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


class Settings(BaseSettings):
    """应用设置"""
    # 应用
    APP_NAME: str = "秒思智能审核平台"
    APP_VERSION: str = "1.0.0"
    DEBUG: bool = False

    # 数据库
    DATABASE_URL: str = "postgresql+asyncpg://postgres:postgres@localhost:5432/miaosi"

    # Redis
    REDIS_URL: str = "redis://localhost:6379/0"

    # JWT
    SECRET_KEY: str = "your-secret-key-change-in-production"
    ALGORITHM: str = "HS256"
    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30

    # AI 服务（使用 OneAPI/OneInAll 等中转服务商，不直连厂商）
    # 中转服务商统一了不同 AI 厂商的接口，只需配置中转商的 API
    AI_PROVIDER: str = "oneapi"  # oneapi | oneinall | openrouter 等中转服务商
    AI_API_KEY: str = ""  # 中转服务商的 API Key
    AI_API_BASE_URL: str = ""  # 中转服务商的 Base URL，如 https://api.oneinall.ai/v1

    # 阿里云 OSS 配置
    OSS_ACCESS_KEY_ID: str = ""
    OSS_ACCESS_KEY_SECRET: str = ""
    OSS_ENDPOINT: str = "oss-cn-hangzhou.aliyuncs.com"
    OSS_BUCKET_NAME: str = "miaosi-files"
    OSS_BUCKET_DOMAIN: str = ""  # 公开访问域名，如 https://miaosi-files.oss-cn-hangzhou.aliyuncs.com

    # 加密密钥
    ENCRYPTION_KEY: str = ""

    # 文件上传限制
    MAX_FILE_SIZE_MB: int = 500  # 最大文件大小 500MB

    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        if self.SECRET_KEY == "your-secret-key-change-in-production":
            warnings.warn(
                "SECRET_KEY 使用默认值，请在 .env 中设置安全的密钥！",
                UserWarning,
                stacklevel=2,
            )
        if not self.ENCRYPTION_KEY:
            warnings.warn(
                "ENCRYPTION_KEY 未设置，API 密钥将无法安全存储！",
                UserWarning,
                stacklevel=2,
            )

    class Config:
        env_file = ".env"
        case_sensitive = True


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


settings = get_settings()