package processor

import (
	"context"
	"testing"

	"apskel-pos-be/internal/models"

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

// Mock repositories for testing
type MockProductRepository struct {
	mock.Mock
}

type MockCategoryRepository struct {
	mock.Mock
}

type MockProductVariantRepository struct {
	mock.Mock
}

type MockInventoryRepository struct {
	mock.Mock
}

type MockOutletRepository struct {
	mock.Mock
}

// Test helper functions
func TestCreateProductWithInventory(t *testing.T) {
	// This is a basic test structure - in a real implementation,
	// you would use a proper testing framework with database mocks

	t.Run("should create product with inventory when create_inventory is true", func(t *testing.T) {
		// Arrange
		productRepo := &MockProductRepository{}
		categoryRepo := &MockCategoryRepository{}
		productVariantRepo := &MockProductVariantRepository{}
		inventoryRepo := &MockInventoryRepository{}
		outletRepo := &MockOutletRepository{}

		processor := NewProductProcessorImpl(
			productRepo,
			categoryRepo,
			productVariantRepo,
			inventoryRepo,
			outletRepo,
		)

		req := &models.CreateProductRequest{
			OrganizationID:  uuid.New(),
			CategoryID:      uuid.New(),
			Name:            "Test Product",
			Price:           10.0,
			Cost:            5.0,
			InitialStock:    &[]int{100}[0],
			ReorderLevel:    &[]int{20}[0],
			CreateInventory: true,
		}

		// Mock expectations
		categoryRepo.On("GetByID", mock.Anything, req.CategoryID).Return(&models.Category{}, nil)
		productRepo.On("ExistsBySKU", mock.Anything, req.OrganizationID, mock.Anything, mock.Anything).Return(false, nil)
		productRepo.On("ExistsByName", mock.Anything, req.OrganizationID, req.Name, mock.Anything).Return(false, nil)
		productRepo.On("Create", mock.Anything, mock.Anything).Return(nil)
		productRepo.On("GetWithCategory", mock.Anything, mock.Anything).Return(&models.Product{}, nil)

		// Mock outlets
		outlets := []*models.Outlet{
			{ID: uuid.New()},
			{ID: uuid.New()},
		}
		outletRepo.On("GetByOrganizationID", mock.Anything, req.OrganizationID).Return(outlets, nil)

		// Mock inventory creation
		inventoryRepo.On("BulkCreate", mock.Anything, mock.Anything).Return(nil)

		// Act
		result, err := processor.CreateProduct(context.Background(), req)

		// Assert
		assert.NoError(t, err)
		assert.NotNil(t, result)

		// Verify that inventory was created
		inventoryRepo.AssertCalled(t, "BulkCreate", mock.Anything, mock.Anything)
		outletRepo.AssertCalled(t, "GetByOrganizationID", mock.Anything, req.OrganizationID)
	})

	t.Run("should not create inventory when create_inventory is false", func(t *testing.T) {
		// Arrange
		productRepo := &MockProductRepository{}
		categoryRepo := &MockCategoryRepository{}
		productVariantRepo := &MockProductVariantRepository{}
		inventoryRepo := &MockInventoryRepository{}
		outletRepo := &MockOutletRepository{}

		processor := NewProductProcessorImpl(
			productRepo,
			categoryRepo,
			productVariantRepo,
			inventoryRepo,
			outletRepo,
		)

		req := &models.CreateProductRequest{
			OrganizationID:  uuid.New(),
			CategoryID:      uuid.New(),
			Name:            "Test Product",
			Price:           10.0,
			Cost:            5.0,
			CreateInventory: false,
		}

		// Mock expectations
		categoryRepo.On("GetByID", mock.Anything, req.CategoryID).Return(&models.Category{}, nil)
		productRepo.On("ExistsBySKU", mock.Anything, req.OrganizationID, mock.Anything, mock.Anything).Return(false, nil)
		productRepo.On("ExistsByName", mock.Anything, req.OrganizationID, req.Name, mock.Anything).Return(false, nil)
		productRepo.On("Create", mock.Anything, mock.Anything).Return(nil)
		productRepo.On("GetWithCategory", mock.Anything, mock.Anything).Return(&models.Product{}, nil)

		// Act
		result, err := processor.CreateProduct(context.Background(), req)

		// Assert
		assert.NoError(t, err)
		assert.NotNil(t, result)

		// Verify that inventory was NOT created
		inventoryRepo.AssertNotCalled(t, "BulkCreate", mock.Anything, mock.Anything)
		outletRepo.AssertNotCalled(t, "GetByOrganizationID", mock.Anything, mock.Anything)
	})
}

// Mock implementations (simplified for testing)
func (m *MockProductRepository) Create(ctx context.Context, product *models.Product) error {
	args := m.Called(ctx, product)
	return args.Error(0)
}

func (m *MockProductRepository) GetByID(ctx context.Context, id uuid.UUID) (*models.Product, error) {
	args := m.Called(ctx, id)
	return args.Get(0).(*models.Product), args.Error(1)
}

func (m *MockProductRepository) GetWithCategory(ctx context.Context, id uuid.UUID) (*models.Product, error) {
	args := m.Called(ctx, id)
	return args.Get(0).(*models.Product), args.Error(1)
}

func (m *MockProductRepository) ExistsBySKU(ctx context.Context, organizationID uuid.UUID, sku string, excludeID *uuid.UUID) (bool, error) {
	args := m.Called(ctx, organizationID, sku, excludeID)
	return args.Bool(0), args.Error(1)
}

func (m *MockProductRepository) ExistsByName(ctx context.Context, organizationID uuid.UUID, name string, excludeID *uuid.UUID) (bool, error) {
	args := m.Called(ctx, organizationID, name, excludeID)
	return args.Bool(0), args.Error(1)
}

func (m *MockCategoryRepository) GetByID(ctx context.Context, id uuid.UUID) (*models.Category, error) {
	args := m.Called(ctx, id)
	return args.Get(0).(*models.Category), args.Error(1)
}

func (m *MockInventoryRepository) BulkCreate(ctx context.Context, inventoryItems []*models.Inventory) error {
	args := m.Called(ctx, inventoryItems)
	return args.Error(0)
}

func (m *MockOutletRepository) GetByOrganizationID(ctx context.Context, organizationID uuid.UUID) ([]*models.Outlet, error) {
	args := m.Called(ctx, organizationID)
	return args.Get(0).([]*models.Outlet), args.Error(1)
}
