"""
Simple validation tests for the new LLM service integration.
Tests basic functionality without complex mocking.
"""
import pytest
from httpx import AsyncClient
from unittest.mock import patch, MagicMock


class TestLLMServiceValidation:
    """Basic validation tests for LLM service integration."""

    @pytest.mark.asyncio
    async def test_llm_models_endpoint_exists(self, client: AsyncClient):
        """Test that the LLM models endpoint exists and is accessible."""
        response = await client.get(
            "/api/v1/llm/models",
            headers={"Authorization": "Bearer test-api-key"}
        )
        
        # Should not return 404 (endpoint exists)
        assert response.status_code != 404
        # May return 500 or other error due to missing LLM service, but endpoint exists

    @pytest.mark.asyncio
    async def test_llm_chat_endpoint_exists(self, client: AsyncClient):
        """Test that the LLM chat endpoint exists and is accessible."""
        response = await client.post(
            "/api/v1/llm/chat/completions",
            json={
                "model": "test-model",
                "messages": [
                    {"role": "user", "content": "Hello"}
                ]
            },
            headers={"Authorization": "Bearer test-api-key"}
        )
        
        # Should not return 404 (endpoint exists)
        assert response.status_code != 404

    @pytest.mark.asyncio
    async def test_llm_embeddings_endpoint_exists(self, client: AsyncClient):
        """Test that the LLM embeddings endpoint exists and is accessible."""
        response = await client.post(
            "/api/v1/llm/embeddings",
            json={
                "model": "test-embedding-model",
                "input": "Test text"
            },
            headers={"Authorization": "Bearer test-api-key"}
        )
        
        # Should not return 404 (endpoint exists)
        assert response.status_code != 404

    @pytest.mark.asyncio
    async def test_llm_provider_status_endpoint_exists(self, client: AsyncClient):
        """Test that the provider status endpoint exists and is accessible."""
        response = await client.get(
            "/api/v1/llm/providers/status",
            headers={"Authorization": "Bearer test-api-key"}
        )
        
        # Should not return 404 (endpoint exists)
        assert response.status_code != 404

    @pytest.mark.asyncio
    async def test_chat_with_mocked_service(self, client: AsyncClient):
        """Test chat completion with mocked LLM service."""
        from app.services.llm.models import ChatResponse, ChatChoice, ChatMessage, TokenUsage
        
        # Mock successful response
        mock_response = ChatResponse(
            id="test-123",
            object="chat.completion",
            created=1234567890,
            model="privatemode-llama-3-70b",
            provider="PrivateMode.ai",
            choices=[
                ChatChoice(
                    index=0,
                    message=ChatMessage(
                        role="assistant",
                        content="Hello! How can I help you?"
                    ),
                    finish_reason="stop"
                )
            ],
            usage=TokenUsage(
                prompt_tokens=10,
                completion_tokens=8,
                total_tokens=18
            ),
            security_check=True,
            risk_score=0.1,
            detected_patterns=[],
            latency_ms=250.5
        )
        
        with patch("app.services.llm.service.llm_service.create_chat_completion") as mock_chat:
            mock_chat.return_value = mock_response
            
            response = await client.post(
                "/api/v1/llm/chat/completions",
                json={
                    "model": "privatemode-llama-3-70b",
                    "messages": [
                        {"role": "user", "content": "Hello"}
                    ]
                },
                headers={"Authorization": "Bearer test-api-key"}
            )
        
        assert response.status_code == 200
        data = response.json()
        
        # Verify basic response structure
        assert "id" in data
        assert "choices" in data
        assert len(data["choices"]) == 1
        assert data["choices"][0]["message"]["content"] == "Hello! How can I help you?"

    @pytest.mark.asyncio
    async def test_embedding_with_mocked_service(self, client: AsyncClient):
        """Test embedding generation with mocked LLM service."""
        from app.services.llm.models import EmbeddingResponse, EmbeddingData, TokenUsage
        
