from functools import lru_cache
from typing import Optional

from pydantic import Field
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    db_url: str = Field(
        "mysql+asyncmy://root:password@localhost:3306/aws_ec2_panel?charset=utf8mb4",
        description="SQLAlchemy database URL",
    )
    jwt_secret: str = Field("change-me", description="Secret used to sign JWT tokens")
    jwt_expire_minutes: int = Field(60, description="JWT expiration in minutes")
    jwt_algorithm: str = Field("HS256", description="JWT signing algorithm")
    aws_proxy_url: Optional[str] = Field(default=None, description="Optional proxy URL for AWS SDK")
    aws_timeout: int = Field(30, description="Timeout seconds for AWS API calls")

    model_config = SettingsConfigDict(env_file=".env", env_prefix="", extra="ignore")


@lru_cache(maxsize=1)
def get_settings() -> Settings:
    return Settings()


settings = get_settings()