<?php

namespace storage;

use FceskyUpload\contract\FileInfo;
use FceskyUpload\UploadManager;
use FceskyUpload\drivers\LocalDriver;

class LocalUploader
{
    private $config = [];
    private $domain = "";
    private $_error = "";

    public function __construct($conf = [])
    {
        $this->config = [
            'disks' => [
                'local' => [
                    'driver' => LocalDriver::class, //上传类
                    'save_dir' => app()->getRootPath() . 'public/attachment', //上传保存路径
                    'file_path' => '/attachment', //上传保存路径
                    'tmp_dir' => root_path('runtime' . DIRECTORY_SEPARATOR . 'uploadtmp'),//临时目录
                    'slice_first' => 0, //从第几片开始
                ],
                //继续添加其它仓库
            ],
            'default' => [
                'disk' => 'local', //默认磁盘
                'extensions' => 'jpg,png,mp4', //后缀
                'mimeTypes' => 'image/*,video/*', //类型
                'middlewares' => [], //中间件数组
                'maxSize' => 1 * 1024 * 1024,  //单包最大上传大小 2M
            ]
        ];

    }


    /**文件上传
     * @param $data
     * @param $file
     * @return array
     */
    public function uploadFile($data, $file)
    {

        if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
            exit; // finish preflight CORS requests here
        }

        try {
            //处理部分数据
            $data['size'] = $file->getSize();
            $data['name'] = $file->getOriginalName();
            $data['ext'] = $file->extension();
            //检测文件大小
            if (!$this->checkSize($data['size'])) {
                $this->_error = "超出文件上传大小限制";
                return ['code' => -1, 'data' => []];
            }
            $config = $this->config;
            $uploadManager = new UploadManager($config);
            $fileInfo = new FileInfo();
            $fileInfo->identifier = $data['hash'];
            $fileInfo->filename = $data['name'];

            $fileInfo->chunkNumber = $data['chunk'] ?? 0;;
            $fileInfo->chunkNumber = intval($fileInfo->chunkNumber ?? 0);

            //未设置分片数量 则默认总数为1 当前为0
            $fileInfo->totalChunks = $data['chunks'] ?? 1;
            $fileInfo->totalChunks = intval($fileInfo->totalChunks ?? 1);
            $fileInfo->totalChunks = ($fileInfo->totalChunks > 0) ? $fileInfo->totalChunks : 1;
            $fileInfo->totalSize = $data['size'];
            //获取后缀

            $fileInfo->ext = $data['ext'];
            if (!$this->checkFileType($fileInfo->ext)) {
                $this->_error = "禁止上传的文件类型";
                return ['code' => -1, 'data' => []];
            }

            $upload = $uploadManager->uploadFile($fileInfo);
            //如果文件较小 直接上传完成
            if (isset($upload['savepath']) && $upload['code'] == 0) {
                $upload = $this->buildFileUrl($upload);
                return ['code' => 1, 'data' => $upload, 'msg' => '成功'];
            }
            $check = $uploadManager->checkFile($fileInfo);
            //如果上传完成
            if (isset($check['savepath']) && $check['code'] == 0) {
                $check = $this->buildFileUrl($check);
                return ['code' => 1, 'data' => $check];
            } else {
                $this->_error = "文件包不完整";
                return ['code' => 0, 'data' => $check];
            }
        } catch (\Exception $e) {
            $this->_error = $e->getMessage();
            return ['code' => -1, 'data' => $e->getMessage()];
        }
    }


    /**
     * 处理文件
     * 扩展包存在问题 ，考虑后续更新 尽量不更改扩展包，在这里做文件的处理
     */
    public function buildFileUrl($data)
    {

        if (isset($data['savepath']) && $data['savepath'] != '') {

            $conf = $this->config;
            //获取除域名外的文件路径
            $save_dir = $conf['disks'][$conf['default']['disk']]['save_dir'];
            $file_path = str_replace($save_dir, '', $data['savepath']);
            //拼接域名
            $data['save_path'] = $conf['disks'][$conf['default']['disk']]['file_path'] . $file_path;
            $data['file_path'] = $this->domain . $data['save_path'];
            //删除多余的信息
            unset($data['savepath']);
            unset($data['code']);
        }
        return $data;
    }

    //检测文件上传大小
    public function checkSize($file_size)
    {

        if ($file_size > $this->config['default']['maxSize']) {
            return false;
        }
        return true;
    }


    /**检测文件类型
     * @param $file_ext
     * @return array|bool
     */
    public function checkFileType($file_ext)
    {    //获取配置信息
        $extensions = $this->config['default']['extensions'];

        //为空或者为 * 表示不过滤
        if ($extensions == "" || $extensions == '*') {
            return true;
        }
        //字符转换成数组
        $exts = explode(',', $extensions);
        if (in_array($file_ext, $exts)) {
            $this->_error = "禁止上传该类型文件";
            return ['code' => 0, 'data' => ''];
        }
        return true;
    }


    /**
     * 检测文件分片情况
     */
    public function checkFile($hash,$count){

        $filePath = $this->config['disks'][$this->config['default']['disk']]['tmp_dir'] . $hash; //临时分片文件路径

//        dump($filePath);
        //检查分片是否存在
        $chunkExists = [];
        for ($index = 0; $index < $count; $index++) {
            if (file_exists("{$filePath}_{$index}")) {
                array_push($chunkExists, $index);
            }
        }
        //分片有缺失，返回已存在的分片
        $res['uploaded'] = $chunkExists;
        return $res;
    }


    /**
     * 删除文件
     * @param $path
     */
    public function deleteFile($path){
       $path =  app()->getRootPath() . 'public'.$path;
       if (file_exists($path)){
           @unlink($path);
       }
       return true;
    }

    /**
     * 返回报错
     * @return string
     */
    public function getError()
    {
        return $this->_error;
    }

}