from pathlib import Path
from pydantic_settings import BaseSettings
from typing import Optional


class Settings(BaseSettings):
    # Application settings
    PROJECT_NAME: str = "Task Management API"
    PROJECT_DESCRIPTION: str = "A simple task management API using FastAPI and SQLite"
    VERSION: str = "0.1.0"
    API_PREFIX: str = "/api"

    # Database settings
    DB_DIR: Path = Path("/app") / "storage" / "db"
    SQLALCHEMY_DATABASE_URL: Optional[str] = None

    class Config:
        env_file = ".env"
        env_file_encoding = "utf-8"
        case_sensitive = True

    def __init__(self, **kwargs):
        super().__init__(**kwargs)

        # Ensure database directory exists
        self.DB_DIR.mkdir(parents=True, exist_ok=True)

        # Set database URL if not provided
        if not self.SQLALCHEMY_DATABASE_URL:
            self.SQLALCHEMY_DATABASE_URL = f"sqlite:///{self.DB_DIR}/db.sqlite"


settings = Settings()