from unittest.mock import MagicMock, patch

import pytest
from mem0.client.main import MemoryClient
from mem0.memory.main import Memory

from crewai.memory.storage.mem0_storage import Mem0Storage


# Define the class (if not already defined)
class MockCrew:
    def __init__(self, memory_config):
        self.memory_config = memory_config
        self.agents = [MagicMock(role="Test Agent")]


@pytest.fixture
def mock_mem0_memory():
    """Fixture to create a mock Memory instance"""
    mock_memory = MagicMock(spec=Memory)
    return mock_memory


@pytest.fixture
def mem0_storage_with_mocked_config(mock_mem0_memory):
    """Fixture to create a Mem0Storage instance with mocked dependencies"""

    # Patch the Memory class to return our mock
    with patch("mem0.memory.main.Memory.from_config", return_value=mock_mem0_memory) as mock_from_config:
        config = {
            "vector_store": {
                "provider": "mock_vector_store",
                "config": {"host": "localhost", "port": 6333},
            },
            "llm": {
                "provider": "mock_llm",
                "config": {"api_key": "mock-api-key", "model": "mock-model"},
            },
            "embedder": {
                "provider": "mock_embedder",
                "config": {"api_key": "mock-api-key", "model": "mock-model"},
            },
            "graph_store": {
                "provider": "mock_graph_store",
                "config": {
                    "url": "mock-url",
                    "username": "mock-user",
                    "password": "mock-password",
                },
            },
            "history_db_path": "/mock/path",
            "version": "test-version",
            "custom_fact_extraction_prompt": "mock prompt 1",
            "custom_update_memory_prompt": "mock prompt 2",
        }

        # Instantiate the class with memory_config
        crew = MockCrew(
            memory_config={
                "provider": "mem0",
                "config": {"user_id": "test_user", "local_mem0_config": config},
            }
        )

        mem0_storage = Mem0Storage(type="short_term", crew=crew)
        return mem0_storage, mock_from_config, config


def test_mem0_storage_initialization(mem0_storage_with_mocked_config, mock_mem0_memory):
    """Test that Mem0Storage initializes correctly with the mocked config"""
    mem0_storage, mock_from_config, config = mem0_storage_with_mocked_config
    assert mem0_storage.memory_type == "short_term"
    assert mem0_storage.memory is mock_mem0_memory
    mock_from_config.assert_called_once_with(config)


@pytest.fixture
def mock_mem0_memory_client():
    """Fixture to create a mock MemoryClient instance"""
    mock_memory = MagicMock(spec=MemoryClient)
    return mock_memory


@pytest.fixture
def mem0_storage_with_memory_client_using_config_from_crew(mock_mem0_memory_client):
    """Fixture to create a Mem0Storage instance with mocked dependencies"""

    # We need to patch the MemoryClient before it's instantiated
    with patch.object(MemoryClient, "__new__", return_value=mock_mem0_memory_client):
        crew = MockCrew(
            memory_config={
                "provider": "mem0",
                "config": {
                    "user_id": "test_user",
                    "api_key": "ABCDEFGH",
                    "org_id": "my_org_id",
                    "project_id": "my_project_id",
                },
            }
        )

        mem0_storage = Mem0Storage(type="short_term", crew=crew)
        return mem0_storage


@pytest.fixture
def mem0_storage_with_memory_client_using_explictly_config(mock_mem0_memory_client, mock_mem0_memory):
    """Fixture to create a Mem0Storage instance with mocked dependencies"""

    # We need to patch both MemoryClient and Memory to prevent actual initialization
    with patch.object(MemoryClient, "__new__", return_value=mock_mem0_memory_client), \
         patch.object(Memory, "__new__", return_value=mock_mem0_memory):

        crew = MockCrew(
            memory_config={
                "provider": "mem0",
                "config": {
                    "user_id": "test_user",
                    "api_key": "ABCDEFGH",
                    "org_id": "my_org_id",
                    "project_id": "my_project_id",
                },
            }
        )

        new_config = {"provider": "mem0", "config": {"api_key": "new-api-key"}}

        mem0_storage = Mem0Storage(type="short_term", crew=crew, config=new_config)
        return mem0_storage


def test_mem0_storage_with_memory_client_initialization(
    mem0_storage_with_memory_client_using_config_from_crew, mock_mem0_memory_client
):
    """Test Mem0Storage initialization with MemoryClient"""
    assert (
        mem0_storage_with_memory_client_using_config_from_crew.memory_type
        == "short_term"
    )
    assert (
        mem0_storage_with_memory_client_using_config_from_crew.memory
        is mock_mem0_memory_client
    )


def test_mem0_storage_with_explict_config(
    mem0_storage_with_memory_client_using_explictly_config,
):
    expected_config = {"provider": "mem0", "config": {"api_key": "new-api-key"}}
    assert (
        mem0_storage_with_memory_client_using_explictly_config.config == expected_config
    )
    assert (
        mem0_storage_with_memory_client_using_explictly_config.memory_config
        == expected_config
    )


def test_save_method_with_memory_oss(mem0_storage_with_mocked_config):
    """Test save method for different memory types"""
    mem0_storage, _, _ = mem0_storage_with_mocked_config
    mem0_storage.memory.add = MagicMock()
    
