package lab

import (
	"io"
	"net"
	// "os"
	"time"
	// "sync"
)

func NotMain() {

	TestServer()
	// f, err := os.Open("/home/shared/Workplan/CoSync/lab/")
	// if err != nil {
	// 	panic(err)
	// }
	// files, err := f.Readdir(0)
	// if err != nil {
	// 	panic(err)
	// }

	// for _, v := range files {
	// 	println(v.Name(), v.IsDir())
	// }
}

func Server() {

	listener, err := net.Listen("tcp", "localhost:4945")
	if err != nil {
		panic(err)
	}
	defer listener.Close()

	conn, err := listener.Accept()
	if err != nil {
		panic(err)
	}
	defer conn.Close()

	msg, err := io.ReadAll(conn)
	if err != nil {
		panic(err)
	}

	conn.Write([]byte("hello from server"))
	io.Closer.Close(conn)

	print("[SERVER] ", conn.RemoteAddr().String(), "  : ")
	println(string(msg))

}

func Client(message string) {
	srv, err := net.Dial("tcp", "localhost:4945")
	if err != nil {
		panic(err)
	}
	defer srv.Close()

	// format message
	// msg := make([]byte, 0)
	// msg = append(msg, []byte(message)...)
	msg2 := []byte(message)

	srv.Write(msg2)
	println("[Client]  Wrote msg")

	//TODO: reprise
	var b []byte
	b2, err :=srv.Read(b)
	if err != nil {
		panic(err)
	}
	println("[Client]  Read msg : " + string(b2))
}

func TestServer() {
	go Server()
	go Client("this is a test")

	time.Sleep(3 * time.Second)
	println("[Main]  finished")
}