package lkgateway

import (
	"context"
	"path/filepath"
	"sync/atomic"
	"testing"
	"time"

	"git.zetit.ru/zuevav/Bridge-and-Join-s/internal/m2m"
	"git.zetit.ru/zuevav/Bridge-and-Join-s/internal/m2mcore"
	"git.zetit.ru/zuevav/Bridge-and-Join-s/internal/nsdadapter/igw"
)

type flakySender struct{ fail bool }

func (f *flakySender) Send(_ context.Context, _ *m2m.M2MTransferRequest) (*m2m.M2MTransferResponse, error) {
	if f.fail {
		return nil, &igw.NotDeliveredError{PackageID: "187", Code: "ERRORXML_UPLOAD_FAILED"}
	}
	return nil, nil
}

func (f *flakySender) SendDecision(_ context.Context, _ *m2m.M2MTransferDecision) error { return nil }

// НРД не принял пакет: заявка остаётся «Не отправлена», BJ_SENT не пишется; повтор — тот же GUID.
func TestSendFailureAndResend(t *testing.T) {
	old := sendFailFile
	sendFailFile = filepath.Join(t.TempDir(), "sf.json")
	sendFails.loaded = false
	defer func() { sendFailFile, sendFails.loaded = old, false }()
	oldHook, oldQ := sentHook, quikSendHook
	defer func() { sentHook, quikSendHook = oldHook, oldQ }()
	quikSendHook = nil
	var sent atomic.Int32
	sentHook = func(*m2m.M2MTransferRequest) { sent.Add(1) }

	ctx := context.Background()
	snd := &flakySender{fail: true}
	svc := NewService(Config{Repository: m2mcore.NewMemoryRepository(), Sender: snd})
	req := sendFailRequest()
	if _, err := svc.SendBuiltRequest(ctx, req, "inv", nil); err == nil {
		t.Fatal("ожидалась ошибка доставки")
	}
	d, err := svc.Repo().GetByGUID(ctx, req.Header.GUID)
	if err != nil || d.State != m2mcore.StateValidated || d.Request == nil {
		t.Fatalf("заявка должна остаться «Не отправлена» с запросом: %+v %v", d, err)
	}
	if f := sendFailGet(string(req.Header.GUID)); f == nil || f.PackageID != "187" || sendFailText(f) == "" {
		t.Fatalf("неудача не записана: %+v", f)
	}
	if err := svc.ResendClaim(ctx, d.ID); err == nil {
		t.Fatal("НРД всё ещё недоступен — повтор тоже должен вернуть ошибку")
	}
	if f := sendFailGet(string(req.Header.GUID)); f == nil || f.Attempts != 2 {
		t.Fatalf("вторая попытка не учтена: %+v", f)
	}
	snd.fail = false
	if err := svc.ResendClaim(ctx, d.ID); err != nil {
		t.Fatal(err)
	}
	d2, _ := svc.Repo().GetByID(ctx, d.ID)
	if d2.ID != d.ID || d2.State != m2mcore.StateAwaitingDecision || sendFailGet(string(req.Header.GUID)) != nil {
		t.Fatalf("после повтора: %s %s", d2.ID, d2.State)
	}
	for i := 0; i < 100 && sent.Load() == 0; i++ {
		waitShort()
	}
	if sent.Load() != 1 {
		t.Fatalf("BJ_SENT должен уйти один раз — после доставки, было %d", sent.Load())
	}
}

func sendFailRequest() *m2m.M2MTransferRequest {
	whole := uint64(100)
	isin := m2m.ISIN("RU0007661625")
	return &m2m.M2MTransferRequest{
		Header: m2m.RequestHeader{
			GUID:         m2m.UUID("c02a1d5e-c2af-4799-bab4-953f133c5133"),
			SenderCode:   "MC0079200000",
			ReceiverCode: "MC0010300000",
			CostInfo:     m2m.CostInfo{No: &m2m.CostInfoNo{}},
		},
		Data: m2m.RequestData{
			InvestorInformation: m2m.InvestorInformation{
				LastName:  "Иванов",
				FirstName: "Иван",
				IdentityDocument: m2m.IdentityDocument{
					DocumentType:   m2m.DocCode21,
					DocumentNumber: m2m.IdentityDocSerial("654321"),
				},
			},
			TransferringDepository: m2m.SettlementRequisites{INN: "7702070139"},
			ReceivingDepository:    m2m.SettlementRequisites{INN: "7802031669"},
			TransferredSecurities: m2m.RequestTransferredSecurities{
				Securities: []m2m.RequestSecurity{
					{
						ReferenceID:     "M2M2026030200001",
						SecurityCode:    "MM0766162534",
						SecurityDetails: m2m.SecurityDetails{ISIN: &isin},
						Quantity:        m2m.Quantity{Whole: &whole},
						SettlementAccount: []m2m.RequestSettlementAccount{
							{
								SettlementRequisites: m2m.SettlementRequisites{INN: "7702070139"},
								SettlementLocation: m2m.SettlementDepositoryLocation{
									DeponentCode: "DP789456",
									AccountID:    "31MC0021900000F01",
									SectionID:    "P001",
								},
							},
						},
						IsolationStatus: m2m.IsolationSGDN,
					},
				},
			},
		},
	}
}

func waitShort() { time.Sleep(10 * time.Millisecond) }