<?php

declare(strict_types=1);

namespace Tests\Unit\Shared\Pagination;

use InvalidArgumentException;
use Shared\Pagination\PageNumber;

covers(PageNumber::class);

describe('PageNumber Value Object Unit Tests', function (): void {
    it('creates a valid page number with default value', function (): void {
        // GIVEN / WHEN
        $page = new PageNumber();

        // THEN
        expect($page->value)->toBe(1)
            ->and($page->value())->toBe(1)
            ->and((string) $page)->toBe('1')
            ->and(json_encode($page))->toBe('1');
    });

    it('creates a valid page number with specific value', function (): void {
        // GIVEN
        $value = 5;

        // WHEN
        $page = new PageNumber($value);

        // THEN
        expect($page->value)->toBe(5)
            ->and($page->value())->toBe(5)
            ->and((string) $page)->toBe('5');
    });

    it('creates a page number using of() factory', function (): void {
        // GIVEN
        $value = 10;

        // WHEN
        $page = PageNumber::of($value);

        // THEN
        expect($page->value)->toBe(10);
    });

    it('creates a page number using default() factory', function (): void {
        // GIVEN / WHEN
        $page = PageNumber::default();

        // THEN
        expect($page->value)->toBe(1);
    });

    it('rejects invalid page numbers', function (int $invalid): void {
        // GIVEN / WHEN
        expect(fn () => new PageNumber($invalid))
            // THEN
            ->toThrow(InvalidArgumentException::class, 'Page number must be greater than 0');
    })->with([0, -1, -5, -100]);

    it('correctly checks equality with another instance', function (): void {
        // GIVEN
        $page1 = new PageNumber(2);
        $page2 = new PageNumber(2);
        $page3 = new PageNumber(3);

        // THEN
        expect($page1->equals($page2))->toBeTrue()
            ->and($page1->equals($page3))->toBeFalse()
            ->and($page1->equals(2))->toBeFalse()
            ->and($page1->equals(null))->toBeFalse()
            ->and($page1->equals('2'))->toBeFalse();
    });
});