<?php

declare(strict_types=1);

namespace Akeneo\Tool\Bundle\MeasureBundle\Model;

/**
 * @author    Samir Boulil <samir.boulil@akeneo.com>
 * @copyright 2020 Akeneo SAS (http://www.akeneo.com)
 */
class LabelCollection
{
    private array $translatedLabels;

    private function __construct(array $translatedLabels)
    {
        foreach ($translatedLabels as $code => $label) {
            if ('' === $label) {
                unset($translatedLabels[$code]);
                continue;
            }

            if (!is_string($code)) {
                throw new \InvalidArgumentException(sprintf('Expecting locale code to be a string, %s given.', $code));
            }

            if ('' === $code) {
                throw new \InvalidArgumentException('Locale code cannot be empty.');
            }

            if (!is_string($label)) {
                throw new \InvalidArgumentException(sprintf('Expecting label to be a string, %s given.', $label));
            }
        }

        $this->translatedLabels = $translatedLabels;
    }

    public static function fromArray(array $translatedLabels): self
    {
        return new self($translatedLabels);
    }

    public function getLabel(string $localeCode): ?string
    {
        return $this->translatedLabels[$localeCode] ?? null;
    }

    public function hasLabel(string $localeCode): bool
    {
        return array_key_exists($localeCode, $this->translatedLabels);
    }

    public function getLocaleCodes(): array
    {
        return array_keys($this->translatedLabels);
    }

    public function normalize(): array
    {
        return $this->translatedLabels;
    }

    public function filterByLocaleIdentifiers(array $localeIdentifiers): LabelCollection
    {
        $localeCodes = array_map(static fn (LocaleIdentifier $localeIdentifier) => $localeIdentifier->normalize(), $localeIdentifiers);

        $filteredLabels = array_filter($this->translatedLabels, static fn (string $labelCode) => in_array($labelCode, $localeCodes), ARRAY_FILTER_USE_KEY);

        return new self($filteredLabels);
    }
}