import { http, clientIdHeaders } from './http.js';

/**
 * 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
   * @param {{ offset?: number, limit?: number, search?: string, onlyUnbooked?: boolean, supplierId?: number, seekMonths?: number }} [opts]
   * → { deliveries: DeliverySummary[], total?: number, unfilteredTotal?: number, offset?: number, limit?: number }
   */
  // #region GET /api/delivery — list
  list(opts) {
    if (opts && typeof opts === 'object') {
      const params = new URLSearchParams();
      if (opts.offset != null) params.set('offset', String(Math.max(0, Math.floor(Number(opts.offset) || 0))));
      if (opts.limit != null) params.set('limit', String(Math.max(1, Math.floor(Number(opts.limit) || 50))));
      if (opts.search && String(opts.search).trim()) params.set('search', String(opts.search).trim());
      if (opts.onlyUnbooked === true || opts.onlyUnbooked === 'true') params.set('onlyUnbooked', 'true');
      if (opts.supplierId != null) params.set('supplierId', String(opts.supplierId));
      if (opts.seekMonths != null && Number(opts.seekMonths) < 0) {
        params.set('seekMonths', String(Math.floor(Number(opts.seekMonths))));
      }
      const qs = params.toString();
      return http(`/api/delivery${qs ? `?${qs}` : ''}`);
    }
    return http('/api/delivery');
  },
  // #endregion

  /** POST /api/delivery/rebuild-summaries → { ok: boolean, companyId: number } */
  rebuildSummaries() {
    return http('/api/delivery/rebuild-summaries', { method: 'POST' });
  },

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

  /**
   * 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 }
   */
  // #region POST /api/delivery — create
  create(body) {
    return http('/api/delivery', { method: 'POST', body });
  },
  // #endregion

  /**
   * 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 }
   */
  // #region PATCH /api/delivery/:id — update
  update(id, body) {
    return http(`/api/delivery/${id}`, { method: 'PATCH', body });
  },
  // #endregion

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

  /**
   * GET /api/delivery/:id/file/:fileId → Blob
   * Full binary content of attached file (PDF, text, etc.)
   */
  // #region GET /api/delivery/:id/file/:fileId — getFile
  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();
  },
  // #endregion

  /**
   * DELETE /api/delivery/:id/file/:fileId
   * Deletes delivery file attachment.
   * @param {number|string} id Delivery ID
   * @param {number|string} fileId File ID
   * → 204 void
   */
  // #region DELETE /api/delivery/:id/file/:fileId — deleteFile
  deleteFile(id, fileId) {
    return http(`/api/delivery/${id}/file/${fileId}`, { method: 'DELETE' });
  },
  // #endregion
};