import 'reflect-metadata';
/**
 * Event handler type
 */
type EventHandler = (...args: unknown[]) => void | Promise<void>;
/**
 * Event Emitter
 *
 * Simple event bus for decoupled communication between modules
 */
export declare class EventEmitter {
    private static instance;
    private listeners;
    private constructor();
    static getInstance(): EventEmitter;
    /**
     * Register an event listener
     */
    on(event: string, handler: EventHandler): void;
    /**
     * Register a one-time event listener
     */
    once(event: string, handler: EventHandler): void;
    /**
     * Remove an event listener
     */
    off(event: string, handler: EventHandler): void;
    /**
     * Emit an event
     */
    emit(event: string, ...args: unknown[]): Promise<void>;
    /**
     * Emit an event synchronously
     */
    emitSync(event: string, ...args: unknown[]): void;
    /**
     * Remove all listeners for an event
     */
    removeAllListeners(event?: string): void;
    /**
     * Get listener count for an event
     */
    listenerCount(event: string): number;
    /**
     * Get all event names
     */
    eventNames(): string[];
}
export {};
//# sourceMappingURL=event-emitter.d.ts.map