// Single source of truth for all backend communication.



/** WebView consoles stringify objects as [object Object]; log JSON text. */
function logApi(tag, details) {
  let text;
  try {
    text = JSON.stringify(details, null, 2);
  } catch {
    text = String(details);
  }
  console[tag === 'error-body' ? 'error' : 'log'](`[api] ${tag} ${text}`);
}

function readableHeaders(headers) {
  const out = {};
  headers.forEach((value, key) => {
    out[key] = value;
  });
  return out;
}

async function http(path, { method = 'GET', body } = {}) {
  const isFormData = typeof FormData !== 'undefined' && body instanceof FormData;
  const headers = {};
  if (!isFormData) {
    headers['Content-Type'] = 'application/json';
  }
  const url = new URL(path, window.location.origin).href;

  logApi('request', {
    method,
    path,
    url,
    origin: window.location.origin,
    credentials: 'include',
    // HttpOnly cookies are invisible here; this only shows JS-readable cookies.
    documentCookie: document.cookie || '(empty)',
    hasBody: Boolean(body),
  });

  const res = await fetch(path, {
    method,
    headers,
    credentials: 'include',
    body: isFormData ? body : (body ? JSON.stringify(body) : undefined),
  });

  const responseHeaders = readableHeaders(res.headers);
  // Browsers hide Set-Cookie from JS; if it's missing here that proves nothing.
  logApi('response', {
    method,
    path,
    status: res.status,
    statusText: res.statusText,
    ok: res.ok,
    responseHeaders,
    documentCookieAfter: document.cookie || '(empty)',
  });

  if (!res.ok) {
    let message = res.statusText;
    let data;
    try {
      data = await res.json();
      message = data.error || data.message || message;
    } catch {
      message = (await res.text().catch(() => message)) || message;
    }
    logApi('error-body', { method, path, status: res.status, message, data });
    const err = new Error(message || `Request failed (${res.status})`);
    err.status = res.status;
    err.path = path;
    err.method = method;
    err.data = data;
    throw err;
  }
  if (res.status === 204) return null;
  const json = await res.json();
  logApi('ok-body', {
    method,
    path,
    keys: json && typeof json === 'object' ? Object.keys(json) : typeof json,
    hasUser: Boolean(json?.user),
  });
  return json;
}

async function httpBinary(path, { method = 'POST', body, contentType, headers: extraHeaders } = {}) {
  const url = new URL(path, window.location.origin).href;

  logApi('request', {
    method,
    path,
    url,
    origin: window.location.origin,
    credentials: 'include',
    contentType,
    bodyBytes: body?.byteLength ?? body?.size ?? null,
  });

  const res = await fetch(path, {
    method,
    headers: { 'Content-Type': contentType, ...(extraHeaders || {}) },
    credentials: 'include',
    body,
  });

  const responseHeaders = readableHeaders(res.headers);
  logApi('response', {
    method,
    path,
    status: res.status,
    statusText: res.statusText,
    ok: res.ok,
    responseHeaders,
  });

  if (!res.ok) {
    let message = res.statusText;
    let data;
    try {
      data = await res.json();
      message = data.error || data.message || message;
    } catch {
      message = (await res.text().catch(() => message)) || message;
    }
    logApi('error-body', { method, path, status: res.status, message, data });
    const err = new Error(message || `Request failed (${res.status})`);
    err.status = res.status;
    err.path = path;
    err.method = method;
    err.data = data;
    throw err;
  }
  if (res.status === 204) return null;
  const json = await res.json();
  logApi('ok-body', {
    method,
    path,
    keys: json && typeof json === 'object' ? Object.keys(json) : typeof json,
    hasArticle: Boolean(json?.article),
  });
  return json;
}

/** GET a file (e.g. a ZIP download). Returns a Blob on success; JSON errors on failure. */
async function httpGetBinary(path) {
  logApi('request', {
    method: 'GET',
    path,
    url: new URL(path, window.location.origin).href,
    origin: window.location.origin,
    credentials: 'include',
  });

  const res = await fetch(path, { method: 'GET', credentials: 'include' });

  logApi('response', {
    method: 'GET',
    path,
    status: res.status,
    statusText: res.statusText,
    ok: res.ok,
    contentType: res.headers.get('content-type'),
    responseHeaders: readableHeaders(res.headers),
  });

  if (!res.ok) {
    let message = res.statusText;
    let data;
    try {
      data = await res.json();
      message = data.error || data.message || message;
    } catch {
      message = (await res.text().catch(() => message)) || message;
    }
    logApi('error-body', { method: 'GET', path, status: res.status, message, data });
    const err = new Error(message || `Request failed (${res.status})`);
    err.status = res.status;
    err.path = path;
    err.method = 'GET';
    err.data = data;
    throw err;
  }

  const blob = await res.blob();
  return blob;
}

/**
 * NOTE: there is no `articleIndex` namespace anymore.
 *
 * The whole-company search index (`GET /api/articleIndex`) was abandoned. Article
 * lists are fetched per category via `category.getArticles(categoryId)`
 * (`GET /api/category/:id/articles`); `categoryAutomat.loadTree()` warms every
 * category view right after the tree loads, and `articleIndexAutomat` derives the
 * client-side search index from those views.
 */

export const article = {
  search({ target, filter, offset, maxCount } = {}) {
    const params = new URLSearchParams({ target });
    if (filter) params.set('filter', filter);
    if (offset) params.set('offset', String(offset));
    if (maxCount != null) params.set('maxCount', String(maxCount));
    return http(`/api/article/search?${params}`);
  },

  /**
   * GET /api/article/:sku → { article }
   * Detail: prices[], photos[], eans[], brand, unit, categoryIds, …
   * (Flat net/taxRate/fullHash/thumb* only on category tree / getCategoryArticles.)
   */
  getBySku(sku) {
    return http(`/api/article/${encodeURIComponent(sku)}`);
  },

  /**
   * GET /api/article/history
   * History of all articles with paging/sorting/filtering
   */
  getHistory({ startRow, endRow, offset, limit, sortModel, filterModel } = {}) {
    const params = new URLSearchParams();
    if (startRow != null) params.set('startRow', String(startRow));
    if (endRow != null) params.set('endRow', String(endRow));
    if (offset != null) params.set('offset', String(offset));
    if (limit != null) params.set('limit', String(limit));
    if (sortModel && sortModel.length) params.set('sort', JSON.stringify(sortModel));
    if (filterModel && Object.keys(filterModel).length) params.set('filter', JSON.stringify(filterModel));
    const qs = params.toString();
    return http(`/api/article/history${qs ? `?${qs}` : ''}`);
  },

  /**
   * GET /api/article/:sku/history
   */
  getBySkuHistory(sku, { limit } = {}) {
    const params = new URLSearchParams();
    if (limit != null) params.set('limit', String(limit));
    const qs = params.toString();
    return http(`/api/article/${encodeURIComponent(sku)}/history${qs ? `?${qs}` : ''}`);
  },

  /** POST /api/article → 201 { article } */
  create({ parentId, name, track_stock }) {
    return http('/api/article', {
      method: 'POST',
      body: {
        parentId: Number(parentId),
        name,
        ...(track_stock !== undefined ? { track_stock: Boolean(track_stock) } : {}),
      },
    });
  },

  /**
   * PATCH /api/article/:sku
   * Body: at least one of { name, unitamount, unitSi, track_stock, desc, seo }
   * unitSi must exist for selected company → 404 Unit not found
   * → 200 { article } (same detail shape as GET: includes desc, seo)
   */
  update(sku, body) {
    return http(`/api/article/${encodeURIComponent(sku)}`, {
      method: 'PATCH',
      body,
    });
  },

  /**
   * PUT /api/article/:sku/track_stock
   * Body: { track_stock: boolean }
   * → 200 { article }
   */
  setTrackStock(sku, body) {
    const payload = typeof body === 'boolean' ? { track_stock: body } : body;
    return http(`/api/article/${encodeURIComponent(sku)}/track_stock`, {
      method: 'PUT',
      body: payload,
    });
  },

