#!/usr/bin/env python
# A library that provides a Python interface to the Telegram Bot API
# Copyright (C) 2015-2023
# 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/].
from datetime import datetime, timedelta, timezone

import pytest

from telegram import Chat, MessageEntity, Poll, PollAnswer, PollOption, User
from telegram._utils.datetime import UTC, to_timestamp
from telegram.constants import PollType
from telegram.warnings import PTBDeprecationWarning
from tests.auxil.slots import mro_slots


@pytest.fixture(scope="module")
def poll_option():
    out = PollOption(text=TestPollOptionBase.text, voter_count=TestPollOptionBase.voter_count)
    out._unfreeze()
    return out


class TestPollOptionBase:
    text = "test option"
    voter_count = 3


class TestPollOptionWithoutRequest(TestPollOptionBase):
    def test_slot_behaviour(self, poll_option):
        for attr in poll_option.__slots__:
            assert getattr(poll_option, attr, "err") != "err", f"got extra slot '{attr}'"
        assert len(mro_slots(poll_option)) == len(set(mro_slots(poll_option))), "duplicate slot"

    def test_de_json(self):
        json_dict = {"text": self.text, "voter_count": self.voter_count}
        poll_option = PollOption.de_json(json_dict, None)
        assert poll_option.api_kwargs == {}

        assert poll_option.text == self.text
        assert poll_option.voter_count == self.voter_count

    def test_to_dict(self, poll_option):
        poll_option_dict = poll_option.to_dict()

        assert isinstance(poll_option_dict, dict)
        assert poll_option_dict["text"] == poll_option.text
        assert poll_option_dict["voter_count"] == poll_option.voter_count

    def test_equality(self):
        a = PollOption("text", 1)
        b = PollOption("text", 1)
        c = PollOption("text_1", 1)
        d = PollOption("text", 2)
        e = Poll(123, "question", ["O1", "O2"], 1, False, True, Poll.REGULAR, True)

        assert a == b
        assert hash(a) == hash(b)

        assert a != c
        assert hash(a) != hash(c)

        assert a != d
        assert hash(a) != hash(d)

        assert a != e
        assert hash(a) != hash(e)


@pytest.fixture(scope="module")
def poll_answer():
    return PollAnswer(
        TestPollAnswerBase.poll_id,
        TestPollAnswerBase.option_ids,
        TestPollAnswerBase.user,
        TestPollAnswerBase.voter_chat,
    )


class TestPollAnswerBase:
    poll_id = "id"
    option_ids = [2]
    user = User(1, "", False)
    voter_chat = Chat(1, "")


class TestPollAnswerWithoutRequest(TestPollAnswerBase):
    def test_de_json(self):
        json_dict = {
            "poll_id": self.poll_id,
            "option_ids": self.option_ids,
            "user": self.user.to_dict(),
            "voter_chat": self.voter_chat.to_dict(),
        }
        poll_answer = PollAnswer.de_json(json_dict, None)
        assert poll_answer.api_kwargs == {}

        assert poll_answer.poll_id == self.poll_id
        assert poll_answer.option_ids == tuple(self.option_ids)
        assert poll_answer.user == self.user
        assert poll_answer.voter_chat == self.voter_chat

    def test_to_dict(self, poll_answer):
        poll_answer_dict = poll_answer.to_dict()

        assert isinstance(poll_answer_dict, dict)
        assert poll_answer_dict["poll_id"] == poll_answer.poll_id
        assert poll_answer_dict["option_ids"] == list(poll_answer.option_ids)
        assert poll_answer_dict["user"] == poll_answer.user.to_dict()
        assert poll_answer_dict["voter_chat"] == poll_answer.voter_chat.to_dict()

    def test_equality(self):
        a = PollAnswer(123, [2], self.user, self.voter_chat)
        b = PollAnswer(123, [2], self.user, Chat(1, ""))
        c = PollAnswer(123, [2], User(1, "first", False), self.voter_chat)
        d = PollAnswer(123, [1, 2], self.user, self.voter_chat)
        e = PollAnswer(456, [2], self.user, self.voter_chat)
        f = PollOption("Text", 1)

