var express = require('express');
const request = require('request');
const TARGET_URL = 'https://api.line.me/v2/bot/message/reply'
const TOKEN = '채널 토큰으로 변경'
const fs = require('fs');
const path = require('path');
const HTTPS = require('https');
const domain = "도메인 변경"
const sslport = 23023;

var client_id = 'YOUR_CLIENT_ID';
var client_secret = 'YOUR_CLIENT_SECRET';

const bodyParser = require('body-parser');
var app = express();
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] ', eventObj.source);
    console.log('[request message]', eventObj.message);

    if (true) {
        var api_url = 'https://openapi.naver.com/v1/search/news?query=' + encodeURI(message.text); // json 결과
        var options = {
            url: api_url,
            headers: {'X-Naver-Client-Id':client_id, 'X-Naver-Client-Secret': client_secret}
         };
         request.get(options, function (error, response, body) {
            const obj = JSON.parse(body);
            const str = JSON.stringify(obj.items[0]);
            const obj2 = JSON.parse(str);
            if (!error && response.statusCode == 200) {
              request.post(
                  {
                      url: TARGET_URL,
                      headers: {
                        'Authorization': `Bearer ${TOKEN}`
                      },              
                      json: {
                        "replyToken":eventObj.replyToken,
                        "messages": [
                            {
                            "type":"text",
                            "text": JSON.stringify(obj2.link)
                            },
                            {
                             "type":"text",
                             "text": JSON.stringify(obj2.description).replace(/<[^>]*>?/g, '')
                            }
                        ]
                    }
                  },(error, response, body) => {
                    console.log(body)
                }
              )
            } else {
              res.status(response.statusCode).end();
              console.log('error = ' + response.statusCode);
            }
          });

    }

    if (message.text == 'help') {
        request.post(
            {
                url: TARGET_URL,
                headers: {
                    'Authorization': `Bearer ${TOKEN}`
                },
                json: {
                    "replyToken":eventObj.replyToken,
                    "messages":[
                        {
                            "type":"text",
                            "text":"반갑습니다. 주식 알리미 입니다."
                        },
                        {
                            "type":"text",
                            "text":"주식 관련 뉴스를 원하시면 \'뉴스\' 입력 후 원하는 종목을 검색하세요."
                        }
                    ]
                }
            },(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);
  }