  /**
   * DELETE /api/article/:sku → 204
   * Errors: 400 Article has children, 401, 403, 404 Article not found
   */
  delete(sku, { cascade = false } = {}) {
    const qs = cascade ? '?cascade=true' : '';
    return http(`/api/article/${encodeURIComponent(sku)}${qs}`, {
      method: 'DELETE',
    });
  },

  /**
   * POST /api/article/:sku/image
   * Body: raw image bytes (Content-Type: image/webp, max 1000×1000)
   * → 201 { image: { picId, sort, full, thumb, fullHash, thumbHash } }
   */
  uploadImage(sku, file) {
    return httpBinary(`/api/article/${encodeURIComponent(sku)}/image`, {
      method: 'POST',
      contentType: file?.type || 'image/webp',
      body: file,
    });
  },

  /**
   * DELETE /api/article/:sku/image/:fullHash → 204
   */
  deleteImage(sku, fullHash) {
    return http(
      `/api/article/${encodeURIComponent(sku)}/image/${encodeURIComponent(fullHash)}`,
      { method: 'DELETE' },
    );
  },

  /**
   * PUT /api/article/:sku/images/order
   * Body: { fullHashes: string[] } (every image exactly once)
   * → 200 { fullHashes: string[] }
   */
  orderImages(sku, fullHashes) {
    return http(`/api/article/${encodeURIComponent(sku)}/images/order`, {
      method: 'PUT',
      body: { fullHashes },
    });
  },

  /**
   * PUT /api/article/:sku/prices
   * Body: { prices: [{ price (net), tax (rate), minmultiplier? }] }
   * Replace-all POS customer group prices. Empty prices clears all POS prices.
   * → 200 { article } (same shape as GET by SKU)
   */
  setPrices(sku, prices) {
    return http(`/api/article/${encodeURIComponent(sku)}/prices`, {
      method: 'PUT',
      body: { prices },
    });
  },

  /**
   * PUT /api/article/:sku/weight
   * Body: { weight } → 200 { article }
   */
  setWeight(sku, body) {
    return http(`/api/article/${encodeURIComponent(sku)}/weight`, {
      method: 'PUT',
      body,
    });
  },

  /**
   * PUT /api/article/:sku/brand
   * Body: { brandId: number | null } — null clears the brand.
   * brandId must belong to the article's company → 404 Article or brand not found.
   * → 200 { article } (same shape as GET by SKU)
   */
  setBrandIdBySku(sku, brandId) {
    return http(`/api/article/${encodeURIComponent(sku)}/brand`, {
      method: 'PUT',
      body: { brandId: brandId != null ? Number(brandId) : null },
    });
  },

  /**
   * PUT /api/article/:sku/eans
   * Body: { eans: string[] } — replace-all. Empty array clears all.
   * EANs must be non-empty unique strings → 400 Invalid eans.
   * → 200 { article } (same shape as GET by SKU)
   */
  setEansBySku(sku, eans) {
    return http(`/api/article/${encodeURIComponent(sku)}/eans`, {
      method: 'PUT',
      body: { eans },
    });
  },

  /**
   * PUT /api/article/:sku/categories
   * Body: { categoryIds: number[] } — replace-all. Empty array clears all.
   * Categories must belong to the article's company; ids must be unique.
   * → 200 { article } (same shape as GET by SKU)
   */
  setCategories(sku, categoryIds) {
    return http(`/api/article/${encodeURIComponent(sku)}/categories`, {
      method: 'PUT',
      body: { categoryIds },
    });
  },

  /**
   * GET /api/article/:sku/supplier → { suppliers: ArticleSupplier[] }
   */
  getSuppliers(sku) {
    return http(`/api/article/${encodeURIComponent(sku)}/supplier`);
  },

  /**
   * POST /api/article/:sku/supplier
   * Body: { entityId, sku?, pu?, stock?, sort?, netPrice?, taxId?, taxRate? }
   * → 201 { supplier: ArticleSupplier }
   */
  addSupplier(sku, body) {
    const payload = {
      ...body,
      entityId: Number(body?.entityId),
    };
    return http(`/api/article/${encodeURIComponent(sku)}/supplier`, {
      method: 'POST',
      body: payload,
    });
  },

  /**
   * PATCH /api/article/:sku/supplier/:id
   * Body: { sku?, pu?, stock?, sort?, netPrice?, taxId?, taxRate? }
   * → 200 { supplier: ArticleSupplier }
   */
  updateSupplier(sku, id, body) {
    return http(
      `/api/article/${encodeURIComponent(sku)}/supplier/${encodeURIComponent(id)}`,
      {
        method: 'PATCH',
        body,
      },
    );
  },

  /**
   * PUT /api/article/:sku/supplier/order
   * Body: { ids: number[] }
   * → 200 { ids: number[] }
   */
  orderSuppliers(sku, ids) {
    return http(`/api/article/${encodeURIComponent(sku)}/supplier/order`, {
      method: 'PUT',
      body: { ids },
    });
  },

  /**
   * DELETE /api/article/:sku/supplier/:id → 204
   */
  deleteSupplier(sku, id) {
    return http(
      `/api/article/${encodeURIComponent(sku)}/supplier/${encodeURIComponent(id)}`,
      {
        method: 'DELETE',
      },
    );
  },

  /**
   * GET /api/article/export.zip → application/zip (binary download)
   * `artikel.zip` = artikel.csv (semicolon-separated, Windows-1252) +
   * one `<fullHash>.avif` per article image (content-addressed, deduplicated).
   * Optional `categoryId` restricts the export to that category and below.
   * Errors: 400 No company selected, 401, 403, 404 (JSON { error }).
   */
  exportZip(categoryId) {
    const params = new URLSearchParams();
    if (categoryId != null) params.set('categoryId', String(categoryId));
    const qs = params.toString();
    return httpGetBinary(`/api/article/export.zip${qs ? `?${qs}` : ''}`);
  },
  /**
   * POST /api/article/:sku/print
   * Body: { printerId, templateId, quantity }
   * Prints the given template to the specified printer for this article.
   */
  printLabel(sku, body) {
    return http(`/api/article/${encodeURIComponent(sku)}/print`, {
      method: 'POST',
      body,
    });
  },
  /**
   * GET /api/article/:sku/attributevalue → { attributevalues: ArticleAttributeValue[] }
   */
  getAttributeValues(sku) {
    return http(`/api/article/${encodeURIComponent(sku)}/attributevalue`);
  },

  /**
   * PUT /api/article/:sku/attributevalue
   * Body: { attributevalues: number[] | { attributeValueId: number, sort?: number }[] }
   * → 200 { attributevalues: ArticleAttributeValue[] }
   */
  setAttributeValues(sku, attributevalues) {
    return http(`/api/article/${encodeURIComponent(sku)}/attributevalue`, {
      method: 'PUT',
      body: { attributevalues },
    });
  },

  /**
   * GET /api/article/:sku/property → { properties: ArticleProperty[] }
   */
  getProperties(sku) {
    return http(`/api/article/${encodeURIComponent(sku)}/property`);
  },

  /**
   * PUT /api/article/:sku/property
   * Body: { properties: { propertyId: number, value: string, sort?: number }[] }
   * → 200 { properties: ArticleProperty[] }
   */
  setProperties(sku, properties) {
    return http(`/api/article/${encodeURIComponent(sku)}/property`, {
      method: 'PUT',
      body: { properties },
    });
  },

  /**
   * DELETE /api/article/:sku/property/:propertyId → 200 { ok: true }
   */
  deleteProperty(sku, propertyId) {
    return http(
      `/api/article/${encodeURIComponent(sku)}/property/${encodeURIComponent(propertyId)}`,
      { method: 'DELETE' }
    );
  },

  /**
   * POST /api/article/:sku/parent
   * Body: { isParent: boolean, attributeNameId?: number }
   */
  toggleParent(sku, body) {
    return http(`/api/article/${encodeURIComponent(sku)}/parent`, {
      method: 'POST',
      body,
    });
  },

  /**
   * GET /api/article/:sku/children → { children: [...] }
   */
  getChildren(sku) {
    return http(`/api/article/${encodeURIComponent(sku)}/children`);
  },

  /**
   * POST /api/article/:sku/children
   * Body: { attributeValueId?: number, value?: string, name?: string }
   */
  addChild(sku, body) {
    return http(`/api/article/${encodeURIComponent(sku)}/children`, {
      method: 'POST',
      body,
    });
  },

