import sql from 'mssql';
import { isDemoMode } from '../demo/mode.js';
import { getDemoCategoryCount } from '../demo/store.js';
import { getPool } from '../db.js';
import { CATEGORY_TREE_CTE, categoryTreeRequest, getRootCategoryId } from './category-tree.js';

const CATEGORY_COUNT_SQL = `
${CATEGORY_TREE_CTE}
SELECT COUNT(*) AS CategoryCount
FROM dbo.tKategorie k
WHERE k.kKategorie IN (SELECT kKategorie FROM CategoryTree)
  AND (@kShop = 0 OR EXISTS (SELECT 1 FROM dbo.tKategorieShop ks WHERE ks.kKategorie = k.kKategorie AND ks.kShop = @kShop))
  AND CONVERT(BIGINT, k.bRowversion) > @cursor;
`;

export async function getCategoryCount({ cursor = 0, rootCategoryId = getRootCategoryId() } = {}) {
  if (isDemoMode()) {
    return getDemoCategoryCount({ cursor });
  }

  const result = await categoryTreeRequest(getPool(), rootCategoryId)
    .input('cursor', sql.BigInt, cursor)
    .query(CATEGORY_COUNT_SQL);
  return result.recordset[0]?.CategoryCount ?? 0;
}