/* eslint-disable no-console */
const got = require("got");

const { CloudEvent } = require("cloudevents");
const WebSocket = require("ws");
const wss = new WebSocket.Server({ port: 8080 });

const api = "https://api.openweathermap.org/data/2.5/weather";
const key = process.env.OPEN_WEATHER_API_KEY || "REPLACE WITH API KEY";

console.log("WebSocket server started. Waiting for events.");

wss.on("connection", function connection(ws) {
  console.log("Connection received");
  ws.on("message", function incoming(message) {
    console.log(`Message received: ${message}`);
    const event = new CloudEvent(JSON.parse(message));
    fetch(event.data.zip)
      .then((weather) => {
        const response = new CloudEvent({
          datacontenttype: "application/json",
          type: "current.weather",
          source: "/weather.server",
          data: weather,
        });
        ws.send(JSON.stringify(response));
      })
      .catch((err) => {
        console.error(err);
        ws.send(
          JSON.stringify(
            new CloudEvent({
              type: "weather.error",
              source: "/weather.server",
              data: err.toString(),
            }),
          ),
        );
      });
  });
});

function fetch(zip) {
  const query = `${api}?zip=${zip}&appid=${key}&units=imperial`;
  return new Promise((resolve, reject) => {
    got(query)
      .then((response) => resolve(JSON.parse(response.body)))
      .catch((err) => reject(err.message));
  });
}