<?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 {
    it('creates a valid coupon availability calendar with one period', function (): void {
        // GIVEN
        $periods = [
            new Period(new DateTime('2026-01-01'), new DateTime('2026-02-01')),
        ];

        // WHEN
        $couponAvailabilityCalendar = new CouponAvailabilityCalendar($periods);

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

    it('creates a valid coupon availability calendar with several periods', function (): void {
        // GIVEN
        $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')),
        ];

        // WHEN
        $couponAvailabilityCalendar = new CouponAvailabilityCalendar($periods);

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

    it('rejects a coupon availability calendar without period', function (): void {
        // GIVEN
        $periods = [];

        // GIVEN / THEN
        expect(fn (): CouponAvailabilityCalendar => new CouponAvailabilityCalendar($periods))->toThrow(\DomainException::class);
    });

    it('rejects a coupon availability calendar with a non-period element', function (): void {
        // GIVEN
        $periods = ['2026-08-25', '2026-10-31'];

        // WHEN / THEN
        expect(fn (): CouponAvailabilityCalendar => new CouponAvailabilityCalendar($periods))
            ->toThrow(\DomainException::class, 'CouponAvailabilityCalendar periods must be Period instances.');
    });
});