"""Тесты для команды !stats."""
import pytest
from unittest.mock import AsyncMock, MagicMock


class TestStatsCommand:
    """Тесты Discord-команды stats."""

    def _make_mock_guild(self, channel_count=5, member_count=100):
        """Создать mock-сервер."""
        guild = MagicMock()
        guild.channels = [MagicMock() for _ in range(channel_count)]
        guild.member_count = member_count
        return guild

    async def test_stats_sends_embed(self):
        """Команда stats отправляет embed-сообщение."""
        from commands.stats import Stats

        mock_ctx = MagicMock()
        mock_ctx.bot.latency = 0.035
        mock_ctx.bot.guilds = []
        mock_ctx.send = AsyncMock(return_value=None)

        cog = Stats()
        await cog.stats(cog, mock_ctx)

        mock_ctx.send.assert_awaited_once()
        call_args = mock_ctx.send.call_args
        embed = call_args[1]["embed"] if call_args[1] else call_args[0][0]
        assert embed.title == "Статистика серверов"

    async def test_stats_correct_values(self):
        """Значения серверов, каналов и пользователей считаются верно."""
        from commands.stats import Stats

        guild1 = self._make_mock_guild(channel_count=10, member_count=200)
        guild2 = self._make_mock_guild(channel_count=5, member_count=50)

        mock_ctx = MagicMock()
        mock_ctx.bot.latency = 0.035
        mock_ctx.bot.guilds = [guild1, guild2]
        mock_ctx.send = AsyncMock(return_value=None)

        cog = Stats()
        await cog.stats(cog, mock_ctx)

        call_args = mock_ctx.send.call_args
        embed = call_args[1]["embed"] if call_args[1] else call_args[0][0]

        fields = {f.name: f.value for f in embed.fields}
        assert fields["Серверов"] == "2"
        assert fields["Каналов"] == "15"
        assert fields["Пользователей"] == "250"
        assert "35.0 мс" in fields["Пинг"]

    async def test_stats_empty_guilds(self):
        """Пустой список серверов не вызывает ошибок."""
        from commands.stats import Stats

        mock_ctx = MagicMock()
        mock_ctx.bot.latency = 0.050
        mock_ctx.bot.guilds = []
        mock_ctx.send = AsyncMock(return_value=None)

        cog = Stats()
        await cog.stats(cog, mock_ctx)

        call_args = mock_ctx.send.call_args
        embed = call_args[1]["embed"] if call_args[1] else call_args[0][0]
        fields = {f.name: f.value for f in embed.fields}
        assert fields["Серверов"] == "0"
        assert fields["Каналов"] == "0"
        assert fields["Пользователей"] == "0"

    async def test_stats_none_member_count(self):
        """member_count=None не вызывает ошибок."""
        from commands.stats import Stats

        guild = self._make_mock_guild(channel_count=3, member_count=None)

        mock_ctx = MagicMock()
        mock_ctx.bot.latency = 0.040
        mock_ctx.bot.guilds = [guild]
        mock_ctx.send = AsyncMock(return_value=None)

        cog = Stats()
        await cog.stats(cog, mock_ctx)

        call_args = mock_ctx.send.call_args
        embed = call_args[1]["embed"] if call_args[1] else call_args[0][0]
        fields = {f.name: f.value for f in embed.fields}
        assert fields["Пользователей"] == "0"

    async def test_stats_excludes_categories(self):
        """Категории не входят в счётчик каналов."""
        import discord
        from commands.stats import Stats

        guild = MagicMock()
        text_ch = MagicMock()
        voice_ch = MagicMock()
        category_ch = MagicMock(spec=discord.CategoryChannel)
        guild.channels = [text_ch, voice_ch, category_ch]
        guild.member_count = 50

        mock_ctx = MagicMock()
        mock_ctx.bot.latency = 0.040
        mock_ctx.bot.guilds = [guild]
        mock_ctx.send = AsyncMock(return_value=None)

        cog = Stats()
        await cog.stats(cog, mock_ctx)

        call_args = mock_ctx.send.call_args
        embed = call_args[1]["embed"] if call_args[1] else call_args[0][0]
        fields = {f.name: f.value for f in embed.fields}
        assert fields["Каналов"] == "2"  # text + voice, категория исключена