export const IMAGE_UPLOAD_MAX_BYTES = 2 * 1024 * 1024;
export const FILE_UPLOAD_MAX_BYTES = 10 * 1024 * 1024;

const IMAGE_FILE_EXTENSION = /\.(?:avif|bmp|gif|heic|heif|jpe?g|png|svg|webp)$/i;

export function isImageUpload(file: Pick<File, 'name' | 'type'>) {
  return file.type.toLowerCase().startsWith('image/') || IMAGE_FILE_EXTENSION.test(file.name);
}

export function assertUploadFileSize(
  file: Pick<File, 'name' | 'size' | 'type'>,
  customLimit?: { bytes: number; message: string },
) {
  if (customLimit) {
    if (file.size > customLimit.bytes) throw new Error(customLimit.message);
    return;
  }
  const image = isImageUpload(file);
  const limit = image ? IMAGE_UPLOAD_MAX_BYTES : FILE_UPLOAD_MAX_BYTES;
  if (file.size > limit) {
    throw new Error(image ? '图片大小不能超过 2MB' : '文件大小不能超过 10MB');
  }
}