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<?php

declare(strict_types=1);

namespace Mautic\LeadBundle\Command;

use Mautic\CoreBundle\Service\ProcessQueue;
use Mautic\LeadBundle\Deduplicate\ContactDeduper;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Helper\ProgressBar;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
use Symfony\Component\Process\Process;
use Symfony\Component\Stopwatch\Stopwatch;

class DeduplicateCommand extends Command
{
    public const NAME = 'mautic:contacts:deduplicate';

    public function __construct(
        private ContactDeduper $contactDeduper,
        private ParameterBagInterface $params
    ) {
        parent::__construct();
    }

    public function configure(): void
    {
        parent::configure();

        $this->setName(self::NAME)
            ->addOption(
                '--newer-into-older',
                null,
                InputOption::VALUE_NONE,
                'By default, this command will merge older contacts and activity into the newer. Use this flag to reverse that behavior.'
            )
            ->addOption(
                '--batch',
                null,
                InputOption::VALUE_REQUIRED,
                'How many contact duplicates to process at once. Defaults to 100.',
                100
            )
            ->addOption(
                '--processes',
                null,
                InputOption::VALUE_REQUIRED,
                'The commands can run in multiple PHP processes. This option defines how many processes to run. Defaults to 1.',
                1
            )
            ->setHelp(
                <<<'EOT'
The <info>%command.name%</info> command will dedpulicate contacts based on unique identifier values. 

<info>php %command.full_name%</info>
EOT
            );
    }

    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        $newerIntoOlder  = (bool) $input->getOption('newer-into-older');
        $batch           = (int) $input->getOption('batch');
        $processes       = (int) $input->getOption('processes');
        $uniqueFields    = $this->contactDeduper->getUniqueFields('lead');
        $duplicateCount  = $this->contactDeduper->countDuplicatedContacts(array_keys($uniqueFields));
        $stopwatch       = new Stopwatch();

        if (!$duplicateCount) {
            $output->writeln('<error>No contacts to deduplicate.</error>');

            return Command::FAILURE;
        }

        $stopwatch->start('deduplicate');

        $output->writeln('Deduplicating contacts based on unique identifiers: '.implode(', ', $uniqueFields));
        $output->writeln("{$duplicateCount} contacts found to deduplicate");

        $processQueue = new ProcessQueue($processes);
        $processCount = (int) ceil($duplicateCount / $batch);

        $output->writeln('');
        $output->writeln("Finding duplicates and creating processes for deduplication. {$processCount} processes will be queued.");

        $contactIds      = $this->contactDeduper->getDuplicateContactIds(array_keys($uniqueFields));
        $contactIdChunks = array_chunk($contactIds, $batch);
        foreach ($contactIdChunks as $contactIdBatch) {
            $command = [
                $this->params->get('kernel.project_dir').'/bin/console',
                DeduplicateIdsCommand::NAME,
                '--contact-ids',
                implode(',', $contactIdBatch),
                '-e',
                MAUTIC_ENV,
            ];

            if ($newerIntoOlder) {
                $command[] = '--newer-into-older';
            }

            $envParams = [
                'db_table_prefix'                     => MAUTIC_TABLE_PREFIX,
                'contact_unique_identifiers_operator' => $this->params->get('mautic.contact_unique_identifiers_operator'),
            ];

            $processQueue->enqueue(new Process($command, null, ['MAUTIC_CONFIG_PARAMETERS' => json_encode($envParams)]));
        }

        $output->writeln('');
        $output->writeln("Starting to execute the {$processCount} processes for deduplication. {$processes} processes will be executed in parallel.");

        $progressBar = new ProgressBar($output, $processCount);
        $progressBar->setFormat('debug');
        $progressBar->start();

        $processQueue->refresh();

        while ($processQueue->isProcessing()) {
            usleep(100);
            $processQueue->refresh();
            $progressBar->setProgress($processQueue->getProcessedCount());
        }

        $output->writeln('');
        $output->writeln('');
        $output->writeln('All processes have finished. The output of each process is below.');

        foreach ($processQueue->getProcessed() as $process) {
            $output->writeln("<comment>{$process->getCommandLine()}</comment>");
            if (0 === $process->getExitCode()) {
                $output->writeln("<info>{$process->getOutput()}</info>");
            } else {
                $output->writeln("<error>{$process->getErrorOutput()}</error>");
            }
        }

        $progressBar->finish();

        $event = $stopwatch->stop('deduplicate');
        $output->writeln('');
        $output->writeln("Duration: {$event->getDuration()} ms, Memory: {$event->getMemory()} bytes");

        return Command::SUCCESS;
    }

    protected static $defaultDescription = 'Merge contacts based on same unique identifiers';
}