<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Translation\Command;

use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Style\SymfonyStyle;
use Symfony\Component\Translation\Catalogue\TargetOperation;
use Symfony\Component\Translation\MessageCatalogue;
use Symfony\Component\Translation\Provider\TranslationProviderCollection;
use Symfony\Component\Translation\Reader\TranslationReaderInterface;
use Symfony\Component\Translation\Writer\TranslationWriterInterface;

/**
 * @author Mathieu Santostefano <msantostefano@protonmail.com>
 *
 * @experimental in 5.3
 */
final class TranslationPullCommand extends Command
{
    use TranslationTrait;

    protected static $defaultName = 'translation:pull';
    protected static $defaultDescription = 'Pull translations from a given provider.';

    private $providerCollection;
    private $writer;
    private $reader;
    private $defaultLocale;
    private $transPaths;
    private $enabledLocales;

    public function __construct(TranslationProviderCollection $providerCollection, TranslationWriterInterface $writer, TranslationReaderInterface $reader, string $defaultLocale, array $transPaths = [], array $enabledLocales = [])
    {
        $this->providerCollection = $providerCollection;
        $this->writer = $writer;
        $this->reader = $reader;
        $this->defaultLocale = $defaultLocale;
        $this->transPaths = $transPaths;
        $this->enabledLocales = $enabledLocales;

        parent::__construct();
    }

    /**
     * {@inheritdoc}
     */
    protected function configure()
    {
        $keys = $this->providerCollection->keys();
        $defaultProvider = 1 === \count($keys) ? $keys[0] : null;

        $this
            ->setDefinition([
                new InputArgument('provider', null !== $defaultProvider ? InputArgument::OPTIONAL : InputArgument::REQUIRED, 'The provider to pull translations from.', $defaultProvider),
                new InputOption('force', null, InputOption::VALUE_NONE, 'Override existing translations with provider ones (it will delete not synchronized messages).'),
                new InputOption('intl-icu', null, InputOption::VALUE_NONE, 'Associated to --force option, it will write messages in "%domain%+intl-icu.%locale%.xlf" files.'),
                new InputOption('domains', null, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY, 'Specify the domains to pull.'),
                new InputOption('locales', null, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY, 'Specify the locales to pull.'),
                new InputOption('format', null, InputOption::VALUE_OPTIONAL, 'Override the default output format.', 'xlf12'),
            ])
            ->setHelp(<<<'EOF'
The <info>%command.name%</> command pulls translations from the given provider. Only
new translations are pulled, existing ones are not overwritten.

You can overwrite existing translations (and remove the missing ones on local side) by using the <comment>--force</> flag:

  <info>php %command.full_name% --force provider</>

Full example:

  <info>php %command.full_name% provider --force --domains=messages,validators --locales=en</>

This command pulls all translations associated with the <comment>messages</> and <comment>validators</> domains for the <comment>en</> locale.
Local translations for the specified domains and locale are deleted if they're not present on the provider and overwritten if it's the case.
Local translations for others domains and locales are ignored.
EOF
            )
        ;
    }

    /**
     * {@inheritdoc}
     */
    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        $io = new SymfonyStyle($input, $output);

        $provider = $this->providerCollection->get($input->getArgument('provider'));
        $force = $input->getOption('force');
        $intlIcu = $input->getOption('intl-icu');
        $locales = $input->getOption('locales') ?: $this->enabledLocales;
        $domains = $input->getOption('domains');
        $format = $input->getOption('format');
        $xliffVersion = '1.2';

        if ($intlIcu && !$force) {
            $io->note('--intl-icu option only has an effect when used with --force. Here, it will be ignored.');
        }

        switch ($format) {
            case 'xlf20': $xliffVersion = '2.0';
            // no break
            case 'xlf12': $format = 'xlf';
        }

        $writeOptions = [
            'path' => end($this->transPaths),
            'xliff_version' => $xliffVersion,
        ];

        if (!$domains) {
            $domains = $provider->getDomains();
        }

        $providerTranslations = $provider->read($domains, $locales);

        if ($force) {
            foreach ($providerTranslations->getCatalogues() as $catalogue) {
                $operation = new TargetOperation((new MessageCatalogue($catalogue->getLocale())), $catalogue);
                if ($intlIcu) {
                    $operation->moveMessagesToIntlDomainsIfPossible();
                }
                $this->writer->write($operation->getResult(), $format, $writeOptions);
            }

            $io->success(sprintf('Local translations has been updated from "%s" (for "%s" locale(s), and "%s" domain(s)).', parse_url($provider, \PHP_URL_SCHEME), implode(', ', $locales), implode(', ', $domains)));

            return 0;
        }

        $localTranslations = $this->readLocalTranslations($locales, $domains, $this->transPaths);

        // Append pulled translations to local ones.
        $localTranslations->addBag($providerTranslations->diff($localTranslations));

        foreach ($localTranslations->getCatalogues() as $catalogue) {
            $this->writer->write($catalogue, $format, $writeOptions);
        }

        $io->success(sprintf('New translations from "%s" has been written locally (for "%s" locale(s), and "%s" domain(s)).', parse_url($provider, \PHP_URL_SCHEME), implode(', ', $locales), implode(', ', $domains)));

        return 0;
    }
}