import { EventEmitter } from 'events';
export interface ProgressState {
    sessionId: string;
    totalDocuments: number;
    processedDocuments: number;
    successfulExports: number;
    failedExports: number;
    currentDocument?: string;
    currentFolder?: string;
    currentOperation?: string;
    currentFormat?: string;
    currentFormats?: string[];
    formatProgress?: FormatProgress;
    startTime: Date;
    lastUpdateTime: Date;
    estimatedTimeRemaining?: number;
    processingRate?: number;
    exportSpeed?: number;
    totalBytesProcessed?: number;
}
export interface FormatProgress {
    totalFormats: number;
    completedFormats: number;
    currentFormatIndex: number;
    formatResults: {
        [format: string]: 'pending' | 'processing' | 'success' | 'failed';
    };
}
export interface ProgressUpdate {
    type: 'start' | 'progress' | 'complete' | 'error' | 'folder_change' | 'format_start' | 'format_complete' | 'format_error';
    documentId?: string;
    documentTitle?: string;
    folderName?: string;
    operation?: string;
    format?: string;
    formats?: string[];
    formatProgress?: FormatProgress;
    error?: Error;
    timestamp: Date;
    fileSize?: number;
}
export declare class ProgressTracker extends EventEmitter {
    private state;
    private startTime;
    constructor(sessionId: string, totalDocuments: number);
    getState(): ProgressState;
    startDocument(documentId: string, documentTitle: string, folderName?: string, formats?: string[]): void;
    updateFolder(folderName: string): void;
    updateOperation(operation: string): void;
    startFormat(format: string): void;
    completeFormat(format: string, success: boolean, error?: Error): void;
    completeDocument(success: boolean, fileSize?: number, error?: Error): void;
    getProgressPercentage(): number;
    getElapsedTime(): number;
    getFormattedElapsedTime(): string;
    getEstimatedTimeRemaining(): string | undefined;
    getProcessingRate(): number | undefined;
    getExportSpeed(): number | undefined;
    getFormattedExportSpeed(): string | undefined;
    getTotalBytesProcessed(): number;
    getFormattedTotalBytes(): string;
    private updateProcessingRate;
    private updateExportSpeed;
    private updateEstimatedTimeRemaining;
    private formatDuration;
    private formatBytes;
    getSummary(): string;
}
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