"""Tests for Gradio UI functions and initialization in app.py."""

from unittest.mock import MagicMock, patch

from kg_services.ontology import MCPPrompt, MCPTool, PlannedStep


class TestInitializeAgentSystem:
    """Test agent system initialization."""

    @patch("app.McpExecutorAgent")
    @patch("app.SimplePlannerAgent")
    @patch("app.InMemoryKG")
    @patch("app.EmbeddingService")
    def test_initialize_agent_system_success(
        self,
        mock_embedder_cls,
        mock_kg_cls,
        mock_planner_agent_cls,
        mock_executor_agent_cls,
    ):
        """Test successful agent system initialization."""
        from app import initialize_agent_system

        # Setup mocks
        mock_embedder = MagicMock()
        mock_embedder_cls.return_value = mock_embedder

        mock_kg = MagicMock()
        mock_kg.load_tools_from_json.return_value = True
        mock_kg.load_prompts_from_json.return_value = True
        mock_kg.build_vector_index.return_value = True
        mock_kg_cls.return_value = mock_kg

        mock_planner_agent = MagicMock()
        mock_planner_agent_cls.return_value = mock_planner_agent

        mock_executor_agent = MagicMock()
        mock_executor_agent_cls.return_value = mock_executor_agent

        # Call function
        result = initialize_agent_system()

        # Verify result is a tuple with both agents
        assert result == (mock_planner_agent, mock_executor_agent)

        # Verify initialization sequence
        mock_embedder_cls.assert_called_once()
        mock_kg_cls.assert_called_once()
        mock_kg.load_tools_from_json.assert_called_once_with("data/initial_tools.json")
        mock_kg.load_prompts_from_json.assert_called_once_with(
            "data/initial_prompts.json"
        )
        mock_kg.build_vector_index.assert_called_once_with(mock_embedder)
        mock_planner_agent_cls.assert_called_once_with(
            kg=mock_kg, embedder=mock_embedder
        )
        mock_executor_agent_cls.assert_called_once()

    @patch("app.SimplePlannerAgent")
    @patch("app.InMemoryKG")
    @patch("app.EmbeddingService")
    def test_initialize_agent_system_tools_load_failure(
        self, mock_embedder_cls, mock_kg_cls, mock_agent_cls
    ):
        """Test agent initialization when tools fail to load."""
        from app import initialize_agent_system

        # Setup mocks
        mock_embedder = MagicMock()
        mock_embedder_cls.return_value = mock_embedder

        mock_kg = MagicMock()
        mock_kg.load_tools_from_json.return_value = False  # Fail to load tools
        mock_kg_cls.return_value = mock_kg

        # Call function
        result = initialize_agent_system()

        # Verify result
        assert result == (None, None)

        # Verify tools loading was attempted but prompts loading was not
        mock_kg.load_tools_from_json.assert_called_once_with("data/initial_tools.json")
        mock_kg.load_prompts_from_json.assert_not_called()
        mock_agent_cls.assert_not_called()

    @patch("app.SimplePlannerAgent")
    @patch("app.InMemoryKG")
    @patch("app.EmbeddingService")
    def test_initialize_agent_system_prompts_load_failure(
        self, mock_embedder_cls, mock_kg_cls, mock_agent_cls
    ):
        """Test agent initialization when prompts fail to load."""
        from app import initialize_agent_system

        # Setup mocks
        mock_embedder = MagicMock()
        mock_embedder_cls.return_value = mock_embedder

        mock_kg = MagicMock()
        mock_kg.load_tools_from_json.return_value = True
        mock_kg.load_prompts_from_json.return_value = False  # Fail to load prompts
        mock_kg_cls.return_value = mock_kg

        # Call function
        result = initialize_agent_system()

        # Verify result
        assert result == (None, None)

        # Verify loading sequence
        mock_kg.load_tools_from_json.assert_called_once_with("data/initial_tools.json")
        mock_kg.load_prompts_from_json.assert_called_once_with(
            "data/initial_prompts.json"
        )
        mock_kg.build_vector_index.assert_not_called()
        mock_agent_cls.assert_not_called()