  /**
   * DELETE /api/article/:sku/children/:childSku
   */
  removeChild(sku, childSku, options = {}) {
    const qs = options?.deleteArticle ? '?deleteArticle=true' : '';
    return http(
      `/api/article/${encodeURIComponent(sku)}/children/${encodeURIComponent(childSku)}${qs}`,
      { method: 'DELETE' }
    );
  },

  /**
   * GET /api/article/:sku/articlelist → { items: [...] }
   */
  getArticlelist(sku) {
    return http(`/api/article/${encodeURIComponent(sku)}/articlelist`);
  },

  /**
   * PUT /api/article/:sku/articlelist
   * Body: { items: [{ articleId, sku, count, sort }] }
   */
  setArticlelist(sku, items) {
    return http(`/api/article/${encodeURIComponent(sku)}/articlelist`, {
      method: 'PUT',
      body: Array.isArray(items) ? { items } : items,
    });
  },

  /**
   * GET /api/article/:sku/optionslist → { options: [...] }
   */
  getOptionslist(sku) {
    return http(`/api/article/${encodeURIComponent(sku)}/optionslist`);
  },

  /**
   * PUT /api/article/:sku/optionslist
   * Body: { options: [{ articleId, sku, count, sort, mandated }] }
   */
  setOptionslist(sku, options) {
    return http(`/api/article/${encodeURIComponent(sku)}/optionslist`, {
      method: 'PUT',
      body: Array.isArray(options) ? { options } : options,
    });
  },
};

/**
 * Company-scoped printers (selectedCompanyId from session).
 * Shape: Printer = { id, address, type, model, serial, sort, desc }
 */
export const printer = {
  /** GET /api/printer → { printers: Printer[] } */
  list() {
    return http('/api/printer');
  },

  /** GET /api/printer/:id → { printer: Printer } */
  getById(id) {
    return http(`/api/printer/${id}`);
  },

  /**
   * POST /api/printer
   * Body: { address, type, model, serial, sort, desc }
   * → 201 { printer: Printer }
   */
  create(body) {
    return http('/api/printer', { method: 'POST', body });
  },

  /**
   * PATCH /api/printer/:id
   * Body: partial printer fields
   * → 200 { printer: Printer }
   */
  update(id, body) {
    return http(`/api/printer/${id}`, { method: 'PATCH', body });
  },

  /** DELETE /api/printer/:id → 204 */
  delete(id) {
    return http(`/api/printer/${id}`, { method: 'DELETE' });
  },

  /**
   * PUT /api/printer/order
   * Body: { printerIds: number[] }
   * → 200 { printerIds: number[] }
   */
  order({ printerIds }) {
    return http('/api/printer/order', { method: 'PUT', body: { printerIds } });
  },
};

/**
 * Company-scoped key/value settings (selectedCompanyId from session).
 * Shape: Setting = { key, value, frontend }
 */
export const setting = {
  /**
   * GET /api/company/setting
   * Optional query: { frontendOnly } → 200 { settings: Setting[] }
   */
  list({ frontendOnly } = {}) {
    const qs = frontendOnly ? '?frontendOnly=1' : '';
    return http(`/api/company/setting${qs}`);
  },

  /** GET /api/company/setting/:key → { setting: Setting } */
  get(key) {
    return http(`/api/company/setting/${encodeURIComponent(key)}`);
  },

  /**
   * PUT /api/company/setting/:key
   * Body: { value, frontend } → 200 { setting: Setting }
   */
  upsert(key, body) {
    return http(`/api/company/setting/${encodeURIComponent(key)}`, {
      method: 'PUT',
      body,
    });
  },
};

/**
 * Content-addressed thumb AVIF by fullHash (8-char alphanumeric, see dashback pic.js).
 * Auth: session cookie. Browser-cacheable (private, immutable, ETag).
 */
export const thumb = {
  /**
   * GET /api/thumb/:fullHash → image/avif (thumb bytes)
   * Use as <img src={thumb.url(fullHash)} /> (same-origin; cookies sent).
   */
  url(fullHash) {
    return `/api/thumb/${encodeURIComponent(fullHash)}`;
  },
};

/**
 * Company-scoped units (selectedCompanyId from session).
 * Shape: { si, basesi, basesifactor, symbol, name }
 */
export const unit = {
  /** GET /api/unit → { units: [...] } · 400 No company selected */
  list() {
    return http('/api/unit');
  },

  /**
   * PUT /api/unit
   * Body: { si, basesi, basesifactor, symbol, name }
   * → 200 { unit }
   */
  upsert(body) {
    return http('/api/unit', { method: 'PUT', body });
  },

  /**
   * DELETE /api/unit?si=… → 204
   * 409 Unit in use
   */
  delete(si) {
    const params = new URLSearchParams({ si });
    return http(`/api/unit?${params}`, { method: 'DELETE' });
  },
};

export const category = {
  /** GET /api/category/tree → { languageId, tree, articles } (company from session) */
  getTree() {
    return http('/api/category/tree');
  },

  /**
   * GET /api/category/:id/articles → { articles: [...] }
   * Article rows: sku, name, net, taxRate, fullHash, thumbW, thumbH, thumbHash, childCount, …
   */
  getArticles(categoryId) {
    return http(`/api/category/${categoryId}/articles`);
  },

  /** POST /api/category → 201 { category } */
  create({ parentId, name }) {
    return http('/api/category', {
      method: 'POST',
      body: { parentId: Number(parentId), name },
    });
  },

  /**
   * DELETE /api/category/:id → 204
   * Query: ?recursive=true (cascades deletion of subcategories and articles)
   */
  delete(categoryId, { recursive = false } = {}) {
    const qs = recursive ? '?recursive=true' : '';
    return http(`/api/category/${categoryId}${qs}`, { method: 'DELETE' });
  },

  /**
   * PATCH /api/category/:id
   * Body: { name } — renames and re-slugifies in the company default language.
   * Empty name → 400 name is required.
   * → 200 { category: { id, name, slug } }
   */
  updateName(categoryId, name) {
    return http(`/api/category/${categoryId}`, {
      method: 'PATCH',
      body: { name },
    });
  },

  /**
   * PUT /api/category/order
   * Body: { parentId, categoryIds: number[] } — sibling order of the children
   * under `parentId` (top-down). categoryIds must be exactly the current child
   * set of parentId (same count, no foreign/duplicate ids) → 400 Invalid category order.
   * → 200 { categoryIds: number[] }
   */
  reorder(parentId, categoryIds) {
    return http('/api/category/order', {
      method: 'PUT',
      body: { parentId, categoryIds },
    });
  },

  /**
   * PATCH /api/category/:id
   * Body: { parentId } — moves the category under a new parent.
   * → 200 { category: { id, parentId, sort } }  (kein name/slug im Response)
   */
  move(categoryId, parentId) {
    return http(`/api/category/${categoryId}`, {
      method: 'PATCH',
      body: { parentId },
    });
  },

  /**
   * PATCH /api/category/:id
   * Body: { pos: boolean } — toggles the POS (Point of Sale) flag.
   * → 200 { category: { id, pos } }
   *
   * PROPOSED — backend needs to implement this field.
   */
  updatePos(categoryId, pos) {
    return http(`/api/category/${categoryId}`, {
      method: 'PATCH',
      body: { pos },
    });
  },

  /**
   * POST /api/category/:id/image
   * Body: raw image bytes (Content-Type: image/webp)
   * → 201 { category: { id, fullHash, thumbW, thumbH, thumbHash } }
   */
  uploadImage(categoryId, file) {
    return httpBinary(`/api/category/${categoryId}/image`, {
      method: 'POST',
      contentType: file?.type || 'image/webp',
      body: file,
    });
  },

  /**
   * DELETE /api/category/:id/image
   * → 200 { category: { id, thumbW: null, thumbH: null, thumbHash: null } }
   */
  deleteImage(categoryId) {
    return http(`/api/category/${categoryId}/image`, { method: 'DELETE' });
  },

