package discovery

import (
	"context"
	"net"

	"github.com/bboozzoo/mconnect/logger"
)

type Listener struct {
	conn *net.UDPConn
}

func NewListener() (*Listener, error) {
	addr := net.UDPAddr{
		Port: 1714,
	}
	conn, err := net.ListenUDP("udp", &addr)
	if err != nil {
		return nil, err
	}

	listener := &Listener{
		conn: conn,
	}

	return listener, nil
}

func (l *Listener) Receive(ctx context.Context) {
	log := logger.FromContext(ctx)
	buf := make([]byte, 4096)
	count, addr, err := l.conn.ReadFromUDP(buf)
	if err != nil {
		log.Printf("listen failed: %v", err)
	}

	log.Printf("got %v bytes from %v", count, addr)
	log.Printf("data:\n%s", string(buf))
}