import config from "$config";
import { g, s } from "$lib/db";
import { err } from "$lib/logging";
import { sleep } from "$lib/utils";
import got from "got";
import WebSocket from "ws";

export let rate;
let last;
let ws;
const connect = async () => {
  if (ws && ws.readyState === 1 && Date.now() - last < 5000) return;
  if (ws) ws.terminate() && (await sleep(Math.round(Math.random() * 1000)));

  ws = new WebSocket("wss://stream.binance.com:9443/ws/btcusdt@miniTicker");

  ws.onmessage = async (event) => {
    try {
      const msg = JSON.parse(event.data);
      const rates = (await g("rates")) || {};
      const { fx } = (await g("fx")) || {};
      if (!fx) return;

      Object.keys(fx).map((symbol) => {
        rates[symbol] = msg.c * fx[symbol];
      });

      try {
        rates.IRT = (
          (await got(
            "https://api.nobitex.ir/v2/orderbook/BTCIRT",
          ).json()) as any
        ).lastTradePrice;
      } catch (e) {}

      rate = msg.c;
      s("rate", rate);
      s("rates", rates);
      last = Date.now();
    } catch (e) {
      console.log(e);
      err("binance message error", e.message);
    }
  };

  ws.onerror = async (error) => {
    err("binance socket error", error.message);
  };

  return ws;
};

export const getFx = async () => {
  connect();

  let date = 0;
  let fx = await g("fx");
  if (fx) ({ date, fx } = fx);

  if (Date.now() - date > 24 * 60 * 60 * 1000) {
    date = Date.now();
    try {
      if (config.fixer) {
        ({ rates: fx } = (await got(
          `http://data.fixer.io/api/latest?access_key=${config.fixer}&base=USD`,
        ).json()) as any);
      } else {
        ({ fx } = (await got("https://coinos.io/api/fx").json()) as any);
      }

      const USD = fx.USD;

      Object.keys(fx).map((k) => {
        fx[k] = fx[k] / USD;
      });

      await s("fx", { date, fx });
    } catch (e) {
      err("error fetching rates", e.message);
    }
  }

  setTimeout(getFx, 30000);
};