"""
应用配置模块
从环境变量加载配置项
"""
from pydantic_settings import BaseSettings
from typing import Optional


class Settings(BaseSettings):
    """应用配置类"""
    
    # MongoDB配置
    MONGODB_URL: str = "mongodb://localhost:27017"
    MONGODB_DB: str = "ai_chatroom"
    
    # 服务配置
    HOST: str = "0.0.0.0"
    PORT: int = 8000
    DEBUG: bool = True
    
    # 安全配置
    SECRET_KEY: str = "your-secret-key-change-in-production"
    ENCRYPTION_KEY: str = "your-encryption-key-32-bytes-long"
    
    # CORS配置
    CORS_ORIGINS: list = ["http://localhost:3000", "http://127.0.0.1:3000"]
    
    # WebSocket配置
    WS_HEARTBEAT_INTERVAL: int = 30
    
    # 默认AI配置
    DEFAULT_TIMEOUT: int = 60
    DEFAULT_MAX_TOKENS: int = 2000
    DEFAULT_TEMPERATURE: float = 0.7
    
    # 代理配置（全局默认）
    DEFAULT_HTTP_PROXY: Optional[str] = None
    DEFAULT_HTTPS_PROXY: Optional[str] = None
    
    # 速率限制
    RATE_LIMIT_REQUESTS: int = 100
    RATE_LIMIT_PERIOD: int = 60  # 秒
    
    class Config:
        env_file = ".env"
        env_file_encoding = "utf-8"


# 全局配置实例
settings = Settings()