/**
 * Hook for Text-to-Speech functionality
 */
import type { TTSOptions, TTSVoice } from '../browser-ai/index.js';
/**
 * Options for useTTS hook
 */
export interface UseTTSOptions {
    /** Auto-initialize on mount */
    autoInit?: boolean;
    /** Default TTS options */
    defaultOptions?: TTSOptions;
}
/**
 * Return type for useTTS hook
 */
export interface UseTTSReturn {
    /** Speak text */
    speak: (text: string, options?: TTSOptions) => Promise<void>;
    /** Stop speaking */
    stop: () => void;
    /** Pause speaking */
    pause: () => void;
    /** Resume speaking */
    resume: () => void;
    /** Initialize the adapter (called automatically if autoInit) */
    initialize: () => Promise<void>;
    /** Get available voices */
    getVoices: () => TTSVoice[];
    /** Current state (reactive) */
    readonly isSpeaking: boolean;
    readonly isPaused: boolean;
    readonly isReady: boolean;
    readonly isInitializing: boolean;
    readonly error: Error | null;
    readonly downloadProgress: number;
}
/**
 * Hook for Text-to-Speech
 *
 * @example
 * ```svelte
 * <script>
 *   import { useTTS } from '@happyvertical/smrt-svelte';
 *
 *   const tts = useTTS();
 *   let text = 'Hello, world!';
 *
 *   async function handleSpeak() {
 *     if (tts.isSpeaking) {
 *       tts.stop();
 *     } else {
 *       await tts.speak(text);
 *     }
 *   }
 * </script>
 *
 * <input bind:value={text} />
 * <button onclick={handleSpeak}>
 *   {tts.isSpeaking ? 'Stop' : 'Speak'}
 * </button>
 * ```
 */
export declare function useTTS(options?: UseTTSOptions): UseTTSReturn;
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