<?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\Bundle\FrameworkBundle\Command;

use Symfony\Bundle\FrameworkBundle\Translation\TranslationLoader;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Style\SymfonyStyle;
use Symfony\Component\Translation\Catalogue\TargetOperation;
use Symfony\Component\Translation\Catalogue\MergeOperation;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Translation\Extractor\ExtractorInterface;
use Symfony\Component\Translation\MessageCatalogue;
use Symfony\Component\Translation\Writer\TranslationWriter;

/**
 * A command that parses templates to extract translation messages and adds them
 * into the translation files.
 *
 * @author Michel Salib <michelsalib@hotmail.com>
 *
 * @final since version 3.4
 */
class TranslationUpdateCommand extends Command
{
    private $writer;
    private $loader;
    private $extractor;
    private $defaultLocale;

    /**
     * @param TranslationWriter  $writer
     * @param TranslationLoader  $loader
     * @param ExtractorInterface $extractor
     * @param string             $defaultLocale
     */
    public function __construct(TranslationWriter $writer, TranslationLoader $loader, ExtractorInterface $extractor, $defaultLocale)
    {
        parent::__construct();

        $this->writer = $writer;
        $this->loader = $loader;
        $this->extractor = $extractor;
        $this->defaultLocale = $defaultLocale;
    }

    /**
     * {@inheritdoc}
     */
    protected function configure()
    {
        $this
            ->setName('translation:update')
            ->setDefinition(array(
                new InputArgument('locale', InputArgument::REQUIRED, 'The locale'),
                new InputArgument('bundle', InputArgument::OPTIONAL, 'The bundle name or directory where to load the messages, defaults to app/Resources folder'),
                new InputOption('prefix', null, InputOption::VALUE_OPTIONAL, 'Override the default prefix', '__'),
                new InputOption('output-format', null, InputOption::VALUE_OPTIONAL, 'Override the default output format', 'yml'),
                new InputOption('dump-messages', null, InputOption::VALUE_NONE, 'Should the messages be dumped in the console'),
                new InputOption('force', null, InputOption::VALUE_NONE, 'Should the update be done'),
                new InputOption('no-backup', null, InputOption::VALUE_NONE, 'Should backup be disabled'),
                new InputOption('clean', null, InputOption::VALUE_NONE, 'Should clean not found messages'),
                new InputOption('domain', null, InputOption::VALUE_OPTIONAL, 'Specify the domain to update'),
            ))
            ->setDescription('Updates the translation file')
            ->setHelp(<<<'EOF'
The <info>%command.name%</info> command extracts translation strings from templates
of a given bundle or the app folder. It can display them or merge the new ones into the translation files.

When new translation strings are found it can automatically add a prefix to the translation
message.

Example running against a Bundle (AcmeBundle)
  <info>php %command.full_name% --dump-messages en AcmeBundle</info>
  <info>php %command.full_name% --force --prefix="new_" fr AcmeBundle</info>

Example running against app messages (app/Resources folder)
  <info>php %command.full_name% --dump-messages en</info>
  <info>php %command.full_name% --force --prefix="new_" fr</info>
EOF
            )
        ;
    }

    /**
     * {@inheritdoc}
     */
    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $io = new SymfonyStyle($input, $output);
        $errorIo = $io->getErrorStyle();

        // check presence of force or dump-message
        if ($input->getOption('force') !== true && $input->getOption('dump-messages') !== true) {
            $errorIo->error('You must choose one of --force or --dump-messages');

            return 1;
        }

        // check format
        $supportedFormats = $this->writer->getFormats();
        if (!in_array($input->getOption('output-format'), $supportedFormats)) {
            $errorIo->error(array('Wrong output format', 'Supported formats are: '.implode(', ', $supportedFormats).'.'));

            return 1;
        }
        $kernel = $this->getApplication()->getKernel();

        // Define Root Path to App folder
        $transPaths = array($kernel->getRootDir().'/Resources/');
        $currentName = 'app folder';

        // Override with provided Bundle info
        if (null !== $input->getArgument('bundle')) {
            try {
                $foundBundle = $kernel->getBundle($input->getArgument('bundle'));
                $transPaths = array(
                    $foundBundle->getPath().'/Resources/',
                    sprintf('%s/Resources/%s/', $kernel->getRootDir(), $foundBundle->getName()),
                );
                $currentName = $foundBundle->getName();
            } catch (\InvalidArgumentException $e) {
                // such a bundle does not exist, so treat the argument as path
                $transPaths = array($input->getArgument('bundle').'/Resources/');
                $currentName = $transPaths[0];

                if (!is_dir($transPaths[0])) {
                    throw new \InvalidArgumentException(sprintf('<error>"%s" is neither an enabled bundle nor a directory.</error>', $transPaths[0]));
                }
            }
        }

