var express = require('express');
const request = require('request');
const TARGET_URL = 'https://api.line.me/v2/bot/message/reply'
const TOKEN = '' // 라인 토큰
const fs = require('fs');
const path = require('path');
const HTTPS = require('https');
const domain = "www.weatherchatbot.ml" // 도메인
const sslport = 23023;
const bodyParser = require('body-parser');
var app = express();
const { info } = require('console');

var {PythonShell} = require('python-shell');

var options = {
    
    mode: 'text',
    pythonPath: '',
    pythonOptions: ['-u'],
    scriptPath:'',
    args: ['value1, value2, value3']

};
var pyshell = new PythonShell('weather_chat.py');

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(eventObj.message.text == "설명"){
        chatInfo(eventObj.replyToken);
    } 
    else if(eventObj.message.text == "이용방법") {
        chatUse(eventObj.replyToken);
    }
    else if(eventObj.message.text == "오늘의 날씨는?") {
        chatWeather(eventObj.replyToken);
    }
    else {
        chatWrong(eventObj.replyToken);
    }

    res.sendStatus(200);
});

function chatInfo(replyToken){
    request.post(
        {
            url: TARGET_URL,
            headers: {
                'Authorization': `Bearer ${TOKEN}`
            },
            json: {
                "replyToken":replyToken,
                "messages":[
                    {
                        "type":"text",
                        "text":"서울 지역의 오늘의 날씨와 기온에 따른 옷차림새를 추천해줍니다."
                    }
                ]
            }
        },(error, response, body) => {
            console.log(body)
        });
}

function chatUse(replyToken){
    request.post(
        {
            url: TARGET_URL,
            headers: {
                'Authorization': `Bearer ${TOKEN}`
            },
            json: {
                "replyToken":replyToken,
                "messages":[
                    {
                        "type":"text",
                        "text":"오늘의 날씨는? 을 똑같이\n입력해주시면 작동합니다."
                    }
                ]
            }
        },(error, response, body) => {
            console.log(body)
        });
}

function chatWeather(replyToken){

    pyshell.on('message', function (data) {
        console.log(data);

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

function chatWrong(replyToken){
    request.post(
        {
            url: TARGET_URL,
            headers: {
                'Authorization': `Bearer ${TOKEN}`
            },
            json: {
                "replyToken":replyToken,
                "messages":[
                    {
                        "type":"text",
                        "text":"잘못된 입력입니다.\n'설명', '이용방법', '오늘의 날씨는?' \n중 하나를 입력해주세요."
                    }
                ]
            }
        },(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);
  }