from unittest.mock import AsyncMock, MagicMock, patch
import pytest
from fastapi.testclient import TestClient

from app.controller.tool_controller import install_tool


@pytest.mark.unit
class TestToolController:
    """Test cases for tool controller endpoints."""
    
    @pytest.mark.asyncio
    async def test_install_notion_tool_success(self):
        tool_name = "notion"
        mock_toolkit = AsyncMock()
        mock_tools = [MagicMock(), MagicMock()]
        for tool, name in zip(mock_tools, ["create_page", "update_page"]):
            tool.func.__name__ = name
        mock_toolkit.get_tools = MagicMock(return_value=mock_tools)
        with patch("app.controller.tool_controller.NotionMCPToolkit", return_value=mock_toolkit):
            result = await install_tool(tool_name)
        assert result == ["create_page", "update_page"]
        mock_toolkit.connect.assert_called_once()
        mock_toolkit.disconnect.assert_called_once()

    @pytest.mark.asyncio
    async def test_install_unknown_tool(self):
        result = await install_tool("unknown_tool")
        assert result == {"error": "Tool not found"}

    @pytest.mark.asyncio
    async def test_install_notion_tool_connection_failure(self):
        mock_toolkit = AsyncMock()
        mock_toolkit.connect.side_effect = Exception("Connection failed")
        with patch("app.controller.tool_controller.NotionMCPToolkit", return_value=mock_toolkit):
            with pytest.raises(Exception, match="Connection failed"):
                await install_tool("notion")

    @pytest.mark.asyncio
    async def test_install_notion_tool_get_tools_failure(self):
        mock_toolkit = AsyncMock()
        mock_toolkit.get_tools = MagicMock(side_effect=Exception("Failed to get tools"))
        with patch("app.controller.tool_controller.NotionMCPToolkit", return_value=mock_toolkit):
            with pytest.raises(Exception, match="Failed to get tools"):
                await install_tool("notion")

    @pytest.mark.asyncio
    async def test_install_notion_tool_disconnect_failure(self):
        mock_toolkit = AsyncMock()
        mock_tools = [MagicMock()]
        mock_tools[0].func.__name__ = "test_tool"
        mock_toolkit.get_tools = MagicMock(return_value=mock_tools)
        mock_toolkit.disconnect.side_effect = Exception("Disconnect failed")
        with patch("app.controller.tool_controller.NotionMCPToolkit", return_value=mock_toolkit):
            with pytest.raises(Exception, match="Disconnect failed"):
                await install_tool("notion")

    @pytest.mark.asyncio
    async def test_install_notion_tool_empty_tools(self):
        mock_toolkit = AsyncMock()
        mock_toolkit.get_tools = MagicMock(return_value=[])
        with patch("app.controller.tool_controller.NotionMCPToolkit", return_value=mock_toolkit):
            result = await install_tool("notion")
        assert result == []
        mock_toolkit.connect.assert_called_once()
        mock_toolkit.disconnect.assert_called_once()

    @pytest.mark.asyncio
    async def test_install_notion_tool_with_complex_tools(self):
        mock_toolkit = AsyncMock()
        names = ["create_database", "query_database", "update_block", "delete_page"]
        mock_tools = []
        for name in names:
            mt = MagicMock()
            mt.func.__name__ = name
            mock_tools.append(mt)
        mock_toolkit.get_tools = MagicMock(return_value=mock_tools)
        with patch("app.controller.tool_controller.NotionMCPToolkit", return_value=mock_toolkit):
            result = await install_tool("notion")
        assert result == names
        mock_toolkit.connect.assert_called_once()
        mock_toolkit.disconnect.assert_called_once()


@pytest.mark.integration
class TestToolControllerIntegration:
    """Integration tests for tool controller."""
    
