"""
Тесты для helper_bot.middlewares.dependencies_middleware.
"""

from unittest.mock import AsyncMock, MagicMock, patch

import pytest
from helper_bot.middlewares.dependencies_middleware import \
    DependenciesMiddleware


@pytest.mark.unit
@pytest.mark.asyncio
class TestDependenciesMiddleware:
    """Тесты для DependenciesMiddleware."""

    @pytest.fixture
    def middleware(self):
        """Экземпляр middleware."""
        return DependenciesMiddleware()

    @pytest.fixture
    def mock_handler(self):
        """Мок handler."""
        return AsyncMock(return_value="ok")

    @patch("helper_bot.middlewares.dependencies_middleware.get_global_instance")
    async def test_injects_bot_db_and_settings_into_data(
        self, mock_get_global, middleware, mock_handler
    ):
        """В data подставляются bot_db и settings из get_global_instance."""
        mock_bdf = MagicMock()
        mock_db = MagicMock()
        mock_settings = {"Telegram": {}}
        mock_bdf.get_db.return_value = mock_db
        mock_bdf.settings = mock_settings
        mock_get_global.return_value = mock_bdf

        event = MagicMock()
        data = {}

        result = await middleware(mock_handler, event, data)

        mock_get_global.assert_called_once()
        assert data["bot_db"] is mock_db
        assert data["settings"] is mock_settings
        mock_handler.assert_called_once_with(event, data)
        assert result == "ok"

    @patch("helper_bot.middlewares.dependencies_middleware.get_global_instance")
    async def test_exception_does_not_break_chain(
        self, mock_get_global, middleware, mock_handler
    ):
        """При исключении в get_global_instance handler всё равно вызывается."""
        mock_get_global.side_effect = RuntimeError("No global instance")

        event = MagicMock()
        data = {}

        result = await middleware(mock_handler, event, data)

        mock_handler.assert_called_once_with(event, data)
        assert result == "ok"