import { HandwritingTimerOptions, WritingSession, WritingSpeedStats } from './utils';
/**
 * HandwritingTimer class for tracking writing sessions
 */
export declare class HandwritingTimer {
    private startTime;
    private elapsedTime;
    private isRunning;
    private intervalId;
    private sessionHistory;
    private currentSession;
    private onTickCallback;
    private tickInterval;
    /**
     * Create a new HandwritingTimer instance
     *
     * @param options - Configuration options
     */
    constructor(options?: HandwritingTimerOptions);
    /**
     * Start the timer
     */
    start(): void;
    /**
     * Pause the timer
     */
    pause(): void;
    /**
     * Stop the timer and reset
     */
    stop(): void;
    /**
     * Reset the timer without saving the session
     */
    reset(): void;
    /**
     * Take a snapshot of the current text
     *
     * @param text - The current text
     */
    takeTextSnapshot(text: string): void;
    /**
     * Calculate writing speed based on the latest text snapshot
     *
     * @returns Writing speed statistics
     */
    calculateWritingSpeed(): WritingSpeedStats;
    /**
     * Get words per minute (WPM) from the latest calculation
     *
     * @returns The words per minute or 0 if no data available
     */
    get wpm(): number;
    /**
     * Get total words written from the latest calculation
     *
     * @returns The total words or 0 if no data available
     */
    get words(): number;
    /**
     * Get session history
     *
     * @returns Array of writing sessions
     */
    getSessionHistory(): WritingSession[];
    /**
     * Get current elapsed time in milliseconds
     *
     * @returns Elapsed time in milliseconds
     */
    getElapsedTime(): number;
    /**
     * Get formatted time display (HH:MM:SS)
     *
     * @returns Formatted time string
     */
    getFormattedTime(): string;
    /**
     * Check if timer is currently running
     *
     * @returns True if timer is running
     */
    isTimerRunning(): boolean;
    /**
     * Set callback for timer tick events
     *
     * @param callback - Function to call on each tick
     */
    onTick(callback: (elapsedTime: number) => void): void;
    /**
     * Format time in milliseconds to HH:MM:SS
     *
     * @param ms - Time in milliseconds
     * @returns Formatted time string
     */
    private formatTime;
    /**
     * Start the timer interval
     */
    private startInterval;
    /**
     * Clear the timer interval
     */
    private clearInterval;
}