#!/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 re
from queue import Queue

import pytest
from telegram.utils.deprecate import TelegramDeprecationWarning

from telegram import (Message, Update, Chat, Bot, User, CallbackQuery, InlineQuery,
                      ChosenInlineResult, ShippingQuery, PreCheckoutQuery)
from telegram.ext import Filters, MessageHandler, CallbackContext, JobQueue

message = Message(1, User(1, '', False), None, Chat(1, ''), text='Text')

params = [
    {'callback_query': CallbackQuery(1, User(1, '', False), 'chat', message=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 = ('callback_query', 'inline_query', 'chosen_inline_result',
       'shipping_query', 'pre_checkout_query', 'callback_query_without_message')


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


@pytest.fixture(scope='class')
def message(bot):
    return Message(1, User(1, '', False), None, Chat(1, ''), bot=bot)


class TestMessageHandler(object):
    test_flag = False
    SRE_TYPE = type(re.match("", ""))

    @pytest.fixture(autouse=True)
    def reset(self):
        self.test_flag = False

    def callback_basic(self, bot, update):
        test_bot = isinstance(bot, Bot)
        test_update = isinstance(update, Update)
        self.test_flag = test_bot and test_update

    def callback_data_1(self, bot, update, user_data=None, chat_data=None):
        self.test_flag = (user_data is not None) or (chat_data is not None)

    def callback_data_2(self, bot, update, user_data=None, chat_data=None):
        self.test_flag = (user_data is not None) and (chat_data is not None)

    def callback_queue_1(self, bot, update, job_queue=None, update_queue=None):
        self.test_flag = (job_queue is not None) or (update_queue is not None)

    def callback_queue_2(self, bot, update, job_queue=None, update_queue=None):
        self.test_flag = (job_queue is not None) and (update_queue is not None)

    def callback_context(self, update, context):
        self.test_flag = (isinstance(context, CallbackContext)
                          and isinstance(context.bot, Bot)
                          and isinstance(update, Update)
                          and isinstance(context.update_queue, Queue)
                          and isinstance(context.job_queue, JobQueue)
                          and isinstance(context.chat_data, dict)
                          and ((isinstance(context.user_data, dict)
                                and (isinstance(update.message, Message)
                                     or isinstance(update.edited_message, Message)))
                               or (context.user_data is None
                                   and (isinstance(update.channel_post, Message)
                                        or isinstance(update.edited_channel_post, Message)))
                               ))

    def callback_context_regex1(self, update, context):
        if context.matches:
            types = all([type(res) == self.SRE_TYPE for res in context.matches])
            num = len(context.matches) == 1
            self.test_flag = types and num

    def callback_context_regex2(self, update, context):
        if context.matches:
            types = all([type(res) == self.SRE_TYPE for res in context.matches])
            num = len(context.matches) == 2
            self.test_flag = types and num

    def test_basic(self, dp, message):
        handler = MessageHandler(None, self.callback_basic)
        dp.add_handler(handler)

        assert handler.check_update(Update(0, message))
        dp.process_update(Update(0, message))
        assert self.test_flag

    def test_deprecation_warning(self):
        with pytest.warns(TelegramDeprecationWarning, match='See https://git.io/fxJuV'):
            MessageHandler(None, self.callback_basic, edited_updates=True)
        with pytest.warns(TelegramDeprecationWarning, match='See https://git.io/fxJuV'):
            MessageHandler(None, self.callback_basic, message_updates=False)
        with pytest.warns(TelegramDeprecationWarning, match='See https://git.io/fxJuV'):
            MessageHandler(None, self.callback_basic, channel_post_updates=True)

    def test_edited_deprecated(self, message):
        handler = MessageHandler(None, self.callback_basic, edited_updates=True,
                                 message_updates=False, channel_post_updates=False)

        assert handler.check_update(Update(0, edited_message=message))
        assert not handler.check_update(Update(0, message=message))
        assert not handler.check_update(Update(0, channel_post=message))
        assert handler.check_update(Update(0, edited_channel_post=message))

    def test_channel_post_deprecated(self, message):
        handler = MessageHandler(None, self.callback_basic,
                                 edited_updates=False, message_updates=False,
                                 channel_post_updates=True)
        assert not handler.check_update(Update(0, edited_message=message))
        assert not handler.check_update(Update(0, message=message))
        assert handler.check_update(Update(0, channel_post=message))
        assert not handler.check_update(Update(0, edited_channel_post=message))

