import rp from "request-promise";

const api_url = ({ market, crypto, currency }) => `https://api.cryptowat.ch/markets/${market}/${crypto}${currency}/summary`;
const currencies = {
  usd: ({ val }) => `\$${val}`,
  usdt: ({ val }) => `\$${val}`,
  eur: ({ val }) => `${val}€`,
  eth: ({ val }) => `${val}Ξ`,
  btc: ({ val }) => `${val}฿`,
  xmr: ({ val }) => `${val} xmr`,
  xrp: ({ val }) => `${val} xrp`
};
const markets = {
  btc: "coinbase",
  eth: "coinbase",
  xmr: "bitfinex",
  xrp: "poloniex"
};

export default bot => {
  bot._trigger.set("coins", new bot.trigger({
    call: /^(\.|\/)(btc|eth|xmr|xrp)/i,
    f: e => {
      let currency = e.args[0] || "eur";
      if(e.cmd === "xrp")
        currency = "usdt";

      cryptowat_summary(e.cmd, markets[e.cmd], currency).then(
        resolve => e.reply(resolve),
        reject => e.reply(reject)
      );
    }
  }));
};

const cryptowat_summary = (crypto, market, currency) => {
  return new Promise((resolve, reject) => {
    if (!Object.keys(currencies).includes(currency) || crypto === currency)
      reject(`Can't convert or invalid currency: ${currency}`);
    rp([{ market: market, crypto: crypto, currency: currency }].map(api_url).join``, { json: true })
      .then(res => {
        console.log(res);
        if (res.length === 0)
          reject("No data received");
        const data = {
          last: [{ val: res.result.price.last }].map(currencies[currency]).join``,
          high: [{ val: res.result.price.high }].map(currencies[currency]).join``,
          low: [{ val: res.result.price.low }].map(currencies[currency]).join``,
          change: (res.result.price.change.percentage * 100).toFixed(2),
          volume: res.result.volume
        };
        resolve(`Current: [b]${data.last}[/b] - High: [b]${data.high}[/b] - Low: [b]${data.low}[/b] - Change: [b]${data.change}[/b]% - Volume: [b]${data.volume}[/b]`);
      })
      .catch(err => {
        reject("lol cryptowatch ist down");
      });
  });
};