<?php

declare(strict_types=1);

namespace Tests\Unit\Domain\Models\ValueObjects\Coupon;

use Domain\Models\ValueObjects\Coupon\CouponAvailabilityCalendar;
use Domain\Models\ValueObjects\Period;
use DateTime;

covers(CouponAvailabilityCalendar::class);

describe('coupon availability calendar', function (): void {
    $singlePeriods  = [
        new Period(new DateTime('2026-01-01'), new DateTime('2026-02-01')),
    ];
    $periods        = [
        new Period(new DateTime('2026-01-01'), new DateTime('2026-02-01')),
        new Period(new DateTime('2026-03-01'), new DateTime('2026-04-01')),
    ];
    $invalidPeriods = ['2026-08-25', '2026-10-31'];
    $emptyPeriods   = [];

    it('creates a valid coupon availability calendar with one period', function () use ($singlePeriods): void {
        // GIVEN / WHEN
        $couponAvailabilityCalendar = new CouponAvailabilityCalendar($singlePeriods);

        // THEN
        expect($couponAvailabilityCalendar->periods)->toBe($singlePeriods);
    });

    it('creates a valid coupon availability calendar with several periods', function () use ($periods): void {
        // GIVEN / WHEN
        $couponAvailabilityCalendar = new CouponAvailabilityCalendar($periods);

        // THEN
        expect($couponAvailabilityCalendar->periods)->toBe($periods);
    });

    it('rejects a coupon availability calendar without period', function () use ($emptyPeriods): void {
        // GIVEN / WHEN / THEN
        expect(fn (): CouponAvailabilityCalendar => new CouponAvailabilityCalendar($emptyPeriods))
            ->toThrow(\DomainException::class);
    });

    it('rejects a coupon availability calendar with a non-period element', function () use ($invalidPeriods): void {
        // GIVEN / WHEN / THEN
        expect(fn (): CouponAvailabilityCalendar => new CouponAvailabilityCalendar($invalidPeriods))
            ->toThrow(\DomainException::class, 'CouponAvailabilityCalendar periods must be Period instances.');
    });
});