import { Readable } from 'stream';

interface VolcanoConfig {
    appId: string;
    accessToken: string;
    userId?: string;
}
interface EdgeConfig {
    trustedToken: string;
}
interface OpenAIConfig {
    apiKey: string;
    model?: string;
    baseUrl?: string;
}
interface TTSConfig {
    /**
     * 默认音色
     *
     * 当指定的音色不存在时，会 fallback 到默认音色
     */
    defaultSpeaker?: string;
    volcano?: VolcanoConfig;
    edge?: EdgeConfig;
    openai?: OpenAIConfig;
}
type TTSBuilder = (options: TTSConfig & {
    stream?: Readable;
    text: string;
    speaker: string;
}) => Promise<Uint8Array | null>;
interface CustomTextProcessorParams {
    text: string;
    outputStream: Readable;
    tts: (options: TTSOptions) => Promise<Uint8Array | null>;
    options: TTSOptions;
}
interface TTSOptions extends TTSConfig {
    stream?: Readable;
    text?: string;
    speaker?: string;
    protocol?: "default" | "websocket";
    operation?: "submit" | "query";
    signal?: AbortSignal;
    textFilter?: (text: string) => string;
    customTextProcessor?: (params: CustomTextProcessorParams) => Promise<void>;
    audioReplacements?: any;
    audioBasePath?: string;
}
interface TTSSpeaker {
    /**
     * 音色名称
     */
    name?: string;
    /**
     * 音色性别分类，男女（可选）
     */
    gender?: string;
    /**
     * 音色标识
     */
    speaker: string;
}
interface TTSProvider {
    name: string;
    speakers: TTSSpeaker[];
    tts: TTSBuilder;
}

/**
 * 此处注册 TTS 服务提供商
 */
declare const kTTSProviders: TTSProvider[];
declare const kTTSSpeakers: TTSSpeaker[];
declare function tts(options: TTSOptions): Promise<Uint8Array<ArrayBufferLike> | null>;
declare function createTTS(config: TTSConfig): (options: TTSOptions) => Promise<Uint8Array<ArrayBufferLike> | null>;
declare function tts2(options: TTSOptions): Promise<Uint8Array<ArrayBufferLike> | null>;
declare function createTTS2(config: TTSConfig): (options: TTSOptions) => Promise<Uint8Array<ArrayBufferLike> | null>;

export { type TTSConfig, type TTSOptions, createTTS, createTTS2, kTTSProviders, kTTSSpeakers, tts, tts2 };