import { Lecture } from "../models/Lecture";
import { LectureRepository } from "../repositories/LectureRepository";
export interface CreateLectureDTO {
    sectionId: string;
    title: string;
    content: string;
    type: "text" | "h5p" | "presentation";
    orderIndex?: number;
}
export interface UpdateLectureDTO {
    title?: string;
    content?: string;
    type?: "text" | "h5p" | "presentation";
    orderIndex?: number;
}
export declare class LectureService {
    private lectureRepository;
    constructor(lectureRepository: LectureRepository);
    /**
     * Create a new lecture
     */
    createLecture(data: CreateLectureDTO): Promise<Lecture>;
    /**
     * Get a lecture by ID
     */
    getLecture(id: string): Promise<Lecture | null>;
    /**
     * Get all lectures for a section
     */
    getLecturesBySectionId(sectionId: string): Promise<Lecture[]>;
    /**
     * Update a lecture
     */
    updateLecture(id: string, data: UpdateLectureDTO): Promise<Lecture | null>;
    /**
     * Delete a lecture
     */
    deleteLecture(id: string): Promise<boolean>;
}