<?php

use App\Models\BackupSchedule;
use App\Services\BackupScheduling\ScheduleTimeService;
use Carbon\CarbonImmutable;

it('skips nonexistent DST local time slots for daily schedules', function () {
    $schedule = new BackupSchedule;
    $schedule->forceFill([
        'frequency' => 'daily',
        'timezone' => 'Europe/Berlin',
        'time_of_day' => '02:30:00',
        'days_of_week' => [],
    ]);

    $service = app(ScheduleTimeService::class);

    // On 2026-03-29 in Europe/Berlin, the clock jumps from 02:00 to 03:00 (02:30 is nonexistent).
    // Using an "after" cursor later than 02:30 on the previous day forces the candidate day to be 2026-03-29.
    $after = CarbonImmutable::create(2026, 3, 28, 3, 0, 0, 'Europe/Berlin');

    $next = $service->nextRunFor($schedule, $after);

    expect($next)->not->toBeNull();
    expect($next->timezone('UTC')->format('Y-m-d H:i:s'))->toBe('2026-03-30 00:30:00');
});

it('returns null for weekly schedules without allowed days', function () {
    $schedule = new BackupSchedule;
    $schedule->forceFill([
        'frequency' => 'weekly',
        'timezone' => 'UTC',
        'time_of_day' => '10:00:00',
        'days_of_week' => [],
    ]);

    $service = app(ScheduleTimeService::class);

    $next = $service->nextRunFor($schedule, CarbonImmutable::create(2026, 1, 5, 0, 0, 0, 'UTC'));

    expect($next)->toBeNull();
});