    @patch("app.McpExecutorAgent")
    @patch("app.SimplePlannerAgent")
    @patch("app.InMemoryKG")
    @patch("app.EmbeddingService")
    def test_initialize_agent_system_vector_index_failure_with_fallback(
        self,
        mock_embedder_cls,
        mock_kg_cls,
        mock_planner_agent_cls,
        mock_executor_agent_cls,
    ):
        """Test agent initialization when vector index fails but fallback succeeds."""
        from app import initialize_agent_system

        # Setup mocks
        mock_embedder = MagicMock()
        mock_embedder_cls.return_value = mock_embedder

        mock_kg = MagicMock()
        mock_kg.load_tools_from_json.return_value = True
        mock_kg.load_prompts_from_json.return_value = True
        mock_kg.build_vector_index.return_value = False  # Fail to build index
        mock_kg_cls.return_value = mock_kg

        mock_planner_agent = MagicMock()
        mock_planner_agent_cls.return_value = mock_planner_agent

        mock_executor_agent = MagicMock()
        mock_executor_agent_cls.return_value = mock_executor_agent

        # Call function
        result = initialize_agent_system()

        # Verify result
        assert result == (mock_planner_agent, mock_executor_agent)

        # Verify fallback was called
        mock_kg.build_vector_index.assert_called_once_with(mock_embedder)
        mock_kg._create_mock_embeddings.assert_called_once()
        mock_planner_agent_cls.assert_called_once_with(
            kg=mock_kg, embedder=mock_embedder
        )
        mock_executor_agent_cls.assert_called_once()

    @patch("app.SimplePlannerAgent")
    @patch("app.InMemoryKG")
    @patch("app.EmbeddingService")
    def test_initialize_agent_system_exception_handling(
        self, mock_embedder_cls, mock_kg_cls, mock_agent_cls
    ):
        """Test agent initialization exception handling."""
        from app import initialize_agent_system

        # Setup mocks to raise exception
        mock_embedder_cls.side_effect = Exception("Test error")

        # Call function
        result = initialize_agent_system()

        # Verify result
        assert result == (None, None)


class TestGradioUtilityFunctions:
    """Test Gradio utility functions."""

    def test_get_task_status(self):
        """Test get_task_status function."""
        from app import get_task_status

        result = get_task_status()

        # Should return a string status
        assert isinstance(result, str)
        assert len(result) > 0

    def test_create_new_task_with_title(self):
        """Test create_new_task with valid title."""
        from app import create_new_task

        result = create_new_task("Test Task", "Test Description")

        assert isinstance(result, str)
        assert "Test Task" in result
        assert "Test Description" in result
        assert "✅ Created task" in result

    def test_create_new_task_empty_title(self):
        """Test create_new_task with empty title."""
        from app import create_new_task

        result = create_new_task("", "Test Description")

        assert isinstance(result, str)
        assert "❌ Error" in result
        assert "required" in result

    def test_create_new_task_whitespace_title(self):
        """Test create_new_task with whitespace-only title."""
        from app import create_new_task

        result = create_new_task("   ", "Test Description")

        assert isinstance(result, str)
        assert "❌ Error" in result
        assert "required" in result


class TestProcessUserQuery:
    """Test process_user_query function."""

    @patch("app.planner_agent")
    def test_process_user_query_empty_query(self, mock_agent):
        """Test process_user_query with empty query."""
        from app import process_user_query

        result = process_user_query("", [])

        assert result[0] == "Please enter a valid query."
        assert result[1] == []

    def test_process_user_query_no_agent(self):
        """Test process_user_query when agent is not initialized."""
        from app import process_user_query

        with patch("app.planner_agent", None):
            result = process_user_query("test query", [])

            # Function returns empty string as first element, message is in history
            assert result[0] == ""
            assert len(result[1]) == 2  # User query + assistant response
            assert "not initialized" in result[1][1]["content"]

    @patch("app.planner_agent")
    def test_process_user_query_enhanced_planner_no_results(self, mock_agent):
        """Test process_user_query with enhanced planner returning no results."""
        from app import process_user_query

        # Setup mock
        mock_agent.generate_plan.return_value = []

        result = process_user_query("test query", [], use_enhanced_planner=True)

        # Function returns empty string as first element, message is in history
        assert result[0] == ""
        assert len(result[1]) == 2  # User query + assistant response
        assert "couldn't find any relevant" in result[1][1]["content"]

