from pydantic_settings import BaseSettings
from functools import lru_cache


class Settings(BaseSettings):
    app_name: str = "SuperDream"
    debug: bool = False
    host: str = "0.0.0.0"
    port: int = 18000

    # Database
    db_type: str = "mysql"
    db_host: str = "10.11.0.43"
    db_port: int = 3306
    db_user: str = "root"
    db_password: str = "for_develop_only"
    db_name: str = "superdream"

    # Storage
    data_dir: str = "./data"

    # JWT
    jwt_secret: str = "superdream-secret-change-me"
    jwt_algorithm: str = "HS256"
    jwt_access_expire_minutes: int = 30
    jwt_refresh_expire_days: int = 7

    # sub2api upstream
    sub2api_base_url: str = "http://127.0.0.1:8080"
    sub2api_admin_token: str = ""
    sub2api_request_timeout: float = 10.0

    # Fernet key (urlsafe base64, 44 chars). Generate with:
    #   python -c "from cryptography.fernet import Fernet; print(Fernet.generate_key().decode())"
    token_encryption_key: str = ""

    @property
    def database_url(self) -> str:
        return (
            f"mysql+aiomysql://{self.db_user}:{self.db_password}"
            f"@{self.db_host}:{self.db_port}/{self.db_name}"
        )

    @property
    def sub2api_api_prefix(self) -> str:
        return self.sub2api_base_url.rstrip("/") + "/api/v1"

    class Config:
        env_file = ".env"
        env_prefix = "SD_"


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


settings = get_settings()