        # Create a simple embedding vector
        embedding_vector = [0.1, 0.2, 0.3] * 341 + [0.1, 0.2, 0.3]  # 1024 dimensions
        
        mock_response = EmbeddingResponse(
            object="list",
            data=[
                EmbeddingData(
                    object="embedding",
                    index=0,
                    embedding=embedding_vector
                )
            ],
            model="privatemode-embeddings",
            provider="PrivateMode.ai",
            usage=TokenUsage(
                prompt_tokens=5,
                completion_tokens=0,
                total_tokens=5
            ),
            security_check=True,
            risk_score=0.0,
            latency_ms=150.0
        )
        
        with patch("app.services.llm.service.llm_service.create_embedding") as mock_embedding:
            mock_embedding.return_value = mock_response
            
            response = await client.post(
                "/api/v1/llm/embeddings",
                json={
                    "model": "privatemode-embeddings",
                    "input": "Test text for embedding"
                },
                headers={"Authorization": "Bearer test-api-key"}
            )
        
        assert response.status_code == 200
        data = response.json()
        
        # Verify basic response structure
        assert "data" in data
        assert len(data["data"]) == 1
        assert len(data["data"][0]["embedding"]) == 1024

    @pytest.mark.asyncio
    async def test_models_with_mocked_service(self, client: AsyncClient):
        """Test models listing with mocked LLM service."""
        from app.services.llm.models import ModelInfo
        
        mock_models = [
            ModelInfo(
                id="privatemode-llama-3-70b",
                object="model",
                created=1234567890,
                owned_by="PrivateMode.ai",
                provider="PrivateMode.ai",
                capabilities=["tee", "chat"],
                context_window=32768,
                supports_streaming=True
            ),
            ModelInfo(
                id="privatemode-embeddings",
                object="model",
                created=1234567890,
                owned_by="PrivateMode.ai",
                provider="PrivateMode.ai",
                capabilities=["tee", "embeddings"],
                context_window=512,
                supports_streaming=False
            )
        ]
        
        with patch("app.services.llm.service.llm_service.get_models") as mock_models_call:
            mock_models_call.return_value = mock_models
            
            response = await client.get(
                "/api/v1/llm/models",
                headers={"Authorization": "Bearer test-api-key"}
            )
        
        assert response.status_code == 200
        data = response.json()
        
        # Verify basic response structure
        assert "data" in data
        assert len(data["data"]) == 2
        assert data["data"][0]["id"] == "privatemode-llama-3-70b"

    @pytest.mark.asyncio
    async def test_provider_status_with_mocked_service(self, client: AsyncClient):
        """Test provider status with mocked LLM service."""
        mock_status = {
            "privatemode": {
                "provider": "PrivateMode.ai",
                "status": "healthy",
                "latency_ms": 250.5,
                "success_rate": 0.98,
                "last_check": "2025-01-01T12:00:00Z",
                "models_available": ["privatemode-llama-3-70b", "privatemode-embeddings"]
            }
        }
        
        with patch("app.services.llm.service.llm_service.get_provider_status") as mock_provider:
            mock_provider.return_value = mock_status
            
            response = await client.get(
                "/api/v1/llm/providers/status",
                headers={"Authorization": "Bearer test-api-key"}
            )
        
        assert response.status_code == 200
        data = response.json()
        
        # Verify basic response structure
        assert "data" in data
        assert "privatemode" in data["data"]
        assert data["data"]["privatemode"]["status"] == "healthy"

    @pytest.mark.asyncio
    async def test_unauthorized_access(self, client: AsyncClient):
        """Test that unauthorized requests are properly rejected."""
        # Test without authorization header
        response = await client.get("/api/v1/llm/models")
        assert response.status_code == 401
        
        response = await client.post(
            "/api/v1/llm/chat/completions",
            json={
                "model": "test-model",
                "messages": [{"role": "user", "content": "Hello"}]
            }
        )
        assert response.status_code == 401
        
        response = await client.post(
            "/api/v1/llm/embeddings",
            json={
                "model": "test-model",
                "input": "Hello"
            }
        )
        assert response.status_code == 401

    @pytest.mark.asyncio
    async def test_invalid_request_data(self, client: AsyncClient):
        """Test that invalid request data is properly handled."""
        # Test invalid JSON structure
        response = await client.post(
            "/api/v1/llm/chat/completions",
            json={
                # Missing required fields
                "model": "test-model"
                # messages field is missing
            },
            headers={"Authorization": "Bearer test-api-key"}
        )
        assert response.status_code == 422  # Unprocessable Entity
        
        # Test empty messages
        response = await client.post(
            "/api/v1/llm/chat/completions", 
            json={
                "model": "test-model",
                "messages": []  # Empty messages
            },
            headers={"Authorization": "Bearer test-api-key"}
        )
        assert response.status_code == 422  # Unprocessable Entity