package main

import (
	"bufio"
	"log"
	"net"
	"runtime/debug"

	"badat.dev/maeqtt/v2/mqtt/packets"
)

func main() {
	listen_addr := ":1883"
	listener, err := net.Listen("tcp", listen_addr)

	if err != nil {
		log.Fatal(err)
	}

	for {
		conn, err := listener.Accept()
		if err != nil {
			log.Println("Failed accepting connection ", err)
		}
		go handleConnection(conn)
	}
}

func handleConnection(con net.Conn) {
	defer handlePanic()

	reader := bufio.NewReader(con)

	packet, err := packets.ReadPacket(reader)
	if err != nil {
		log.Println("Error reading packet ", err)
		return
	}
	connect, isConn := (*packet).(packets.ConnectPacket)
	if !isConn {
		log.Println("Didn't recieve a connet packet")
		panic("TODO: Send a disconnect packet")
	}

	conn := NewConnection(connect, con)

	sess := NewSession(&conn, connect)
	sess.HandlerLoop()
}

func handlePanic() {
	if r := recover(); r != nil {
		log.Println("Recovering from panic:", r)
		log.Println("Stack Trace:")
		debug.PrintStack()
	}
}