    # Test short_term memory type (already set in fixture)
    test_value = "This is a test memory"
    test_metadata = {"key": "value"}
    
    mem0_storage.save(test_value, test_metadata)
    
    expected_messages = [{"role": "assistant", "content": test_value}]
    mem0_storage.memory.add.assert_called_once_with(
        expected_messages,
        agent_id="Test_Agent",
        infer=False,
        metadata={"type": "short_term", "key": "value"},
    )


def test_save_method_with_memory_client(mem0_storage_with_memory_client_using_config_from_crew):
    """Test save method for different memory types"""
    mem0_storage = mem0_storage_with_memory_client_using_config_from_crew
    mem0_storage.memory.add = MagicMock()
    
    # Test short_term memory type (already set in fixture)
    test_value = "This is a test memory"
    test_metadata = {"key": "value"}
    
    mem0_storage.save(test_value, test_metadata)
    
    expected_messages = [{"role": "assistant", "content": test_value}]
    mem0_storage.memory.add.assert_called_once_with(
        expected_messages,
        agent_id="Test_Agent",
        infer=False,
        metadata={"type": "short_term", "key": "value"},
        output_format="v1.1"
    )


def test_search_method_with_memory_oss(mem0_storage_with_mocked_config):
    """Test search method for different memory types"""
    mem0_storage, _, _ = mem0_storage_with_mocked_config
    mock_results = {"results": [{"score": 0.9, "content": "Result 1"}, {"score": 0.4, "content": "Result 2"}]}
    mem0_storage.memory.search = MagicMock(return_value=mock_results)

    results = mem0_storage.search("test query", limit=5, score_threshold=0.5)

    mem0_storage.memory.search.assert_called_once_with(
        query="test query", 
        limit=5, 
        agent_id="Test_Agent",
        user_id="test_user"
    )

    assert len(results) == 1
    assert results[0]["content"] == "Result 1"


def test_save_method_external_memory_type():
    """Test save method specifically for external memory type"""
    crew = MockCrew(
        memory_config={
            "provider": "mem0",
            "config": {"user_id": "test_user", "api_key": "test-key"},
        }
    )
    
    with patch.object(MemoryClient, "__new__") as mock_client:
        mock_memory_instance = MagicMock(spec=MemoryClient)
        mock_client.return_value = mock_memory_instance
        
        mem0_storage = Mem0Storage(type="external", crew=crew)
        mem0_storage.memory.add = MagicMock()
        
        test_value = "External memory test content"
        test_metadata = {"task": "test_task", "agent": "test_agent"}
        
        mem0_storage.save(test_value, test_metadata)
        
        expected_messages = [{"role": "assistant", "content": test_value}]
        mem0_storage.memory.add.assert_called_once_with(
            expected_messages,
            user_id="test_user",
            agent_id="Test_Agent",
            metadata={"type": "external", "task": "test_task", "agent": "test_agent"},
            output_format="v1.1"
        )


def test_save_method_with_non_string_value():
    """Test save method when value is already in message format"""
    crew = MockCrew(
        memory_config={
            "provider": "mem0",
            "config": {"user_id": "test_user", "api_key": "test-key"},
        }
    )
    
    with patch.object(MemoryClient, "__new__") as mock_client:
        mock_memory_instance = MagicMock(spec=MemoryClient)
        mock_client.return_value = mock_memory_instance
        
        mem0_storage = Mem0Storage(type="external", crew=crew)
        mem0_storage.memory.add = MagicMock()
        
        test_messages = [{"role": "user", "content": "Test message"}]
        test_metadata = {"task": "test_task"}
        
        mem0_storage.save(test_messages, test_metadata)
        
        mem0_storage.memory.add.assert_called_once_with(
            test_messages,
            user_id="test_user",
            agent_id="Test_Agent",
            metadata={"type": "external", "task": "test_task"},
            output_format="v1.1"
        )


def test_search_method_with_memory_client(mem0_storage_with_memory_client_using_config_from_crew):
    """Test search method for different memory types"""
    mem0_storage = mem0_storage_with_memory_client_using_config_from_crew
    mock_results = {"results": [{"score": 0.9, "content": "Result 1"}, {"score": 0.4, "content": "Result 2"}]}
    mem0_storage.memory.search = MagicMock(return_value=mock_results)

    results = mem0_storage.search("test query", limit=5, score_threshold=0.5)

    mem0_storage.memory.search.assert_called_once_with(
        query="test query", 
        limit=5, 
        agent_id="Test_Agent", 
        metadata={"type": "short_term"},
        user_id="test_user",
        output_format='v1.1'
    )

    assert len(results) == 1
    assert results[0]["content"] == "Result 1"