src/shared/services/invoice.service.ts

import { s3, generateSignedUrl, generateDownloadUrl } from '../../middlewares/multer';
import { logger } from '../../utils/logger';

export const uploadInvoice = async (files: Express.Multer.File[]) => {
  const uploadPromises = files.map(async (file) => {
    const objectKey = Date.now().toString() + '-' + file.originalname;
    const bucketName = process.env.AWS_S3_BUCKET_NAME || '';

    try {
      const signedUrl = await generateSignedUrl({
        bucketName,
        objectKey,
        contentType: file.mimetype,
      });

      // Use fetch to upload the file using the signed URL
      const response = await fetch(signedUrl, {
        method: 'PUT',
        headers: {
          'Content-Type': file.mimetype,
        },
        body: file.buffer,
      });

      if (!response.ok) {
        throw new Error('File upload failed');
      }

      // Generate download URL
      const downloadUrl = await generateDownloadUrl({
        bucketName: process.env.AWS_S3_BUCKET_NAME || '',
        objectKey,
      });

      return { file: file.originalname, url: downloadUrl };

    } catch (err:any) {
      logger.error('Error uploading file');
      logger.error(err);
      return { file: file.originalname, error: err.message };
    }
  });

  return Promise.all(uploadPromises);
};

export const getDownloadUrl = async (filename: string) => {
  const objectKey = Date.now().toString() + '-' + filename;
  const bucketName = process.env.AWS_S3_BUCKET_NAME || '';
  const downloadUrl = await generateDownloadUrl({
    bucketName: bucketName,
    objectKey,
  });
  return downloadUrl;
}