  /**
   * GET /api/category/export.zip → application/zip (binary download)
   * `kategorien.zip` = kategorien.csv (semicolon-separated, Windows-1252,
   * depth-first, `Ebene N` name column per depth) + one `<fullHash>.avif`
   * entry per category image (content-addressed, deduplicated).
   * Errors: 400 No company selected, 401, 403, 404 (JSON { error }).
   */
  exportZip() {
    return httpGetBinary('/api/category/export.zip');
  },
};

/**
 * Company-scoped brands (selectedCompanyId from session).
 * Shape: Brand = { id, name, gsprpinfo | null }
 */
export const brand = {
  /** GET /api/brand → { brands: Brand[] } · 400 No company selected */
  list() {
    return http('/api/brand');
  },

  /**
   * PUT /api/brand
   * Body: { name, gsprpinfo? } — upsert by name for the selected company.
   * Same name ⇒ update, otherwise create. Empty name ⇒ 400 Invalid brand.
   * → 200 { brand: Brand }
   */
  upsert(body) {
    return http('/api/brand', { method: 'PUT', body });
  },

  /**
   * DELETE /api/brand/:id
   * → 204 No Content · 404 Brand not found
   */
  delete(id) {
    return http(`/api/brand/${encodeURIComponent(id)}`, { method: 'DELETE' });
  },

  /**
   * POST /api/brand/:id/image
   * Accepts full-size image body (Content-Type: image/webp).
   * → 201 { brand: { id, fullHash, thumbW, thumbH, thumbHash, pics } }
   */
  addImage(brandId, file) {
    return httpBinary(`/api/brand/${brandId}/image`, {
      method: 'POST',
      contentType: file?.type || 'image/webp',
      body: file,
    });
  },

  /**
   * DELETE /api/brand/:id/image
   * → 200 { brand: { id, thumbW: null, thumbH: null, thumbHash: null, pics: [] } }
   */
  deleteImage(brandId) {
    return http(`/api/brand/${brandId}/image`, { method: 'DELETE' });
  },
};

export const attributename = {
  /** GET /api/attributename → { attributenames: Attributename[] } */
  list() {
    return http('/api/attributename');
  },

  /** POST /api/attributename → 201 { attributename } */
  create(body) {
    return http('/api/attributename', { method: 'POST', body });
  },

  /** PATCH /api/attributename/:id → 200 { attributename } */
  update(id, body) {
    return http(`/api/attributename/${encodeURIComponent(id)}`, { method: 'PATCH', body });
  },

  /** DELETE /api/attributename/:id → 200 */
  delete(id) {
    return http(`/api/attributename/${encodeURIComponent(id)}`, { method: 'DELETE' });
  },

  /** PUT /api/attributename/order → 200 */
  order(attributenameIds) {
    return http('/api/attributename/order', { method: 'PUT', body: { attributenameIds } });
  },
};

export const attributevalue = {
  /** GET /api/attributename/:attributeId/value → { values: AttributeValue[] } */
  listByAttributeId(attributeId) {
    return http(`/api/attributename/${encodeURIComponent(attributeId)}/value`);
  },

  /** POST /api/attributename/:attributeId/value → 201 { attributevalue } */
  create(attributeId, body) {
    return http(`/api/attributename/${encodeURIComponent(attributeId)}/value`, {
      method: 'POST',
      body,
    });
  },

  /** PATCH /api/attributevalue/:id → 200 { attributevalue } */
  update(id, body) {
    return http(`/api/attributevalue/${encodeURIComponent(id)}`, { method: 'PATCH', body });
  },

  /** DELETE /api/attributevalue/:id → 200 */
  delete(id) {
    return http(`/api/attributevalue/${encodeURIComponent(id)}`, { method: 'DELETE' });
  },

  /** PUT /api/attributename/:attributeId/value/order → 200 */
  order(attributeId, attributevalueIds) {
    return http(`/api/attributename/${encodeURIComponent(attributeId)}/value/order`, {
      method: 'PUT',
      body: { attributevalueIds },
    });
  },
};

export const propertyname = {
  /** GET /api/propertyname → { propertynames: Propertyname[] } */
  list() {
    return http('/api/propertyname');
  },

  /** POST /api/propertyname → 201 { propertyname } */
  create(body) {
    return http('/api/propertyname', { method: 'POST', body });
  },

  /** PATCH /api/propertyname/:id → 200 { propertyname } */
  update(id, body) {
    return http(`/api/propertyname/${encodeURIComponent(id)}`, { method: 'PATCH', body });
  },

  /** DELETE /api/propertyname/:id → 200 */
  delete(id) {
    return http(`/api/propertyname/${encodeURIComponent(id)}`, { method: 'DELETE' });
  },

  /** PUT /api/propertyname/order → 200 */
  order(propertynameIds) {
    return http('/api/propertyname/order', { method: 'PUT', body: { propertynameIds } });
  },
};

/**
 * Company-scoped suppliers / Lieferanten (selectedCompanyId from session).
 * Shape: Supplier = { id, name, createdAt, updatedAt }
 */
export const supplier = {
  /** GET /api/supplier → { suppliers: Supplier[] } */
  list() {
    return http('/api/supplier');
  },

  /**
   * POST /api/supplier
   * Body: { name } — empty name ⇒ 400 Name required.
   * → 201 { supplier: Supplier }
   */
  create(body) {
    return http('/api/supplier', { method: 'POST', body });
  },

  /**
   * PATCH /api/supplier/:id
   * Body: { name } — empty name ⇒ 400 Name required.
   * → 200 { supplier: Supplier }
   */
  update(id, body) {
    return http(`/api/supplier/${id}`, { method: 'PATCH', body });
  },

  /** DELETE /api/supplier/:id → 204 */
  delete(id) {
    return http(`/api/supplier/${id}`, { method: 'DELETE' });
  },

  /**
   * GET /api/supplier/:id/articles?skus=...
   * → 200 { articles: SupplierArticle[] }
   */
  getArticles(id, skus) {
    let query = '';
    if (skus != null) {
      const list = Array.isArray(skus) ? skus : [skus];
      const filtered = list.map((s) => String(s).trim()).filter(Boolean);
      if (filtered.length > 0) {
        query = `?skus=${encodeURIComponent(filtered.join(','))}`;
      }
    }
    return http(`/api/supplier/${encodeURIComponent(id)}/articles${query}`);
  },
};

/**
 * Company-scoped warehouses / Lager (selectedCompanyId from session).
 * Shape: Warehouse = { id, name }
 */
export const warehouse = {
  /** GET /api/warehouse → { warehouses: Warehouse[] } */
  list() {
    return http('/api/warehouse');
  },

  /** GET /api/warehouse/:id → { warehouse: Warehouse } */
  getById(id) {
    return http(`/api/warehouse/${id}`);
  },

  /**
   * POST /api/warehouse
   * Body: { name, sort? } — empty name ⇒ 400 Name required.
   * → 201 { warehouse: Warehouse }
   */
  create(body) {
    return http('/api/warehouse', { method: 'POST', body });
  },

  /**
   * PATCH /api/warehouse/:id
   * Body: { name?, sort? }
   * → 200 { warehouse: Warehouse }
   */
  update(id, body) {
    return http(`/api/warehouse/${id}`, { method: 'PATCH', body });
  },

  /**
   * PUT /api/warehouse/order
   * Body: { warehouseIds: number[] }
   * → 200 { warehouseIds: number[] }
   */
  order(body) {
    return http('/api/warehouse/order', { method: 'PUT', body });
  },

  /** DELETE /api/warehouse/:id → 204 */
  delete(id) {
    return http(`/api/warehouse/${id}`, { method: 'DELETE' });
  },
};

/**
 * Stock operations (manual stock adjustment).
 */
export const stock = {
  /**
   * POST /api/stock/adjust
   * Body: { sku, warehouseId, amount, text?, date?, externalNumber?, lines? }
   */
  adjust(body) {
    return http('/api/stock/adjust', { method: 'POST', body });
  },
};

