// SPDX-License-Identifier: MIT
// SPDX-FileCopyrightText: 2022 mochi-co
// SPDX-FileContributor: mochi-co

package main

import (
	"flag"
	"github.com/rs/zerolog"
	"log"
	"os"
	"os/signal"
	"syscall"

	"github.com/mochi-co/mqtt/v2"
	"github.com/mochi-co/mqtt/v2/hooks/auth"
	"github.com/mochi-co/mqtt/v2/listeners"
)

func main() {
	tcpAddr := flag.String("tcp", ":1883", "network address for TCP listener")
	wsAddr := flag.String("ws", "", "network address for Websocket listener")
	infoAddr := flag.String("info", "", "network address for web info dashboard listener")
	path := flag.String("path", "", "path to data auth file")
	flag.Parse()

	sigs := make(chan os.Signal, 1)
	done := make(chan bool, 1)
	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
	go func() {
		<-sigs
		done <- true
	}()

	server := mqtt.New(&mqtt.Options{
		//Capabilities: &mqtt.Capabilities{
		//	ServerKeepAlive:              10000,
		//	ReceiveMaximum:               math.MaxUint16,
		//	MaximumMessageExpiryInterval: math.MaxUint32,
		//	MaximumSessionExpiryInterval: math.MaxUint32, // maximum number of seconds to keep disconnected sessions
		//	MaximumClientWritesPending:   65536,
		//	MaximumPacketSize:            0,
		//	MaximumQos:                   2,
		//},
	})
	l := server.Log.Level(zerolog.DebugLevel)
	server.Log = &l

	if *path != "" {
		data, err := os.ReadFile(*path)
		if err != nil {
			log.Fatal(err)
		}

		err = server.AddHook(new(auth.Hook), &auth.Options{
			Data: data,
		})
		if err != nil {
			log.Fatal(err)
		}
	} else {
		err := server.AddHook(new(auth.AllowHook), nil)
		if err != nil {
			log.Fatal(err)
		}
	}

	if *tcpAddr != "" {
		tcp := listeners.NewTCP("t1", *tcpAddr, nil)
		err := server.AddListener(tcp)
		if err != nil {
			log.Fatal(err)
		}
	}

	if *wsAddr != "" {
		ws := listeners.NewWebsocket("ws1", *wsAddr, nil)
		err := server.AddListener(ws)
		if err != nil {
			log.Fatal(err)
		}
	}

	if *infoAddr != "" {
		stats := listeners.NewHTTPStats("stats", *infoAddr, nil, server.Info)
		err := server.AddListener(stats)
		if err != nil {
			log.Fatal(err)
		}
	}

	go func() {
		err := server.Serve()
		if err != nil {
			log.Fatal(err)
		}
	}()

	<-done
	server.Log.Warn().Msg("caught signal, stopping...")
	server.Close()
	server.Log.Info().Msg("main.go finished")
}