"""
Flask应用工厂
"""
import logging
from flask import Flask
from .config import DEBUG, HOST, PORT
from .routes.main import register_main_routes

def create_app():
    """创建Flask应用实例"""
    app = Flask(__name__,
                static_folder='../static',
                template_folder='templates')
    
    # 配置
    app.config['DEBUG'] = DEBUG
    
    # 配置日志
    configure_logging(app)
    
    # 注册路由
    register_main_routes(app)
    
    return app

def configure_logging(app):
    """配置日志"""
    if not app.debug:
        # 在生产环境中，将日志输出到文件
        import logging
        import os
        from logging.handlers import RotatingFileHandler
        
        # 日志目录
        log_dir = './logs'
        if not os.path.exists(log_dir):
            os.makedirs(log_dir)
        
        log_file = os.path.join(log_dir, 'multi_camera.log')
        file_handler = RotatingFileHandler(log_file, maxBytes=10240, backupCount=10)
        file_handler.setFormatter(logging.Formatter(
            '%(asctime)s - %(levelname)s - %(message)s'
        ))
        file_handler.setLevel(logging.INFO)
        app.logger.addHandler(file_handler)
        app.logger.setLevel(logging.INFO)
        app.logger.info('多摄像头监控系统启动')