/**
 * Company-scoped goods receipts (manifest type = delivery).
 * DeliverySummary = { id, number, externalNumber, type: 'delivery', supplierId, date }
 *   - number: server-allocated, read-only manifest number (from nextNumber('delivery')).
 *   - externalNumber: user-entered reference (nullable).
 * DeliveryLine = { id, articleId, sku, amount, net, transactedAmount, rebate, tax, comment }
 * Delivery = DeliverySummary & { lines: DeliveryLine[] }
 * DeliveryLineInput = { sku, amount, net, tax, rebate?, transactedAmount?, comment? }
 */
export const delivery = {
  /** GET /api/delivery → { deliveries: DeliverySummary[] } */
  list() {
    return http('/api/delivery');
  },

  /** GET /api/delivery/:id → { delivery: Delivery } */
  get(id) {
    return http(`/api/delivery/${id}`);
  },

  /**
   * POST /api/delivery
   * Body: { externalNumber?, date, supplierId?, lines: DeliveryLineInput[] }
   * number is NOT sent — the server allocates it automatically. The
   * caller-supplied reference goes in externalNumber (nullable).
   * Line requires sku, amount, net, tax. rebate→0, transactedAmount→amount.
   * → 201 { delivery: Delivery }
   */
  create(body) {
    return http('/api/delivery', { method: 'POST', body });
  },

  /**
   * PATCH /api/delivery/:id
   * Body: partial { externalNumber?, date?, supplierId?, lines? }.
   * number is read-only and cannot be edited. externalNumber is editable and
   * can be cleared by sending null or an empty string.
   * If lines present, replaces all lines; if omitted, lines unchanged.
   * → 200 { delivery: Delivery }
   */
  update(id, body) {
    return http(`/api/delivery/${id}`, { method: 'PATCH', body });
  },

  /** DELETE /api/delivery/:id → 204 */
  delete(id) {
    return http(`/api/delivery/${id}`, { method: 'DELETE' });
  },

  /**
   * GET /api/delivery/:id/file/:fileId → Blob
   * Full binary content of attached file (PDF, text, etc.)
   */
  async getFile(id, fileId, { download = false } = {}) {
    const query = download ? '?download=true' : '';
    const res = await fetch(`/api/delivery/${encodeURIComponent(id)}/file/${encodeURIComponent(fileId)}${query}`, {
      method: 'GET',
      credentials: 'include',
    });
    if (!res.ok) {
      let message = res.statusText;
      try {
        const data = await res.json();
        message = data.error || data.message || message;
      } catch { /* ignore */ }
      const err = new Error(message || `Request failed (${res.status})`);
      err.status = res.status;
      throw err;
    }
    return res.blob();
  },

  /**
   * POST /api/delivery/parse — multipart/form-data, field "file"
   * Accepts PDF, TXT or CSV document (max 50 MB)
   * Streams SSE events: status, llm_call, tool_call, usage, progress, result, error
   */
  async *parseSse(file, { signal } = {}) {
    const formData = new FormData();
    formData.append('file', file, file.name);
    const res = await fetch('/api/delivery/parse', {
      method: 'POST',
      credentials: 'include',
      body: formData,
      signal,
    });
    if (!res.ok) {
      let message = res.statusText;
      try {
        const data = await res.json();
        message = data.error || data.message || message;
      } catch { /* ignore */ }
      const err = new Error(message || `Request failed (${res.status})`);
      err.status = res.status;
      throw err;
    }
    const reader = res.body.getReader();
    const decoder = new TextDecoder();
    let buf = '';
    let currentEvent = 'message';

    const onAbort = () => {
      try {
        reader.cancel();
      } catch { /* ignore */ }
    };
    if (signal) {
      if (signal.aborted) {
        onAbort();
        return;
      }
      signal.addEventListener('abort', onAbort, { once: true });
    }

    try {
      while (true) {
        const { done, value } = await reader.read();
        if (done) break;
        buf += decoder.decode(value, { stream: true });
        const lines = buf.split('\n');
        buf = lines.pop();
        for (const line of lines) {
          if (line.startsWith('event:')) {
            currentEvent = line.slice(6).trim();
          } else if (line.startsWith('data:')) {
            const raw = line.slice(5).trim();
            let data;
            try { data = JSON.parse(raw); } catch { data = raw; }
            yield { event: currentEvent, data };
            currentEvent = 'message';
          }
        }
      }
    } catch (err) {
      if (signal?.aborted || err.name === 'AbortError') {
        return;
      }
      throw err;
    } finally {
      if (signal) {
        signal.removeEventListener('abort', onAbort);
      }
      try {
        reader.releaseLock();
      } catch { /* ignore */ }
    }
  },
};

/**
 * Serper Google Images search and WebP thumbnail streaming.
 */
export const serper = {
  /**
   * POST /api/serper/images
   * Body: { q, gl, hl, num, preferSource }
   * Streams SSE events: images, thumb, done, error
   *
   * @param {object} params
   * @param {string} params.q - Search query
   * @param {string} [params.gl='de'] - Country code
   * @param {string} [params.hl='de'] - Language code
   * @param {number} [params.num=100] - Result count (1-100)
   * @param {boolean} [params.preferSource=false] - Prefer high-res source image
   * @param {object} [options]
   * @param {AbortSignal} [options.signal] - Abort controller signal
   * @returns {AsyncGenerator<{event: string, data: any}>}
   */
  async *searchImages(
    { q, gl = 'de', hl = 'de', num = 100, preferSource = false } = {},
    { signal } = {},
  ) {
    const res = await fetch('/api/serper/images', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
      credentials: 'include',
      body: JSON.stringify({ q, gl, hl, num, preferSource }),
      signal,
    });
    if (!res.ok) {
      let message = res.statusText;
      try {
        const data = await res.json();
        message = data.error || data.message || message;
      } catch {
        /* ignore */
      }
      const err = new Error(message || `Request failed (${res.status})`);
      err.status = res.status;
      throw err;
    }
    const reader = res.body.getReader();
    const decoder = new TextDecoder();
    let buf = '';
    let currentEvent = 'message';

    const onAbort = () => {
      try {
        reader.cancel();
      } catch {
        /* ignore */
      }
    };
    if (signal) {
      if (signal.aborted) {
        onAbort();
        return;
      }
      signal.addEventListener('abort', onAbort, { once: true });
    }

    try {
      while (true) {
        const { done, value } = await reader.read();
        if (done) break;
        buf += decoder.decode(value, { stream: true });
        const lines = buf.split('\n');
        buf = lines.pop();
        for (const line of lines) {
          if (line.startsWith('event:')) {
            currentEvent = line.slice(6).trim();
          } else if (line.startsWith('data:')) {
            const raw = line.slice(5).trim();
            let data;
            try {
              data = JSON.parse(raw);
            } catch {
              data = raw;
            }
            yield { event: currentEvent, data };
            currentEvent = 'message';
          }
        }
      }
    } catch (err) {
      if (signal?.aborted || err.name === 'AbortError') {
        return;
      }
      throw err;
    } finally {
      if (signal) {
        signal.removeEventListener('abort', onAbort);
      }
      try {
        reader.releaseLock();
      } catch {
        /* ignore */
      }
    }
  },

  /**
   * POST /api/serper/image
   * Crawl image from URL, crop white/transparency margins, resize to max 1000px, return AVIF Blob.
   *
   * @param {string} url - External image URL to crawl and process
   * @param {object} [options]
   * @param {AbortSignal} [options.signal] - Abort controller signal
   * @returns {Promise<Blob>} AVIF image blob
   */
  async fetchImage(url, { signal } = {}) {
    const res = await fetch('/api/serper/image', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
      credentials: 'include',
      body: JSON.stringify({ url }),
      signal,
    });
    if (!res.ok) {
      let message = res.statusText;
      try {
        const data = await res.json();
        message = data.error || data.message || message;
      } catch {
        /* ignore */
      }
      const err = new Error(message || `Request failed (${res.status})`);
      err.status = res.status;
      throw err;
    }
    return await res.blob();
  },
};

/**
 * Append-only stock and payment ledger.
 * Entry = { id, manifestarticle_id, sku, transaction_type, amount, transaction_text, hash_version, prev_hash, created_at }
 * Input = { manifestarticle_id, transaction_type, amount, transaction_text }
 */
export const ledger = {
  /**
   * POST /api/ledger
   * Body: { manifestarticle_id, transaction_type, amount, transaction_text }
   * → 201 { ledger: LedgerEntry }
   */
  add(body) {
    return http('/api/ledger', { method: 'POST', body });
  },

