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

/**
 * 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 = {

  /**
   * GET /api/ledger/history?offset=0&limit=50&search=...&seekMonths=-1
   * Append-only ledger audit history with chunk paging, search, and seek filtering
   * @param {{ offset?: number, limit?: number, search?: string, seekMonths?: number, sortModel?: Array, filterModel?: object, sku?: string, transactionType?: string }} [params]
   * → { ledger: LedgerEntry[], history?: LedgerEntry[], total: number, unfilteredTotal?: number }
   */
  // #region GET /api/ledger/history — getHistory
  getHistory({ offset = 0, limit = 50, search, seekMonths, sortModel, filterModel, sku, transactionType } = {}) {
    const params = new URLSearchParams();
    params.set('offset', String(Math.max(0, Math.floor(Number(offset) || 0))));
    params.set('limit', String(Math.max(1, Math.floor(Number(limit) || 50))));
    if (search && String(search).trim()) params.set('search', String(search).trim());
    if (seekMonths != null && Number(seekMonths) < 0) {
      params.set('seekMonths', String(Math.floor(Number(seekMonths))));
    }
    if (sku != null) params.set('sku', String(sku));
    if (transactionType != null) params.set('transaction_type', String(transactionType));
    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/ledger/history${qs ? `?${qs}` : ''}`);
  },
  // #endregion

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


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