        assert a == b
        assert hash(a) == hash(b)

        assert a == c
        assert hash(a) == hash(c)

        assert a != d
        assert hash(a) != hash(d)

        assert a != e
        assert hash(a) != hash(e)

        assert a != f
        assert hash(a) != hash(f)

    def test_order_warning(self, recwarn):
        expected_warning = (
            "From v20.5 the order of `option_ids` and `user` is changed as the latter one"
            " became optional. Please update your code to use the new order."
        )
        PollAnswer(123, [2], self.user, self.voter_chat)
        assert len(recwarn) == 0
        PollAnswer(123, self.user, [2], self.voter_chat)
        assert len(recwarn) == 1
        assert str(recwarn[0].message) == expected_warning
        assert recwarn[0].category is PTBDeprecationWarning
        assert recwarn[0].filename == __file__, "wrong stacklevel"


@pytest.fixture(scope="module")
def poll():
    poll = Poll(
        TestPollBase.id_,
        TestPollBase.question,
        TestPollBase.options,
        TestPollBase.total_voter_count,
        TestPollBase.is_closed,
        TestPollBase.is_anonymous,
        TestPollBase.type,
        TestPollBase.allows_multiple_answers,
        explanation=TestPollBase.explanation,
        explanation_entities=TestPollBase.explanation_entities,
        open_period=TestPollBase.open_period,
        close_date=TestPollBase.close_date,
    )
    poll._unfreeze()
    return poll


class TestPollBase:
    id_ = "id"
    question = "Test?"
    options = [PollOption("test", 10), PollOption("test2", 11)]
    total_voter_count = 0
    is_closed = True
    is_anonymous = False
    type = Poll.REGULAR
    allows_multiple_answers = True
    explanation = (
        b"\\U0001f469\\u200d\\U0001f469\\u200d\\U0001f467"
        b"\\u200d\\U0001f467\\U0001f431http://google.com"
    ).decode("unicode-escape")
    explanation_entities = [MessageEntity(13, 17, MessageEntity.URL)]
    open_period = 42
    close_date = datetime.now(timezone.utc)


class TestPollWithoutRequest(TestPollBase):
    def test_de_json(self, bot):
        json_dict = {
            "id": self.id_,
            "question": self.question,
            "options": [o.to_dict() for o in self.options],
            "total_voter_count": self.total_voter_count,
            "is_closed": self.is_closed,
            "is_anonymous": self.is_anonymous,
            "type": self.type,
            "allows_multiple_answers": self.allows_multiple_answers,
            "explanation": self.explanation,
            "explanation_entities": [self.explanation_entities[0].to_dict()],
            "open_period": self.open_period,
            "close_date": to_timestamp(self.close_date),
        }
        poll = Poll.de_json(json_dict, bot)
        assert poll.api_kwargs == {}

        assert poll.id == self.id_
        assert poll.question == self.question
        assert poll.options == tuple(self.options)
        assert poll.options[0].text == self.options[0].text
        assert poll.options[0].voter_count == self.options[0].voter_count
        assert poll.options[1].text == self.options[1].text
        assert poll.options[1].voter_count == self.options[1].voter_count
        assert poll.total_voter_count == self.total_voter_count
        assert poll.is_closed == self.is_closed
        assert poll.is_anonymous == self.is_anonymous
        assert poll.type == self.type
        assert poll.allows_multiple_answers == self.allows_multiple_answers
        assert poll.explanation == self.explanation
        assert poll.explanation_entities == tuple(self.explanation_entities)
        assert poll.open_period == self.open_period
        assert abs(poll.close_date - self.close_date) < timedelta(seconds=1)
        assert to_timestamp(poll.close_date) == to_timestamp(self.close_date)

    def test_de_json_localization(self, tz_bot, bot, raw_bot):
        json_dict = {
            "id": self.id_,
            "question": self.question,
            "options": [o.to_dict() for o in self.options],
            "total_voter_count": self.total_voter_count,
            "is_closed": self.is_closed,
            "is_anonymous": self.is_anonymous,
            "type": self.type,
            "allows_multiple_answers": self.allows_multiple_answers,
            "explanation": self.explanation,
            "explanation_entities": [self.explanation_entities[0].to_dict()],
            "open_period": self.open_period,
            "close_date": to_timestamp(self.close_date),
        }

        poll_raw = Poll.de_json(json_dict, raw_bot)
        poll_bot = Poll.de_json(json_dict, bot)
        poll_bot_tz = Poll.de_json(json_dict, tz_bot)