  /**
   * GET /api/ledger/manifestarticle/:manifestarticleId
   * Query: ?transaction_type=...
   * → 200 { ledger: LedgerEntry[] }
   */
  listByManifestarticleId(manifestarticleId, transactionType) {
    const query = transactionType ? `?transaction_type=${encodeURIComponent(transactionType)}` : '';
    return http(`/api/ledger/manifestarticle/${encodeURIComponent(manifestarticleId)}${query}`);
  },

  /**
   * GET /api/ledger/sku/:sku
   * Query: ?transaction_type=...
   * → 200 { ledger: LedgerEntry[] }
   */
  listBySku(sku, transactionType) {
    const query = transactionType ? `?transaction_type=${encodeURIComponent(transactionType)}` : '';
    return http(`/api/ledger/sku/${encodeURIComponent(sku)}${query}`);
  },

  /**
   * GET /api/ledger
   * Query: { manifestarticle_id?, sku?, transaction_type? }
   * → 200 { ledger: LedgerEntry[] }
   */
  list(query) {
    const params = new URLSearchParams();
    if (query?.manifestarticle_id != null) params.set('manifestarticle_id', query.manifestarticle_id);
    if (query?.manifestarticleId != null) params.set('manifestarticle_id', query.manifestarticleId);
    if (query?.sku != null) params.set('sku', query.sku);
    if (query?.transaction_type != null) params.set('transaction_type', query.transaction_type);
    if (query?.transactionType != null) params.set('transaction_type', query.transactionType);
    const qs = params.toString();
    return http(`/api/ledger${qs ? `?${qs}` : ''}`);
  },
};

/**
 * Sales quotes (manifest type = quote).
 * Summary = { id, number, type: 'quote', entityId, date }
 * Line = { id, articleId, sku, amount, net, rebate, tax, comment } — no transactedAmount
 * LineInput = { sku, amount, net, tax, rebate?, comment? }
 */
export const quote = {
  /** GET /api/quote → { quotes: QuoteSummary[] } */
  list() {
    return http('/api/quote');
  },

  /** GET /api/quote/:id → { quote: Quote } */
  get(id) {
    return http(`/api/quote/${id}`);
  },

  /**
   * POST /api/quote
   * Body: { number, date, entityId?, lines }
   * → 201 { quote: Quote }
   */
  create(body) {
    return http('/api/quote', { method: 'POST', body });
  },

  /**
   * PATCH /api/quote/:id
   * Body: partial { number?, date?, entityId?, lines? }
   * → 200 { quote: Quote }
   */
  update(id, body) {
    return http(`/api/quote/${id}`, { method: 'PATCH', body });
  },

  /** DELETE /api/quote/:id → 204 */
  delete(id) {
    return http(`/api/quote/${id}`, { method: 'DELETE' });
  },
};

/**
 * Sales orders (manifest type = order).
 * Summary = { id, number, type: 'order', entityId, date }
 * Line shape same as quote (no transactedAmount).
 */
export const order = {
  /** GET /api/order → { orders: OrderSummary[] } */
  list() {
    return http('/api/order');
  },

  /** GET /api/order/:id → { order: Order } */
  get(id) {
    return http(`/api/order/${id}`);
  },

  /**
   * POST /api/order
   * Body: { number, date, entityId?, lines }
   * → 201 { order: Order }
   */
  create(body) {
    return http('/api/order', { method: 'POST', body });
  },

  /**
   * PATCH /api/order/:id
   * Body: partial { number?, date?, entityId?, lines? }
   * → 200 { order: Order }
   */
  update(id, body) {
    return http(`/api/order/${id}`, { method: 'PATCH', body });
  },

  /** DELETE /api/order/:id → 204 */
  delete(id) {
    return http(`/api/order/${id}`, { method: 'DELETE' });
  },
};

/**
 * Company-scoped customer groups.
 * Shape: CustomerGroup = { id, name, sort }
 * List item: CustomerGroup & { editable } — editable false for POS / Lieferanten
 * (name locked). Reorder via PUT /api/customergroup/order.
 */
export const customergroup = {
  /** GET /api/customergroup → { customergroups: (CustomerGroup & { editable })[] } ordered by sort */
  list() {
    return http('/api/customergroup');
  },

  /**
   * POST /api/customergroup
   * Body: { name } — empty name ⇒ 400 Name required;
   * reserved POS / Lieferanten ⇒ 400 Name not allowed; sort appends next index.
   * → 201 { customergroup: CustomerGroup }
   */
  create(body) {
    return http('/api/customergroup', { method: 'POST', body });
  },

  /**
   * PATCH /api/customergroup/:id
   * Body: { name } — locked groups cannot be renamed (Name cannot be changed).
   * → 200 { customergroup: CustomerGroup }
   */
  update(id, body) {
    return http(`/api/customergroup/${id}`, { method: 'PATCH', body });
  },

  /**
   * PUT /api/customergroup/order
   * Body: { customergroupIds: number[] } — must be exactly the company set (same ids, no dups)
   * else 400 Invalid customer group order. Sets sort to each id’s index 0…n-1.
   * → 200 { customergroupIds: number[] }
   */
  order(body) {
    return http('/api/customergroup/order', { method: 'PUT', body });
  },

  /** DELETE /api/customergroup/:id → 204 · 409 Customer group in use */
  delete(id) {
    return http(`/api/customergroup/${id}`, { method: 'DELETE' });
  },
};

/**
 * Company-scoped entities (customers / contacts in a customergroup).
 * Shape: Entity = { id, customergroupId, firstName, name, createdAt, updatedAt }
 */
export const entity = {
  /**
   * GET /api/entity → { entities: Entity[] }
   * Optional query: customergroupId
   */
  list({ customergroupId } = {}) {
    const qs =
      customergroupId != null
        ? `?customergroupId=${encodeURIComponent(customergroupId)}`
        : '';
    return http(`/api/entity${qs}`);
  },

  /** GET /api/entity/:id → { entity: Entity } */
  get(id) {
    return http(`/api/entity/${id}`);
  },

  /**
   * POST /api/entity
   * Body: { customergroupId, name, firstName? }
   * → 201 { entity: Entity }
   */
  create(body) {
    return http('/api/entity', { method: 'POST', body });
  },

  /**
   * PATCH /api/entity/:id
   * Body: { name?, firstName? }
   * → 200 { entity: Entity }
   */
  update(id, body) {
    return http(`/api/entity/${id}`, { method: 'PATCH', body });
  },

  /** DELETE /api/entity/:id → 204 */
  delete(id) {
    return http(`/api/entity/${id}`, { method: 'DELETE' });
  },

  /** GET /api/entity/next-number → { number: string } */
  nextNumber() {
    return http('/api/entity/next-number');
  },

  /** GET /api/entity/:entityId/address → { addresses: EntityAddress[] } */
  listAddresses(entityId) {
    return http(`/api/entity/${entityId}/address`);
  },

  /** POST /api/entity/:entityId/address → 201 { address } */
  createAddress(entityId, body) {
    return http(`/api/entity/${entityId}/address`, { method: 'POST', body });
  },

  /** PATCH /api/entity/:entityId/address/:id → { address } */
  updateAddress(entityId, id, body) {
    return http(`/api/entity/${entityId}/address/${id}`, {
      method: 'PATCH',
      body,
    });
  },

  /** DELETE /api/entity/:entityId/address/:id → 204 */
  deleteAddress(entityId, id) {
    return http(`/api/entity/${entityId}/address/${id}`, { method: 'DELETE' });
  },

  /** GET /api/entity/:entityId/contact → { contacts: EntityContact[] } */
  listContacts(entityId) {
    return http(`/api/entity/${entityId}/contact`);
  },

  /** POST /api/entity/:entityId/contact → 201 { contact } */
  createContact(entityId, body) {
    return http(`/api/entity/${entityId}/contact`, { method: 'POST', body });
  },

  /** PATCH /api/entity/:entityId/contact/:id → { contact } */
  updateContact(entityId, id, body) {
    return http(`/api/entity/${entityId}/contact/${id}`, {
      method: 'PATCH',
      body,
    });
  },

