, '', False), 'chat', message=message)},
        {'channel_post': message},
        {'edited_channel_post': message},
        {'inline_query': InlineQuery(1, User(1, '', False), '', '')},
        {'chosen_inline_result': ChosenInlineResult('id', User(1, '', False), '')},
        {'shipping_query': ShippingQuery('id', User(1, '', False), '', None)},
        {'pre_checkout_query': PreCheckoutQuery('id', User(1, '', False), '', 0, '')},
        {'callback_query': CallbackQuery(1, User(1, '', False), 'chat')},
    ]
    ids = tuple(key for kwargs in params for key in kwargs)
    return {'params': params, 'ids': ids}


@pytest.fixture(scope='function', **get_false_update_fixture_decorator_params())
def false_update(request):
    return Update(update_id=1, **request.param)


@pytest.fixture(params=['Europe/Berlin', 'Asia/Singapore', 'UTC'])
def tzinfo(request):
    return pytz.timezone(request.param)


@pytest.fixture()
def timezone(tzinfo):
    return tzinfo


def expect_bad_request(func, message, reason):
    """
    Wrapper for testing bot functions expected to result in an :class:`telegram.error.BadRequest`.
    Makes it XFAIL, if the specified error message is present.

    Args:
        func: The callable to be executed.
        message: The expected message of the bad request error. If another message is present,
            the error will be reraised.
        reason: Explanation for the XFAIL.

    Returns:
        On success, returns the return value of :attr:`func`
    """
    try:
        return func()
    except BadRequest as e:
        if message in str(e):
            pytest.xfail(f'{reason}. {e}')
        else:
            raise e