const express = require('express');
const router = express.Router();
const axios = require('axios')
const {google} = require('googleapis')


// TAKEN FROM OUR ALLEGRO APP CONFIGURATION  --> https://apps.developer.allegro.pl/
const ALLEGRO_AUTH_TOKEN_URL = "https://allegro.pl/auth/oauth/token"

const REDIRECT_URI = "https://dropshipping.xaos.ninja"
const CLIENT_ID = "a9c8b58fa80e4daeb81ddcc342a0820d"
const CLIENT_SECRET = "7EVOUTJgNZTfh8RWTelS4oDHyML2dP5Y88qN84oCQ4SJCSt4sQcxvNrzjFp9igwC"

// GOOGLE DOCS API

const GOOGLE_CLIENT_ID = "811597362147-fekutrahfqdovhl073pdmevpjnctas2t.apps.googleusercontent.com"
const GOOGLE_CLIENT_SECRET = "eHig0XC6WhYqaFRX5Mcoxqf9"
const SCOPE = ["https://www.googleapis.com/auth/spreadsheets"]

const oAuth2Client = new google.auth.OAuth2(GOOGLE_CLIENT_ID, GOOGLE_CLIENT_SECRET)

/* GET home page. */
router.get('/', function (req, res, next) {
    const query = req?.query

    const code = req?.query?.code
    // when we are redirected from Allegro
    if (query.code && !query.scope) {
        const credentials = Buffer.from(`${CLIENT_ID}:${CLIENT_SECRET}`).toString("base64")
        axios.post(ALLEGRO_AUTH_TOKEN_URL, null, {
            params: {
                grant_type: "authorization_code",
                code: code,
                redirect_uri: REDIRECT_URI
            },
            headers: {"Authorization": `Basic ${credentials}`}
        }).then(response => {
            const {access_token, refresh_token} = response.data
            res.render('index', {
                allegro_access_token: access_token,
                allegro_refresh_token: refresh_token,
                google_auth_url: "",
                google_tokens_json: "",
            });
        })
        //when we are redirected from Google
    } else if (query.code && query.scope) {
        oAuth2Client.getToken({code: code, redirect_uri: REDIRECT_URI})
            .then(response => {
                const google_tokens_json  = JSON.stringify(response.tokens)
                res.render('index', {
                    allegro_access_token: "",
                    allegro_refresh_token: "",
                    google_auth_url: "",
                    google_tokens_json: google_tokens_json
                })
            })
        //when we just enter the page
    } else {
        const authUrl = oAuth2Client.generateAuthUrl({
            access_type: 'offline',
            scope: SCOPE,
            redirect_uri: REDIRECT_URI,
            prompt: 'consent'
        })
        res.render('index', {
            allegro_access_token: "",
            allegro_refresh_token: "",
            google_auth_url: authUrl,
            google_tokens_json: "",
        });
    }

});

module.exports = router;