import os

class Config:
    """基础配置类"""
    SECRET_KEY = os.environ.get('SECRET_KEY') or 'dev-secret-key'
    REDIS_HOST = os.environ.get('REDIS_HOST', 'localhost')
    REDIS_PORT = int(os.environ.get('REDIS_PORT', 6379))
    REDIS_DB = int(os.environ.get('REDIS_DB', 0))
    REDIS_PASSWORD = os.environ.get('REDIS_PASSWORD', None)
    CACHE_PREFIX = os.environ.get('CACHE_PREFIX', 'sku_analysis')

class DevelopmentConfig(Config):
    """开发环境配置"""
    DEBUG = True

class TestingConfig(Config):
    """测试环境配置"""
    TESTING = True
    DEBUG = True

class ProductionConfig(Config):
    """生产环境配置"""
    DEBUG = False

config = {
    'development': DevelopmentConfig,
    'testing': TestingConfig,
    'production': ProductionConfig,
    'default': DevelopmentConfig
}