"""
Regression tests for API endpoints
"""

import pytest
import json
from fastapi.testclient import TestClient
from unittest.mock import patch, AsyncMock
from httpx import AsyncClient

@pytest.mark.api
class TestHealthEndpoints:
    """Test health check endpoints"""
    
    def test_health_check(self, client: TestClient):
        """Test basic health check endpoint"""
        response = client.get("/health")
        assert response.status_code == 200
        
        data = response.json()
        assert data["status"] == "healthy"
        assert "timestamp" in data
        assert data["service"] == "merchant-api"
        assert data["version"] == "1.0.0"
    
    @patch('app.nosql.check_mongodb_health')
    @patch('app.nosql.check_redis_health')
    def test_readiness_check_healthy(self, mock_redis, mock_mongo, client: TestClient):
        """Test readiness check when databases are healthy"""
        mock_mongo.return_value = True
        mock_redis.return_value = True
        
        response = client.get("/ready")
        assert response.status_code == 200
        
        data = response.json()
        assert data["status"] == "ready"
        assert data["databases"]["mongodb"] == "healthy"
        assert data["databases"]["redis"] == "healthy"
    
    @patch('app.nosql.check_mongodb_health')
    @patch('app.nosql.check_redis_health')
    def test_readiness_check_unhealthy(self, mock_redis, mock_mongo, client: TestClient):
        """Test readiness check when databases are unhealthy"""
        mock_mongo.return_value = False
        mock_redis.return_value = True
        
        response = client.get("/ready")
        assert response.status_code == 503
        
        data = response.json()
        assert "not_ready" in data["detail"]["status"]

class TestMerchantEndpoints:
    """Test merchant-related endpoints"""
    
    @patch('app.services.merchant.get_merchants')
    def test_get_merchants_success(self, mock_get_merchants, client: TestClient, sample_merchant_data):
        """Test successful merchant retrieval"""
        mock_get_merchants.return_value = [sample_merchant_data]
        
        response = client.get("/api/v1/merchants/")
        assert response.status_code == 200
        
        data = response.json()
        assert len(data) == 1
        assert data[0]["name"] == "Test Hair Salon"
        assert data[0]["category"] == "salon"
    
    @patch('app.services.merchant.get_merchant_by_id')
    def test_get_merchant_by_id_success(self, mock_get_merchant, client: TestClient, sample_merchant_data):
        """Test successful merchant retrieval by ID"""
        mock_get_merchant.return_value = sample_merchant_data
        
        response = client.get("/api/v1/merchants/test_merchant_123")
        assert response.status_code == 200
        
        data = response.json()
        assert data["_id"] == "test_merchant_123"
        assert data["name"] == "Test Hair Salon"
    
    @patch('app.services.merchant.get_merchant_by_id')
    def test_get_merchant_by_id_not_found(self, mock_get_merchant, client: TestClient):
        """Test merchant not found scenario"""
        mock_get_merchant.return_value = None
        
        response = client.get("/api/v1/merchants/nonexistent_id")
        assert response.status_code == 404
    
    @patch('app.services.merchant.search_merchants')
    def test_search_merchants_with_location(self, mock_search, client: TestClient, sample_merchant_data):
        """Test merchant search with location parameters"""
        mock_search.return_value = [sample_merchant_data]
        
        response = client.get("/api/v1/merchants/search", params={
            "latitude": 40.7128,
            "longitude": -74.0060,
            "radius": 5000,
            "category": "salon"
        })
        
        assert response.status_code == 200
        data = response.json()
        assert len(data) == 1
        assert data[0]["category"] == "salon"
    
    def test_search_merchants_invalid_coordinates(self, client: TestClient):
        """Test merchant search with invalid coordinates"""
        response = client.get("/api/v1/merchants/search", params={
            "latitude": 200,  # Invalid latitude
            "longitude": -74.0060,
            "radius": 5000
        })
        
        assert response.status_code == 400

class TestHelperEndpoints:
    """Test helper service endpoints"""
    
    @patch('app.services.helper.process_free_text')
    def test_process_free_text_success(self, mock_process, client: TestClient):
        """Test successful free text processing"""
        mock_process.return_value = {
            "query": "find a hair salon",
            "extracted_keywords": ["hair", "salon"],
            "suggested_category": "salon",
            "search_parameters": {"category": "salon"}
        }
        
        response = client.post("/api/v1/helpers/process-text", json={
            "text": "find a hair salon",
            "latitude": 40.7128,
            "longitude": -74.0060
        })
        
        assert response.status_code == 200
        data = response.json()
        assert data["suggested_category"] == "salon"
    
    def test_process_free_text_empty_input(self, client: TestClient):
        """Test free text processing with empty input"""
        response = client.post("/api/v1/helpers/process-text", json={
            "text": "",
            "latitude": 40.7128,
            "longitude": -74.0060
        })
        
        assert response.status_code == 400
    
    def test_process_free_text_too_long(self, client: TestClient):
        """Test free text processing with input too long"""
        long_text = "a" * 1001  # Assuming 1000 char limit
        
        response = client.post("/api/v1/helpers/process-text", json={
            "text": long_text,
            "latitude": 40.7128,
            "longitude": -74.0060
        })
        
        assert response.status_code == 400

class TestNLPEndpoints:
    """Test NLP demo endpoints"""
    
