#!/usr/bin/env -S deno run -A --watch

// get deno here: https://github.com/denoland/deno/releases and extract to /usr/local/bin ;)

async function handle(conn: Deno.Conn)
{
  const httpConn = Deno.serveHttp(conn);
  for await (const requestEvent of httpConn)
  {
    await requestEvent.respondWith(handleReq(requestEvent.request));
  }
}

function handleReq(req: Request): Response
{
  const upgrade = req.headers.get("upgrade") || "";
  if (upgrade.toLowerCase() != "websocket")
  {
    return new Response("request isn't trying to upgrade to websocket.");
  }
  const { socket, response } = Deno.upgradeWebSocket(req);
  socket.onopen = () =>
  {
      console.log("socket opened");
      let interval = setInterval(() =>
      {
          console.log("sending bite data..");
        try
        {
            socket.send('{"type": "biteData", "data": {"equipNo": 123}}');
        }
        catch(e)
        {
            clearInterval(interval);
            console.log("cleared");
        }
      }
      , 1000);
  }
  socket.onmessage = (e) =>
  {
    console.log("socket message:", e.data);
    socket.send(new Date().toString());
  };
  socket.onerror = (e) => console.log("socket errored:");//, e);
  socket.onclose = () => console.log("socket closed");
  return response;
}

const server = Deno.listen({ port: 8080 });


for await (const conn of server)
{
  handle(conn);
}