var express = require('express');
const request = require('request');
const TARGET_URL = 'https://api.line.me/v2/bot/message/reply'
const BROAD_TARGET_URL = 'https://api.line.me/v2/bot/message/broadcast'
const TOKEN = ''
const fs = require('fs');
const path = require('path');
const HTTPS = require('https');
const domain = "www.osschatbot2020.tk"
const sslport = 23023;

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);

    var isNationWide = message.text;
    var sub_nationwide = "국내";
    if(isNationWide.indexOf(sub_nationwide) !== -1){
        replyNationWide(eventObj);
    }
    else if(message.text == "야" || message.text == "도움말"){
        hello(eventObj)
    }

    res.sendStatus(200);
});

//reply
function replyNationWide(eventObj) {
    //read status
    var strings = ['날짜', '확진환자', '격리해제', '검사진행', '사망자']
    var fs = require('fs');
    var array = fs.readFileSync('status.txt').toString().split("\n");
    for(i in array) {
        strings[i] = array[i]
    }

    request.post(
        {
            url: TARGET_URL,
            headers: {
                'Authorization': `Bearer ${TOKEN}`
            },
            json: {
                "replyToken":eventObj.replyToken,
                "messages":[
                    {
                        "type":"text",
                        "text":strings[0]
                    },
                    {
                        "type":"text",
                        "text":strings[1]
                    },
                    {
                        "type":"text",
                        "text":strings[2]
                    },
                    {
                        "type":"text",
                        "text":strings[3]
                    },
                    {
                        "type":"text",
                        "text":strings[4]
                    },
                ]
            }
        },(error, response, body) => {
            console.log(body)
        });
}

//hello
function hello(eventObj) {
   
    request.post(
        {
            url: TARGET_URL,
            headers: {
                'Authorization': `Bearer ${TOKEN}`
            },
            json: {
                "replyToken":eventObj.replyToken,
                "messages":[
                    {
                        "type":"text",
                        "text":"안녕하십니까. 코로나 도우미 입니다."
                    },
                    {
                        "type":"text",
                        "text":"국내 현황은 '국내'를 타이핑 해주세요."
                    },
                    {
                        "type": "sticker",
                        "packageId": "11539",
                        "stickerId": "52114110"
                    }

                ]
            }
        },(error, response, body) => {
            console.log(body)
        });
}

// Broadcast
function broadcast(eventObj){
    request.post(
        {
            url: BROAD_TARGET_URL,
            headers: {
                'Authorization': `Bearer ${TOKEN}`
            },
            json: {
                "messages":[
                    {
                        "type":"text",
                        "text":"Hello, user"
                    },
                    {
                        "type":"text",
                        "text":"May I help you?"
                    }
                ]
            }
        },(error, response, body) => {
            console.log(body)
        });
}

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);
  }