    def test_multiple_flags_deprecated(self, message):
        handler = MessageHandler(None, self.callback_basic, edited_updates=True,
                                 message_updates=True, channel_post_updates=True)

        assert handler.check_update(Update(0, edited_message=message))
        assert handler.check_update(Update(0, message=message))
        assert handler.check_update(Update(0, channel_post=message))
        assert handler.check_update(Update(0, edited_channel_post=message))

    def test_none_allowed_deprecated(self):
        with pytest.raises(ValueError, match='are all False'):
            MessageHandler(None, self.callback_basic, message_updates=False,
                           channel_post_updates=False, edited_updates=False)

    def test_with_filter(self, message):
        handler = MessageHandler(Filters.group, self.callback_basic)

        message.chat.type = 'group'
        assert handler.check_update(Update(0, message))

        message.chat.type = 'private'
        assert not handler.check_update(Update(0, message))

    def test_specific_filters(self, message):
        f = (~Filters.update.messages
             & ~Filters.update.channel_post
             & Filters.update.edited_channel_post)
        handler = MessageHandler(f, self.callback_basic)

        assert not handler.check_update(Update(0, edited_message=message))
        assert not handler.check_update(Update(0, message=message))
        assert not handler.check_update(Update(0, channel_post=message))
        assert handler.check_update(Update(0, edited_channel_post=message))

    def test_pass_user_or_chat_data(self, dp, message):
        handler = MessageHandler(None, self.callback_data_1,
                                 pass_user_data=True)
        dp.add_handler(handler)

        dp.process_update(Update(0, message=message))
        assert self.test_flag

        dp.remove_handler(handler)
        handler = MessageHandler(None, self.callback_data_1,
                                 pass_chat_data=True)
        dp.add_handler(handler)

        self.test_flag = False
        dp.process_update(Update(0, message=message))
        assert self.test_flag

        dp.remove_handler(handler)
        handler = MessageHandler(None, self.callback_data_2,
                                 pass_chat_data=True, pass_user_data=True)
        dp.add_handler(handler)

        self.test_flag = False
        dp.process_update(Update(0, message=message))
        assert self.test_flag

    def test_pass_job_or_update_queue(self, dp, message):
        handler = MessageHandler(None, self.callback_queue_1,
                                 pass_job_queue=True)
        dp.add_handler(handler)

        dp.process_update(Update(0, message=message))
        assert self.test_flag

        dp.remove_handler(handler)
        handler = MessageHandler(None, self.callback_queue_1,
                                 pass_update_queue=True)
        dp.add_handler(handler)

        self.test_flag = False
        dp.process_update(Update(0, message=message))
        assert self.test_flag

        dp.remove_handler(handler)
        handler = MessageHandler(None, self.callback_queue_2,
                                 pass_job_queue=True, pass_update_queue=True)
        dp.add_handler(handler)

        self.test_flag = False
        dp.process_update(Update(0, message=message))
        assert self.test_flag

    def test_other_update_types(self, false_update):
        handler = MessageHandler(None, self.callback_basic, edited_updates=True)
        assert not handler.check_update(false_update)

    def test_context(self, cdp, message):
        handler = MessageHandler(None, self.callback_context,
                                 edited_updates=True, channel_post_updates=True)
        cdp.add_handler(handler)

        cdp.process_update(Update(0, message=message))
        assert self.test_flag

        self.test_flag = False
        cdp.process_update(Update(0, edited_message=message))
        assert self.test_flag

        self.test_flag = False
        cdp.process_update(Update(0, channel_post=message))
        assert self.test_flag

        self.test_flag = False
        cdp.process_update(Update(0, edited_channel_post=message))
        assert self.test_flag

    def test_context_regex(self, cdp, message):
        handler = MessageHandler(Filters.regex('one two'), self.callback_context_regex1)
        cdp.add_handler(handler)

        message.text = 'not it'
        cdp.process_update(Update(0, message))
        assert not self.test_flag

        message.text += ' one two now it is'
        cdp.process_update(Update(0, message))
        assert self.test_flag

    def test_context_multiple_regex(self, cdp, message):
        handler = MessageHandler(Filters.regex('one') & Filters.regex('two'),
                                 self.callback_context_regex2)
        cdp.add_handler(handler)

        message.text = 'not it'
        cdp.process_update(Update(0, message))
        assert not self.test_flag

        message.text += ' one two now it is'
        cdp.process_update(Update(0, message))
        assert self.test_flag