import OpenAI from 'openai';
import { store } from '../utils/tempStore';
import config from '../config';
import fs from 'fs';

export class TranscriptionService {
  private openai: OpenAI;

  constructor() {
    this.openai = new OpenAI({
      apiKey: config.openai.apiKey,
    });
  }

  async transcribeAudio(
    filePath: string,
    language?: string
  ): Promise<{ text: string; transcriptionId: string }> {
    try {
      const transcription = await this.openai.audio.transcriptions.create({
        file: fs.createReadStream(filePath),
        model: 'whisper-1',
        language: language,
        response_format: 'json',
      });

      // Generate a unique ID for this transcription
      const transcriptionId = `${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;

      // Store the transcription
      store.saveTranscription(transcriptionId, transcription.text, {
        language,
        timestamp: new Date(),
      });

      // Clean up the temporary file
      fs.unlink(filePath, (err) => {
        if (err) console.error('Error deleting temporary file:', err);
      });

      return {
        text: transcription.text,
        transcriptionId,
      };
    } catch (error) {
      // Clean up the temporary file in case of error
      fs.unlink(filePath, (err) => {
        if (err) console.error('Error deleting temporary file:', err);
      });

      console.error('Transcription error:', error);
      throw new Error('Failed to transcribe audio file');
    }
  }
}

export const transcriptionService = new TranscriptionService();