import { spawn } from 'child_process';
import path from 'path';
import fs from 'fs';

export class TranscriptionService {
  private static instance: TranscriptionService;
  
  static getInstance(): TranscriptionService {
    if (!TranscriptionService.instance) {
      TranscriptionService.instance = new TranscriptionService();
    }
    return TranscriptionService.instance;
  }

  async transcribeAudio(audioPath: string): Promise<string> {
    try {
      console.log(`Audio transcription requested for: ${audioPath}`);
      
      // For deployment compatibility, return a fallback message
      // This avoids system dependency issues with Whisper/PyTorch in Cloud Run
      return "Audio message (transcription requires additional setup)";
      
    } catch (error) {
      console.error("Transcription service error:", error);
      return "Audio message (transcription unavailable)";
    }
  }

  private executeWhisper(audioPath: string): Promise<string> {
    // Removed for deployment compatibility - avoids PyTorch dependency
    return Promise.resolve("Audio message (transcription requires additional setup)");
  }
}