/**
 * Status state machine for managing indexing status transitions
 */
import type { IndexingStatus } from '../types/models.js';
import type { StatusChangeEvent } from './types.js';
/**
 * Status state machine
 */
export declare class StatusStateMachine {
    private currentStatus;
    private history;
    private listeners;
    constructor(initialStatus?: IndexingStatus);
    /**
     * Get current status
     */
    getStatus(): IndexingStatus;
    /**
     * Transition to a new status
     */
    transition(newStatus: IndexingStatus, reason?: string): boolean;
    /**
     * Set to standby status
     */
    setStandby(reason?: string): boolean;
    /**
     * Set to indexing status
     */
    setIndexing(reason?: string): boolean;
    /**
     * Set to indexed status
     */
    setIndexed(reason?: string): boolean;
    /**
     * Set to error status
     */
    setError(reason?: string): boolean;
    /**
     * Check if in specific status
     */
    is(status: IndexingStatus): boolean;
    /**
     * Check if indexing is active
     */
    isActive(): boolean;
    /**
     * Check if has error
     */
    hasError(): boolean;
    /**
     * Get status history
     */
    getHistory(): StatusChangeEvent[];
    /**
     * Get last status change
     */
    getLastChange(): StatusChangeEvent | null;
    /**
     * Add status change listener
     */
    addListener(listener: (event: StatusChangeEvent) => void): void;
    /**
     * Remove status change listener
     */
    removeListener(listener: (event: StatusChangeEvent) => void): void;
    /**
     * Notify all listeners
     */
    private notifyListeners;
    /**
     * Clear history
     */
    clearHistory(): void;
    /**
     * Reset to initial state
     */
    reset(): void;
}
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