package main

import (
	"git.xdrm.io/gws/upgrader"
	"fmt"
	"net"
	"os"
	"time"
)

func main() {

	/* (1) Create listening socket
	---------------------------------------------------------*/
	/* (1) Create socket */
	lsock, err := net.Listen("tcp", ":4444")
	if err != nil {
		panic(err)
	}

	/* (2) Accept clients */
	for {

		sock, err := lsock.Accept()
		if err != nil {
			os.Stderr.WriteString(fmt.Sprintf("Connection error: %s\n", err))
			return
		}

		go manageClient(sock)

	}

}

func manageClient(sock net.Conn) {

	startTime := time.Now().UnixNano()

	defer sock.Close()

	for {

		fmt.Printf("+ new client\n")

		fmt.Printf("  + upgrade\n")
		err := upgrader.Upgrade(sock)

		if err != nil {
			fmt.Printf("    + error: %s\n", err)
			return
		}
		fmt.Printf("  + 2-way exchange\n")

		break;

	}

	fmt.Printf("+ elapsed: %1.1f us\n", float32(time.Now().UnixNano()-startTime)/1e3)

}