#!/usr/bin/env python3
"""
CAE Mesh Generator Application Launcher
"""
import os
import sys
from pathlib import Path

def check_dependencies():
    """Check if required dependencies are available"""
    required_packages = [
        'flask',
        'werkzeug'
    ]
    
    missing_packages = []
    for package in required_packages:
        try:
            __import__(package)
        except ImportError:
            missing_packages.append(package)
    
    if missing_packages:
        print(f"Missing required packages: {', '.join(missing_packages)}")
        print("Please install them using: pip install -r requirements.txt")
        return False
    
    return True

def setup_directories():
    """Create necessary directories if they don't exist"""
    directories = [
        'uploads',
        'results',
        'temp',
        'static/css',
        'static/js',
        'templates'
    ]
    
    for directory in directories:
        Path(directory).mkdir(parents=True, exist_ok=True)
        print(f"✓ Directory '{directory}' ready")

def main():
    """Main application launcher"""
    print("=" * 50)
    print("CAE Mesh Generator - Starting Application")
    print("=" * 50)
    
    # Check dependencies
    print("\n1. Checking dependencies...")
    if not check_dependencies():
        sys.exit(1)
    print("✓ All dependencies available")
    
    # Setup directories
    print("\n2. Setting up directories...")
    setup_directories()
    
    # Check if ANSYS is available (optional)
    print("\n3. Checking ANSYS availability...")
    try:
        import ansys.mechanical.core as mech
        print("✓ ANSYS Mechanical available")
    except ImportError:
        print("⚠ ANSYS Mechanical not available - running in demo mode")
    
    # Start Flask application
    print("\n4. Starting Flask application...")
    print("Application will be available at: http://localhost:5000")
    print("Press Ctrl+C to stop the application")
    print("-" * 50)
    
    try:
        # 添加项目根目录到Python路径
        project_root = Path(__file__).parent.parent
        sys.path.insert(0, str(project_root))
        
        from app import create_app
        app = create_app()
        app.run(host='0.0.0.0', port=5000, debug=True)
    except KeyboardInterrupt:
        print("\n\nApplication stopped by user")
    except Exception as e:
        print(f"\nError starting application: {e}")
        sys.exit(1)

if __name__ == '__main__':
    main()