const express = require('express')
const { GraphQLClient, gql } = require("graphql-request");
const request = require('request');
const fs = require('fs');
const path = require('path');

const app = express()
const port = 3000



const url = "https://www.kuaishou.com/graphql";

var pcursor = "";
var userId = "";
var feeds = [];
var index = 0;

const client = new GraphQLClient(url)



app.get('/down', (req, res) => {
  userId = req.query.id;
  getFeeds()
  res.end('Hello World!')
});

async function getFeeds() {
  const query = gql`
      query visionProfilePhotoList($pcursor: String, $userId: String, $page: String, $webPageArea: String) {
        visionProfilePhotoList(pcursor: $pcursor, userId: $userId, page: $page,webPageArea: $webPageArea) {
             result,llsid,webPageArea,feeds {
               type,author {
                 id,name,following,headerUrl,headerUrls { 
                   cdn,url
                 }          
               },
               tags {  
                 type,name          
               },     
               photo {  
                 id,duration,caption,likeCount,realLikeCount,coverUrl,coverUrls { 
                   cdn,url    
                 }, 
                 photoUrls { 
                   cdn,url    
                 }, 
                 photoUrl,liked,timestamp,expTag,animatedCoverUrl,stereoType,videoRatio,profileUserTopPhoto
               },
               canAddComment,currentPcursor,llsid,status             
             },
             hostName,pcursor         
         }
      }
    `

  const variables = {
    pcursor: pcursor,
    userId: userId,
    page: 'profile'
  };

  const requestHeaders = {
    Cookie: 'kpf=PC_WEB; kpn=KUAISHOU_VISION; clientid=3; did=web_cf504812c13b0458cbdcc5bc9ea39691; client_key=65890b29; userId=58344290; kuaishou.server.web_st=ChZrdWFpc2hvdS5zZXJ2ZXIud2ViLnN0EqABq_TLWokR1HCFOInz6xuXy_kvuyQzzFhSSHR6_VuGW5G8r7X0I7jaXdIsvNLtzMihRfZy3IC6ZuErdyrv9JpRcK-I1orA8PsLE5yjof_RUiU85_sdhL_6PHbQY-gBM9-5SGcguwtpmc6gGpP6ztlEeucgq4S3KC668-TGkcoNATOo_JmyYuf1jvjxaHtwe1dznn-qQYr1ypIHiwzl00MKRBoSnIqSq99L0mk4jolsseGdcwiNIiC82HgSYpfCs7fFoo9D2LxFDjCTkWKnva615o7eqi8GgSgFMAE; kuaishou.server.web_ph=ccabd46f69a02c96deaa4092dc0d1595c15e',
    Host: "www.kuaishou.com",
    Origin: "https://www.kuaishou.com",
    Referer: "https://www.kuaishou.com/profile/3x3f8rfq39drzey",
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36"
  }

  const { visionProfilePhotoList } = await client.request(query, variables, requestHeaders)

  pcursor = visionProfilePhotoList.pcursor;
  feeds = visionProfilePhotoList.feeds;

  downVideo()

}

function downVideo() {
  if (!fs.existsSync(`mp4/${userId}`)) {
    fs.mkdirSync(path.join(__dirname, `/mp4/${userId}`), 0o777)
  }

  request(feeds[index].photo.photoUrl).pipe(fs.createWriteStream(path.join(__dirname, `/mp4/${userId}/${feeds[index].photo.id}.mp4`)))
  index += 1;
  if (index < feeds.length) {
    downVideo()
  } else {
    index = 0;
    feeds = [];
    if (pcursor != "no_more") {
      getFeeds();
    }
  }
}

app.listen(port, () => {
  console.log(`you app is run http://127.0.0.1:${port}`);
});