<?php
namespace Oro\Bundle\TranslationBundle\Controller;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Templating\TemplateReferenceInterface;
use Symfony\Contracts\Translation\TranslatorInterface;
use Twig\Environment;

class Controller
{
    protected TranslatorInterface $translator;
    protected Environment $templating;
    protected array $options;

    /**
     * @var string|TemplateReferenceInterface
     */
    protected $template;

    /**
     * @param string|TemplateReferenceInterface $template a template name or a TemplateReferenceInterface instance
     * @throws \InvalidArgumentException
     */
    public function __construct(TranslatorInterface $translator, Environment $templating, $template, $options)
    {
        $this->translator = $translator;
        $this->templating = $templating;
        if (empty($template) || !($template instanceof TemplateReferenceInterface || is_string($template))) {
            throw new \InvalidArgumentException('Please provide valid twig template as third argument');
        }
        $this->template = $template;
        $this->options = $options;
    }

    /**
     * Action point for js translation resource
     *
     * @param Request $request
     * @param string $_locale
     * @return Response
     */
    public function indexAction(Request $request, $_locale)
    {
        $domains = isset($this->options['domains']) ? $this->options['domains'] : [];
        $debug = isset($this->options['debug']) ? (bool)$this->options['debug'] : false;

        $content = $this->renderJsTranslationContent($domains, $_locale, $debug);

        return new Response($content, 200, ['Content-Type' => $request->getMimeType('js')]);
    }

    /**
     * Combines JSON with js translation and renders js-resource
     *
     * @param array $domains
     * @param string $locale
     * @param bool $debug
     * @return string
     */
    public function renderJsTranslationContent(array $domains, $locale, $debug = false)
    {
        $domainsTranslations = $this->translator->getTranslations($domains, $locale);

        $result = [
            'locale'         => $locale,
            'defaultDomains' => $domains,
            'messages'       => [],
        ];
        if ($debug) {
            $result['debug'] = true;
        }

        foreach ($domainsTranslations as $domain => $translations) {
            $result['messages'] += array_combine(
                array_map(
                    function ($id) use ($domain) {
                        return sprintf('%s:%s', $domain, $id);
                    },
                    array_keys($translations)
                ),
                array_values($translations)
            );
        }

        return $this->templating->render($this->template, ['json' => $result]);
    }
}