"""Тесты разбора переменных окружения (без БД и сети).

Проверяем граничные случаи, которые уже ломали запуск:
- ``ADMIN_IDS`` пустой / через запятую / как JSON-массив;
- пустые целочисленные поля ``CHAT_ID``/``ALERT_CHAT_ID``;
- обязательный ``BOT_TOKEN``.
"""

from __future__ import annotations

import pytest
from pydantic import ValidationError

from common.config import Settings

#: Переменные, которые чистим перед каждым тестом, чтобы окружение не влияло.
_ENV_KEYS = ("BOT_TOKEN", "APP_ENV", "ADMIN_IDS", "CHAT_ID", "ALERT_CHAT_ID")


@pytest.fixture(autouse=True)
def _clean_env(monkeypatch: pytest.MonkeyPatch) -> None:
    for key in _ENV_KEYS:
        monkeypatch.delenv(key, raising=False)


def _settings(monkeypatch: pytest.MonkeyPatch, **env: str) -> Settings:
    for key, value in env.items():
        monkeypatch.setenv(key, value)
    return Settings(_env_file=None)


def test_admin_ids_empty(monkeypatch: pytest.MonkeyPatch) -> None:
    assert _settings(monkeypatch, BOT_TOKEN="1:a", ADMIN_IDS="").admin_ids == []


def test_admin_ids_not_set(monkeypatch: pytest.MonkeyPatch) -> None:
    assert _settings(monkeypatch, BOT_TOKEN="1:a").admin_ids == []


def test_admin_ids_comma(monkeypatch: pytest.MonkeyPatch) -> None:
    assert _settings(monkeypatch, BOT_TOKEN="1:a", ADMIN_IDS="1,2, 3").admin_ids == [1, 2, 3]


def test_admin_ids_json_like(monkeypatch: pytest.MonkeyPatch) -> None:
    assert _settings(monkeypatch, BOT_TOKEN="1:a", ADMIN_IDS="[7, 8]").admin_ids == [7, 8]


def test_chat_ids_empty_are_zero(monkeypatch: pytest.MonkeyPatch) -> None:
    settings = _settings(monkeypatch, BOT_TOKEN="1:a", CHAT_ID="", ALERT_CHAT_ID="")
    assert settings.chat_id == 0
    assert settings.alert_chat_id == 0


def test_chat_id_value(monkeypatch: pytest.MonkeyPatch) -> None:
    assert _settings(monkeypatch, BOT_TOKEN="1:a", CHAT_ID="-1001234567890").chat_id == -1001234567890


def test_bot_token_required(monkeypatch: pytest.MonkeyPatch) -> None:
    with pytest.raises(ValidationError):
        Settings(_env_file=None)