/**
 * ElevenLabs TTS Service Integration
 */

interface TTSOptions {
  text: string;
  voiceId?: string;
  modelId?: string;
}

interface TTSResponse {
  audioUrl: string;
  duration: number;
  format: string;
}

export async function generateTTS(options: TTSOptions): Promise<TTSResponse> {
  const {
    text,
    voiceId = process.env.ELEVENLABS_VOICE_ID,
    modelId = 'eleven_monolingual_v1',
  } = options;

  const apiKey = process.env.ELEVENLABS_API_KEY;

  if (!apiKey) {
    throw new Error('ELEVENLABS_API_KEY is not set');
  }

  if (!voiceId) {
    throw new Error('ELEVENLABS_VOICE_ID is not set');
  }

  try {
    // Placeholder: actual ElevenLabs API call
    console.log(`[TTS] Generating speech: "${text}" with voice: ${voiceId}`);

    return {
      audioUrl: `audio-${Date.now()}.mp3`,
      duration: Math.ceil(text.split(' ').length * 0.5), // Rough estimate
      format: 'mp3',
    };
  } catch (error) {
    console.error('[TTS Error]', error);
    throw error;
  }
}

export async function listVoices(): Promise<any[]> {
  const apiKey = process.env.ELEVENLABS_API_KEY;

  if (!apiKey) {
    throw new Error('ELEVENLABS_API_KEY is not set');
  }

  // Placeholder: actual ElevenLabs API call
  console.log('[TTS] Fetching available voices');

  return [
    { voice_id: 'default', name: 'Default Voice' },
  ];
}

export default {
  generateTTS,
  listVoices,
};