  /** DELETE /api/entity/:entityId/contact/:id → 204 */
  deleteContact(entityId, id) {
    return http(`/api/entity/${entityId}/contact/${id}`, { method: 'DELETE' });
  },
};

export const company = {
  /** GET /api/company → { companies: [...] } */
  list() {
    return http('/api/company');
  },

  /** Uses GET /api/company until a dedicated endpoint exists. */
  async getById(companyId) {
    const data = await http('/api/company');
    const found = data.companies?.find((item) => item.id === companyId);
    if (!found) throw new Error('Unternehmen nicht gefunden.');
    return { company: found };
  },

  create({ name, iso639, taxrate, reducedtaxrate }) {
    return http('/api/company', {
      method: 'POST',
      body: { name, iso639, taxrate, reducedtaxrate },
    });
  },

  /**
   * PUT /api/company/:companyId
   * Body: { name, iso639, taxrate, reducedtaxrate }
   */
  update(companyId, { name, iso639, taxrate, reducedtaxrate }) {
    return http(`/api/company/${companyId}`, {
      method: 'PUT',
      body: { name, iso639, taxrate, reducedtaxrate },
    });
  },

  select(companyId) {
    return http('/api/auth/selected-company', {
      method: 'PUT',
      body: { companyId },
    });
  },

  /**
   * POST /api/company/import
   * Uploads and streams catalog import (.zip) archive via Server-Sent Events.
   * Tracks client upload progress (bytes/percentage) and processes incoming SSE events in real-time.
   *
   * @param {File|Blob|null} file
   * @param {object} [callbacks]
   * @param {(progress: { loaded: number, total: number, percent: number }) => void} [callbacks.onUploadProgress]
   * @param {(message: string) => void} [callbacks.onStatus]
   * @param {(progress: { phase: string, current: number, total: number, item?: string }) => void} [callbacks.onProgress]
   * @param {(stats: object) => void} [callbacks.onDone]
   * @param {(error: string) => void} [callbacks.onError]
   * @param {object} [options]
   * @param {AbortSignal} [options.signal]
   */
  importCatalog(file, callbacks = {}, { signal } = {}) {
    return new Promise((resolve, reject) => {
      const xhr = new XMLHttpRequest();
      xhr.open('POST', '/api/company/import');
      xhr.withCredentials = true;
      xhr.setRequestHeader('Accept', 'text/event-stream');

      if (signal) {
        if (signal.aborted) {
          return reject(new DOMException('Aborted', 'AbortError'));
        }
        signal.addEventListener('abort', () => {
          xhr.abort();
          reject(new DOMException('Aborted', 'AbortError'));
        });
      }

      // Track request body upload progress
      if (file && xhr.upload) {
        xhr.upload.onprogress = (event) => {
          if (event.lengthComputable && event.total > 0) {
            const percent = Math.min(100, Math.round((event.loaded / event.total) * 100));
            callbacks.onUploadProgress?.({
              loaded: event.loaded,
              total: event.total,
              percent,
            });
          }
        };
      }

      // Stream and parse incoming SSE chunks as the server processes the archive
      let processedIndex = 0;
      let buffer = '';

      const processChunks = () => {
        const text = xhr.responseText || '';
        if (text.length <= processedIndex) return;
        const newChunk = text.slice(processedIndex);
        processedIndex = text.length;

        buffer += newChunk;
        const messages = buffer.split('\n\n');
        buffer = messages.pop() || '';

        for (const msg of messages) {
          if (!msg.trim()) continue;

          const eventMatch = msg.match(/^event:\s*(\w+)/m);
          const dataMatch = msg.match(/^data:\s*(.+)$/m);

          const eventType = eventMatch ? eventMatch[1] : 'message';
          let eventData = null;
          if (dataMatch) {
            try {
              eventData = JSON.parse(dataMatch[1]);
            } catch {
              eventData = dataMatch[1];
            }
          }

          switch (eventType) {
            case 'status':
              callbacks.onStatus?.(eventData?.message);
              break;
            case 'progress':
              callbacks.onProgress?.(eventData);
              break;
            case 'done':
              callbacks.onDone?.(eventData?.stats ?? eventData);
              break;
            case 'error':
              callbacks.onError?.(eventData?.message || 'Fehler beim Importieren');
              break;
          }
        }
      };

      xhr.onprogress = processChunks;

      xhr.onload = () => {
        processChunks();
        if (xhr.status >= 200 && xhr.status < 300) {
          resolve();
        } else {
          let errMsg = `Upload fehlgeschlagen (HTTP ${xhr.status})`;
          try {
            const parsed = JSON.parse(xhr.responseText);
            errMsg = parsed.error || parsed.message || errMsg;
          } catch {
            // ignore
          }
          reject(new Error(errMsg));
        }
      };

      xhr.onerror = () => {
        reject(new Error('Netzwerkfehler beim Upload der Datei'));
      };

      xhr.onabort = () => {
        reject(new DOMException('Aborted', 'AbortError'));
      };

      const formData = new FormData();
      if (file) {
        formData.append('file', file);
      }
      xhr.send(formData);
    });
  },
};

export const posterminal = {
  /**
   * GET /api/posterminal → { posterminals: [{ id, name, token, pairingpin }] }
   * List all terminals for the selected company.
   */
  list() {
    return http('/api/posterminal');
  },

  /**
   * PUT /api/posterminal
   * Body: { name: string }
   * Creates a new terminal (auto-generates 6-digit pin).
   * → 200 { posterminal: { id, name, token, pairingpin } }
   */
  create({ name }) {
    return http('/api/posterminal', {
      method: 'PUT',
      body: { name },
    });
  },

  /**
   * PATCH /api/posterminal/:id
   * Body: { name?: string, rootCategoryId?: number|null, syncRootArticles?: boolean, pairingpin?: string }
   * Update posterminal configuration.
   * → 200 { posterminal }
   */
  update(terminalId, patch) {
    return http(`/api/posterminal/${terminalId}`, {
      method: 'PATCH',
      body: patch,
    });
  },

  /**
   * DELETE /api/posterminal/:id → 204
   * Deletes a terminal.
   */
  delete(terminalId) {
    return http(`/api/posterminal/${terminalId}`, {
      method: 'DELETE',
    });
  },

  /**
   * PUT /api/posterminal/:id/category/:categoryId
   * Enable a category on a terminal.
   * → 200 { id: number, categoryIds: number[] }
   */
  enableCategory(terminalId, categoryId) {
    return http(`/api/posterminal/${terminalId}/category/${categoryId}`, {
      method: 'PUT',
    });
  },

  /**
   * DELETE /api/posterminal/:id/category/:categoryId
   * Disable a category on a terminal.
   * → 200 { id: number, categoryIds: number[] }
   */
  disableCategory(terminalId, categoryId) {
    return http(`/api/posterminal/${terminalId}/category/${categoryId}`, {
      method: 'DELETE',
    });
  },

  /**
   * PUT /api/posterminal/:id/all
   * Enable all categories on a terminal.
   * → 200 { id: number, categoryIds: number[] }
   */
  enableAllCategories(terminalId) {
    return http(`/api/posterminal/${terminalId}/all`, {
      method: 'PUT',
    });
  },

  /**
   * DELETE /api/posterminal/:id/all
   * Disable all categories on a terminal.
   * → 200 { id: number, categoryIds: number[] }
   */
  disableAllCategories(terminalId) {
    return http(`/api/posterminal/${terminalId}/all`, {
      method: 'DELETE',
    });
  },
};

export const number = {
  /**
   * GET /api/number → { numbers: [{ id, type, prefix, padding, next }] }
   * Lists the number sequences for the selected company.
   */
  list() {
    return http('/api/number');
  },

