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

const CATEGORY_IMAGE_PREFIX = "uploads/images/category";
const CATEGORY_SHAFAFIAT_PREFIX = "uploads/images/category/shafafiat";
const TERMS_FILE_PREFIX = "uploads/files/terms";

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

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

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

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

  try {
    await s3Storage.deleteObject(`${CATEGORY_SHAFAFIAT_PREFIX}/${fileName}`);
  } catch (error) {
    console.log("Failed to delete shafafiat icon 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(
    `${CATEGORY_IMAGE_PREFIX}/${imageName}`,
    buffer,
    "image/jpeg"
  );

  return imageName;
};

const uploadShafafiatIcon = async (fileData, fileName, contentType) => {
  await s3Storage.uploadBuffer(
    `${CATEGORY_SHAFAFIAT_PREFIX}/${fileName}`,
    fileData,
    contentType
  );

  return fileName;
};

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

  return fileName;
};

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

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

module.exports = {
  CATEGORY_IMAGE_PREFIX,
  CATEGORY_SHAFAFIAT_PREFIX,
  TERMS_FILE_PREFIX,
  getStoredImageName,
  deleteCategoryImage,
  deleteShafafiatIcon,
  uploadProcessedImage,
  uploadShafafiatIcon,
  uploadTermsFile,
  deleteTermsFile,
};