<?php

namespace Tests\App\Services;

use App\Services\SchoolYearManagementService;
use CodeIgniter\Test\CIUnitTestCase;
use ReflectionClass;

final class SchoolYearManagementServiceCalendarTest extends CIUnitTestCase
{
    public function testCalendarDefaultsForNextSchoolYear(): void
    {
        $calendar = $this->calendarPayload('2026-2027');

        $this->assertSame('2026-08-01', $calendar['starts_on']);
        $this->assertSame('2027-07-31', $calendar['ends_on']);
        $this->assertSame('2026-08-01', $calendar['registration_starts_on']);
        $this->assertSame('2026-10-05', $calendar['registration_ends_on']);
        $this->assertSame('2026-09-20', $calendar['first_day_of_school']);
        $this->assertSame('2026-09-13', $calendar['fall_makeup_exam_on']);
        $this->assertSame('2026-09-06', $calendar['orientation_day']);
        $this->assertSame('2027-05-23', $calendar['final_exam_day']);
        $this->assertSame('2027-06-06', $calendar['last_day_of_school']);
        $this->assertSame('2027-01-17', $calendar['midterm_exam_day']);
        $this->assertSame('2027-01-24', $calendar['spring_semester_start']);
        $this->assertSame('2027-03-01', $calendar['installment_date']);
    }

    public function testNextToLastSeptemberSundayWhenMonthEndsOnSunday(): void
    {
        $calendar = $this->calendarPayload('2029-2030');

        $this->assertSame('2029-09-23', $calendar['first_day_of_school']);
    }

    private function calendarPayload(string $schoolYear): array
    {
        $service = (new ReflectionClass(SchoolYearManagementService::class))->newInstanceWithoutConstructor();
        $method = (new ReflectionClass(SchoolYearManagementService::class))->getMethod('calendarPayloadForSchoolYear');
        $method->setAccessible(true);

        return $method->invoke($service, $schoolYear);
    }
}