"""
Tests for Gateway Dispatcher Manager
"""

import pytest
import asyncio
from unittest.mock import Mock, patch, AsyncMock, MagicMock
import uuid

from trustgraph.gateway.dispatch.manager import DispatcherManager, DispatcherWrapper

# Keep the real methods intact for proper testing


class TestDispatcherWrapper:
    """Test cases for DispatcherWrapper class"""

    def test_dispatcher_wrapper_initialization(self):
        """Test DispatcherWrapper initialization"""
        mock_handler = Mock()
        wrapper = DispatcherWrapper(mock_handler)
        
        assert wrapper.handler == mock_handler

    @pytest.mark.asyncio
    async def test_dispatcher_wrapper_process(self):
        """Test DispatcherWrapper process method"""
        mock_handler = AsyncMock()
        wrapper = DispatcherWrapper(mock_handler)
        
        result = await wrapper.process("arg1", "arg2")
        
        mock_handler.assert_called_once_with("arg1", "arg2")
        assert result == mock_handler.return_value


class TestDispatcherManager:
    """Test cases for DispatcherManager class"""

    def test_dispatcher_manager_initialization(self):
        """Test DispatcherManager initialization"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        assert manager.pulsar_client == mock_pulsar_client
        assert manager.config_receiver == mock_config_receiver
        assert manager.prefix == "api-gateway"  # default prefix
        assert manager.flows == {}
        assert manager.dispatchers == {}
        
        # Verify manager was added as handler to config receiver
        mock_config_receiver.add_handler.assert_called_once_with(manager)

    def test_dispatcher_manager_initialization_with_custom_prefix(self):
        """Test DispatcherManager initialization with custom prefix"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver, prefix="custom-prefix")
        
        assert manager.prefix == "custom-prefix"

    @pytest.mark.asyncio
    async def test_start_flow(self):
        """Test start_flow method"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        flow_data = {"name": "test_flow", "steps": []}
        
        await manager.start_flow("flow1", flow_data)
        
        assert "flow1" in manager.flows
        assert manager.flows["flow1"] == flow_data

    @pytest.mark.asyncio
    async def test_stop_flow(self):
        """Test stop_flow method"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        # Pre-populate with a flow
        flow_data = {"name": "test_flow", "steps": []}
        manager.flows["flow1"] = flow_data
        
        await manager.stop_flow("flow1", flow_data)
        
        assert "flow1" not in manager.flows

    def test_dispatch_global_service_returns_wrapper(self):
        """Test dispatch_global_service returns DispatcherWrapper"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        wrapper = manager.dispatch_global_service()
        
        assert isinstance(wrapper, DispatcherWrapper)
        assert wrapper.handler == manager.process_global_service

    def test_dispatch_core_export_returns_wrapper(self):
        """Test dispatch_core_export returns DispatcherWrapper"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        wrapper = manager.dispatch_core_export()
        
        assert isinstance(wrapper, DispatcherWrapper)
        assert wrapper.handler == manager.process_core_export

    def test_dispatch_core_import_returns_wrapper(self):
        """Test dispatch_core_import returns DispatcherWrapper"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        wrapper = manager.dispatch_core_import()
        
        assert isinstance(wrapper, DispatcherWrapper)
        assert wrapper.handler == manager.process_core_import

    @pytest.mark.asyncio
    async def test_process_core_import(self):
        """Test process_core_import method"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        with patch('trustgraph.gateway.dispatch.manager.CoreImport') as mock_core_import:
            mock_importer = Mock()
            mock_importer.process = AsyncMock(return_value="import_result")
            mock_core_import.return_value = mock_importer
            
            result = await manager.process_core_import("data", "error", "ok", "request")
            
            mock_core_import.assert_called_once_with(mock_pulsar_client)
            mock_importer.process.assert_called_once_with("data", "error", "ok", "request")
            assert result == "import_result"

    @pytest.mark.asyncio
    async def test_process_core_export(self):
        """Test process_core_export method"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        with patch('trustgraph.gateway.dispatch.manager.CoreExport') as mock_core_export:
            mock_exporter = Mock()
            mock_exporter.process = AsyncMock(return_value="export_result")
            mock_core_export.return_value = mock_exporter
            
            result = await manager.process_core_export("data", "error", "ok", "request")
            
            mock_core_export.assert_called_once_with(mock_pulsar_client)
            mock_exporter.process.assert_called_once_with("data", "error", "ok", "request")
            assert result == "export_result"

