import os
from typing import Optional
from pydantic_settings import BaseSettings


class Settings(BaseSettings):
    """应用配置类"""

    # DeepSeek API配置
    deepseek_api_key: str = "your-deepseek-api-key"

    # 服务器配置
    host: str = "0.0.0.0"
    port: int = 8000

    # 其他配置
    debug: bool = False

    # CORS配置
    cors_origins: list = [
        "http://chat.nexjs.com",
        "http://localhost:3000",
        "http://localhost:5173",
        "http://localhost:5174",
    ]

    class Config:
        env_file = ".env"
        env_file_encoding = "utf-8"


# 全局配置实例
settings = Settings()


def get_deepseek_api_key() -> str:
    """获取DeepSeek API密钥"""
    api_key = settings.deepseek_api_key

    if api_key == "your-deepseek-api-key":
        # 尝试从环境变量获取
        api_key = os.getenv("DEEPSEEK_API_KEY", "your-deepseek-api-key")

    return api_key


def is_api_key_configured() -> bool:
    """检查API密钥是否已配置"""
    api_key = get_deepseek_api_key()
    return api_key != "your-deepseek-api-key"