from __future__ import annotations

import os
from dataclasses import dataclass
from pathlib import Path


@dataclass(frozen=True, slots=True)
class Settings:
    telegram_token: str
    base_app_url: str
    data_dir: Path

    @property
    def database_path(self) -> Path:
        return self.data_dir / "pozhitki.sqlite3"

    @property
    def avatars_dir(self) -> Path:
        return self.data_dir / "avatars"

    @property
    def webapp_url(self) -> str:
        return f"{self.base_app_url.rstrip('/')}/app/"


def load_settings() -> Settings:
    return Settings(
        telegram_token=os.getenv("TELEGRAM_TOKEN", "").strip(),
        base_app_url=os.getenv("BASE_APP_URL", "http://localhost").strip(),
        data_dir=Path(os.getenv("DATA_DIR", "/data")),
    )