from __future__ import annotations

from dataclasses import dataclass
import os


@dataclass(frozen=True)
class Settings:
    state_file: str
    docker_api_url: str
    docker_timeout_seconds: float
    app_port: int


def get_settings() -> Settings:
    return Settings(
        state_file=os.getenv("STATE_FILE", "/data/entries.json"),
        docker_api_url=os.getenv("DOCKER_API_URL", "unix:///var/run/docker.sock"),
        docker_timeout_seconds=float(os.getenv("DOCKER_TIMEOUT_SECONDS", "3")),
        app_port=int(os.getenv("APP_PORT", "31810")),
    )