package TPLinkClient

import (
	"fmt"
	"net"
	"time"
)

func sendPacket(packet []byte) {
	addr, err := net.ResolveUDPAddr("udp", "255.255.255.255:29808")
	if err != nil {
		fmt.Println("Could not resolve UDP addr")
		return
	}
	conn, err := net.DialUDP("udp", nil, addr)
	if err != nil {
		fmt.Println("Failed to dial UDP")
		return
	}
	defer conn.Close()
	conn.Write(packet)
}

func recvPacket(buf *[]byte) int {
	listen_addr, err := net.ResolveUDPAddr("udp", "255.255.255.255:29809")
	if err != nil {
		fmt.Println("Could not resolve UDP addr")
		return -1
	}
	listener, err := net.ListenUDP("udp", listen_addr)
	if err != nil {
		fmt.Println("Failed to dial UDP")
		return -1
	}
	defer listener.Close()

	// Time out after three seconds
	listener.SetReadDeadline(time.Now().Add(3 * time.Second))

	len, _, err := listener.ReadFrom(*buf)
	if err != nil {
		return -1
	}
	return len
}