from functools import lru_cache

from pydantic import Field
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(
        env_file=".env",
        env_file_encoding="utf-8",
        extra="ignore",
    )

    app_name: str = "aiclient-api"
    debug: bool = False

    mysql_host: str = "127.0.0.1"
    mysql_port: int = 3306
    mysql_user: str = "root"
    mysql_password: str = ""
    mysql_database: str = "aiclient"

    redis_url: str = "redis://127.0.0.1:6379/0"

    secret_key: str = Field(default="change-me-in-production")
    access_token_expire_minutes: int = 60 * 24 * 7

    """AES-256 密钥：32 字节 Base64 或 64 位十六进制；为空则关闭 API 加解密。"""
    api_aes_key: str = "98cde5e64ee0da6ed0c5842f43a950aa0d8ae5087c43c8d8ee5d10bd8d571bb4"

    cors_origins: str = "http://localhost:1420"

    """对外图片/品牌资源基址，用于拼接 logo_url。"""
    api_public_base: str = "http://127.0.0.1:8001"

    @property
    def database_url(self) -> str:
        return (
            f"mysql+aiomysql://{self.mysql_user}:{self.mysql_password}"
            f"@{self.mysql_host}:{self.mysql_port}/{self.mysql_database}"
        )

    @property
    def cors_origin_list(self) -> list[str]:
        raw = self.cors_origins.strip()
        if raw == "*":
            return ["*"]
        return [o.strip() for o in raw.split(",") if o.strip()]


@lru_cache
def get_settings() -> Settings:
    return Settings()