from functools import lru_cache
from typing import List

from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(env_file=".env", env_ignore_empty=True)

    PROJECT_NAME: str = "NautilusDesk API"
    SECRET_KEY: str = "change-me"
    ACCESS_TOKEN_EXPIRE_MINUTES: int = 60

    POSTGRES_SERVER: str = "localhost"
    POSTGRES_PORT: int = 5432
    POSTGRES_USER: str = "postgres"
    POSTGRES_PASSWORD: str = "postgres"
    POSTGRES_DB: str = "nautilusdesk"
    DATABASE_URL: str | None = None

    BACKEND_CORS_ORIGINS: List[str] = []

    @property
    def database_url(self) -> str:
        if self.DATABASE_URL:
            return self.DATABASE_URL
        return (
            f"postgresql+psycopg2://{self.POSTGRES_USER}:"
            f"{self.POSTGRES_PASSWORD}@{self.POSTGRES_SERVER}:"
            f"{self.POSTGRES_PORT}/{self.POSTGRES_DB}"
        )


@lru_cache

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