"""
应用配置
"""
import os
from pydantic_settings import BaseSettings
from functools import lru_cache


class Settings(BaseSettings):
    """应用配置"""
    
    # 应用配置
    APP_NAME: str = "小虾 SaaS"
    APP_VERSION: str = "1.0.0"
    BASE_URL: str = "http://localhost:3000"
    
    # 数据库配置
    DATABASE_URL: str = "postgresql://xiaoxia:password@localhost:5432/xiaoxia_saas"
    USE_IN_MEMORY_DB: bool = False  # True = 使用内存数据库，False = 使用 PostgreSQL
    
    # Redis 配置
    REDIS_URL: str = "redis://localhost:6379/0"
    
    # JWT 配置
    JWT_SECRET_KEY: str = "your-secret-key-change-in-production"
    JWT_ALGORITHM: str = "HS256"
    JWT_ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
    JWT_REFRESH_TOKEN_EXPIRE_DAYS: int = 30
    
    # 邮件配置
    SMTP_HOST: str = "smtp.gmail.com"
    SMTP_PORT: int = 587
    SMTP_USER: str = ""
    SMTP_PASSWORD: str = ""
    SMTP_FROM_EMAIL: str = ""
    SMTP_FROM_NAME: str = "小虾 SaaS"
    
    # 环境
    ENVIRONMENT: str = "development"  # development, staging, production
    DEBUG: bool = True
    
    # CORS
    CORS_ORIGINS: list = ["http://localhost:3000", "http://localhost:5173"]
    
    class Config:
        env_file = ".env"
        case_sensitive = True


@lru_cache()
def get_settings() -> Settings:
    """获取配置（单例）"""
    return Settings()


# 全局配置实例
settings = get_settings()