<?php

namespace Tests\Unit\Schedule;

use App\Schedule\ScheduleAssignment;
use DateTimeImmutable;
use DateTimeZone;
use PHPUnit\Framework\TestCase;

class ScheduleAssignmentTest extends TestCase
{
    public function test_it_completes_only_once_until_reopened(): void
    {
        $assignment = $this->assignment();
        $firstCompletion = $this->utc('2026-08-15T12:00:00');
        $laterCompletion = $this->utc('2026-08-15T13:00:00');

        $assignment->complete($firstCompletion);
        $assignment->complete($laterCompletion);

        $this->assertSame($firstCompletion, $assignment->getCompletedAt());

        $assignment->reopen();

        $this->assertNull($assignment->getCompletedAt());

        $assignment->complete($laterCompletion);

        $this->assertSame($laterCompletion, $assignment->getCompletedAt());
    }

    private function assignment(): ScheduleAssignment
    {
        return new ScheduleAssignment(
            id: 1,
            name: 'Lesson',
            kind: 'lesson',
            path: ['Course', 'Lesson'],
            scheduledDate: $this->utc('2026-08-15'),
            position: 1,
            completedAt: null,
        );
    }

    private function utc(string $value): DateTimeImmutable
    {
        return new DateTimeImmutable($value, new DateTimeZone('UTC'));
    }
}