#!/usr/bin/env python3
"""
Simple test script to verify the PDF OCR Service setup
Run this to check if everything is working properly
"""

import sys
import os
from pathlib import Path

def test_imports():
    """Test if all required modules can be imported"""
    print("🧪 Testing imports...")
    
    required_imports = [
        ('dotenv', 'python-dotenv'),
        ('gradio', 'gradio'),
        ('azure.ai.documentintelligence', 'azure-ai-documentintelligence'),
        ('azure.core', 'azure-core'),
        ('fitz', 'PyMuPDF'),
        ('PIL', 'Pillow'),
        ('cv2', 'opencv-python'),
        ('numpy', 'numpy'),
    ]
    
    optional_imports = [
        ('pytesseract', 'pytesseract'),
        ('docx', 'python-docx'),
    ]
    
    all_good = True
    
    # Test required imports
    for module, package in required_imports:
        try:
            __import__(module)
            print(f"✅ {package}")
        except ImportError:
            print(f"❌ {package} - Run: pip install {package}")
            all_good = False
    
    # Test optional imports
    for module, package in optional_imports:
        try:
            __import__(module)
            print(f"✅ {package} (optional)")
        except ImportError:
            print(f"⚠️  {package} (optional) - Run: pip install {package}")
    
    return all_good

def test_files():
    """Test if all required files exist"""
    print("\n📁 Testing files...")
    
    required_files = ['ocr_service.py', 'backend.py', 'requirements.txt', '.env']
    
    # Check for UI file (either ui.py or app.py)
    ui_file = None
    if Path('ui.py').exists():
        ui_file = 'ui.py'
    elif Path('app.py').exists():
        ui_file = 'app.py'
    
    all_good = True
    for file in required_files:
        if Path(file).exists():
            print(f"✅ {file}")
        else:
            print(f"❌ {file} missing")
            all_good = False
    
    # Check UI file
    if ui_file:
        print(f"✅ {ui_file} (UI file)")
    else:
        print("❌ UI file missing (need either ui.py or app.py)")
        all_good = False
    
    return all_good

def test_env_config():
    """Test environment configuration"""
    print("\n🔧 Testing environment...")
    
    try:
        from dotenv import load_dotenv
        load_dotenv()
        
        endpoint = os.getenv('AZURE_DOCUMENT_INTELLIGENCE_ENDPOINT')
        key = os.getenv('AZURE_DOCUMENT_INTELLIGENCE_KEY')
        
        if endpoint and key:
            if endpoint.startswith('https://') and endpoint.endswith('/'):
                print("✅ Azure endpoint configured properly")
            else:
                print("⚠️  Azure endpoint format may be incorrect")
            
            if len(key) > 20:
                print("✅ Azure key configured")
            else:
                print("⚠️  Azure key may be incorrect")
            
            return True
        else:
            print("⚠️  Azure credentials not configured")
            print("   Update your .env file with valid credentials")
            return False
            
    except ImportError:
        print("❌ python-dotenv not available")
        return False

def test_service():
    """Test if the service can be imported and initialized"""
    print("\n🚀 Testing service initialization...")
    
    try:
        from backend import BackendManager
        manager = BackendManager()
        
        methods = manager.get_available_methods()
        print(f"✅ Service initialized successfully")
        print(f"   Available methods: {methods}")
        
        if 'azure' in methods:
            print("✅ Azure OCR ready")
        else:
            print("⚠️  Azure OCR not available (check credentials)")
        
        return True
        
    except Exception as e:
        print(f"❌ Service initialization failed: {e}")
        return False

def main():
    """Run all tests"""
    print("🧪 PDF OCR Service Setup Test")
    print("=" * 40)
    
    tests = [
        ("Import test", test_imports),
        ("File test", test_files),
        ("Environment test", test_env_config),
        ("Service test", test_service),
    ]
    
    results = {}
    for test_name, test_func in tests:
        print(f"\n{'='*40}")
        print(f"{test_name.upper()}")
        print('='*40)
        results[test_name] = test_func()
    
    # Summary
    print(f"\n{'='*40}")
    print("TEST SUMMARY")
    print('='*40)
    
    all_passed = True
    for test_name, passed in results.items():
        status = "✅ PASS" if passed else "❌ FAIL"
        print(f"{status} {test_name}")
        if not passed:
            all_passed = False
    
    print('='*40)
    if all_passed:
        print("🎉 All tests passed! You can run the service with:")
        print("   python ui.py")
    else:
        print("⚠️  Some tests failed. Please fix the issues above.")
        print("\nQuick fixes:")
        print("1. Install missing packages: pip install -r requirements.txt")
        print("2. Configure your .env file with Azure credentials")
        print("3. Ensure all files are present")
    
    return all_passed

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