import { AbstractTTSClient } from "../core/abstract-tts";
import type { SpeakOptions, TTSCredentials, UnifiedVoice } from "../types";
export interface CereVoiceTTSCredentials extends TTSCredentials {
    email?: string;
    password?: string;
    accessToken?: string;
    refreshToken?: string;
    baseURL?: string;
    voice?: string;
    sampleRate?: number;
    audioFormat?: "wav" | "mp3" | "ogg";
    properties?: Record<string, unknown> | string;
    propertiesJson?: string;
}
export interface CereVoiceTTSOptions extends SpeakOptions {
    voice?: string;
    audioFormat?: "wav" | "mp3" | "ogg";
    sampleRate?: number;
    language?: string;
    accent?: string;
    metadata?: boolean;
    providerOptions?: Record<string, string | number | boolean | undefined>;
}
type WordBoundaryResult = Array<{
    text: string;
    offset: number;
    duration: number;
}>;
export declare class CereVoiceTTSClient extends AbstractTTSClient {
    private email;
    private password;
    private accessToken;
    private refreshToken;
    private baseUrl;
    private audioFormat;
    private outputSampleRate?;
    private language?;
    private accent?;
    private metadata;
    private tokenExpiresAt;
    constructor(credentials?: CereVoiceTTSCredentials);
    private applyCredentialProperties;
    setVoice(voiceId: string, lang?: string): void;
    getProperty(property: string): any;
    setProperty(property: string, value: any): void;
    checkCredentials(): Promise<boolean>;
    protected getRequiredCredentials(): string[];
    protected _getVoices(): Promise<any[]>;
    protected _mapVoicesToUnified(rawVoices: any[]): Promise<UnifiedVoice[]>;
    synthToBytes(text: string, options?: CereVoiceTTSOptions): Promise<Uint8Array>;
    synthToBytestream(text: string, options?: CereVoiceTTSOptions): Promise<{
        audioStream: ReadableStream<Uint8Array>;
        wordBoundaries: WordBoundaryResult;
    }>;
    private requestSynthesis;
    private prepareInput;
    private shouldApplyProsody;
    private shouldRequestMetadata;
    private getWordBoundariesFromResponse;
    private parseMetadataXml;
    private fillMissingDurations;
    private parseXmlAttributes;
    private createWordBoundary;
    private fetchWithAuth;
    private ensureAccessToken;
    private login;
    private refreshAccessToken;
    private buildUrl;
    private resolveAudioFormat;
    private isSupportedAudioFormat;
    private acceptHeaderForFormat;
    private mapGender;
    private isXmlLike;
    private escapeXml;
    private decodeXmlEntities;
    private getHeader;
    private encodeBasicCredentials;
    private safeReadErrorText;
}
export {};