package events

import (
	"context"
	"log"
	"strings"

	"github.com/OktopUSP/oktopus/backend/services/mtp/adapter/internal/events/handler"
	"github.com/OktopUSP/oktopus/backend/services/mtp/adapter/internal/nats"
	"github.com/nats-io/nats.go/jetstream"
)

func StartEventsListener(ctx context.Context, js jetstream.JetStream, h handler.Handler) {

	events := []string{
		nats.MQTT_STREAM_NAME,
		nats.WS_STREAM_NAME,
		nats.STOMP_STREAM_NAME,
		nats.LORA_STREAM_NAME,
		nats.OPC_STREAM_NAME,
	}

	for _, event := range events {
		go func() {
			consumer, err := js.Consumer(ctx, event, event)
			if err != nil {
				log.Fatalf("Failed to get consumer: %v", err)
			}
			messages, err := consumer.Messages()
			if err != nil {
				log.Fatalf("Failed to get consumer messages: %v", err)
			}
			defer messages.Stop()
			for {
				msg, err := messages.Next()
				if err != nil {
					log.Println("Error to get next message:", err)
					continue
				}

				data := msg.Data()

				log.Printf("Received message, subject: %s", msg.Subject())

				subject := strings.Split(msg.Subject(), ".")
				msgType := subject[len(subject)-1]
				device := subject[len(subject)-2]

				switch msgType {
				case "status":
					h.HandleDeviceStatus(device, msg.Subject(), data)
				case "info":
					h.HandleDeviceInfo(device, msg.Subject(), data, event)
				default:
					//ignoreMsg(msg.Subject(), "status", msg.Data())
				}
				msg.Ack()
			}
		}()
	}
}