"""Unit tests for Spotify chart date probing logic."""
from datetime import date

import pytest

from src import spotify


@pytest.fixture()
def mock_token(mocker):
    mocker.patch('src.spotify._get_oauth_token', return_value='tok')


@pytest.fixture()
def mock_probe(mocker):
    return mocker.patch('src.spotify._probe')


@pytest.fixture()
def mock_today(mocker):
    mock = mocker.patch('src.spotify.date')
    mock.today.return_value = date(2026, 6, 30)
    return mock


def test_returns_today_when_200(mock_token, mock_probe, mock_today):
    mock_probe.return_value = 200
    assert spotify.get_latest_chart_date() == '2026-06-30'


def test_falls_back_to_yesterday_on_404(mock_token, mock_probe, mock_today):
    mock_probe.side_effect = [404, 200]
    assert spotify.get_latest_chart_date() == '2026-06-29'


def test_returns_none_on_network_error(mock_token, mock_probe, mock_today):
    mock_probe.return_value = None
    assert spotify.get_latest_chart_date() is None


def test_returns_none_on_unexpected_status(mock_token, mock_probe, mock_today):
    """401/429/5xx must not be silently treated as 'no chart yet'."""
    for bad_status in (401, 429, 500, 503):
        mock_probe.return_value = bad_status
        result = spotify.get_latest_chart_date()
        assert result is None, f'Expected None for status {bad_status}'


def test_returns_none_when_no_date_found_in_window(mock_token, mock_probe, mock_today):
    mock_probe.return_value = 404
    assert spotify.get_latest_chart_date() is None