package main

import (
	"embed"
	"flag"
	"log"
	"net/http"
)

//go:embed static/index.html
var staticFiles embed.FS

func main() {
	streamerAddr := flag.String("streamer", "127.0.0.1:44500", "MARTe2 UDP streamer address (host:port)")
	listenAddr := flag.String("listen", ":8080", "HTTP listen address")
	clientPort := flag.Int("clientport", 44900, "Local UDP port to bind for streamer data")
	flag.Parse()

	hub := NewHub()
	go hub.Run()

	udpClient := NewUDPClient(*streamerAddr, *clientPort, hub)
	go udpClient.Run()

	// Serve the embedded index.html at /.
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/" {
			http.NotFound(w, r)
			return
		}
		data, err := staticFiles.ReadFile("static/index.html")
		if err != nil {
			http.Error(w, "index.html not found", http.StatusInternalServerError)
			return
		}
		w.Header().Set("Content-Type", "text/html; charset=utf-8")
		w.Write(data)
	})

	http.HandleFunc("/ws", hub.HandleWebSocket)

	log.Printf("WebUI listening on %s  (streamer=%s, local UDP port=%d)",
		*listenAddr, *streamerAddr, *clientPort)
	if err := http.ListenAndServe(*listenAddr, nil); err != nil {
		log.Fatalf("http: %v", err)
	}
}