package main

import (
	"flag"
	"fmt"
	"net/http"
	_ "net/http/pprof"
	"os"
	"os/signal"

	"dev.narayana.im/narayana/telegabber/config"
	"dev.narayana.im/narayana/telegabber/xmpp"

	log "github.com/sirupsen/logrus"
	"github.com/zelenin/go-tdlib/client"
	goxmpp "gosrc.io/xmpp"
)

var version string = "1.9.6"
var commit string

var sm *goxmpp.StreamManager
var component *goxmpp.Component
var err error

var cleanupDone chan struct{}
var sigintChannel chan os.Signal

func main() {
	if commit != "" {
		version = fmt.Sprintf("%v-%v", version, commit)
	}

	var profilingPort = flag.Int("profiling-port", 0, "The port for pprof server")
	// YAML config, compatible with the format of Zhabogram 2.0.0
	var configPath = flag.String("config", "config.yml", "Config file path")
	// JSON schema (not for editing by a user)
	var schemaPath = flag.String("schema", "./config_schema.json", "Schema file path")
	// Folder for Badger DB of message ids
	var idsPath = flag.String("ids", "ids", "Ids folder path")
	var versionFlag = flag.Bool("version", false, "Print the version and exit")
	flag.Parse()

	if *versionFlag {
		fmt.Printf("%v\n", version)
		os.Exit(0)
	}

	if *profilingPort > 0 {
		go func() {
			log.Println(http.ListenAndServe(fmt.Sprintf("localhost:%v", *profilingPort), nil))
		}()
	}

	cleanupDone = make(chan struct{})
	sigintChannel = make(chan os.Signal, 1)
	signal.Notify(sigintChannel, os.Interrupt)

	config, err := config.ReadConfig(*configPath, *schemaPath)
	if err != nil {
		log.Fatal(err)
	}

	client.SetLogVerbosityLevel(&client.SetLogVerbosityLevelRequest{
		NewVerbosityLevel: stringToTdlibLogConstant(config.Telegram.Loglevel),
	})
	SetLogrusLevel(config.XMPP.Loglevel)

	log.Infof("Starting telegabber version %v", version)

	sm, component, err = xmpp.NewComponent(config.XMPP, config.Telegram, *idsPath)
	if err != nil {
		log.Fatal(err)
	}

	go func() {
		<-sigintChannel
		log.Error("Interrupting...")
		exit()

		os.Exit(0)
	}()

	// reconnect automatically
	err = sm.Run()
	exit()

	if err != nil {
		<-cleanupDone
		log.Fatal(err)
		// bye
		os.Exit(-1)
	}
}

var tdlibLogConstants = map[string]int32{
	":fatal":   0,
	":error":   1,
	":warn":    2,
	":info":    3,
	":debug":   4,
	":verbose": 5,
	":all":     1023,
}

func stringToTdlibLogConstant(c string) int32 {
	level, ok := tdlibLogConstants[c]
	if !ok {
		level = 0
	}

	return level
}

func exit() {
	xmpp.Close(component)
	close(cleanupDone)
}