<?php

declare(strict_types=1);

namespace App;

use Symfony\Component\Console\Attribute\AsCommand;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Style\SymfonyStyle;
use App\Template\Twig;
use App\Notification\Notification;
use App\Rclone\Rclone;
use DateTime;

#[AsCommand(
    name: 'backup',
    description: 'Start backup to assigned buckets',
)]
class CommandBackup extends Command
{
    protected function configure(): void
    {
        $this->addArgument(
            'config',
            InputArgument::REQUIRED,
            'Configuration file'
        );
    }

    /**
     * Start the backup process.
     *
     * 1. Read the configuration file.
     * 2. For each configured backup entry
     *    1. Get the size of the source
     *    2. Get the size of the destination
     *    3. Perform the backup
     *    4. Get the new size of the destination
     *    5. Send push notifications.
     * 3. Report final success
     */
    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        $sio = new SymfonyStyle($input, $output);
        $sio->title('Start backup process');

        try {
            $app = new App((string)$input->getArgument('config'));
        } catch (\Throwable $e) {
            $sio->error('Configuration error:' . $e->getMessage());
            return Command::FAILURE;
        }

        $rclone = new Rclone((string)$app->getConfig('rclone.path'));
        $rclone->setLogger($app->getLogger()->withName('rclone'));

        $notification = new Notification();
        /** @var array<array-key,array<string,string>> */
        $notificationConfig = $app->getConfig('notification');
        $notification->loadMany($notificationConfig);

        /** @var array<string,string> */
        $templateConfig = $app->getConfig('templates');
        $render = new Twig($templateConfig);

        /** @var array{title: string, source: string, destination: string}[] */
        $backupElements = $app->getConfig('backup');
        /** @var array{title: string, source: string, destination: string}  $conf */
        foreach ($sio->progressIterate($backupElements) as $conf) {
            $title = $conf['title'];
            try {
                $template = array();
                $template['config'] = $conf;
                $template['start'] = new DateTime();
                $template['source_size'] = $rclone->getSize($conf['source']);
                $template['rclone_version'] = $rclone->getVersion();
                $template['destination_size_before'] = $rclone->getSize($conf['destination']);

                /** @var array<array-key, string> */
                $rcloneOptions = $app->getConfig('rclone.options');
                $rclone->copy($conf['source'], $conf['destination'], $rcloneOptions);

                $template['destination_size_after'] = $rclone->getSize($conf['destination']);
                $template['end'] = new DateTime();

                $message = $render->render('notify', $template);
            } catch (\Exception $e) {
                $message = $e->getMessage();
                $sio->error($message);
            }

            $notification->send($title, $message);
        }

        $sio->success("Complete");
        return Command::SUCCESS;
    }
}