    def test_install_notion_tool_endpoint_integration(self, client: TestClient):
        """Test install Notion tool endpoint through FastAPI test client."""
        tool_name = "notion"
        
        mock_toolkit = AsyncMock()
        mock_tools = [MagicMock(), MagicMock()]
        mock_tools[0].func.__name__ = "create_page"
        mock_tools[1].func.__name__ = "update_page"
        mock_toolkit.get_tools = MagicMock(return_value=mock_tools)
        
        with patch("app.controller.tool_controller.NotionMCPToolkit", return_value=mock_toolkit):
            response = client.post(f"/install/tool/{tool_name}")
            
            assert response.status_code == 200
            assert response.json() == ["create_page", "update_page"]

    def test_install_unknown_tool_endpoint_integration(self, client: TestClient):
        """Test install unknown tool endpoint through FastAPI test client."""
        tool_name = "unknown_tool"
        
        response = client.post(f"/install/tool/{tool_name}")
        
        assert response.status_code == 200
        assert response.json() == {"error": "Tool not found"}

    def test_install_notion_tool_endpoint_with_connection_error(self, client: TestClient):
        """Test install Notion tool endpoint when connection fails."""
        tool_name = "notion"
        
        mock_toolkit = AsyncMock()
        mock_toolkit.connect.side_effect = Exception("Connection failed")
        
        with patch("app.controller.tool_controller.NotionMCPToolkit", return_value=mock_toolkit):
            # The exception should be raised by the endpoint since there's no error handling
            with pytest.raises(Exception, match="Connection failed"):
                response = client.post(f"/install/tool/{tool_name}")


@pytest.mark.model_backend
class TestToolControllerWithRealMCP:
    """Tests that require real MCP connections (marked for selective running)."""
    
    @pytest.mark.asyncio
    async def test_install_notion_tool_with_real_connection(self):
        """Test Notion tool installation with real MCP connection."""
        tool_name = "notion"
        
        # This test would connect to real Notion MCP server
        # Requires actual MCP server setup and credentials
        # Marked as model_backend test for selective execution
        assert True  # Placeholder

    @pytest.mark.very_slow
    async def test_install_and_test_all_notion_tools(self):
        """Test installation and functionality of all Notion tools (very slow test)."""
        # This test would install and test each Notion tool individually
        # Marked as very_slow for execution only in full test mode
        assert True  # Placeholder


@pytest.mark.unit
class TestToolControllerErrorCases:
    """Test error and edge cases for tool installation."""

    @pytest.mark.asyncio
    async def test_install_tool_with_malformed_tool_response(self):
        mock_toolkit = AsyncMock()
        tools = [MagicMock(), object()]  # Second item lacks func
        tools[0].func.__name__ = "valid_tool"
        mock_toolkit.get_tools = MagicMock(return_value=tools)
        with patch("app.controller.tool_controller.NotionMCPToolkit", return_value=mock_toolkit):
            with pytest.raises(AttributeError):
                await install_tool("notion")

    @pytest.mark.asyncio
    async def test_install_tool_with_none_toolkit(self):
        with patch("app.controller.tool_controller.NotionMCPToolkit", return_value=None):
            with pytest.raises(AttributeError):
                await install_tool("notion")

    @pytest.mark.asyncio
    async def test_install_tool_with_special_characters_in_name(self):
        result = await install_tool("notion@#$%")
        assert result == {"error": "Tool not found"}

    @pytest.mark.asyncio
    async def test_install_tool_with_empty_string_name(self):
        result = await install_tool("")
        assert result == {"error": "Tool not found"}

    @pytest.mark.asyncio
    async def test_install_tool_with_none_name(self):
        result = await install_tool(None)
        assert result == {"error": "Tool not found"}

    @pytest.mark.asyncio
    async def test_install_notion_tool_partial_failure(self):
        mock_toolkit = AsyncMock()
        mock_toolkit.connect.return_value = None
        tools = [MagicMock(), MagicMock(), MagicMock()]
        tools[0].func.__name__ = "create_page"
        tools[1].func.__name__ = "update_page"
        tools[2].func = None
        mock_toolkit.get_tools = MagicMock(return_value=tools)
        mock_toolkit.disconnect.return_value = None
        with patch("app.controller.tool_controller.NotionMCPToolkit", return_value=mock_toolkit):
            with pytest.raises(AttributeError):
                await install_tool("notion")