package main

import (
	"log"
	"net/http"
	"sync"

	"github.com/gorilla/websocket"
)

type webSocketHandler struct {
	upgrader websocket.Upgrader
}

// GLOBALS
var connections int = 0
var wg sync.WaitGroup

func (wsh webSocketHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	//upgrade http connection to websocket
	connection, err := wsh.upgrader.Upgrade(w, r, nil)
	if err != nil {
		log.Printf("Error while upgrading connection to websocket: %s", err)
		return
	}
	connections++
	log.Printf("New websocket connection. There are now %v\n", connections)
	wg.Add(1)
	go func() {
		for {

		}
	}()
	defer connection.Close()
}

func main() {
	webSocketHandler := webSocketHandler{
		upgrader: websocket.Upgrader{},
	}
	var port string = "8080"
	http.Handle("/", webSocketHandler)
	wg.Add(1)
	log.Printf("listening on port %s...\n", port)
	log.Fatal(http.ListenAndServe("localhost:8080", nil))
	wg.Wait()
}