import os
from datetime import timedelta

class Config:
    """应用配置类"""
    
    # Flask配置
    SECRET_KEY = os.environ.get('SECRET_KEY', 'dev-secret-key-change-in-production')
    
    # OKX配置（公共接口不需要API密钥）
    OKX_API_KEY = os.environ.get('OKX_API_KEY', '')
    OKX_SECRET_KEY = os.environ.get('OKX_SECRET_KEY', '')
    OKX_PASSPHRASE = os.environ.get('OKX_PASSPHRASE', '')
    
    # RSS配置
    RSS_TITLE = "Crypto RSS Service"
    RSS_DESCRIPTION = "Real-time cryptocurrency prices and more"
    RSS_LANGUAGE = "zh-cn"
    RSS_LINK = "http://localhost:5000"
    
    # 缓存配置
    CACHE_TIMEOUT = timedelta(seconds=30)  # 30秒缓存，适合低频率刷新
    
    # 服务配置
    DEFAULT_CRYPTO_PAIR = "ETH-USDT"
    
    @staticmethod
    def init_app(app):
        pass

class DevelopmentConfig(Config):
    DEBUG = True

class ProductionConfig(Config):
    DEBUG = False

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