  /**
   * PATCH /api/number/:id
   * Body: at least one of { prefix, padding, next } — only present keys are patched.
   * → 200 { number: { id, type, prefix, padding, next } }
   */
  update(id, body) {
    return http(`/api/number/${id}`, { method: 'PATCH', body });
  },
};

export const auth = {
  async me() {
    try {
      const data = await http('/api/auth/me');
      return {
        user: data.user ?? null,
        googleClientId: data.googleClientId ?? null,
      };
    } catch (err) {
      if (err.status === 401 || err.status === 403) {
        return {
          user: null,
          googleClientId: err.data?.googleClientId ?? null,
          forbidden: err.status === 403,
          message: err.message,
        };
      }
      throw err;
    }
  },

  async loginWithGoogle(idToken) {
    logApi('loginWithGoogle', {
      idTokenLength: idToken?.length ?? 0,
      idTokenPrefix: idToken ? `${idToken.slice(0, 12)}…` : null,
    });
    const data = await http('/api/auth/login', {
      method: 'POST',
      body: { idToken },
    });
    // Confirm whether the session cookie actually works (not just login JSON).
    const session = await auth.me();
    logApi('session-after-login', {
      loginUser: data.user?.email ?? data.user?.sub ?? data.user ?? null,
      meUser: session.user?.email ?? session.user?.sub ?? session.user ?? null,
      meForbidden: session.forbidden ?? false,
      meMessage: session.message ?? null,
      sessionOk: Boolean(session.user),
    });
    return { user: data.user, session };
  },

  async logout() {
    try {
      await http('/api/auth/logout', { method: 'POST' });
    } catch (err) {
      if (err.status !== 401) throw err;
    }
  },
};

/**
 * Company-scoped ZPL label templates (selectedCompanyId from session).
 * Shape: LabelTemplate = { id, company_id, name, width, height, dpi, type, content, thumb }
 */
export const labeltemplate = {
  /** GET /api/labeltemplate → { labeltemplates: LabelTemplate[] } */
  list() {
    return http('/api/labeltemplate');
  },

  /** GET /api/labeltemplate/:id → { labeltemplate: LabelTemplate } */
  get(id) {
    return http(`/api/labeltemplate/${encodeURIComponent(id)}`);
  },

  /**
   * POST /api/labeltemplate
   * Body: { name, width, height, dpi, type, content }
   * → 201 { labeltemplate: LabelTemplate }
   */
  create(body) {
    return http('/api/labeltemplate', { method: 'POST', body });
  },

  /**
   * PATCH /api/labeltemplate/:id
   * Body: partial { name?, width?, height?, dpi?, type?, content? }
   * → 200 { labeltemplate: LabelTemplate }
   */
  update(id, body) {
    return http(`/api/labeltemplate/${encodeURIComponent(id)}`, { method: 'PATCH', body });
  },

  /** DELETE /api/labeltemplate/:id → 204 */
  delete(id) {
    return http(`/api/labeltemplate/${encodeURIComponent(id)}`, { method: 'DELETE' });
  },

  // thumb is returned inline as a base64 string in list/get responses
};

export const globalHistory = {
  /**
   * GET /api/history
   * Global system/entity history with paging/sorting/filtering
   */
  list({ startRow, endRow, offset, limit, sortModel, filterModel } = {}) {
    const params = new URLSearchParams();
    if (startRow != null) params.set('startRow', String(startRow));
    if (endRow != null) params.set('endRow', String(endRow));
    if (offset != null) params.set('offset', String(offset));
    if (limit != null) params.set('limit', String(limit));
    if (sortModel && sortModel.length) params.set('sort', JSON.stringify(sortModel));
    if (filterModel && Object.keys(filterModel).length) params.set('filter', JSON.stringify(filterModel));
    const qs = params.toString();
    return http(`/api/history${qs ? `?${qs}` : ''}`);
  },
};

export const modelconversation = {
  /**
   * GET /api/modelconversation
   * Lists the user's model conversations in the selected company.
   * → 200 { conversations: [{ id, companyuser_id, provider, model, created_at, updated_at, state }] }
   */
  list() {
    return http('/api/modelconversation');
  },

  /**
   * GET /api/modelconversation/:id
   * Fetch conversation details by ID.
   * @param {number|string} id
   */
  get(id) {
    return http(`/api/modelconversation/${encodeURIComponent(id)}`);
  },

  /**
   * POST /api/modelconversation
   * Creates a new conversation in state 'idle'.
   * Body: { provider, model }
   * → 201 { conversation: { id, companyuser_id, provider, model, created_at, updated_at, state } }
   */
  create(body) {
    return http('/api/modelconversation', { method: 'POST', body });
  },

  /**
   * GET /api/modelconversation/:id/message
   * Lists conversation messages, oldest first.
   * → 200 { messages: [{ id, conversation_id, created_at, role, message }] }
   */
  listMessages(id) {
    return http(`/api/modelconversation/${encodeURIComponent(id)}/message`);
  },

  addMessage(id, body) {
    return http(`/api/modelconversation/${encodeURIComponent(id)}/message`, { method: 'POST', body });
  },

  /**
   * DELETE /api/modelconversation/:id
   */
  delete(id) {
    return http(`/api/modelconversation/${encodeURIComponent(id)}`, { method: 'DELETE' });
  },
};

export const vfs = {
  /**
   * GET /api/vfs
   * List files in the virtual filesystem for the selected company.
   * → 200 { files: [{ name, size, mime, updated_at, created_at, isText, isImage, isPdf }] }
   */
  list() {
    return http('/api/vfs');
  },

  /**
   * GET /api/vfs/*path
   * Fetch raw content of a file (e.g. text for the editor).
   * @param {string} path
   */
  async getText(path) {
    const clean = String(path || '').replace(/^\/+/, '');
    const res = await fetch(`/api/vfs/${clean}?raw=1`, {
      credentials: 'include',
    });
    if (!res.ok) {
      throw new Error(`Datei konnte nicht geladen werden (${res.status} ${res.statusText})`);
    }
    return res.text();
  },

  /**
   * PUT /api/vfs/*path
   * Create or update a file.
   * @param {string} path
   * @param {string} content
   * @param {string} [mime]
   */
  save(path, content, mime) {
    const clean = String(path || '').replace(/^\/+/, '');
    return http(`/api/vfs/${clean}`, {
      method: 'PUT',
      body: { content, mime },
    });
  },

  /**
   * DELETE /api/vfs/*path
   * Delete a file.
   * @param {string} path
   */
  delete(path) {
    const clean = String(path || '').replace(/^\/+/, '');
    return http(`/api/vfs/${clean}`, {
      method: 'DELETE',
    });
  },

  /**
   * POST /api/vfs/upload
   * Upload multiple files or a single file to VFS.
   * @param {File[]|FileList|File} files
   * @param {string} [targetDir]
   */
  async upload(files, targetDir = '') {
    const formData = new FormData();
    if (targetDir) formData.append('targetDir', targetDir);
    const list = Array.isArray(files) ? files : files instanceof FileList ? Array.from(files) : [files];
    for (const f of list) {
      formData.append('files', f);
    }
    const res = await fetch('/api/vfs/upload', {
      method: 'POST',
      credentials: 'include',
      body: formData,
    });
    if (!res.ok) {
      const err = await res.json().catch(() => ({}));
      throw new Error(err.error || `Upload fehlgeschlagen (${res.status})`);
    }
    return res.json();
  },

  /**
   * POST /api/vfs/mkdir
   * Create a directory in VFS.
   * @param {string} path
   */
  mkdir(path) {
    const clean = String(path || '').replace(/^\/+/, '');
    return http('/api/vfs/mkdir', {
      method: 'POST',
      body: { path: clean },
    });
  },

  /**
   * POST /api/vfs/rename
   * Rename or move a file or directory in VFS.
   * @param {string} oldPath
   * @param {string} newPath
   */
  rename(oldPath, newPath) {
    const cleanOld = String(oldPath || '').replace(/^\/+/, '');
    const cleanNew = String(newPath || '').replace(/^\/+/, '');
    return http('/api/vfs/rename', {
      method: 'POST',
      body: { oldPath: cleanOld, newPath: cleanNew },
    });
  },
};

export default {
  auth,
  article,
  attributename,
  attributevalue,
  brand,
  category,
  company,
  customergroup,
  delivery,
  entity,
  labeltemplate,
  ledger,
  modelconversation,
  number,
  order,
  posterminal,
  printer,
  propertyname,
  quote,
  setting,
  supplier,
  thumb,
  unit,
  vfs,
  warehouse,
  stock,
  globalHistory,
};