    @pytest.mark.asyncio
    async def test_process_global_service(self):
        """Test process_global_service method"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        manager.invoke_global_service = AsyncMock(return_value="global_result")
        
        params = {"kind": "test_kind"}
        result = await manager.process_global_service("data", "responder", params)
        
        manager.invoke_global_service.assert_called_once_with("data", "responder", "test_kind")
        assert result == "global_result"

    @pytest.mark.asyncio
    async def test_invoke_global_service_with_existing_dispatcher(self):
        """Test invoke_global_service with existing dispatcher"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        # Pre-populate with existing dispatcher
        mock_dispatcher = Mock()
        mock_dispatcher.process = AsyncMock(return_value="cached_result")
        manager.dispatchers[(None, "config")] = mock_dispatcher
        
        result = await manager.invoke_global_service("data", "responder", "config")
        
        mock_dispatcher.process.assert_called_once_with("data", "responder")
        assert result == "cached_result"

    @pytest.mark.asyncio
    async def test_invoke_global_service_creates_new_dispatcher(self):
        """Test invoke_global_service creates new dispatcher"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        with patch('trustgraph.gateway.dispatch.manager.global_dispatchers') as mock_dispatchers:
            mock_dispatcher_class = Mock()
            mock_dispatcher = Mock()
            mock_dispatcher.start = AsyncMock()
            mock_dispatcher.process = AsyncMock(return_value="new_result")
            mock_dispatcher_class.return_value = mock_dispatcher
            mock_dispatchers.__getitem__.return_value = mock_dispatcher_class
            
            result = await manager.invoke_global_service("data", "responder", "config")
            
            # Verify dispatcher was created with correct parameters
            mock_dispatcher_class.assert_called_once_with(
                pulsar_client=mock_pulsar_client,
                timeout=120,
                consumer="api-gateway-config-request",
                subscriber="api-gateway-config-request",
                request_queue=None,
                response_queue=None
            )
            mock_dispatcher.start.assert_called_once()
            mock_dispatcher.process.assert_called_once_with("data", "responder")
            
            # Verify dispatcher was cached
            assert manager.dispatchers[(None, "config")] == mock_dispatcher
            assert result == "new_result"

    def test_dispatch_flow_import_returns_method(self):
        """Test dispatch_flow_import returns correct method"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        result = manager.dispatch_flow_import()
        
        assert result == manager.process_flow_import

    def test_dispatch_flow_export_returns_method(self):
        """Test dispatch_flow_export returns correct method"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        result = manager.dispatch_flow_export()
        
        assert result == manager.process_flow_export

    def test_dispatch_socket_returns_method(self):
        """Test dispatch_socket returns correct method"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        result = manager.dispatch_socket()
        
        assert result == manager.process_socket

    def test_dispatch_flow_service_returns_wrapper(self):
        """Test dispatch_flow_service returns DispatcherWrapper"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        wrapper = manager.dispatch_flow_service()
        
        assert isinstance(wrapper, DispatcherWrapper)
        assert wrapper.handler == manager.process_flow_service

    @pytest.mark.asyncio
    async def test_process_flow_import_with_valid_flow_and_kind(self):
        """Test process_flow_import with valid flow and kind"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        # Setup test flow
        manager.flows["test_flow"] = {
            "interfaces": {
                "triples-store": {"queue": "test_queue"}
            }
        }
        
        with patch('trustgraph.gateway.dispatch.manager.import_dispatchers') as mock_dispatchers, \
             patch('uuid.uuid4') as mock_uuid:
            mock_uuid.return_value = "test-uuid"
            mock_dispatcher_class = Mock()
            mock_dispatcher = Mock()
            mock_dispatcher.start = AsyncMock()
            mock_dispatcher_class.return_value = mock_dispatcher
            mock_dispatchers.__getitem__.return_value = mock_dispatcher_class
            mock_dispatchers.__contains__.return_value = True
            
            params = {"flow": "test_flow", "kind": "triples"}
            result = await manager.process_flow_import("ws", "running", params)
            
            mock_dispatcher_class.assert_called_once_with(
                pulsar_client=mock_pulsar_client,
                ws="ws",
                running="running",
                queue={"queue": "test_queue"}
            )
            mock_dispatcher.start.assert_called_once()
            assert result == mock_dispatcher