        $errorIo->title('Translation Messages Extractor and Dumper');
        $errorIo->comment(sprintf('Generating "<info>%s</info>" translation files for "<info>%s</info>"', $input->getArgument('locale'), $currentName));

        // load any messages from templates
        $extractedCatalogue = new MessageCatalogue($input->getArgument('locale'));
        $errorIo->comment('Parsing templates...');
        $this->extractor->setPrefix($input->getOption('prefix'));
        foreach ($transPaths as $path) {
            $path .= 'views';
            if (is_dir($path)) {
                $this->extractor->extract($path, $extractedCatalogue);
            }
        }

        // load any existing messages from the translation files
        $currentCatalogue = new MessageCatalogue($input->getArgument('locale'));
        $errorIo->comment('Loading translation files...');
        foreach ($transPaths as $path) {
            $path .= 'translations';
            if (is_dir($path)) {
                $this->loader->loadMessages($path, $currentCatalogue);
            }
        }

        if (null !== $domain = $input->getOption('domain')) {
            $currentCatalogue = $this->filterCatalogue($currentCatalogue, $domain);
            $extractedCatalogue = $this->filterCatalogue($extractedCatalogue, $domain);
        }

        // process catalogues
        $operation = $input->getOption('clean')
            ? new TargetOperation($currentCatalogue, $extractedCatalogue)
            : new MergeOperation($currentCatalogue, $extractedCatalogue);

        // Exit if no messages found.
        if (!count($operation->getDomains())) {
            $errorIo->warning('No translation messages were found.');

            return;
        }

        $resultMessage = 'Translation files were successfully updated';

        // show compiled list of messages
        if (true === $input->getOption('dump-messages')) {
            $extractedMessagesCount = 0;
            $io->newLine();
            foreach ($operation->getDomains() as $domain) {
                $newKeys = array_keys($operation->getNewMessages($domain));
                $allKeys = array_keys($operation->getMessages($domain));

                $list = array_merge(
                    array_diff($allKeys, $newKeys),
                    array_map(function ($id) {
                        return sprintf('<fg=green>%s</>', $id);
                    }, $newKeys),
                    array_map(function ($id) {
                        return sprintf('<fg=red>%s</>', $id);
                    }, array_keys($operation->getObsoleteMessages($domain)))
                );

                $domainMessagesCount = count($list);

                $io->section(sprintf('Messages extracted for domain "<info>%s</info>" (%d message%s)', $domain, $domainMessagesCount, $domainMessagesCount > 1 ? 's' : ''));
                $io->listing($list);

                $extractedMessagesCount += $domainMessagesCount;
            }

            if ($input->getOption('output-format') == 'xlf') {
                $errorIo->comment('Xliff output version is <info>1.2</info>');
            }

            $resultMessage = sprintf('%d message%s successfully extracted', $extractedMessagesCount, $extractedMessagesCount > 1 ? 's were' : ' was');
        }

        if ($input->getOption('no-backup') === true) {
            $this->writer->disableBackup();
        }

        // save the files
        if ($input->getOption('force') === true) {
            $errorIo->comment('Writing files...');

            $bundleTransPath = false;
            foreach ($transPaths as $path) {
                $path .= 'translations';
                if (is_dir($path)) {
                    $bundleTransPath = $path;
                }
            }

            if (!$bundleTransPath) {
                $bundleTransPath = end($transPaths).'translations';
            }

            $this->writer->writeTranslations($operation->getResult(), $input->getOption('output-format'), array('path' => $bundleTransPath, 'default_locale' => $this->defaultLocale));

            if (true === $input->getOption('dump-messages')) {
                $resultMessage .= ' and translation files were updated';
            }
        }

        $errorIo->success($resultMessage.'.');
    }

    private function filterCatalogue(MessageCatalogue $catalogue, $domain)
    {
        $filteredCatalogue = new MessageCatalogue($catalogue->getLocale());

        if ($messages = $catalogue->all($domain)) {
            $filteredCatalogue->add($messages, $domain);
        }
        foreach ($catalogue->getResources() as $resource) {
            $filteredCatalogue->addResource($resource);
        }
        if ($metadata = $catalogue->getMetadata('', $domain)) {
            foreach ($metadata as $k => $v) {
                $filteredCatalogue->setMetadata($k, $v, $domain);
            }
        }

        return $filteredCatalogue;
    }
}