"""Unit tests for N8N integration with bearer token support."""
import pytest
from unittest.mock import Mock, AsyncMock, patch
from infrastructure.clients.n8n.n8n_client import N8NClient
from infrastructure.clients.n8n.models import WebhooksRequest, WebhooksResponse
from infrastructure.clients.n8n.settings import ClientSettings
from infrastructure.services.n8n_notification_service import N8NNotificationService
from domain.services.notification_service import NotificationRequest, NotificationResponse
import logging


class TestN8NClientBearerToken:
    """Test N8N client with bearer token support."""
    
    def setup_method(self):
        """Set up test fixtures."""
        self.settings = ClientSettings(
            base_url="http://test-n8n.com",
            token="n8n-token-123"
        )
        self.logger = logging.getLogger("test")
        self.client = N8NClient(self.settings, self.logger)
    
    @pytest.mark.asyncio
    async def test_post_completion_event_without_bearer_token(self):
        """Test posting completion event without client bearer token."""
        with patch.object(self.client, '_make_request') as mock_request:
            mock_request.return_value = {"acknowledged": True}
            
            request = WebhooksRequest(message="Test message", job_id="job-123")
            result = await self.client.post_completion_event(request)
            
            # Verify call was made correctly
            mock_request.assert_called_once_with(
                "POST", 
                "/lovable-analysis", 
                {"message": "Test message"}, 
                {"rowID": "job-123"}
            )
            
            assert result.acknowledged is True
    
    @pytest.mark.asyncio
    async def test_post_completion_event_with_bearer_token(self):
        """Test posting completion event with client bearer token."""
        with patch.object(self.client, '_make_request') as mock_request:
            mock_request.return_value = {"acknowledged": True}
            
            request = WebhooksRequest(message="Test message", job_id="job-123")
            bearer_token = "client-bearer-token-xyz"
            
            result = await self.client.post_completion_event(request, bearer_token)
            
            # Verify call includes both rowID and Authorization headers
            expected_headers = {
                "rowID": "job-123",
                "Authorization": "Bearer client-bearer-token-xyz"
            }
            
            mock_request.assert_called_once_with(
                "POST", 
                "/lovable-analysis", 
                {"message": "Test message"}, 
                expected_headers
            )
            
            assert result.acknowledged is True
    
    @pytest.mark.asyncio
    async def test_post_completion_event_with_empty_bearer_token(self):
        """Test posting completion event with empty bearer token."""
        with patch.object(self.client, '_make_request') as mock_request:
            mock_request.return_value = {"acknowledged": True}
            
            request = WebhooksRequest(message="Test message", job_id="job-123")
            
            # Empty string should be treated as None
            result = await self.client.post_completion_event(request, "")
            
            # Should only have rowID header, no Authorization
            mock_request.assert_called_once_with(
                "POST", 
                "/lovable-analysis", 
                {"message": "Test message"}, 
                {"rowID": "job-123"}
            )
            
            assert result.acknowledged is True
    
    @pytest.mark.asyncio
    async def test_headers_combination(self):
        """Test that headers are properly combined."""
        with patch.object(self.client, '_make_request') as mock_request:
            mock_request.return_value = {"acknowledged": False}
            
            request = WebhooksRequest(message="Test", job_id="test-job")
            bearer_token = "test-token"
            
            await self.client.post_completion_event(request, bearer_token)
            
            # Verify the headers contain both required values
            call_args = mock_request.call_args
            headers = call_args[0][3]  # Fourth argument is custom_headers
            
            assert headers["rowID"] == "test-job"
            assert headers["Authorization"] == "Bearer test-token"
            assert len(headers) == 2  # Should only have these two headers


class TestN8NNotificationServiceBearerToken:
    """Test N8N notification service with bearer token support."""
    
    def setup_method(self):
        """Set up test fixtures."""
        self.mock_n8n_client = AsyncMock()
        self.notification_service = N8NNotificationService(self.mock_n8n_client)
    
    @pytest.mark.asyncio
    async def test_send_notification_without_bearer_token(self):
        """Test sending notification without bearer token."""
        # Setup mock response
        mock_response = WebhooksResponse(acknowledged=True)
        self.mock_n8n_client.post_completion_event.return_value = mock_response
        
        result = await self.notification_service.send_job_completion_notification(
            job_id="job-123",
            status="completed",
            processing_time=45.5
        )
        
        # Verify N8N client was called correctly
        self.mock_n8n_client.post_completion_event.assert_called_once()
        call_args = self.mock_n8n_client.post_completion_event.call_args
        
        # Check the request data
        request_data = call_args[0][0]  # First positional argument
        assert request_data.job_id == "job-123"
        assert "completed" in request_data.message
        assert "45.50s" in request_data.message
        
        # Check bearer token (should be None)
        bearer_token = call_args[0][1] if len(call_args[0]) > 1 else call_args[1].get('bearer_token')
        assert bearer_token is None
        
        assert result.acknowledged is True
    
    @pytest.mark.asyncio
    async def test_send_notification_with_bearer_token(self):
        """Test sending notification with bearer token."""
        # Setup mock response
        mock_response = WebhooksResponse(acknowledged=True)
        self.mock_n8n_client.post_completion_event.return_value = mock_response
        
        bearer_token = "client-token-abc123"
        
        result = await self.notification_service.send_job_completion_notification(
            job_id="job-456",
            status="failed",
            processing_time=30.2,
            bearer_token=bearer_token
        )
        
        # Verify N8N client was called with bearer token
        self.mock_n8n_client.post_completion_event.assert_called_once()
        call_args = self.mock_n8n_client.post_completion_event.call_args
        
