<?php
namespace filesystem;

use Qiniu\Auth;
use Qiniu\Storage\UploadManager;
use Qiniu\Storage\BucketManager;

class Qiniu
{
    private $bucket = 'orico-official-website';
    private $access_key = 'dOsTum4a5qvhPTBbZRPX0pIOU7PZWRX7htKjztms';
    private $secret_key = 'KFxsGbnErkALFfeGdMa8QWTdodJbamMX0iznLe-q';

    private $rule = [
        'fileSize' => 1024 * 1024 * 50, // 默认最大上传5M
        'fileExt' => 'jpeg,jpg,png,mp4', // 默认上传文件后缀
        'fileMime' => 'image/jpeg,image/png,image/gif,video/mp4' // 默认上传文件mime
    ];

    private $dir = true;
    private $path_prefix = '';
    private $file_name_prefix = 'orico';
    private $keep_original_name = false;

    private $base_url = '//szw73dlk3.hn-bkt.clouddn.com';

    public function __construct($conf = [])
    {
        if (!empty($conf['base_url'])) {
            $this->base_url = $conf['base_url'];
        }
        if (!empty($conf['bucket'])) {
            $this->bucket = $conf['bucket'];
        }
        if (!empty($conf['access_key'])) {
            $this->access_key = $conf['access_key'];
        }
        if (!empty($conf['secret_key'])) {
            $this->secret_key = $conf['secret_key'];
        }
        if (!empty($conf['path_prefix'])) {
            $this->path_prefix = trim($conf['path_prefix'], '/');
        }
        if (!empty($conf['file_name_prefix'])) {
            $this->file_name_prefix = $conf['file_name_prefix'];
        }
        if (!empty($conf['keep_original_name'])) {
            $this->keep_original_name = $conf['keep_original_name'];
        }
    }

    /**
     * 生成随机字符串
     */
    private function random($length, $type = "string", $convert = "0")
    {
        $conf = [
            'number' => '0123456789',
            'string' => 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ',
            'all' => 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789='
        ];
        $string = $conf[$type];
        if (!$string) {
            $string = $conf['string'];
        }
        $strlen = strlen($string) - 1;
        $char = '';
        for ($i = 0; $i < $length; $i++) {
            $char .= $string[mt_rand(0, $strlen)];
        }
        if ($convert > 0) {
            $res = strtoupper($char);
        } elseif ($convert == 0) {
            $res = $char;
        } elseif ($convert < 0) {
            $res = strtolower($char);
        }
        return $res;
    }

    /**
     * 组装文件名
     */
    private function buildFileName()
    {
        return $this->file_name_prefix . time() . substr(time(), -5) . substr(microtime(), 2, 3) . $this->random(8);
    }

    /**
     * 上传验证规则
     */
    public function validate($rule)
    {
        $this->rule = $rule;
    }

    /**
     * 上传文件到七牛云
     */
    public function uploadFile($name)
    {
        // 构建鉴权对象
        $auth = new Auth($this->access_key, $this->secret_key);

        // 生成上传 Token
        $token = $auth->uploadToken($this->bucket);

        // 初始化 UploadManager 对象并进行文件的上传。
        $upload_mgr = new UploadManager();

        $file = request()->file($name);

        $aspect_ratio = [];
        if (!empty($this->rule['aspectRatio'])) {
            $aspect_ratio = $this->rule['aspectRatio'];
            unset($this->rule['aspectRatio']);
        }
        $validate = validate([$name => $this->rule]);
        if (!$validate->check([$name => $file])) {
            throw new \Exception($validate->getError());
        }

        $file_name = $file->getOriginalName(); // 文件原名
        if (!$this->keep_original_name) {
            $file_name = $this->buildFileName() . '.' . $file->extension();
            if (!$this->dir && !empty($this->path_prefix)) {
                $file_name = $this->path_prefix . '/' . $file_name;
            }
        }
        if ($this->dir) {
            $file_name = date('Ymd') . '/' . $file_name;
            if (!empty($this->path_prefix)) {
                $file_name = $this->path_prefix . '/' . $file_name;
            }
        }
        $file_path = $file->getPathname(); // 临时路径
        if (!empty($aspect_ratio)) { // 验证图片宽高
            list($width, $height, $type, $attr) = getimagesize($file);
            if ($width != $aspect_ratio['width'] || $height != $aspect_ratio['height']) {
                throw new \Exception('图片宽高不符合');
            }
        }
        $file_type = $file->getOriginalMime();
        list($ret, $err) = $upload_mgr->putFile($token, $file_name, $file_path, null, $file_type, false);

        if ($err !== null) {
            throw new \Exception($err);
        } else {
            return ['hash' => $ret['hash'], 'filename' => $ret['key'], 'remote_url' => $this->base_url . $ret['key']];
        }
    }

    /**
     * 上传文件到七牛云
     */
    public function deleteFile($name)
    {
        // 构建鉴权对象
        $auth = new Auth($this->access_key, $this->secret_key);
        // 初始化 BucketManager 对象并进行文件的删除。
        $bucket_mgr = new BucketManager($auth);
        $ret = $bucket_mgr->delete($this->bucket, $name);
        return $ret;
    }
}