import { Vowel } from '../../core/VowelClient';
import { VowelClientConfig } from '../../types';
/**
 * Main controller for Vowel instance in extension background script
 *
 * This controller:
 * - Manages a single Vowel client instance
 * - Routes messages from content scripts to appropriate handlers
 * - Broadcasts state updates to all listening content scripts
 * - Handles extension lifecycle (install, update, suspend)
 *
 * @example
 * ```typescript
 * const controller = new ExtensionVowelController({
 *   apiKey: 'vkey_public_xxx',
 *   systemInstruction: 'Custom instructions...',
 * });
 *
 * await controller.initialize();
 * ```
 */
export declare class ExtensionVowelController {
    private vowelClient;
    private messageRouter;
    private stateSync;
    private config;
    constructor(config: VowelClientConfig);
    /**
     * Initialize the Vowel client with extension-specific adapters
     */
    initialize(): Promise<void>;
    /**
     * Start a voice session
     *
     * @param tabId - Optional tab ID to associate with session
     */
    startSession(tabId?: number): Promise<void>;
    /**
     * Stop the current voice session
     */
    stopSession(): Promise<void>;
    /**
     * Get current Vowel state
     *
     * @returns Current state object
     */
    getState(): any;
    /**
     * Update configuration
     *
     * @param config - Partial configuration to update
     */
    updateConfig(config: Partial<VowelClientConfig>): void;
    /**
     * Register a custom action that the AI can perform
     *
     * Forwards to the internal Vowel client's registerAction method
     *
     * @param name - Action name (will be used as tool name)
     * @param definition - Action definition with parameters
     * @param handler - Function to execute when action is called
     *
     * @example
     * ```ts
     * controller.registerAction('goToSite', {
     *   description: 'Navigate to a website',
     *   parameters: {
     *     url: { type: 'string', description: 'URL to navigate to' }
     *   }
     * }, async ({ url }) => {
     *   // Implementation
     * });
     * ```
     */
    registerAction<T = any>(name: string, definition: any, handler: (params: T) => Promise<any>): void;
    /**
     * Cleanup resources
     */
    cleanup(): Promise<void>;
    /**
     * Get the Vowel client instance (for direct access if needed)
     *
     * @returns Vowel client instance or null
     */
    getVowelClient(): Vowel | null;
    /**
     * Setup message listeners from content scripts
     */
    private setupMessageListeners;
    /**
     * Setup extension lifecycle handlers
     */
    private setupLifecycleHandlers;
}
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