export default defineEventHandler(async (event) => {
  const form = await readMultipartFormData(event)
  if (!form?.length) {
    throw createError({ statusCode: 400, statusMessage: 'Expected an image upload' })
  }
  const fields: Record<string, string> = {}
  let image: { filename: string; data: Buffer; type?: string } | null = null
  for (const part of form) {
    if (part.name === 'image' && part.filename && part.data?.length) {
      image = { filename: part.filename, data: part.data, type: part.type }
    } else if (part.name && part.data) {
      fields[part.name] = part.data.toString('utf8')
    }
  }
  if (!image) {
    throw createError({ statusCode: 400, statusMessage: 'An image is required' })
  }
  const { owner } = assertLibraryOwner(event)
  const library = publicLibrary(event)
  const folderId = library.folders.some(folder => folder.id === fields.folderId)
    ? fields.folderId
    : library.folders[0]?.id
  if (!folderId) {
    throw createError({ statusCode: 400, statusMessage: 'Create a library folder first' })
  }
  assertFolderExists(event, folderId)
  const still = await saveStill({
    ownerKey: owner,
    folderId,
    filename: image.filename,
    data: image.data,
    width: Number(fields.width || 0),
    height: Number(fields.height || 0),
    hideInput: fields.hideInput === 'true',
    role: 'input'
  })
  return { still: still || undefined, ...publicLibrary(event) }
})