const dis = require('discord.js');
const bot = new dis.Client();
const fs = require('fs')
const readline = require('readline');
const {google} = require('googleapis');
const SCOPES = ['https://www.googleapis.com/auth/drive'];
const TOKEN_PATH = 'token.json';
let auth = ''
fs.readFile('credentials.json', (err, content) => {
    if (err) return console.log('Error loading client secret file:', err);
    // Authorize a client with credentials, then call the Google Sheets API.
    authorize(JSON.parse(content),fetchAuth);
  });

function fetchAuth(authc){
    auth=authc
}

function authorize(credentials, callback) {
    const {client_secret, client_id, redirect_uris} = credentials.installed;
    const oAuth2Client = new google.auth.OAuth2(
        client_id, client_secret, redirect_uris[0]);

    fs.readFile(TOKEN_PATH, (err, token) => {
      if (err) return getNewToken(oAuth2Client, callback);
      oAuth2Client.setCredentials(JSON.parse(token));
      callback(oAuth2Client);
    });
}

function getNewToken(oAuth2Client, callback) {
    const authUrl = oAuth2Client.generateAuthUrl({
      access_type: 'offline',
      scope: SCOPES,
    });
    console.log('Authorize this app by visiting this url:', authUrl);
    const rl = readline.createInterface({
      input: process.stdin,
      output: process.stdout,
    });
    rl.question('Enter the code from that page here: ', (code) => {
      rl.close();
      oAuth2Client.getToken(code, (err, token) => {
        if (err) return console.error('Error while trying to retrieve access token', err);
        oAuth2Client.setCredentials(token);
        fs.writeFile(TOKEN_PATH, JSON.stringify(token), (err) => {
          if (err) return console.error(err);
          console.log('Token stored to', TOKEN_PATH);
        });
        callback(oAuth2Client);
      });
    });
}

let ServerChannel = bot.channels.get('379245458461163532');
let prefix = '.';
bot.on('ready',() => {
    bot.user.setActivity(`with ${prefix} prefix.`);
});

bot.on('message',(msg) =>{
    if(msg.content.startsWith(prefix)){
        let command = msg.content.substr(1);
        command = command.split(' '); // spliting
        if(command[0] === 'prefix'){
            prefix = command[1];
            msg.channel.send(`Prefix has been changed to ${prefix}`);
            bot.user.setActivity(`with ${prefix} prefix.`);
        } else if(command[0] === 'script'){
            const sheets = google.sheets({version: 'v4', auth});
            var request = {
                spreadsheetId:'1SXOqxmJiX_U9LDEn4uPa8Wp-DTBceq8rR5ymA_csmoU',
                range:'Sheet1!A1:A1',
                valueInputOption:'',
                resource:{
                    range:'A1',
                    values:[
                        [command[1]]
                    ]
                }
            };
            sheets.spreadsheets.values.update(request, function(err, response) {
                if (err) {
                  msg.channel.send(`An error occured while updating the Google Sheet, ${err}`);
                  return;
                } else{
                  msg.channel.send('Successfully updated the Google sheet, expecting the roblox server to get this message.');
                };
            });
        };
    };
});

bot.login('something');