const express = require('express');
const unirest = require('unirest');
const mimelib = require("mimelib");
const app = express();
const nodemailer = require('nodemailer');
const base64 = require('base-64');
const utf8 = require('utf8');

var transporter = nodemailer.createTransport({
    service: 'Gmail',
    auth: {
        user: '4game.redirecter@gmail.com',
        pass: 'test4game'
    }
});

let sendedIds = [];

let emails = [
    'mrmike@artandcraftentertainment.com',
    'raymond@artcraftent.com',
    'samantha@artcraftent.com',
    'morgan@artcraftent.com',
    'max@artcraftent.com',
    'bill@artcraftent.com',
    'michael@artcraftent.com',
    'tom@artcraftent.com'
];
const output = '<b>4game Redirecter.</b> <br><br> Perform redirect emails from smtp-mock.test4game.com to your real mail <br><br> API: <br><br>1) /add?email=... <br><br>2) /print';



app.get('/', function (req, res) {
       res.send(output);
});

app.get('', function (req, res) {
       res.send(output);
});

app.get('/add', function (req, res) {
    let obj = {};
    obj.email = req.query.email;
    obj.list = [];
    emails.push(obj);

    res.send(`Email ${req.query.email} has been added.`);
});

app.get('/delete', function (req, res) {
    for(let i = 0; i < emails.length; i++) {
        if(emails[i].email === req.query.email) {
            emails.splice(i, 1);
            break;
        }
    }
    res.send(`Email ${req.query.email} has been deleted.`);
});

app.get('/print', function (req, res) {
    let output = '';

    emails.forEach(email => {
        output += email + '<br>';
    });

    res.send(output);
});

app.listen(3001);

const checkSended = (id, created) => {
    return sendedIds.indexOf(id) > -1 || Math.abs(new Date(created) - new Date()) > 86400000;
};

const doRedirect = () => {
    emails.forEach(email => {
        console.log(`REQUEST https://smtp-mock.test4game.com/api/v2/search?kind=to&query=${email}`);
        unirest.get(`https://smtp-mock.test4game.com/api/v2/search?kind=to&query=${email}`)
            .headers({ })
            .send({ })
            .end((response) => {

                for(let i = 0; i < response.body.items.length; i++) {
                    const id = response.body.items[i].ID;
                    const created = response.body.items[i].Created;
                    const subject = mimelib.decodeMimeWord(response.body.items[i].Content.Headers.Subject[0]);
                    let msg = '';
                    if(response.body.items[i].Content.Headers["Content-Transfer-Encoding"][0] === 'base64') {
                        msg = utf8.decode(base64.decode(response.body.items[i].Content.Body));
                    }
                    msg = mimelib.decodeQuotedPrintable(response.body.items[i].Content.Body);

                    if(checkSended(id, created) === false) {
                        console.log(`Email with id ${id} was sended to ${email}`);
                        transporter.sendMail({
                            from: '4game.redirecter@gmail.com',
                            to: email,
                            subject: subject,
                            html: msg
                        });
                        sendedIds.push(id);
                    }
                }
            });
    });

    sleep();
};

const sleep = () => {
    setTimeout(doRedirect, 5000);
};

doRedirect();