//related ,相关歌单
// module.exports = (req, res, createWebAPIRequest, request) => {
//   const options = {
//     url: "http://music.163.com/playlist?id=" + req.query.id,
//     method: "GET",
//     headers: {
//       Referer: "http://music.163.com",
//       "User-Agent":
//         "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3380.0 Safari/537.36"
//     }
//   };
//   request(options, (error, response, body) => {
//     if (error) {
//       res.status(502).send("fetch error");
//     } else {
//       try {
//         const pattern = /<div class="cver u-cover u-cover-3">[\s\S]*?<img src="([^"]+)">[\s\S]*?<a class="sname f-fs1 s-fc0" href="([^"]+)"[^>]*>([^<]+?)<\/a>[\s\S]*?<a class="nm nm f-thide s-fc3" href="([^"]+)"[^>]*>([^<]+?)<\/a>/g;
//         const data = {playlists:[],code:200};
//         let result;
//         while ((result = pattern.exec(body)) != null)  {
//           data.playlists.push({
//             creator: {
//               userId: result[4].slice('/user/home?id='.length),
//               nickname: result[5]
//             },
//             coverImgUrl: result[1].slice(0,-('?param=50y50'.length)),
//             name: result[3],
//             id: result[2].slice('/playlist?id='.length)
//           });
//         }
//         res.send(JSON.stringify(data));
//       } catch (error) {
//         res.status(502).send("fetch error");
//       }
//     }
//   });
// };

module.exports = (query, request) => {
    return request(
        'GET', `http://music.163.com/playlist?id=${query.id}`, {},
        {ua: 'pc', cookie: query.cookie, proxy: query.proxy}
    )
    .then(response => {
        try{
            const pattern = /<div class="cver u-cover u-cover-3">[\s\S]*?<img src="([^"]+)">[\s\S]*?<a class="sname f-fs1 s-fc0" href="([^"]+)"[^>]*>([^<]+?)<\/a>[\s\S]*?<a class="nm nm f-thide s-fc3" href="([^"]+)"[^>]*>([^<]+?)<\/a>/g; 
            let result, playlists = []
            while((result = pattern.exec(response.body)) != null){
                playlists.push({
                    creator: {
                        userId: result[4].slice('/user/home?id='.length),
                        nickname: result[5]
                    },
                    coverImgUrl: result[1].slice(0,-('?param=50y50'.length)),
                    name: result[3],
                    id: result[2].slice('/playlist?id='.length)
                })
            }
            response.body = {code: 200, playlists: playlists}
            return response
        }
        catch(err){
            response.code = 500
            response.body = {code: 500, msg: err.stack}
            return Promise.reject(response)
        }
    })
}