<?php
// +----------------------------------------------------------------------
// | 天诚科技 [ 刘海东 17600099397赋能开发者，助力企业发展 ]
// +----------------------------------------------------------------------
// | Copyright (c) 2016~2020 https://www.tczxkj.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed 该系统并不是自由软件，未经许可不能去掉相关版权
// +----------------------------------------------------------------------
// | Author:甘肃天诚志信电子商务有限公司 刘海东 联系电话维系17600099397
// +----------------------------------------------------------------------

namespace service;

use think\Request;
use service\JsonService;

class VodService
{

    protected static $method = 'GET'; //获取方式

    protected static $AccessKeyId = ''; //阿里云AccessKeyId

    protected static $accessKeySecret = ''; //阿里云AccessKeySecret


    final static function init()
    {
        self::$AccessKeyId = SystemConfigService::get('accessKeyId');//阿里云AccessKeyId
        self::$accessKeySecret = SystemConfigService::get('accessKeySecret');//阿里云AccessKeySecret
        if (self::$AccessKeyId == '' || self::$accessKeySecret == '') return JsonService::fail('阿里云AccessKeyId或阿里云AccessKeySecret没有配置');
    }

    /**获取视频上传地址和凭证
     * @param string $videoId
     * @param string $FileName
     * @param string $type 1=获取视频上传凭证 2=获取视频播放凭证 3=获取视频播放地址 4=删除完整视频
     */
    public static function videoUploadAddressVoucher($FileName = '', $type = 1, $videoId = '', $image = '')
    {
        self::init();
        $apiParams = [];
        $site_url = SystemConfigService::get('site_url');
        $region = SystemConfigService::get('configuration_item_region');
        $cate_id = SystemConfigService::get('cate_id');
        if ($site_url) {
            $arr = parse_url($site_url);
            if ($arr['scheme']) {
                $scheme = $arr['scheme'];
            } else {
                $scheme = 'http';
            }
        } else {
            $scheme = 'http';
        }
        $requestUrl = $scheme . '://vod.' . $region . '.aliyuncs.com/?';
        if ($videoId != '' && $type == 1) {
            $apiParams['Action'] = 'RefreshUploadVideo';
            $apiParams['VideoId'] = $videoId;
        } else if ($videoId != '' && $type == 2) {
            $apiParams['Action'] = 'GetVideoPlayAuth';
            $apiParams['VideoId'] = $videoId;
        } else if ($videoId != '' && $type == 3) {
            $apiParams['Action'] = 'GetPlayInfo';
            $apiParams['VideoId'] = $videoId;
        } else if ($videoId != '' && $type == 4) {
            $apiParams['Action'] = 'DeleteVideo';
            $apiParams['VideoIds'] = $videoId;
        } else if ($videoId == '' && $type == 1) {
            $apiParams['Action'] = 'CreateUploadVideo';
            $apiParams['Title'] = self::video_name($FileName);
            $apiParams['FileName'] = $FileName;
            $apiParams['CoverURL'] = $image;
            $apiParams['CateId'] = $cate_id;
        }
        $apiParams['AccessKeyId'] = self::$AccessKeyId;
        $apiParams['Format'] = 'JSON';
        $apiParams['SignatureMethod'] = 'HMAC-SHA1';
        $apiParams['SignatureVersion'] = '1.0';
        $apiParams['SignatureNonce'] = md5(uniqid(mt_rand(), true));
        $apiParams['Timestamp'] = gmdate('Y-m-d\TH:i:s\Z');
        $apiParams['Version'] = '2017-03-21';
        $apiParams['Signature'] = self::computeSignature($apiParams, self::$accessKeySecret);
        foreach ($apiParams as $apiParamKey => $apiParamValue) {
            $requestUrl .= "$apiParamKey=" . urlencode($apiParamValue) . '&';
        }
        return substr($requestUrl, 0, -1);
    }

    public static function signString($source, $accessSecret)
    {
        return base64_encode(hash_hmac('sha1', $source, $accessSecret, true));
    }

    /**
     * 视频名称
     */
    public static function video_name($FileName)
    {
        return mb_substr(substr($FileName, strrpos($FileName, '.') + 1), 0, 128, 'utf8');
    }

    /**签名机制
     * @param $parameters
     * @param $accessKeySecret
     * @return mixed
     */
    public static function computeSignature($parameters, $accessKeySecret)
    {
        ksort($parameters);
        $canonicalizedQueryString = '';
        foreach ($parameters as $key => $value) {
            $canonicalizedQueryString .= '&' . self::percentEncode($key) . '=' . self::percentEncode($value);
        }
        $stringToBeSigned =
            self::$method . '&%2F&' . self::percentEncode(substr($canonicalizedQueryString, 1));
        return self::signString($stringToBeSigned, $accessKeySecret . '&');
    }

    /**
     * @param $str
     * @return string|string[]|null
     */
    public static function percentEncode($str)
    {
        $res = urlencode($str);
        $res = str_replace(array('+', '*'), array('%20', '%2A'), $res);
        $res = preg_replace('/%7E/', '~', $res);
        return $res;
    }
}