package service

import (
	"baron-sso-backend/internal/domain"
	"context"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/mock"
)

// --- Local Mocks to avoid collisions ---

type MockTenantRepoForSvc struct {
	mock.Mock
}

func (m *MockTenantRepoForSvc) Create(ctx context.Context, tenant *domain.Tenant) error {
	return m.Called(ctx, tenant).Error(0)
}

func (m *MockTenantRepoForSvc) Update(ctx context.Context, tenant *domain.Tenant) error {
	return m.Called(ctx, tenant).Error(0)
}

func (m *MockTenantRepoForSvc) FindByID(ctx context.Context, id string) (*domain.Tenant, error) {
	args := m.Called(ctx, id)
	if args.Get(0) == nil {
		return nil, args.Error(1)
	}
	return args.Get(0).(*domain.Tenant), args.Error(1)
}

func (m *MockTenantRepoForSvc) FindBySlug(ctx context.Context, slug string) (*domain.Tenant, error) {
	args := m.Called(ctx, slug)
	if args.Get(0) == nil {
		return nil, args.Error(1)
	}
	return args.Get(0).(*domain.Tenant), args.Error(1)
}

func (m *MockTenantRepoForSvc) FindByName(ctx context.Context, name string) (*domain.Tenant, error) {
	return nil, nil
}

func (m *MockTenantRepoForSvc) FindByDomain(ctx context.Context, domainName string) (*domain.Tenant, error) {
	args := m.Called(ctx, domainName)
	if args.Get(0) == nil {
		return nil, args.Error(1)
	}
	return args.Get(0).(*domain.Tenant), args.Error(1)
}

func (m *MockTenantRepoForSvc) FindByIDs(ctx context.Context, ids []string) ([]domain.Tenant, error) {
	return nil, nil
}

func (m *MockTenantRepoForSvc) AddDomain(ctx context.Context, tenantID string, domainName string, verified bool) error {
	return m.Called(ctx, tenantID, domainName, verified).Error(0)
}

type MockKetoSvcForTenant struct {
	mock.Mock
}

func (m *MockKetoSvcForTenant) CreateRelation(ctx context.Context, namespace, object, relation, subject string) error {
	return m.Called(ctx, namespace, object, relation, subject).Error(0)
}

func (m *MockKetoSvcForTenant) DeleteRelation(ctx context.Context, namespace, object, relation, subject string) error {
	return m.Called(ctx, namespace, object, relation, subject).Error(0)
}

func (m *MockKetoSvcForTenant) ListRelations(ctx context.Context, namespace, object, relation, subject string) ([]RelationTuple, error) {
	args := m.Called(ctx, namespace, object, relation, subject)
	return args.Get(0).([]RelationTuple), args.Error(1)
}

func (m *MockKetoSvcForTenant) ListObjects(ctx context.Context, namespace, relation, subject string) ([]string, error) {
	args := m.Called(ctx, namespace, relation, subject)
	return args.Get(0).([]string), args.Error(1)
}

func (m *MockKetoSvcForTenant) CheckPermission(ctx context.Context, namespace, object, relation, subject string) (bool, error) {
	args := m.Called(ctx, namespace, object, relation, subject)
	return args.Bool(0), args.Error(1)
}

type MockUserRepoForTenant struct {
	mock.Mock
}

func (m *MockUserRepoForTenant) Create(ctx context.Context, user *domain.User) error { return nil }
func (m *MockUserRepoForTenant) Update(ctx context.Context, user *domain.User) error { return nil }
func (m *MockUserRepoForTenant) FindByEmail(ctx context.Context, email string) (*domain.User, error) {
	args := m.Called(email)
	if args.Get(0) == nil {
		return nil, args.Error(1)
	}
	return args.Get(0).(*domain.User), args.Error(1)
}

func (m *MockUserRepoForTenant) FindByID(ctx context.Context, id string) (*domain.User, error) {
	return nil, nil
}

func (m *MockUserRepoForTenant) FindByIDs(ctx context.Context, ids []string) ([]domain.User, error) {
	return nil, nil
}

func (m *MockUserRepoForTenant) ListByTenant(ctx context.Context, tenantID string) ([]domain.User, error) {
	return nil, nil
}

func (m *MockUserRepoForTenant) List(ctx context.Context, offset, limit int, search string) ([]domain.User, int64, error) {
	return nil, 0, nil
}

// --- Tests ---

func TestTenantService_RegisterTenant_AutoVerify(t *testing.T) {
	mockRepo := new(MockTenantRepoForSvc)
	svc := NewTenantService(mockRepo, nil)

	ctx := context.Background()
	name := "New Tenant"
	slug := "new-tenant"
	domains := []string{"example.com"}

	// Use .Once() to ensure correct return values for sequential calls to FindBySlug
	mockRepo.On("FindBySlug", ctx, slug).Return(nil, nil).Once()
	mockRepo.On("Create", ctx, mock.Anything).Return(nil)
	mockRepo.On("AddDomain", ctx, mock.Anything, "example.com", true).Return(nil)
	mockRepo.On("FindBySlug", ctx, slug).Return(&domain.Tenant{ID: "t1", Slug: slug}, nil).Once()

	tenant, err := svc.RegisterTenant(ctx, name, slug, "", domains)
	assert.NoError(t, err)
	assert.NotNil(t, tenant)
	assert.Equal(t, "t1", tenant.ID)
	mockRepo.AssertExpectations(t)
}

func TestTenantService_RequestRegistration_NoVerify(t *testing.T) {
	mockRepo := new(MockTenantRepoForSvc)
	svc := NewTenantService(mockRepo, nil)

	ctx := context.Background()
	name := "Public Tenant"
	slug := "public-tenant"
	domainName := "public.com"
	adminEmail := "admin@public.com"

	mockRepo.On("Create", ctx, mock.MatchedBy(func(tenant *domain.Tenant) bool {
		return tenant.Status == domain.TenantStatusPending
	})).Return(nil)
	mockRepo.On("AddDomain", ctx, mock.Anything, domainName, false).Return(nil)

	tenant, err := svc.RequestRegistration(ctx, name, slug, "", domainName, adminEmail)
	assert.NoError(t, err)
	assert.NotNil(t, tenant)
	mockRepo.AssertExpectations(t)
}

func TestTenantService_ApproveTenant_SyncAdmin(t *testing.T) {
	mockRepo := new(MockTenantRepoForSvc)
	mockUserRepo := new(MockUserRepoForTenant)
	mockKeto := new(MockKetoSvcForTenant)

	svc := NewTenantService(mockRepo, mockUserRepo)
	svc.SetKetoService(mockKeto)

	ctx := context.Background()
	tenantID := "t1"
	adminEmail := "admin@tenant.com"
	userID := "user-uuid"

	tenant := &domain.Tenant{
		ID:     tenantID,
		Slug:   "tenant-slug",
		Config: domain.JSONMap{"adminEmail": adminEmail},
	}

	mockRepo.On("FindByID", ctx, tenantID).Return(tenant, nil)
	mockRepo.On("Update", ctx, mock.Anything).Return(nil)
	mockUserRepo.On("FindByEmail", adminEmail).Return(&domain.User{ID: userID, Email: adminEmail}, nil)
	mockKeto.On("CreateRelation", ctx, "Tenant", tenantID, "admin", "User:"+userID).Return(nil)

	err := svc.ApproveTenant(ctx, tenantID)
	assert.NoError(t, err)
	mockRepo.AssertExpectations(t)
	mockUserRepo.AssertExpectations(t)
	mockKeto.AssertExpectations(t)
}