from flask import Flask
from flask_cors import CORS
from routes.langgraph_routes import bp as langgraph_bp
from config.web_config import WEB_CONFIG

def create_app():
    """应用工厂函数"""
    app = Flask(__name__)
    
    # 应用配置
    app.config['SECRET_KEY'] = WEB_CONFIG['secret_key']
    app.config['SESSION_TYPE'] = WEB_CONFIG['session_type']
    app.config['SESSION_PERMANENT'] = WEB_CONFIG['session_permanent']
    app.config['SESSION_USE_SIGNER'] = WEB_CONFIG['session_use_signer']
    app.config['SESSION_KEY_PREFIX'] = WEB_CONFIG['session_key_prefix']
    app.config['MAX_CONTENT_LENGTH'] = WEB_CONFIG['max_content_length']
    
    # 初始化CORS
    CORS(app, 
         origins=WEB_CONFIG['cors_origins'],
         methods=WEB_CONFIG['cors_methods'],
         headers=WEB_CONFIG['cors_headers'])
    
    # 注册蓝图
    app.register_blueprint(langgraph_bp, url_prefix=WEB_CONFIG['api_prefix'])
    
    @app.route('/health')
    def health_check():
        """健康检查端点"""
        return {'status': 'healthy', 'message': 'LangGraph Web Service is running'}
    
    return app

if __name__ == '__main__':
    app = create_app()
    app.run(
        host=WEB_CONFIG['host'],
        port=WEB_CONFIG['port'],
        debug=WEB_CONFIG['debug']
    )