const sharp = require("sharp");
const s3Storage = require("./s3Storage");

const NEWS_IMAGE_PREFIX = "uploads/images/news";
const NEWS_ATTACHMENT_PREFIX = "uploads/files/newsAttachments";

const getStoredImageName = (doc, field) =>
  doc.get(field, null, { getters: false });

const deleteNewsImage = async (doc, field) => {
  const fileName = getStoredImageName(doc, field);
  if (!fileName) return;

  try {
    await s3Storage.deleteObject(`${NEWS_IMAGE_PREFIX}/${fileName}`);
  } catch (error) {
    console.log(`Failed to delete ${field} from S3:`, error?.message);
  }
};

const uploadProcessedImage = async (
  imageData,
  imageName,
  width,
  height,
  quality
) => {
  const buffer = await sharp(imageData)
    .resize(width, height, { fit: "cover" })
    .jpeg({ quality })
    .toBuffer();

  await s3Storage.uploadBuffer(
    `${NEWS_IMAGE_PREFIX}/${imageName}`,
    buffer,
    "image/jpeg"
  );

  return imageName;
};

const uploadNewsAttachment = async (
  fileData,
  fileName,
  contentType = "application/pdf"
) => {
  await s3Storage.uploadBuffer(
    `${NEWS_ATTACHMENT_PREFIX}/${fileName}`,
    fileData,
    contentType
  );

  return fileName;
};

const deleteNewsAttachment = async (fileName) => {
  if (!fileName) return;

  try {
    await s3Storage.deleteObject(`${NEWS_ATTACHMENT_PREFIX}/${fileName}`);
  } catch (error) {
    console.log(`Failed to delete attachment from S3:`, error?.message);
  }
};

module.exports = {
  NEWS_IMAGE_PREFIX,
  NEWS_ATTACHMENT_PREFIX,
  getStoredImageName,
  deleteNewsImage,
  uploadProcessedImage,
  uploadNewsAttachment,
  deleteNewsAttachment,
};