<?php

declare(strict_types=1);

use App\Domain\Cms\ValueObjects\Locale;

describe('Locale', function () {
    it('can be created from valid locale string', function () {
        $locale = Locale::fromString('en');

        expect($locale->toString())->toBe('en');
        expect((string) $locale)->toBe('en');
    });

    it('accepts locale with region', function () {
        $locale = Locale::fromString('en-US');

        expect($locale->toString())->toBe('en-US');
        expect($locale->getLanguage())->toBe('en');
        expect($locale->getRegion())->toBe('US');
    });

    it('has factory methods for common locales', function () {
        expect(Locale::english()->toString())->toBe('en');
        expect(Locale::german()->toString())->toBe('de');
        expect(Locale::french()->toString())->toBe('fr');
        expect(Locale::spanish()->toString())->toBe('es');
    });

    it('extracts language from locale', function () {
        expect(Locale::fromString('en')->getLanguage())->toBe('en');
        expect(Locale::fromString('en-US')->getLanguage())->toBe('en');
        expect(Locale::fromString('de-CH')->getLanguage())->toBe('de');
    });

    it('extracts region from locale with region', function () {
        expect(Locale::fromString('en-US')->getRegion())->toBe('US');
        expect(Locale::fromString('de-CH')->getRegion())->toBe('CH');
    });

    it('returns null for region when locale has no region', function () {
        expect(Locale::fromString('en')->getRegion())->toBeNull();
        expect(Locale::fromString('de')->getRegion())->toBeNull();
    });

    it('throws exception for invalid locale format', function () {
        expect(fn () => Locale::fromString('invalid'))
            ->toThrow(InvalidArgumentException::class, 'Invalid locale format');

        expect(fn () => Locale::fromString('EN'))
            ->toThrow(InvalidArgumentException::class);

        expect(fn () => Locale::fromString('en-us'))
            ->toThrow(InvalidArgumentException::class);
    });

    it('can compare two Locales for equality', function () {
        $locale1 = Locale::fromString('en');
        $locale2 = Locale::fromString('en');
        $locale3 = Locale::fromString('de');

        expect($locale1->equals($locale2))->toBeTrue();
        expect($locale1->equals($locale3))->toBeFalse();

        $locale4 = Locale::fromString('en-US');
        expect($locale1->equals($locale4))->toBeFalse();
    });
});