"""
应用配置模块
使用 pydantic-settings 管理环境变量配置
"""
from pydantic_settings import BaseSettings
from typing import Optional


class Settings(BaseSettings):
    """应用配置类"""
    
    # API 配置
    app_name: str = "AI FastAPI Demo"
    app_version: str = "1.0.0"
    debug: bool = True
    
    # OpenAI 配置
    openai_api_key: str = "your_openai_api_key_here"  # 请在 .env 文件中设置
    openai_base_url: Optional[str] = None
    openai_model: str = "gpt-3.5-turbo"
    
    # 服务器配置
    host: str = "0.0.0.0"
    port: int = 8000
    
    class Config:
        env_file = ".env"
        env_file_encoding = "utf-8"


# 创建全局配置实例
settings = Settings()