const express = require('express');
const request = require('request');
const talk = require('./talk')

const fs = require('fs');
const path = require('path');
const HTTPS = require('https');
const bodyParser = require('body-parser');


const TARGET_URL = 'https://api.line.me/v2/bot/message/reply'
const tokens = JSON.parse(fs.readFileSync("setting.json"))
const sslport = 23023;
const domain = tokens.domain
const TOKEN = tokens.channel
const id = tokens.id
const pw = tokens.pw

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

// https://developers.line.biz/en/reference/messaging-api/#image-message
// OR
// https://developers.line.biz/en/reference/messaging-api/#location-message

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

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);

    sendText(eventObj.replyToken, talk.start(id, pw)) // Test only
    //sendImage(eventObj.replyToken)

    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);
}