    @patch("app.planner_agent")
    def test_process_user_query_enhanced_planner_with_results(self, mock_agent):
        """Test process_user_query with enhanced planner returning results."""
        from app import process_user_query

        # Create mock planned step
        mock_tool = MCPTool(
            tool_id="test_tool",
            name="Test Tool",
            description="A test tool",
            tags=["test"],
            invocation_command_stub="test_command",
        )

        mock_prompt = MCPPrompt(
            prompt_id="test_prompt",
            name="Test Prompt",
            description="A test prompt",
            target_tool_id="test_tool",
            template_string="Test template",
            tags=["test"],
            input_variables=[],
            difficulty_level="beginner",
        )

        mock_step = PlannedStep(
            tool=mock_tool, prompt=mock_prompt, relevance_score=0.85
        )
        # Mock the summary property since it's computed
        with patch.object(
            type(mock_step),
            "summary",
            new_callable=lambda: property(lambda self: "Test summary"),
        ):
            # Setup mock
            mock_agent.generate_plan.return_value = [mock_step]

            result = process_user_query("test query", [], use_enhanced_planner=True)

            # Function returns empty string as first element, message is in history
            assert result[0] == ""
            assert len(result[1]) == 2  # User query + assistant response
            assert "Enhanced Planning Results" in result[1][1]["content"]
            assert "Test Tool" in result[1][1]["content"]
            assert "Test Prompt" in result[1][1]["content"]

    @patch("app.planner_agent")
    def test_process_user_query_regular_planner(self, mock_agent):
        """Test process_user_query with regular planner."""
        from app import process_user_query

        # Create mock tool
        mock_tool = MCPTool(
            tool_id="test_tool",
            name="Test Tool",
            description="A test tool",
            tags=["test"],
            invocation_command_stub="test_command",
        )

        # Setup mock
        mock_agent.suggest_tools.return_value = [mock_tool]

        result = process_user_query("test query", [], use_enhanced_planner=False)

        # Function returns empty string as first element, message is in history
        assert result[0] == ""
        assert len(result[1]) == 2  # User query + assistant response
        assert "Test Tool" in result[1][1]["content"]


class TestHandleGeneratePlan:
    """Test handle_generate_plan function."""

    @patch("app.planner_agent")
    def test_handle_generate_plan_success(self, mock_agent):
        """Test successful plan generation."""
        from app import handle_generate_plan_core

        # Create mock planned step
        mock_tool = MCPTool(
            tool_id="test_tool",
            name="Test Tool",
            description="A test tool",
            tags=["test"],
            invocation_command_stub="test_command",
        )

        mock_prompt = MCPPrompt(
            prompt_id="test_prompt",
            name="Test Prompt",
            description="A test prompt",
            target_tool_id="test_tool",
            template_string="Test {{input}}",
            tags=["test"],
            input_variables=["input"],
            difficulty_level="beginner",
        )

        mock_step = PlannedStep(
            tool=mock_tool, prompt=mock_prompt, relevance_score=0.85
        )

        # Setup mock
        mock_agent.generate_plan.return_value = [mock_step]

        result = handle_generate_plan_core("test query")

        assert result["status"] == "success"
        assert result["query"] == "test query"
        assert result["total_steps"] == 1
        assert len(result["planned_steps"]) == 1

    @patch("app.planner_agent", None)
    def test_handle_generate_plan_no_agent(self):
        """Test plan generation when agent is not initialized."""
        from app import handle_generate_plan_core

        result = handle_generate_plan_core("test query")

        assert result["status"] == "error"
        assert "not initialized" in result["message"]

    @patch("app.planner_agent")
    def test_handle_generate_plan_empty_query(self, mock_agent):
        """Test plan generation with empty query."""
        from app import handle_generate_plan_core

        result = handle_generate_plan_core("")

        assert result["status"] == "error"
        assert "query" in result["message"]

    @patch("app.planner_agent")
    def test_handle_generate_plan_exception(self, mock_agent):
        """Test plan generation exception handling."""
        from app import handle_generate_plan_core

        # Setup mock to raise exception
        mock_agent.generate_plan.side_effect = Exception("Test error")

        result = handle_generate_plan_core("test query")

        assert result["status"] == "error"
        assert "error" in result["message"]


# Note: Main function testing is complex due to Gradio/Uvicorn integration
# Coverage for main() function is achieved through integration testing