    @pytest.mark.asyncio
    async def test_process_flow_import_with_invalid_flow(self):
        """Test process_flow_import with invalid flow"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        params = {"flow": "invalid_flow", "kind": "triples"}
        
        with pytest.raises(RuntimeError, match="Invalid flow"):
            await manager.process_flow_import("ws", "running", params)

    @pytest.mark.asyncio
    async def test_process_flow_import_with_invalid_kind(self):
        """Test process_flow_import with invalid kind"""
        import warnings
        with warnings.catch_warnings():
            warnings.simplefilter("ignore", RuntimeWarning)
            mock_pulsar_client = Mock()
            mock_config_receiver = Mock()
            manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        # Setup test flow
        manager.flows["test_flow"] = {
            "interfaces": {
                "triples-store": {"queue": "test_queue"}
            }
        }
        
        with patch('trustgraph.gateway.dispatch.manager.import_dispatchers') as mock_dispatchers:
            mock_dispatchers.__contains__.return_value = False
            
            params = {"flow": "test_flow", "kind": "invalid_kind"}
            
            with pytest.raises(RuntimeError, match="Invalid kind"):
                await manager.process_flow_import("ws", "running", params)

    @pytest.mark.asyncio
    async def test_process_flow_export_with_valid_flow_and_kind(self):
        """Test process_flow_export with valid flow and kind"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        # Setup test flow
        manager.flows["test_flow"] = {
            "interfaces": {
                "triples-store": {"queue": "test_queue"}
            }
        }
        
        with patch('trustgraph.gateway.dispatch.manager.export_dispatchers') as mock_dispatchers, \
             patch('uuid.uuid4') as mock_uuid:
            mock_uuid.return_value = "test-uuid"
            mock_dispatcher_class = Mock()
            mock_dispatcher = Mock()
            mock_dispatcher_class.return_value = mock_dispatcher
            mock_dispatchers.__getitem__.return_value = mock_dispatcher_class
            mock_dispatchers.__contains__.return_value = True
            
            params = {"flow": "test_flow", "kind": "triples"}
            result = await manager.process_flow_export("ws", "running", params)
            
            mock_dispatcher_class.assert_called_once_with(
                pulsar_client=mock_pulsar_client,
                ws="ws",
                running="running",
                queue={"queue": "test_queue"},
                consumer="api-gateway-test-uuid",
                subscriber="api-gateway-test-uuid"
            )
            assert result == mock_dispatcher

    @pytest.mark.asyncio
    async def test_process_socket(self):
        """Test process_socket method"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        with patch('trustgraph.gateway.dispatch.manager.Mux') as mock_mux:
            mock_mux_instance = Mock()
            mock_mux.return_value = mock_mux_instance
            
            result = await manager.process_socket("ws", "running", {})
            
            mock_mux.assert_called_once_with(manager, "ws", "running")
            assert result == mock_mux_instance

    @pytest.mark.asyncio
    async def test_process_flow_service(self):
        """Test process_flow_service method"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        manager.invoke_flow_service = AsyncMock(return_value="flow_result")
        
        params = {"flow": "test_flow", "kind": "agent"}
        result = await manager.process_flow_service("data", "responder", params)
        
        manager.invoke_flow_service.assert_called_once_with("data", "responder", "test_flow", "agent")
        assert result == "flow_result"

    @pytest.mark.asyncio
    async def test_invoke_flow_service_with_existing_dispatcher(self):
        """Test invoke_flow_service with existing dispatcher"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        # Add flow to the flows dictionary
        manager.flows["test_flow"] = {"services": {"agent": {}}}
        
        # Pre-populate with existing dispatcher
        mock_dispatcher = Mock()
        mock_dispatcher.process = AsyncMock(return_value="cached_result")
        manager.dispatchers[("test_flow", "agent")] = mock_dispatcher
        
        result = await manager.invoke_flow_service("data", "responder", "test_flow", "agent")
        
        mock_dispatcher.process.assert_called_once_with("data", "responder")
        assert result == "cached_result"

    @pytest.mark.asyncio
    async def test_invoke_flow_service_creates_request_response_dispatcher(self):
        """Test invoke_flow_service creates request-response dispatcher"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        # Setup test flow
        manager.flows["test_flow"] = {
            "interfaces": {
                "agent": {
                    "request": "agent_request_queue",
                    "response": "agent_response_queue"
                }
            }
        }
        
        with patch('trustgraph.gateway.dispatch.manager.request_response_dispatchers') as mock_dispatchers:
            mock_dispatcher_class = Mock()
            mock_dispatcher = Mock()
            mock_dispatcher.start = AsyncMock()
            mock_dispatcher.process = AsyncMock(return_value="new_result")
            mock_dispatcher_class.return_value = mock_dispatcher
            mock_dispatchers.__getitem__.return_value = mock_dispatcher_class
            mock_dispatchers.__contains__.return_value = True
            
            result = await manager.invoke_flow_service("data", "responder", "test_flow", "agent")
            
