import { apiRequest, getPath } from './client.js';

export function normalizeLabelImagePayload(payload) {
  if (!payload) {
    return null;
  }

  if (payload instanceof Blob) {
    return {
      objectUrl: URL.createObjectURL(payload),
      contentType: payload.type,
    };
  }

  if (payload?.imageUrl) {
    return {
      objectUrl: payload.imageUrl,
      contentType: payload.contentType || 'image/png',
    };
  }

  if (payload?.imageSvg) {
    const blob = new Blob([payload.imageSvg], { type: 'image/svg+xml' });
    return {
      objectUrl: URL.createObjectURL(blob),
      contentType: 'image/svg+xml',
    };
  }

  if (payload?.label) {
    return {
      objectUrl: `data:image/png;base64,${payload.label}`,
      contentType: 'image/png',
    };
  }

  return null;
}

export async function previewLabel(store, body) {
  const payload = await apiRequest(store, getPath('items'), {
    method: 'POST',
    body,
    accept: 'image/svg+xml, image/png, application/json',
    query: { label: 1, preview: 1 },
  });

  const image = normalizeLabelImagePayload(payload);
  if (image) {
    return image;
  }

  throw new Error('Label preview response did not include an image.');
}