        # Check the request data
        request_data = call_args[0][0]
        assert request_data.job_id == "job-456"
        assert "failed" in request_data.message
        assert "30.20s" in request_data.message
        
        # Check bearer token was passed
        passed_token = call_args[0][1] if len(call_args[0]) > 1 else call_args[1].get('bearer_token')
        assert passed_token == bearer_token
        
        assert result.acknowledged is True
    
    @pytest.mark.asyncio
    async def test_send_notification_n8n_failure_handling(self):
        """Test handling of N8N client failures."""
        # Setup mock to raise exception
        self.mock_n8n_client.post_completion_event.side_effect = Exception("N8N connection failed")
        
        # Should not raise exception, but return acknowledged=False
        result = await self.notification_service.send_job_completion_notification(
            job_id="job-789",
            status="completed",
            processing_time=60.0,
            bearer_token="test-token"
        )
        
        assert result.acknowledged is False
        self.mock_n8n_client.post_completion_event.assert_called_once()
    
    @pytest.mark.asyncio
    async def test_notification_message_format(self):
        """Test that notification messages are formatted correctly."""
        mock_response = WebhooksResponse(acknowledged=True)
        self.mock_n8n_client.post_completion_event.return_value = mock_response
        
        await self.notification_service.send_job_completion_notification(
            job_id="format-test-job",
            status="completed",
            processing_time=123.456,
            bearer_token="format-token"
        )
        
        # Check message format
        call_args = self.mock_n8n_client.post_completion_event.call_args
        request_data = call_args[0][0]
        
        expected_message = "Job format-test-job completed in 123.46s"
        assert request_data.message == expected_message
        assert request_data.job_id == "format-test-job"


class TestBearerTokenFlow:
    """Test the complete bearer token flow from job to N8N."""
    
    @pytest.mark.asyncio
    async def test_complete_bearer_token_flow(self):
        """Test the complete flow of bearer token from job to N8N notification."""
        # Mock components
        mock_job_repo = AsyncMock()
        mock_n8n_client = AsyncMock()
        
        # Setup job record with bearer token
        mock_job_record = Mock()
        mock_job_record.bearer_token = "client-auth-token-123"
        mock_job_repo.get.return_value = mock_job_record
        
        # Setup N8N response
        mock_n8n_client.post_completion_event.return_value = WebhooksResponse(acknowledged=True)
        
        # Create notification service
        notification_service = N8NNotificationService(mock_n8n_client)
        
        # Simulate the flow
        job_id = "test-job-flow"
        
        # 1. Get job record (simulating ProcessJobUseCase)
        job_record = await mock_job_repo.get(job_id)
        bearer_token = job_record.bearer_token
        
        # 2. Send notification with bearer token
        result = await notification_service.send_job_completion_notification(
            job_id=job_id,
            status="completed",
            processing_time=88.7,
            bearer_token=bearer_token
        )
        
        # 3. Clear bearer token (simulating repository cleanup)
        await mock_job_repo.clear_bearer_token(job_id)
        
        # Verify the flow
        mock_job_repo.get.assert_called_once_with(job_id)
        mock_n8n_client.post_completion_event.assert_called_once()
        mock_job_repo.clear_bearer_token.assert_called_once_with(job_id)
        
        # Verify N8N call included bearer token
        call_args = mock_n8n_client.post_completion_event.call_args
        passed_token = call_args[0][1] if len(call_args[0]) > 1 else call_args[1].get('bearer_token')
        assert passed_token == "client-auth-token-123"
        
        assert result.acknowledged is True
    
    @pytest.mark.asyncio
    async def test_bearer_token_flow_without_token(self):
        """Test the flow when job has no bearer token."""
        # Mock components
        mock_job_repo = AsyncMock()
        mock_n8n_client = AsyncMock()
        
        # Setup job record without bearer token
        mock_job_record = Mock()
        mock_job_record.bearer_token = None
        mock_job_repo.get.return_value = mock_job_record
        
        # Setup N8N response
        mock_n8n_client.post_completion_event.return_value = WebhooksResponse(acknowledged=True)
        
        # Create notification service
        notification_service = N8NNotificationService(mock_n8n_client)
        
        # Simulate the flow
        job_id = "test-job-no-token"
        
        # Get job and send notification
        job_record = await mock_job_repo.get(job_id)
        bearer_token = job_record.bearer_token
        
        result = await notification_service.send_job_completion_notification(
            job_id=job_id,
            status="completed",
            processing_time=25.3,
            bearer_token=bearer_token
        )
        
        # Verify N8N call was made without bearer token
        call_args = mock_n8n_client.post_completion_event.call_args
        passed_token = call_args[0][1] if len(call_args[0]) > 1 else call_args[1].get('bearer_token')
        assert passed_token is None
        
        assert result.acknowledged is True
    
    def test_notification_service_protocol_compliance(self):
        """Test that N8NNotificationService implements the protocol correctly."""
        from domain.services.notification_service import NotificationService
        
        # Create instance
        mock_client = Mock()
        service = N8NNotificationService(mock_client)
        
        # Verify it implements the protocol
        assert isinstance(service, NotificationService)
        
        # Verify method signature
        import inspect
        sig = inspect.signature(service.send_job_completion_notification)
        params = list(sig.parameters.keys())
        
        expected_params = ['job_id', 'status', 'processing_time', 'bearer_token']
        assert params == expected_params
        
        # Verify bearer_token has default None
        bearer_token_param = sig.parameters['bearer_token']
        assert bearer_token_param.default is None