import * as mssqlQueries from '../../providers/mssql/queries/optionslist.js';
import * as sqliteQueries from '../../providers/sqlite3/queries/optionslist.js';
import resolveArticleBySku from '../article/resolveArticleBySku.js';
import makeRunner from '../runner.js';

export default function getOptionsByArticleSku(provider) {
  const resolve = resolveArticleBySku(provider);
  const isSqlite = provider?.dialect === 'sqlite3';
  const queries = isSqlite ? sqliteQueries : mssqlQueries;

  /**
   * Returns the options list for an article by its SKU.
   *
   * @param {number} googleAuthId - The id of the Google auth user.
   * @param {string} sku - The article SKU.
   * @param {object} [tx] - Optional transaction.
   * @returns {Promise<Array<{id: number, articleId: number, sku: string, name: string|null, count: number, sort: number, mandated: boolean}>>}
   */
  return async (googleAuthId, sku, tx) => {
    const run = async (runner) => {
      const { articleId, languageId } = await resolve(googleAuthId, sku, runner);

      const artRes = await runner.query(
        'SELECT optionslist_id FROM article WHERE id = @articleId',
        { articleId },
      );
      const optionslistId = artRes.rows[0]?.optionslist_id;
      if (!optionslistId) {
        return [];
      }

      const itemsRes = await runner.query(queries.GET_OPTIONSLIST_ITEMS, {
        optionslistId,
        languageId,
      });

      return itemsRes.rows.map((row) => ({
        id: row.id,
        articleId: row.articleId,
        sku: row.sku,
        name: row.name ?? null,
        count: Number(row.count ?? 1),
        sort: Number(row.sort ?? 0),
        mandated: Boolean(row.mandated),
      }));
    };

    if (tx) {
      return run(makeRunner(provider, tx));
    }
    if (typeof provider?.transaction === 'function') {
      return provider.transaction(run);
    }
    return run(makeRunner(provider));
  };
}