    @patch('app.services.advanced_nlp.advanced_nlp_pipeline')
    def test_analyze_query_success(self, mock_pipeline, client: TestClient, mock_nlp_pipeline):
        """Test successful query analysis"""
        mock_pipeline.process_query = mock_nlp_pipeline.process_query
        
        response = client.post("/api/v1/nlp/analyze-query", params={
            "query": "find the best hair salon near me",
            "latitude": 40.7128,
            "longitude": -74.0060
        })
        
        assert response.status_code == 200
        data = response.json()
        assert data["status"] == "success"
        assert "analysis" in data
    
    def test_analyze_query_empty_input(self, client: TestClient):
        """Test query analysis with empty input"""
        response = client.post("/api/v1/nlp/analyze-query", params={
            "query": ""
        })
        
        assert response.status_code == 400
    
    def test_get_supported_intents(self, client: TestClient):
        """Test getting supported intents"""
        response = client.get("/api/v1/nlp/supported-intents")
        assert response.status_code == 200
        
        data = response.json()
        assert data["status"] == "success"
        assert "supported_intents" in data
        assert "SEARCH_SERVICE" in data["supported_intents"]
        assert "FILTER_QUALITY" in data["supported_intents"]
    
    def test_get_supported_entities(self, client: TestClient):
        """Test getting supported entities"""
        response = client.get("/api/v1/nlp/supported-entities")
        assert response.status_code == 200
        
        data = response.json()
        assert data["status"] == "success"
        assert "supported_entities" in data
        assert "services" in data["supported_entities"]
        assert "amenities" in data["supported_entities"]

class TestPerformanceEndpoints:
    """Test performance monitoring endpoints"""
    
    @patch('app.utils.performance_monitor.get_performance_report')
    def test_get_performance_report(self, mock_report, client: TestClient):
        """Test performance report endpoint"""
        mock_report.return_value = {
            "metrics": {
                "total_queries": 100,
                "average_time": 0.5,
                "slow_queries": []
            }
        }
        
        response = client.get("/api/v1/performance/report")
        assert response.status_code == 200
    
    def test_get_metrics(self, client: TestClient):
        """Test metrics endpoint"""
        response = client.get("/metrics")
        # Should return metrics even if some components fail
        assert response.status_code in [200, 500]

class TestSecurityEndpoints:
    """Test security-related functionality"""
    
    def test_cors_headers(self, client: TestClient):
        """Test CORS headers are properly set"""
        response = client.options("/api/v1/merchants/", headers={
            "Origin": "http://localhost:3000",
            "Access-Control-Request-Method": "GET"
        })
        
        # Should allow the request
        assert response.status_code in [200, 204]
    
    def test_invalid_origin_blocked(self, client: TestClient):
        """Test that invalid origins are blocked"""
        response = client.get("/api/v1/merchants/", headers={
            "Origin": "http://malicious-site.com"
        })
        
        # Should still work but without CORS headers for invalid origin
        assert response.status_code == 200
    
    def test_request_size_limit(self, client: TestClient):
        """Test request size limits"""
        large_payload = {"data": "x" * (11 * 1024 * 1024)}  # 11MB
        
        response = client.post("/api/v1/helpers/process-text", json=large_payload)
        # Should be rejected due to size limit
        assert response.status_code in [413, 400]

class TestErrorHandling:
    """Test error handling across endpoints"""
    
    def test_404_for_nonexistent_endpoint(self, client: TestClient):
        """Test 404 for non-existent endpoints"""
        response = client.get("/api/v1/nonexistent")
        assert response.status_code == 404
    
    def test_405_for_wrong_method(self, client: TestClient):
        """Test 405 for wrong HTTP method"""
        response = client.delete("/api/v1/merchants/")
        assert response.status_code == 405
    
    @patch('app.services.merchant.get_merchants')
    def test_500_error_handling(self, mock_get_merchants, client: TestClient):
        """Test 500 error handling"""
        mock_get_merchants.side_effect = Exception("Database error")
        
        response = client.get("/api/v1/merchants/")
        assert response.status_code == 500
    
    def test_malformed_json(self, client: TestClient):
        """Test handling of malformed JSON"""
        response = client.post(
            "/api/v1/helpers/process-text",
            data="invalid json",
            headers={"Content-Type": "application/json"}
        )
        assert response.status_code == 422

class TestAsyncEndpoints:
    """Test async endpoint functionality"""
    
    @pytest.mark.asyncio
    async def test_async_client_health_check(self, async_client: AsyncClient):
        """Test health check with async client"""
        response = await async_client.get("/health")
        assert response.status_code == 200
        
        data = response.json()
        assert data["status"] == "healthy"
    
    @pytest.mark.asyncio
    @patch('app.services.advanced_nlp.advanced_nlp_pipeline')
    async def test_async_nlp_processing(self, mock_pipeline, async_client: AsyncClient, mock_nlp_pipeline):
        """Test async NLP processing"""
        mock_pipeline.process_query = mock_nlp_pipeline.process_query
        
        response = await async_client.post("/api/v1/nlp/analyze-query", params={
            "query": "find a spa"
        })
        
        assert response.status_code == 200
        data = response.json()
        assert data["status"] == "success"