package m2mcore_test

import (
	"context"
	"errors"
	"testing"
	"time"

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

// fakeStore — тестовая реализация FansyStore.
type fakeStore struct {
	client   *m2mcore.Client
	accounts []m2mcore.DepoAccount
	getErr   error
}

func (f *fakeStore) GetClientByID(_ context.Context, _ string) (*m2mcore.Client, error) {
	if f.getErr != nil {
		return nil, f.getErr
	}
	return f.client, nil
}

func (f *fakeStore) GetDepoAccounts(_ context.Context, _ string, _ m2m.OrganizationINN) ([]m2mcore.DepoAccount, error) {
	return f.accounts, nil
}

func (f *fakeStore) GetBalances(_ context.Context, _ string, _ []m2m.SecurityCode) ([]m2mcore.SecurityBalance, error) {
	return nil, nil
}

func TestNewReferenceIDFormat(t *testing.T) {
	at := time.Date(2026, 3, 2, 14, 30, 0, 0, time.UTC)
	id, err := m2mcore.NewReferenceID(at)
	if err != nil {
		t.Fatal(err)
	}
	if string(id)[:11] != "M2M20260302" {
		t.Errorf("префикс/дата ReferenceID неверен: %q", id)
	}
}

func TestEnrichRequestHappyPath(t *testing.T) {
	store := &fakeStore{
		client: &m2mcore.Client{
			ID:         "inv-1",
			LastName:   "Иванов",
			FirstName:  "Иван",
			MiddleName: "Иванович",
			Document: m2mcore.ClientDocument{
				DocumentType: m2m.DocCode21,
				Series:       "4512",
				Number:       "654321",
			},
		},
		accounts: []m2mcore.DepoAccount{
			{
				ID:            "acc-1",
				ClientID:      "inv-1",
				DeponentCode:  "DP789456",
				AccountID:     m2m.AccountID("31MC0021900000F01"),
				SectionID:     "P001",
				DepositoryINN: m2m.OrganizationINN("7702070139"),
			},
		},
	}
	whole := uint64(1500)
	isin := m2m.ISIN("RU0007661625")

	claim := m2mcore.ClaimInput{
		InvestorClientID:          "inv-1",
		TransferringDepositoryINN: m2m.OrganizationINN("0702345678"),
		ReceivingDepositoryINN:    m2m.OrganizationINN("0710987654"),
		CostInfo: m2m.CostInfo{
			No: &m2m.CostInfoNo{},
		},
		Securities: []m2mcore.ClaimSecurityInput{
			{
				SecurityCode: m2m.SecurityCode("MM0766162534"),
				Details:      m2m.SecurityDetails{ISIN: &isin},
				Quantity:     m2m.Quantity{Whole: &whole},
			},
		},
	}
	codes := m2mcore.SenderReceiver{
		SenderCode:   m2m.DeponentCode("MC0079200000"),
		ReceiverCode: m2m.DeponentCode("MC0010300000"),
	}

	req, err := m2mcore.EnrichRequest(context.Background(), store, claim, codes)
	if err != nil {
		t.Fatalf("EnrichRequest: %v", err)
	}
	if err := req.Validate(); err != nil {
		t.Fatalf("собранный Request не прошёл валидацию: %v", err)
	}
	if req.Data.InvestorInformation.LastName != "Иванов" {
		t.Errorf("LastName не пробросился")
	}
	if len(req.Data.TransferredSecurities.Securities) != 1 {
		t.Errorf("ожидалась 1 ЦБ, получено %d", len(req.Data.TransferredSecurities.Securities))
	}
}

func TestEnrichRequestNoAccounts(t *testing.T) {
	store := &fakeStore{
		client:   &m2mcore.Client{LastName: "X", FirstName: "Y", Document: m2mcore.ClientDocument{DocumentType: m2m.DocCode21, Number: "1"}},
		accounts: nil,
	}
	_, err := m2mcore.EnrichRequest(context.Background(), store, m2mcore.ClaimInput{}, m2mcore.SenderReceiver{})
	if err == nil {
		t.Errorf("ожидалась ошибка при отсутствии счетов")
	}
}

func TestEnrichRequestStoreError(t *testing.T) {
	store := &fakeStore{getErr: errors.New("db down")}
	_, err := m2mcore.EnrichRequest(context.Background(), store, m2mcore.ClaimInput{}, m2mcore.SenderReceiver{})
	if err == nil {
		t.Errorf("ожидалась ошибка от FansyStore")
	}
}

func TestNoopPortsReturnErrNotImplemented(t *testing.T) {
	ctx := context.Background()
	if _, err := (m2mcore.NoopNSDSender{}).Send(ctx, nil); !errors.Is(err, m2mcore.ErrNotImplemented) {
		t.Errorf("NoopNSDSender.Send ожидалась ErrNotImplemented, получено %v", err)
	}
	if err := (m2mcore.NoopNSDSender{}).SendDecision(ctx, nil); !errors.Is(err, m2mcore.ErrNotImplemented) {
		t.Errorf("NoopNSDSender.SendDecision ожидалась ErrNotImplemented, получено %v", err)
	}
	if err := (m2mcore.NoopLKCallbackClient{}).UpdateStatus(ctx, "", "", ""); !errors.Is(err, m2mcore.ErrNotImplemented) {
		t.Errorf("LKCallbackClient ожидалась ErrNotImplemented")
	}
	if _, err := (m2mcore.NoopCryptoVerifier{}).VerifyXMLDSig(ctx, nil); !errors.Is(err, m2mcore.ErrNotImplemented) {
		t.Errorf("CryptoVerifier ожидалась ErrNotImplemented")
	}
	if _, err := (m2mcore.NoopFansyStore{}).GetClientByID(ctx, ""); !errors.Is(err, m2mcore.ErrNotImplemented) {
		t.Errorf("FansyStore.GetClientByID ожидалась ErrNotImplemented")
	}
	if _, err := (m2mcore.NoopFansyStore{}).GetDepoAccounts(ctx, "", ""); !errors.Is(err, m2mcore.ErrNotImplemented) {
		t.Errorf("FansyStore.GetDepoAccounts ожидалась ErrNotImplemented")
	}
	if _, err := (m2mcore.NoopFansyStore{}).GetBalances(ctx, "", nil); !errors.Is(err, m2mcore.ErrNotImplemented) {
		t.Errorf("FansyStore.GetBalances ожидалась ErrNotImplemented")
	}
}