<?php

namespace backend\modules\admin\services;

use common\enums\RabbitMqEnum;
use common\models\common\Backups;
use Exception;
use Yii;

/**
 * 数据备份
 * @package backend\modules\admin\services
 */
class BackupsService extends BaseService
{
    //获取备份数据列表
    public function getBackupsList($params)
    {
        try {
            $where = [
                ['!=', 'status', -1]
            ];
            if (!empty($params['datetime'][0])) $where[] = ['>=', 'created_at', strtotime($params['datetime'][0])];
            if (!empty($params['datetime'][1])) $where[] = ['<=', 'created_at', strtotime($params['datetime'][1]. ' 23:59:59')];
            $params['where'] = $where;
            $params['order'] = 'id desc';
            $list = Backups::listPage($params);
            return $list;
        } catch (\Exception $e) {
            throw new Exception($e->getMessage());
        }
    }

    //开始备份
    public function startBackups()
    {
        try {
            $check = Backups::getOne([
                ['status' => 0],
            ], true);
            if (!empty($check)) throw new Exception('存在备份中任务，请稍后再试');
            $data = [
                'name' => 'mysql-'. date('Y-m-d-H-i').'.sql.gz',
                'size' => '',
                'status' => 0,
                'type' => 1,
            ];
            $res = Backups::setData($data);
            if (!$res) throw new Exception(Backups::$static_error);
            Yii::$app->services->rabbitMq->push(RabbitMqEnum::EXCHANGE_LONG_DURATION, RabbitMqEnum::LONG_DURATION_QUEUE, ['id' => $res->id], BackupsService::class, 'backupsData');
            return true;
        } catch (\Exception $e) {
            throw new Exception($e->getMessage());
        }
    }

    //删除备份文件
    public function deleteBackups($params)
    {
        try {
            // $ids = explode(',', $params['id']);
            $where = [
                ['!=', 'status', -1]
            ];
            if (!empty($params['id'])) $where[] = ['id' => $params['id']];
            $list = Backups::lists(['where' => $where]);
            if (!empty($list)) {
                $ids = array_column($list, 'id');
                $res = Backups::updateAll(['status' => -1], ['id' => $ids]);
                if (!$res) throw new Exception(Backups::$static_error);
                foreach ($list as $key => $value) {
                    if (!empty($value['url'])) {
                        unlink($value['url']);
                    }
                }
            }
        } catch (\Exception $e) {
            throw new Exception($e->getMessage());
        }
    }

    //执行备份脚本
    public function backupsData($params)
    {
        try {
            if (is_dir('/www/wwwroot/qimall')) {
                $path = '/www/wwwroot/qimall/backend/web/uploads/backups';
                
            } else {
                $path = '/data/wwwroot/qimall/backend/web/uploads/backups';
            }
            if (!is_dir($path)) {
                @mkdir($path, 0777, true);
            }
            $info = Backups::getOne([
                ['id' => $params['id']],
            ]);
            if (!is_dir('/data'))  @mkdir('/data', 0777, true);
            if (!is_dir('/data/bak')) @mkdir('/data/bak', 0777, true);
            if (!is_dir('/data/bak/mysql')) @mkdir('/data/bak/mysql', 0777, true);
            //执行数据库备份脚本
            exec('sudo sh /scripts/bak_db.sh 2>&1', $result, $status);
            if (!empty($result)) {
                foreach ($result as $key => $value) {
                    if (strpos($value, 'Error') !== false) {
                        throw new Exception( json_encode($value) );
                    }
                }
            }
            // if( $status ) throw new Exception( json_encode($result) );
            echo '数据备份--数据库备份脚本执行完成';
            $url = $path .'/'.$info['name'];
            $source_path = '';
            if (file_exists('/data/bak/mysql/qimall-'.date('Y-m-d-H').'.sql.gz')) {
                echo '数据备份--查找备份文件成功';
                $source_path = '/data/bak/mysql/qimall-'.date('Y-m-d-H').'.sql.gz';
            } else {
                $time = time() - 3600;
                $source_path = '/data/bak/mysql/qimall-'.date('Y-m-d-H', $time).'.sql.gz';
            }
            echo '数据备份--'.$source_path;
            if (copy($source_path, $url)) {
                chmod($url, 0777);
                $info->url = $url;
                $info->status = 1;
                $info->size = file_exists($url) ? $this->transf_byte(filesize($url)) : 0;
            } else {
                echo '数据备份--copy备份文件失败';
                throw new Exception('copy备份文件失败');
            }
            // print_r($info);
            echo '数据备份--copy备份文件成功';
            if (!$info->save()) throw new Exception('保存数据失败');
            //获取全部备份数据
            $list = Backups::lists([
                'where' => [
                    ['!=', 'status', -1],
                ],
                'order' => 'id desc',
            ]);
            if (!empty($list)) {
                $ids = [];
                foreach ($list as $key => $value) {
                    if ($key >= 7) {
                        $ids[] = $value['id'];
                    }
                }
                //存在数据，则清除备份数据
                if (!empty($ids)) $this->deleteBackups(['id' => $ids]);
            }
        } catch (\Exception $e) {
            echo '数据备份--'.$e->getMessage();
            // print_r($e->getMessage());
            
            $info->status = 2;
            $info->desc = $e->getMessage();
            $info->save();
            Yii::error($e->getMessage());
            throw new Exception($e->getMessage());
        }
    }

    public function transf_byte($byte) {
        $kb = 1024;
        $mb = $kb * 1024;
        $gb = $mb * 1024;
        if ($byte < $kb) {
            return $byte . 'b';
        } else if ($byte < $mb) {
            return round($byte / $kb, 2) . 'kb';
        } else if ($byte < $gb) {
            return round($byte / $mb, 2) . 'mb';
        }
    }
}