import { Course } from "../models/Course";
import { CourseRepository } from "../repositories/CourseRepository";
import { SectionRepository } from "../repositories/SectionRepository";
import { LectureRepository } from "../repositories/LectureRepository";
import { QuizRepository } from "../repositories/QuizRepository";
import { QuizQuestionRepository } from "../repositories/QuizQuestionRepository";
import { CategoryRepository } from "../repositories/CategoryRepository";
import { Section } from "../models/Section";
import { Lecture } from "../models/Lecture";
import { Quiz } from "../models/Quiz";
import { QuizQuestion } from "../models/QuizQuestion";
import { EnrollmentRepository } from "../repositories/EnrollmentRepository";
import { DatabaseAdapter } from "../database/DatabaseAdapter";
export type CourseLevel = "beginner" | "intermediate" | "advanced";
/**
 * DTO for course creation
 */
export interface CreateCourseDTO {
    teacherId: string;
    title: string;
    description?: string;
    thumbnail?: string;
    level: CourseLevel;
    visibility?: "private" | "public";
    categories?: string[];
}
export interface UpdateQuizQuestionDTO {
    id?: string;
    question: string;
    options: string[];
    correctAnswer: string;
    explanation?: string;
}
export interface UpdateQuizDTO {
    id?: string;
    title: string;
    description?: string;
    questions: UpdateQuizQuestionDTO[];
}
export interface UpdateLectureDTO {
    id?: string;
    title: string;
    content: string;
    type: "text" | "video" | "h5p";
    orderIndex: number;
}
export interface UpdateSectionDTO {
    id?: string;
    title: string;
    description?: string;
    orderIndex: number;
    lectures: UpdateLectureDTO[];
    quiz?: UpdateQuizDTO | null;
}
export interface UpdateCoursePayloadDTO {
    title: string;
    description?: string;
    thumbnail?: string;
    level: "beginner" | "intermediate" | "advanced";
    visibility: "private" | "public";
    categories?: string[];
    sections: UpdateSectionDTO[];
}
/**
 * DTO for course listing with section counts
 * Re-defined properties instead of extending Course to fix type mismatch
 */
export interface CourseWithDetails {
    id: string;
    teacherId: string;
    title: string;
    description: string;
    thumbnail: string;
    level: CourseLevel;
    visibility: "private" | "public";
    categories: string[];
    createdAt: Date;
    updatedAt?: Date;
    sectionCount: number;
    lectureCount: number;
    categoryNames?: string[];
}
/**
 * DTO for detailed course with sections and lectures
 * Re-defined properties instead of extending Course to fix type mismatch
 */
export interface CourseDetail {
    id: string;
    teacherId: string;
    title: string;
    description: string;
    thumbnail: string;
    level: CourseLevel;
    visibility: "private" | "public";
    categories: string[];
    createdAt: Date;
    updatedAt?: Date;
    sections: (Omit<Section, "courseId" | "createdAt" | "updatedAt"> & {
        lectures: Lecture[];
        quiz?: Quiz & {
            questions: QuizQuestion[];
        };
    })[];
    categoryNames?: string[];
}
export interface CourseDetails {
    course: Course;
    sections: Section[];
    lectures: Lecture[];
    totalLectures: number;
}
/**
 * Service class for handling course-related business logic
 */
export declare class CourseService {
    private courseRepository;
    private sectionRepository;
    private lectureRepository;
    private quizRepository;
    private quizQuestionRepository;
    private categoryRepository;
    private enrollmentRepository;
    private dbAdapter;
    constructor(courseRepository: CourseRepository, sectionRepository: SectionRepository, lectureRepository: LectureRepository, quizRepository: QuizRepository, quizQuestionRepository: QuizQuestionRepository, categoryRepository: CategoryRepository, enrollmentRepository: EnrollmentRepository, dbAdapter: DatabaseAdapter);
    /**
     * Create a new course
     */
    createCourse(courseData: CreateCourseDTO): Promise<Course>;
    private parseCategories;
    /**
     * Create content for a course
     */
    createContent(courseId: string, contentData: any): Promise<any>;
    /**
     * Get all courses for a teacher
     */
    getCoursesByTeacherId(teacherId: string): Promise<CourseWithDetails[]>;
    /**
     * Get a course by ID with all sections, lectures, and quizzes
     */
    getCourseDetail(courseId: string): Promise<CourseDetail | null>;
    /**
     * Update a course
     */
    updateCourse(courseId: string, data: UpdateCoursePayloadDTO): Promise<CourseDetail | null>;
    private updateLecturesForSection;
    private updateQuizForSection;
    private updateQuestionsForQuiz;
    /**
     * Delete a course
     */
    deleteCourse(courseId: string): Promise<boolean>;
    /**
     * Get public courses
     */
    getPublicCourses(): Promise<CourseWithDetails[]>;
    /**
     * Get courses by teacher ID
     */
    getCoursesByTeacher(teacherId: string): Promise<CourseWithDetails[]>;
    /**
     * Get courses by category
     */
    getCoursesByCategory(categoryId: string): Promise<CourseWithDetails[]>;
    /**
     * Fetch a course with all its sections and lectures
     */
    getCourseDetails(courseId: string): Promise<CourseDetails | null>;
    /**
     * Fetch all enrolled courses for a student with progress information
     */
    getEnrolledCoursesWithProgress(studentId: string): Promise<any[]>;
    /**
     * Mark a lecture as completed and update course progress
     */
    markLectureCompleted(studentId: string, courseId: string, lectureId: string): Promise<{
        success: boolean;
        progress: number;
        isCompleted: boolean;
    }>;
    /**
     * Get the total number of lectures in a course
     */
    getTotalLectureCount(courseId: string): Promise<{
        totalLectures: number;
    }>;
}