var express = require('express');
const request = require('request');
const PUSH_TARGET_URL = 'https://api.line.me/v2/bot/message/push'
const REPLY_TARGET_URL = 'https://api.line.me/v2/bot/message/reply'
const TOKEN = 'Zd+BLpi6wLHMngB3EK74S1W7ApnAXuYZ86xGIi60JKrSW0xI0JyXlCzpunYxk9fxtOkH4y2/CNrb6K7WYldpXBwUkCKNIyEQ04AUpQKQ1EzS6C3qm6y5sBm0zs/Gmzn6n1v1jLfmSpxyLir7VqHk5wdB04t89/1O/w1cDnyilFU='
const fs = require('fs');
const path = require('path');
const HTTPS = require('https');
const domain = "osschatbot.tk"
const sslport = 23023;

const bodyParser = require('body-parser');
var app = express();
app.use(bodyParser.json());

const foodArr = [
    {index : 1, kr_name: "한식", en_name: 'korean food'}, 
    {index : 2, kr_name: "중식", en_name: 'chinese food'}, 
    {index : 3, kr_name: "양식", en_name: 'western food'}, 
    {index : 4, kr_name: "일식", en_name: 'japanese food'}, 
    {index : 5, kr_name: "분식", en_name: 'snack food'}, 
    {index : 6, kr_name: "아시안", en_name: 'asian food'}, 
    {index: 7, kr_name: "패스트푸드", en_name: 'fast food'}, 
    {index: 8, kr_name: "학식", en_name: 'school food'}
];

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 food = foodArr.find(element => element.index ==  message.text || element.kr_name == message.text || element.en_name == message.text.toLowerCase());
    
    if (message.text == "안내" || message.text.toLowerCase() == "guide"){
        request.post(
            {
                url: REPLY_TARGET_URL,
                headers: {
                    'Authorization': `Bearer ${TOKEN}`
                },
                json: {
                    "replyToken":eventObj.replyToken,
                    "messages":[
                        {
                            "type":"sticker",
                            "packageId":"11538",
                            "stickerId":"51626517"
                        },
                        {
                            "type":"text",
                            "text":"안녕하세요\n"+
                            "음식추천 챗봇 쿠밥봇입니다\n\n"+
                            "원하시는 메뉴를 골라주세요\n\n"+
                            "1.한식2.중식3.양식\n"+
                            "4.일식.5.분식6.아시안\n"+
                            "7.패스트푸드8.학식"
                        },
                        {
                            "type":"text",
                            "text":"Welcome!!!\n" +
                            "I'm a food recommendation chatbot, KHUBABBOT\n"+
                            "Please choose the menu you want\n"+
                            "1. Korean food 2. Chinese food 3. Western food\n"+
                            "4. Japanese food 5. Snack food 6. Asian food\n"+
                            "7. Fast food 8. School food\n"
                        }
                    ]
                }
            },(error, response, body) => {
                console.log(body)
            });
        }
    else if (food !=  undefined){
        request.post(
            {
                url: REPLY_TARGET_URL,
                headers: {
                    Authorization: `Bearer ${TOKEN}`
                },
                json: {
                    "replyToken":eventObj.replyToken,
                    "messages":[
                        {
                            "type": "location",
                            "title": "my location",
                            "address": "1-6-1 Yotsuya, Shinjuku-ku, Tokyo, 160-0004, Japan",
                            "latitude": 37.5666805,
                            "longitude": 126.9784147
                        }
                    ]
                }
            },(error, response, body) => {
                console.log(body)
            });
    }
    else{
        request.post(
            {
                url:REPLY_TARGET_URL,
                headers:{
                    'Authorization' :`Bearer ${TOKEN}`
                },
                json:{
                    "replyToken": eventObj.replyToken,
                    "messages":[
                        {
                            "type" : "text",
                            "text":"음식을 다시 입력 해주세요."
                        },
                        {
                            "type" : "text",
                            "text":"Please enter the food again"
                        }
                    ]
                }
            }    
        )
    }
    
    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);
    }