type Listener = (...args: any[]) => void;
/**
 * Manages state transitions and event handling for the AI assistant.
 * Provides a pub/sub system for components to listen to and react to state changes
 * (idle, connecting, connected, disconnecting, error).
 *
 * Usage:
 * - Subscribe to state changes: on('stateChange', (state, ...args) => {})
 * - Unsubscribe from events: off('stateChange', listener)
 * - Emit state changes: emitStateChange(STATE_CONNECTED)
 * - Emit custom events: emit('customEvent', ...args)
 */
declare class ButtonStateManager {
    private events;
    on(eventName: string, listener: Listener): void;
    off(eventName: string, listener: Listener): void;
    emit(eventName: string, ...args: any[]): void;
    emitStateChange(eventName: string, ...args: any[]): void;
    static get STATE_IDLE(): string;
    static get STATE_CONNECTING(): string;
    static get STATE_CONNECTED(): string;
    static get STATE_DISCONNECTING(): string;
    static get STATE_ERROR(): string;
}
export default ButtonStateManager;