        # comparing utcoffsets because comparing timezones is unpredicatable
        poll_bot_tz_offset = poll_bot_tz.close_date.utcoffset()
        tz_bot_offset = tz_bot.defaults.tzinfo.utcoffset(
            poll_bot_tz.close_date.replace(tzinfo=None)
        )

        assert poll_raw.close_date.tzinfo == UTC
        assert poll_bot.close_date.tzinfo == UTC
        assert poll_bot_tz_offset == tz_bot_offset

    def test_to_dict(self, poll):
        poll_dict = poll.to_dict()

        assert isinstance(poll_dict, dict)
        assert poll_dict["id"] == poll.id
        assert poll_dict["question"] == poll.question
        assert poll_dict["options"] == [o.to_dict() for o in poll.options]
        assert poll_dict["total_voter_count"] == poll.total_voter_count
        assert poll_dict["is_closed"] == poll.is_closed
        assert poll_dict["is_anonymous"] == poll.is_anonymous
        assert poll_dict["type"] == poll.type
        assert poll_dict["allows_multiple_answers"] == poll.allows_multiple_answers
        assert poll_dict["explanation"] == poll.explanation
        assert poll_dict["explanation_entities"] == [poll.explanation_entities[0].to_dict()]
        assert poll_dict["open_period"] == poll.open_period
        assert poll_dict["close_date"] == to_timestamp(poll.close_date)

    def test_equality(self):
        a = Poll(123, "question", ["O1", "O2"], 1, False, True, Poll.REGULAR, True)
        b = Poll(123, "question", ["o1", "o2"], 1, True, False, Poll.REGULAR, True)
        c = Poll(456, "question", ["o1", "o2"], 1, True, False, Poll.REGULAR, True)
        d = PollOption("Text", 1)

        assert a == b
        assert hash(a) == hash(b)

        assert a != c
        assert hash(a) != hash(c)

        assert a != d
        assert hash(a) != hash(d)

    def test_enum_init(self):
        poll = Poll(
            type="foo",
            id="id",
            question="question",
            options=[],
            total_voter_count=0,
            is_closed=False,
            is_anonymous=False,
            allows_multiple_answers=False,
        )
        assert poll.type == "foo"
        poll = Poll(
            type=PollType.QUIZ,
            id="id",
            question="question",
            options=[],
            total_voter_count=0,
            is_closed=False,
            is_anonymous=False,
            allows_multiple_answers=False,
        )
        assert poll.type is PollType.QUIZ

    def test_parse_entity(self, poll):
        entity = MessageEntity(type=MessageEntity.URL, offset=13, length=17)
        poll.explanation_entities = [entity]

        assert poll.parse_explanation_entity(entity) == "http://google.com"

        with pytest.raises(RuntimeError, match="Poll has no"):
            Poll(
                "id",
                "question",
                [PollOption("text", voter_count=0)],
                total_voter_count=0,
                is_closed=False,
                is_anonymous=False,
                type=Poll.QUIZ,
                allows_multiple_answers=False,
            ).parse_explanation_entity(entity)

    def test_parse_entities(self, poll):
        entity = MessageEntity(type=MessageEntity.URL, offset=13, length=17)
        entity_2 = MessageEntity(type=MessageEntity.BOLD, offset=13, length=1)
        poll.explanation_entities = [entity_2, entity]

        assert poll.parse_explanation_entities(MessageEntity.URL) == {entity: "http://google.com"}
        assert poll.parse_explanation_entities() == {entity: "http://google.com", entity_2: "h"}