            # Verify dispatcher was created with correct parameters
            mock_dispatcher_class.assert_called_once_with(
                pulsar_client=mock_pulsar_client,
                request_queue="agent_request_queue",
                response_queue="agent_response_queue",
                timeout=120,
                consumer="api-gateway-test_flow-agent-request",
                subscriber="api-gateway-test_flow-agent-request"
            )
            mock_dispatcher.start.assert_called_once()
            mock_dispatcher.process.assert_called_once_with("data", "responder")
            
            # Verify dispatcher was cached
            assert manager.dispatchers[("test_flow", "agent")] == mock_dispatcher
            assert result == "new_result"

    @pytest.mark.asyncio
    async def test_invoke_flow_service_creates_sender_dispatcher(self):
        """Test invoke_flow_service creates sender dispatcher"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        # Setup test flow
        manager.flows["test_flow"] = {
            "interfaces": {
                "text-load": {"queue": "text_load_queue"}
            }
        }
        
        with patch('trustgraph.gateway.dispatch.manager.request_response_dispatchers') as mock_rr_dispatchers, \
             patch('trustgraph.gateway.dispatch.manager.sender_dispatchers') as mock_sender_dispatchers:
            mock_rr_dispatchers.__contains__.return_value = False
            mock_sender_dispatchers.__contains__.return_value = True
            
            mock_dispatcher_class = Mock()
            mock_dispatcher = Mock()
            mock_dispatcher.start = AsyncMock()
            mock_dispatcher.process = AsyncMock(return_value="sender_result")
            mock_dispatcher_class.return_value = mock_dispatcher
            mock_sender_dispatchers.__getitem__.return_value = mock_dispatcher_class
            
            result = await manager.invoke_flow_service("data", "responder", "test_flow", "text-load")
            
            # Verify dispatcher was created with correct parameters
            mock_dispatcher_class.assert_called_once_with(
                pulsar_client=mock_pulsar_client,
                queue={"queue": "text_load_queue"}
            )
            mock_dispatcher.start.assert_called_once()
            mock_dispatcher.process.assert_called_once_with("data", "responder")
            
            # Verify dispatcher was cached
            assert manager.dispatchers[("test_flow", "text-load")] == mock_dispatcher
            assert result == "sender_result"

    @pytest.mark.asyncio
    async def test_invoke_flow_service_invalid_flow(self):
        """Test invoke_flow_service with invalid flow"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        with pytest.raises(RuntimeError, match="Invalid flow"):
            await manager.invoke_flow_service("data", "responder", "invalid_flow", "agent")

    @pytest.mark.asyncio
    async def test_invoke_flow_service_unsupported_kind_by_flow(self):
        """Test invoke_flow_service with kind not supported by flow"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        # Setup test flow without agent interface
        manager.flows["test_flow"] = {
            "interfaces": {
                "text-completion": {"request": "req", "response": "resp"}
            }
        }
        
        with pytest.raises(RuntimeError, match="This kind not supported by flow"):
            await manager.invoke_flow_service("data", "responder", "test_flow", "agent")

    @pytest.mark.asyncio
    async def test_invoke_flow_service_invalid_kind(self):
        """Test invoke_flow_service with invalid kind"""
        mock_pulsar_client = Mock()
        mock_config_receiver = Mock()
        manager = DispatcherManager(mock_pulsar_client, mock_config_receiver)
        
        # Setup test flow with interface but unsupported kind
        manager.flows["test_flow"] = {
            "interfaces": {
                "invalid-kind": {"request": "req", "response": "resp"}
            }
        }
        
        with patch('trustgraph.gateway.dispatch.manager.request_response_dispatchers') as mock_rr_dispatchers, \
             patch('trustgraph.gateway.dispatch.manager.sender_dispatchers') as mock_sender_dispatchers:
            mock_rr_dispatchers.__contains__.return_value = False
            mock_sender_dispatchers.__contains__.return_value = False
            
            with pytest.raises(RuntimeError, match="Invalid kind"):
                await manager.invoke_flow_service("data", "responder", "test_flow", "invalid-kind")