const { EventEmitter } = require('events');
const axios = require('axios');
const log = require('loglevel');

class XMRData extends EventEmitter {
    constructor() {
        super();
    }

    get initial() {
        return { binance: null, };
    }

    start() {
        this.fetch();

        setInterval(() => {
            this.fetch();
        }, 30000);
    }

    fetch() {
        Promise.all([
            axios.get("https://bitpay.com/api/rates/eur").catch(err => log.error(err.config.url, err.message)),
            axios.get("https://api.binance.com/api/v3/ticker/price?symbol=XMRBTC").catch(err => log.error(err.config.url, err.message)),
        ]).then(resp => {
            let bitpay = null, binance = null;

            if (resp[0] != undefined) {
                bitpay = resp[0].data.rate;

                if (resp[1] != undefined) {
                    binance = (Math.round((bitpay * resp[1].data.price) * 100) / 100) + "€";
                }
            }

            this.emit("data", { binance });
        });
    }
}

module.exports = new XMRData();