#!/usr/bin/env python3
"""
Production simulation test to validate all deployment fixes.
Simulates the HuggingFace Spaces environment and tests the complete system.
"""

import os
import sys
import time
import subprocess
import threading
import requests
from datetime import datetime

# Add the parent directory to Python path
current_dir = os.path.dirname(os.path.abspath(__file__))
sys.path.insert(0, current_dir)

class ProductionSimulator:
    def __init__(self):
        self.original_env = {}
        self.test_results = {}
        
    def setup_production_environment(self):
        """Set up environment variables to simulate HuggingFace Spaces deployment."""
        print("🔧 Setting up production environment simulation...")
        
        # Store original environment
        env_vars_to_set = {
            "AUTO_INGEST": "true",
            "LANGUAGE_FILTER": "English", 
            "PORT": "7860",
            "HF_HOME": "/tmp/huggingface",
            "TRANSFORMERS_CACHE": "/tmp/transformers",
            "VECTOR_PERSIST_DIR": "/tmp/vector_db"
        }
        
        for key, value in env_vars_to_set.items():
            self.original_env[key] = os.environ.get(key)
            os.environ[key] = value
            print(f"   ✅ {key}={value}")
    
    def cleanup_environment(self):
        """Restore original environment."""
        print("🧹 Cleaning up environment...")
        for key, original_value in self.original_env.items():
            if original_value is None:
                os.environ.pop(key, None)
            else:
                os.environ[key] = original_value
    
    def test_app_initialization(self):
        """Test Flask app initialization with production settings."""
        print("\n🔍 Testing App Initialization...")
        
        try:
            # Clear any existing lock files
            lock_file = "/tmp/ingest.lock" if os.name != 'nt' else "ingest.lock"
            if os.path.exists(lock_file):
                os.remove(lock_file)
                print("   🗑️ Cleared existing lock file")
            
            # Import and test app components
            from cve_factchecker.app import app, _safe_initialize_system, INGEST_STATUS, AUTO_INGEST
            
            print(f"   📊 AUTO_INGEST: {AUTO_INGEST}")
            print(f"   📊 INGEST_STATUS: {INGEST_STATUS}")
            
            # Test system initialization
            _safe_initialize_system()
            print("   ✅ System initialization completed")
            
            # Check if background thread should start
            from cve_factchecker.app import should_start_ingestion
            print(f"   📊 Should start ingestion: {should_start_ingestion}")
            
            self.test_results["app_initialization"] = {
                "success": True,
                "auto_ingest_enabled": AUTO_INGEST,
                "ingestion_status": INGEST_STATUS.copy()
            }
            
        except Exception as e:
            print(f"   ❌ App initialization failed: {e}")
            self.test_results["app_initialization"] = {
                "success": False,
                "error": str(e)
            }
            return False
        
        return True
    
    def test_health_endpoint_behavior(self):
        """Test the enhanced health endpoint."""
        print("\n🔍 Testing Health Endpoint...")
        
        try:
            from cve_factchecker.app import app
            
            with app.test_client() as client:
                # Test basic health check
                response = client.get('/health')
                health_data = response.get_json()
                
                print(f"   📊 Health Status: {health_data.get('status')}")
                print(f"   📊 Vector Store Populated: {health_data.get('vector_store_populated', 'unknown')}")
                print(f"   📊 Sample Documents: {health_data.get('sample_documents', 0)}")
                
                # Test ingestion trigger if vector store is empty
                if not health_data.get('vector_store_populated', False):
                    print("   🔄 Testing ingestion trigger...")
                    trigger_response = client.get('/health?trigger_ingestion=true')
                    trigger_data = trigger_response.get_json()
                    print(f"   📊 Trigger Response: {trigger_data.get('message', 'No message')}")
                
                self.test_results["health_endpoint"] = {
                    "success": True,
                    "health_data": health_data,
                    "trigger_tested": not health_data.get('vector_store_populated', False)
                }
                
        except Exception as e:
            print(f"   ❌ Health endpoint test failed: {e}")
            self.test_results["health_endpoint"] = {
                "success": False,
                "error": str(e)
            }
            return False
            
        return True
    
    def test_background_ingestion_flow(self):
        """Test the complete background ingestion flow."""
        print("\n🔍 Testing Background Ingestion Flow...")
        
        try:
            from cve_factchecker.app import _background_ingest, INGEST_STATUS, _cleanup_stale_locks
            
            # Test stale lock cleanup
            print("   🧹 Testing stale lock cleanup...")
            _cleanup_stale_locks()
            
            # Reset ingestion status
            INGEST_STATUS.update({"finished": False, "test_mode": True})
            
            # Run background ingestion in test mode
            print("   🚀 Running background ingestion...")
            start_time = time.time()
            
            # Use a thread to avoid blocking
            ingestion_thread = threading.Thread(target=_background_ingest, daemon=True)
            ingestion_thread.start()
            
