import { Category } from "../models/Category";
import { CategoryRepository } from "../repositories/CategoryRepository";
/**
 * DTO for category creation
 */
export interface CreateCategoryDTO {
    teacherId: string;
    name: string;
    description?: string;
    displayOrder?: number;
}
/**
 * DTO for category update
 */
export interface UpdateCategoryDTO {
    name?: string;
    description?: string;
    displayOrder?: number;
}
/**
 * Service class for handling category-related business logic
 */
export declare class CategoryService {
    private categoryRepository;
    constructor(categoryRepository: CategoryRepository);
    /**
     * Create a new category
     */
    createCategory(categoryData: CreateCategoryDTO): Promise<Category>;
    /**
     * Get all categories for a teacher
     */
    getCategoriesByTeacherId(teacherId: string): Promise<Category[]>;
    /**
     * Get all categories with pagination
     */
    getAllCategories(page?: number, limit?: number): Promise<Category[]>;
    /**
     * Get a category by ID
     */
    getCategoryById(id: string): Promise<Category | null>;
    /**
     * Update a category
     */
    updateCategory(id: string, data: UpdateCategoryDTO): Promise<Category | null>;
    /**
     * Delete a category
     */
    deleteCategory(id: string): Promise<boolean>;
    /**
     * Get total count of categories
     */
    getTotalCategoryCount(): Promise<number>;
}