package server_test

import (
	"context"
	"fmt"
	"testing"
	"time"

	kgo "go.unistack.org/micro-broker-kgo/v3"
	requestid "go.unistack.org/micro-wrapper-requestid/v3"
	"go.unistack.org/micro/v3"
	"go.unistack.org/micro/v3/broker"
	"go.unistack.org/micro/v3/client"
	"go.unistack.org/micro/v3/codec"
	"go.unistack.org/micro/v3/logger"
	"go.unistack.org/micro/v3/logger/slog"
	"go.unistack.org/micro/v3/metadata"
	"go.unistack.org/micro/v3/server"

	"github.com/google/uuid"
)

type TestHandler struct {
	t *testing.T
}

type TestMessage struct {
	Name string
}

func (h *TestHandler) SingleSubHandler(ctx context.Context, msg *codec.Frame) error {
	log := logger.MustContext(ctx)
	log.Info(ctx, fmt.Sprintf("%s", msg.Data))
	return nil
}

func TestNoopSub(t *testing.T) {
	ctx := context.Background()

	b := broker.NewBroker()

	if err := b.Init(); err != nil {
		t.Fatal(err)
	}

	if err := b.Connect(ctx); err != nil {
		t.Fatal(err)
	}

	logger.DefaultLogger.Init(logger.WithLevel(logger.ErrorLevel))
	s := server.NewServer(
		server.Broker(b),
		server.Codec("application/octet-stream", codec.NewCodec()),
	)
	if err := s.Init(); err != nil {
		t.Fatal(err)
	}

	c := client.NewClient(
		client.Broker(b),
		client.Codec("application/octet-stream", codec.NewCodec()),
		client.ContentType("application/octet-stream"),
	)
	if err := c.Init(); err != nil {
		t.Fatal(err)
	}
	h := &TestHandler{t: t}

	if err := s.Subscribe(s.NewSubscriber("single_topic", h.SingleSubHandler,
		server.SubscriberQueue("queue"),
	)); err != nil {
		t.Fatal(err)
	}

	if err := s.Start(); err != nil {
		t.Fatal(err)
	}

	msgs := make([]client.Message, 0, 8)
	for i := 0; i < 8; i++ {
		msgs = append(msgs, c.NewMessage("batch_topic", &codec.Frame{Data: []byte(fmt.Sprintf(`{"name": "test_name %d"}`, i))}))
	}

	if err := c.BatchPublish(ctx, msgs); err != nil {
		t.Fatal(err)
	}

	defer func() {
		if err := s.Stop(); err != nil {
			t.Fatal(err)
		}
	}()
}

func TestConsumerAndServer(t *testing.T) {
	const (
		topicTarget  = "single_topic"
		addressKafka = "localhost:9092"
	)

	ctx := context.Background()
	logger.DefaultLogger = slog.NewLogger()
	logger.DefaultLogger.Init(logger.WithLevel(logger.DebugLevel))
	rh := requestid.NewHook()

	b := kgo.NewBroker(
		kgo.CommitInterval(1*time.Second),
		broker.Addrs(addressKafka),
		broker.Logger(logger.DefaultLogger.Clone(logger.WithLevel(logger.ParseLevel("error")))),
		broker.ErrorHandler(func(event broker.Event) error {
			msg := event.Message()
			log := logger.DefaultLogger.
				Fields("topic", event.Topic(),
					"header", msg.Header,
					"body", msg.Body)
			err := event.Ack()

			if err != nil {
				log.Fields("ack_error", err).Error(context.Background(), fmt.Sprintf("brokerHandlerErr: Ack error | %v", event.Error()))
				return err
			}

			log.Error(context.Background(), fmt.Sprintf("brokerHandlerErr: %v", event.Error()))

			return nil
		}),
	)

	if err := b.Init(); err != nil {
		t.Fatal(err)
	}

	if err := b.Connect(ctx); err != nil {
		t.Fatal(err)
	}

	s := server.NewServer(
		server.Broker(b),
		server.Codec("application/octet-stream", codec.NewCodec()),
		server.Hooks(
			server.NewLoggerHookSubHandler(metadata.HeaderEndpoint),
			server.HookSubHandler(rh.ServerSubscriber),
		),
	)
	if err := s.Init(); err != nil {
		t.Fatal(err)
	}

	c := client.NewClient(
		client.Broker(b),
		client.Codec("application/octet-stream", codec.NewCodec()),
		client.ContentType("application/octet-stream"),
	)
	if err := c.Init(); err != nil {
		t.Fatal(err)
	}
	h := &TestHandler{t: t}

	if err := s.Subscribe(s.NewSubscriber(topicTarget, h.SingleSubHandler,
		server.SubscriberQueue("queue"),
	)); err != nil {
		t.Fatal(err)
	}

	if err := s.Start(); err != nil {
		t.Fatal(err)
	}

	msgs := make([]client.Message, 0, 8)
	for i := 0; i < 8; i++ {
		req := &codec.Frame{Data: []byte(fmt.Sprintf(`{"name": "test_name %d"}`, i))}

		opts := []client.MessageOption{
			client.MessageMetadata(metadata.HeaderXRequestID, uuid.NewString()),
			client.MessageMetadata(metadata.HeaderEndpoint, "test_endpoint"),
			client.MessageMetadata(metadata.HeaderService, "test_service"),
		}

		msgs = append(msgs, c.NewMessage(topicTarget, req, opts...))
	}

	if err := c.BatchPublish(ctx, msgs); err != nil {
		t.Fatal(err)
	}

	msv := micro.NewService(
		micro.Server(s),
		micro.Client(c),
		micro.Broker(b),
		micro.Context(ctx),
		micro.Name("test_server"),
		micro.Version("latest"))

	if err := msv.Run(); err != nil {
		t.Fatal(err)
	}
}