            # Wait for completion with timeout
            timeout = 60  # 1 minute timeout
            while not INGEST_STATUS.get("finished") and (time.time() - start_time) < timeout:
                time.sleep(1)
                print(f"   ⏳ Waiting for ingestion... ({time.time() - start_time:.0f}s)")
            
            ingestion_time = time.time() - start_time
            
            if INGEST_STATUS.get("finished"):
                print(f"   ✅ Ingestion completed in {ingestion_time:.1f}s")
                print(f"   📊 Synced articles: {INGEST_STATUS.get('synced', 0)}")
                
                if INGEST_STATUS.get("error"):
                    print(f"   ⚠️ Ingestion error: {INGEST_STATUS.get('error')}")
                
                self.test_results["background_ingestion"] = {
                    "success": True,
                    "completion_time": ingestion_time,
                    "final_status": INGEST_STATUS.copy()
                }
            else:
                print(f"   ❌ Ingestion timed out after {timeout}s")
                self.test_results["background_ingestion"] = {
                    "success": False,
                    "error": "Timeout",
                    "partial_status": INGEST_STATUS.copy()
                }
                return False
                
        except Exception as e:
            print(f"   ❌ Background ingestion test failed: {e}")
            self.test_results["background_ingestion"] = {
                "success": False,
                "error": str(e)
            }
            return False
            
        return True
    
    def test_fact_checking_after_ingestion(self):
        """Test fact-checking functionality after ingestion."""
        print("\n🔍 Testing Fact-Checking After Ingestion...")
        
        try:
            from cve_factchecker.app import app
            
            with app.test_client() as client:
                test_claims = [
                    "Security researchers discovered a new vulnerability",
                    "Cyberattack hits major corporation",
                    "Malware targets government systems"
                ]
                
                for claim in test_claims:
                    print(f"   🔍 Testing claim: {claim[:50]}...")
                    
                    response = client.post('/fact-check', json={"claim": claim})
                    result = response.get_json()
                    
                    print(f"      📊 Verdict: {result.get('verdict', 'Unknown')}")
                    print(f"      📊 Sources: {result.get('sources_used', 0)}")
                    print(f"      📊 Confidence: {result.get('confidence', 0)}")
                    
                    if result.get('verdict') not in ['ERROR', 'INITIALIZING']:
                        print(f"      ✅ Fact-check working")
                        break
                else:
                    print(f"      ❌ No successful fact-checks")
                    return False
                
                self.test_results["fact_checking"] = {
                    "success": True,
                    "test_claims": len(test_claims),
                    "sample_result": result
                }
                
        except Exception as e:
            print(f"   ❌ Fact-checking test failed: {e}")
            self.test_results["fact_checking"] = {
                "success": False,
                "error": str(e)
            }
            return False
            
        return True
    
    def test_production_simulation(self):
        """Run complete production simulation test."""
        print("🏭 CVE Fact Checker - Production Simulation Test")
        print("=" * 80)
        
        success = True
        
        try:
            self.setup_production_environment()
            
            # Run tests in sequence
            tests = [
                ("App Initialization", self.test_app_initialization),
                ("Health Endpoint", self.test_health_endpoint_behavior),
                ("Background Ingestion", self.test_background_ingestion_flow),
                ("Fact-Checking", self.test_fact_checking_after_ingestion)
            ]
            
            for test_name, test_func in tests:
                print(f"\n{'='*20} {test_name} {'='*20}")
                test_success = test_func()
                success = success and test_success
                
                if not test_success:
                    print(f"❌ {test_name} failed - stopping tests")
                    break
                else:
                    print(f"✅ {test_name} passed")
        
        finally:
            self.cleanup_environment()
        
        return success
    
    def print_summary(self):
        """Print test summary."""
        print("\n📋 Production Simulation Summary")
        print("=" * 50)
        
        total_tests = len(self.test_results)
        passed_tests = sum(1 for result in self.test_results.values() if result.get("success"))
        
        print(f"Tests Run: {total_tests}")
        print(f"Tests Passed: {passed_tests}")
        print(f"Tests Failed: {total_tests - passed_tests}")
        
        for test_name, result in self.test_results.items():
            status = "✅ PASS" if result.get("success") else "❌ FAIL"
            print(f"{status} {test_name.replace('_', ' ').title()}")
            
            if not result.get("success") and result.get("error"):
                print(f"    Error: {result['error']}")
        
        overall_success = passed_tests == total_tests
        print(f"\nOverall Result: {'✅ SUCCESS' if overall_success else '❌ FAILURE'}")
        
        return overall_success

def main():
    """Main test function."""
    simulator = ProductionSimulator()
    
    try:
        success = simulator.test_production_simulation()
        simulator.print_summary()
        
        if success:
            print("\n🎉 Production simulation successful!")
            print("💡 System is ready for deployment to HuggingFace Spaces")
        else:
            print("\n🚨 Production simulation failed!")
            print("💡 Issues need to be resolved before deployment")
        
        return success
        
    except KeyboardInterrupt:
        print("\n⏹️ Test interrupted by user")
        return False
    except Exception as e:
        print(f"\n❌ Test suite failed: {e}")
        return False

if __name__ == "__main__":
    success = main()
    sys.exit(0 if success else 1)