<?php
namespace App\Repositories;

use App\Models\Setting;
use Illuminate\Encryption\Encrypter;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Str;

class ToolRepository extends BaseRepository
{
    public function backupWeb(): array
    {
        $webRoot = base_path();
        $dirName = basename($webRoot);
        $filename = sprintf('%s/%s.web.%s.tar.gz', sys_get_temp_dir(), $dirName, date('Ymd.His'));
        $command = sprintf(
            'tar --exclude=vendor --exclude=.git -czf %s -C %s %s',
            $filename, dirname($webRoot), $dirName
        );
        $result = exec($command, $output, $result_code);
        do_log(sprintf(
            "command: %s, output: %s, result_code: %s, result: %s, filename: %s",
            $command, json_encode($output), $result_code, $result, $filename
        ));
        return compact('result_code', 'filename');
    }

    public function backupDatabase()
    {
        $connectionName = config('database.default');
        $config = config("database.connections.$connectionName");
        $filename = sprintf('%s/%s.database.%s.sql', sys_get_temp_dir(), basename(base_path()), date('Ymd.His'));
        $command = sprintf(
            'mysqldump --user=%s --password=%s --port=%s --single-transaction --databases %s >> %s',
            $config['username'], $config['password'], $config['port'], $config['database'], $filename,
        );
        $result = exec($command, $output, $result_code);
        do_log(sprintf(
            "command: %s, output: %s, result_code: %s, result: %s, filename: %s",
            $command, json_encode($output), $result_code, $result, $filename
        ));
        return compact('result_code', 'filename');
    }

    public function backupAll(): array
    {
        $backupWeb = $this->backupWeb();
        if ($backupWeb['result_code'] != 0) {
            throw new \RuntimeException("backup web fail: " . json_encode($backupWeb));
        }
        $backupDatabase = $this->backupDatabase();
        if ($backupDatabase['result_code'] != 0) {
            throw new \RuntimeException("backup database fail: " . json_encode($backupDatabase));
        }
        $filename = sprintf('%s/%s.%s.tar.gz', sys_get_temp_dir(), basename(base_path()), date('Ymd.His'));
        $command = sprintf(
            'tar -czf %s -C %s %s -C %s %s',
            $filename,
            dirname($backupWeb['filename']), basename($backupWeb['filename']),
            dirname($backupDatabase['filename']), basename($backupDatabase['filename'])
        );
        $result = exec($command, $output, $result_code);
        do_log(sprintf(
            "command: %s, output: %s, result_code: %s, result: %s, filename: %s",
            $command, json_encode($output), $result_code, $result, $filename
        ));
        return compact('result_code', 'filename');

    }

    /**
     * do backup cronjob
     *
     * @return array|false
     */
    public function cronjobBackup()
    {
        $setting = Setting::get('backup');
        if ($setting['enabled'] != 'yes') {
            do_log("Backup not enabled.");
            return false;
        }
        $now = now();
        $frequency = $setting['frequency'];
        $settingHour = (int)$setting['hour'];
        $settingMinute = (int)$setting['minute'];
        $nowHour = (int)$now->format('H');
        $nowMinute = (int)$now->format('i');
        do_log("Backup frequency: $frequency");
        if ($frequency == 'daily') {
            if ($settingHour != $nowHour) {
                do_log(sprintf('Backup setting hour: %s != now hour: %s', $settingHour, $nowHour));
                return false;
            }
            if ($settingMinute != $nowMinute) {
                do_log(sprintf('Backup setting minute: %s != now minute: %s', $settingMinute, $nowMinute));
                return false;
            }
        } elseif ($frequency == 'hourly') {
            if ($settingMinute != $nowMinute) {
                do_log(sprintf('Backup setting minute: %s != now minute: %s', $settingMinute, $nowMinute));
                return false;
            }
        } else {
            throw new \RuntimeException("Unknown backup frequency: $frequency");
        }
        $backupResult = $this->backupAll();
        do_log("Backup all result: " . json_encode($backupResult));
        if ($backupResult['result_code'] != 0) {
            throw new \RuntimeException("Backup all fail.");
        }
        $clientId = $setting['google_drive_client_id'] ?? '';
        $clientSecret = $setting['google_drive_client_secret'] ?? '';
        $refreshToken = $setting['google_drive_refresh_token'] ?? '';
        $folderId = $setting['google_drive_folder_id'] ?? '';

        if (empty($clientId)) {
            do_log("No google_drive_client_id, won't do upload.");
            return false;
        }
        if (empty($clientSecret)) {
            do_log("No google_drive_client_secret, won't do upload.");
            return false;
        }
        if (empty($refreshToken)) {
            do_log("No google_drive_refresh_token, won't do upload.");
            return false;
        }
        do_log("Google drive info: clientId: $clientId, clientSecret: $clientSecret, refreshToken: $refreshToken, folderId: $folderId");

        $client = new \Google_Client();
        $client->setClientId($clientId);
        $client->setClientSecret($clientSecret);
        $client->refreshToken($refreshToken);
        $service = new \Google_Service_Drive($client);
        $adapter = new \Hypweb\Flysystem\GoogleDrive\GoogleDriveAdapter($service, $folderId);
        $filesystem = new \League\Flysystem\Filesystem($adapter);

        $filename = $backupResult['filename'];
        $upload_result = $filesystem->put(basename($filename), fopen($filename, 'r'));
        $backupResult['upload_result'] = $upload_result;
        do_log("Final result: " . json_encode($backupResult));
        return $backupResult;
    }

    public function getEncrypter(string $key): Encrypter
    {
        return new Encrypter($key, 'AES-256-CBC');
    }
}