package app

import (
	"flag"
	"os"
	"os/signal"
	"syscall"

	cml04eventer "git.espin.casa/albert/cml04-eventer"
	"git.espin.casa/albert/cml04-gdm-int/pkg/api"
	"git.espin.casa/albert/cml04-l2-rsm-in/internal/logging"
	"git.espin.casa/albert/cml04-l2-rsm-in/internal/server"
	"git.espin.casa/albert/cml04-l2-rsm-in/internal/service"
	"git.espin.casa/albert/logger"
	"google.golang.org/grpc"
	"google.golang.org/grpc/credentials/insecure"
)

func Run() error {
	// flags
	l2InAddr := flag.String("l2-in-addr", "0.0.0.0:5012", "tcp l2 server address")
	apiAddr := flag.String("l2-out-addr", "localhost:3333", "tcp adress")
	nsqAddr := flag.String("nsq-addr", "10.1.152.13", "nsq server address")
	nsqPort := flag.Int("nsq-port", 4150, "nsq server port")
	logLevel := flag.String("log-level", "debug", "trace debug level")
	flag.Parse()
	// setup logger
	log := logger.New(os.Stdout, *logLevel)
	// log fields
	logFields := logger.LogFields{
		"log_level":     *logLevel,
		"l2_in_address": *l2InAddr,
		"api_adress":    *apiAddr,
		"nsq_address":   *nsqAddr,
		"nsq_port":      *nsqPort,
	}
	// create event publisher
	publisher, err := cml04eventer.NewPublisher(&cml04eventer.PublisherImplConfig{
		NSQAddress: *nsqAddr,
		NSQPort:    *nsqPort,
		Marshaler:  cml04eventer.JSONMarshaler{},
	}, log)
	if err != nil {
		log.Error("failed to create event publisher", err, logFields)
		return err
	}
	defer publisher.Close()
	// api dial
	conn, err := grpc.Dial(*apiAddr, grpc.WithTransportCredentials(insecure.NewCredentials()))
	if err != nil {
		log.Error("failed to dial api server", err, logger.LogFields{})
	}
	// create api client
	client := api.NewRollDataServiceClient(conn)
	defer conn.Close()
	// create service
	svc := service.NewService(client, publisher)
	svc = logging.NewLoggingService(log, svc)
	// create server
	server := server.NewServer(*l2InAddr, log, svc)
	// start tcp server (telegrams)
	go func() {
		if err := server.Run(); err != nil {
			log.Error("server error", err, logFields)
		}
	}()
	// info banner
	log.Info("started cml04-l2-rsm-in telegram service", logFields)
	// wait signal to finish
	signal := WaitSignal()
	log.Info("signal received", logFields.Add(logger.LogFields{
		"signal": signal,
	}))
	return nil
}

// WaitSignal catching exit signal
func WaitSignal() os.Signal {
	ch := make(chan os.Signal, 2)
	signal.Notify(
		ch,
		syscall.SIGINT,
		syscall.SIGQUIT,
		syscall.SIGTERM,
	)
	for {
		sig := <-ch
		switch sig {
		case syscall.SIGINT, syscall.SIGQUIT, syscall.SIGTERM:
			return sig
		}
	}
}