/**
 * LMS Progress Tracking Service
 *
 * This module handles video progress tracking for Learning Management Systems.
 * Features:
 * - Resume playback from saved position
 * - Track watched percentage
 * - Milestone notifications (25%, 50%, 75%, 90%, 100%)
 * - Periodic progress saving
 * - Completion tracking
 */
import type { LMSProgressConfig, LMSProgressData, ProgressMilestone } from '../types';
/**
 * Manages LMS progress tracking for video playback
 */
export declare class LMSProgressManager {
    private config;
    private progressData;
    private saveTimer;
    private isDestroyed;
    private hasEmittedFirstPlay;
    private reachedMilestones;
    constructor(config: LMSProgressConfig);
    /**
     * Initialize progress tracking
     */
    initialize(duration: number): void;
    /**
     * Get resume position (for seeking on load)
     */
    getResumePosition(): number;
    /**
     * Check if should resume playback
     */
    shouldResume(): boolean;
    /**
     * Handle first play event
     */
    handleFirstPlay(): void;
    /**
     * Update progress with current playback time
     */
    updateProgress(currentTime: number, duration: number): void;
    /**
     * Handle video completion
     */
    handleCompletion(): void;
    /**
     * Check and emit milestone events
     */
    private checkMilestones;
    /**
     * Save current progress
     */
    saveProgress(): void;
    /**
     * Get current progress data (immutable copy)
     */
    getProgress(): LMSProgressData;
    /**
     * Reset progress (for rewatching)
     */
    reset(): void;
    /**
     * Destroy progress manager
     */
    destroy(): void;
}
/**
 * Save progress to localStorage
 */
export declare function saveProgressToStorage(progress: LMSProgressData): void;
/**
 * Load progress from localStorage
 */
export declare function loadProgressFromStorage(videoId: string): LMSProgressData | null;
/**
 * Clear progress from localStorage
 */
export declare function clearProgressFromStorage(videoId: string): void;
/**
 * Get all saved progress data
 */
export declare function getAllProgressFromStorage(): LMSProgressData[];
export interface ProgressAPIConfig {
    /** API endpoint for saving progress */
    saveEndpoint: string;
    /** API endpoint for loading progress */
    loadEndpoint: string;
    /** Authorization header */
    authToken?: string;
    /** Additional headers */
    headers?: Record<string, string>;
}
/**
 * Creates LMS progress callbacks that sync with a backend API
 */
export declare function createProgressAPICallbacks(apiConfig: ProgressAPIConfig): {
    onProgressSave: (progress: LMSProgressData) => Promise<void>;
    onMilestoneReached: (milestone: ProgressMilestone, progress: LMSProgressData) => Promise<void>;
    onComplete: (progress: LMSProgressData) => Promise<void>;
    loadProgress: (videoId: string, userId?: string) => Promise<Partial<LMSProgressData> | null>;
};