package flow

import (
	"context"
	"testing"
	"time"

	httpcli "github.com/unistack-org/micro-client-http/v3"
	jsonpbcodec "github.com/unistack-org/micro-codec-jsonpb/v3"
	httpsrv "github.com/unistack-org/micro-server-http/v3"
	pb "github.com/unistack-org/micro-tests/flow/proto"
	"github.com/unistack-org/micro/v3"
	"github.com/unistack-org/micro/v3/client"
	"github.com/unistack-org/micro/v3/flow"
	"github.com/unistack-org/micro/v3/logger"
	"github.com/unistack-org/micro/v3/meter"
	"github.com/unistack-org/micro/v3/server"
	"github.com/unistack-org/micro/v3/store"
	"github.com/unistack-org/micro/v3/tracer"
)

type handler struct{}

func (h *handler) LookupUser(ctx context.Context, req *pb.LookupUserReq, rsp *pb.LookupUserRsp) error {
	return nil
}

func TestFlow(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	logger.DefaultLogger = logger.NewLogger(logger.WithLevel(logger.TraceLevel))

	s := store.DefaultStore
	c := client.NewClientCallOptions(
		httpcli.NewClient(
			client.ContentType("application/json"),
			client.Codec("application/json", jsonpbcodec.NewCodec()),
		),
		client.WithAddress("http://127.0.0.1:7989"),
	)
	m := meter.DefaultMeter
	tr := tracer.DefaultTracer
	l := logger.DefaultLogger

	f := flow.NewFlow(flow.Context(ctx), flow.Store(s), flow.Client(c), flow.Meter(m), flow.Tracer(tr), flow.Logger(l))

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

	options := append([]micro.Option{},
		micro.Server(
			httpsrv.NewServer(
				server.Codec("application/json", jsonpbcodec.NewCodec()),
				server.Address("127.0.0.1:7989"),
			),
		),
		micro.Context(ctx),
	)

	svc := micro.NewService(options...)

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

	h := &handler{}

	if err := pb.RegisterTestServiceServer(svc.Server(), h); err != nil {
		t.Fatal(err)
	}

	go func() {
		if err := svc.Run(); err != nil {
			t.Fatal(err)
		}
	}()

	time.Sleep(2 * time.Second)
	steps := []flow.Step{
		flow.NewCallStep("test", pb.TestServiceName, "LookupUser", flow.StepID("test.TestService.LookupUser")),
		flow.NewCallStep("test", pb.TestServiceName, "UpdateUser", flow.StepRequires("test.TestService.LookupUser")),
		flow.NewCallStep("test", pb.TestServiceName, "RemoveUser", flow.StepRequires("test.TestService.UpdateUser")),
		flow.NewCallStep("test", pb.TestServiceName, "MailUser", flow.StepRequires("test.TestService.UpdateUser")),
	}
	w, err := f.WorkflowCreate(ctx, "test", steps...)
	if err != nil {
		t.Fatal(err)
	}

	req := &pb.LookupUserReq{Name: "vtolstov"}
	id, err := w.Execute(ctx, req, flow.ExecuteTimeout(2*time.Second))
	if err != nil {
		t.Fatal(err)
	}

	t.Logf("execution id: %s", id)
}