var express = require('express');
const request = require('request');const TARGET_URL = 'https://api.line.me/v2/bot/message/reply'
const TOKEN = '6lwsXwectIjTZ1NWp6c1t5l8nXaOjWgfeYfTOWNRRTVftaXMb4eSMj2zeficMr4/FWtyPPBuUB120kxZp58bwDilssdU5Uhc4mWz4kCPfcgiEcVwzXUktbYRE3xKAJU1zdYAsZZvI+87KY8qZvaRngdB04t89/1O/w1cDnyilFU='
const fs = require('fs');
const path = require('path');
const HTTPS = require('https');
const fetch = require('node-fetch');
const domain = "2018102235.oss2021.tk"
const sslport = 23023;
const bodyParser = require('body-parser');
var app = express();
var command = '';
app.use(bodyParser.json());
app.post('/hook', function (req, res) {

    var eventObj = req.body.events[0];
    var source = eventObj.source;
    var message = eventObj.message;
    // request log
    console.log('======================', new Date() ,'======================');
    console.log('[request]', req.body);
    console.log('[request source] ', source);
    console.log('[request message]', message);
    if(message.text === '김프'){
        command = '김프';
    }
    else{
        if(command === '김프'){
            kimp(eventObj.replyToken, message.text);
        }
    }


    
    res.sendStatus(200);
});

function kimp(replyToken,message){

  var upbitPrice = 0;
  function korean_price(){
      var promise = new Promise(function(resolve,reject){
        const url = 'https://api.upbit.com/v1/candles/minutes/1?market=KRW-'+message+'&count=1';
        const options = {method: 'GET', headers: {Accept: 'application/json'}};
        fetch(url, options)
        .then(res => res.json())
        .then(json => {
            upbitPrice = json[0].trade_price;
            resolve(upbitPrice);
        })
        .catch(err => console.error('error:' + err));  
      });
      return promise;
  } 
  korean_price().then(function(upbitPrice){
    request.post(
      {
          url: TARGET_URL,
          headers: {
              'Authorization': `Bearer ${TOKEN}`
          },
          json: {
              "replyToken":replyToken,
              "messages":[
                  {
                      "type":"text",
                      "text":String(upbitPrice)
                  },
              ]
          }
      },(error, response, body) => {
          console.log(body)
    });
    res.sendStatus(200);
  }); 
}


try {
    const option = {
      ca: fs.readFileSync('/etc/letsencrypt/live/' + domain +'/fullchain.pem'),
      key: fs.readFileSync(path.resolve(process.cwd(), '/etc/letsencrypt/live/' + domain +'/privkey.pem'), 'utf8').toString(),
      cert: fs.readFileSync(path.resolve(process.cwd(), '/etc/letsencrypt/live/' + domain +'/cert.pem'), 'utf8').toString(),
    };
  
    HTTPS.createServer(option, app).listen(sslport, () => {
      console.log(`[HTTPS] Server is started on port ${sslport}`);
    });
  } catch (error) {
    console.log('[HTTPS] HTTPS 오류가 발생하였습니다. HTTPS 서버는 실행되지 않습니다.');
    console.log(error);
  }