import {
  DELETE_BY_ID_AND_ARTICLE_ID,
  DELETE_PRICE,
  GET_BY_ID_AND_ARTICLE_ID,
} from '../../providers/mssql/queries/articlesupplier.js';
import request from '../request.js';
import resolveArticleBySku from '../article/resolveArticleBySku.js';

export default function del(pool) {
  const resolve = resolveArticleBySku(pool);

  /**
   * Deletes a supplier assignment and cleans up its associated purchase price.
   *
   * @param {number} googleAuthId - The id of the Google auth user.
   * @param {string} sku - The article SKU.
   * @param {number} id - The id of the articlesupplier record.
   * @returns {Promise<void>}
   * @throws {Error} If the supplier assignment is not found.
   *
   * @example
   * await store.articlesupplier.delete(42, 'SKU-1', 12);
   */
  return async (googleAuthId, sku, id) => {
    if (id == null || !Number.isFinite(id)) {
      throw new Error('Supplier assignment not found');
    }

    const { articleId, companyId } = await resolve(googleAuthId, sku);

    const existingRes = await pool
      .request()
      .input('id', id)
      .input('articleId', articleId)
      .input('companyId', companyId)
      .query(GET_BY_ID_AND_ARTICLE_ID);

    const existing = existingRes.recordset[0];
    if (!existing) {
      throw new Error('Supplier assignment not found');
    }

    const tx = pool.transaction();
    await tx.begin();

    try {
      await request(pool, tx)
        .input('id', id)
        .input('articleId', articleId)
        .query(DELETE_BY_ID_AND_ARTICLE_ID);

      if (existing.priceId != null) {
        await request(pool, tx)
          .input('id', existing.priceId)
          .input('articleId', articleId)
          .query(DELETE_PRICE);
      }

      await tx.commit();
    } catch (err) {
      try {
        await tx.rollback();
      } catch {
        // ignore
      }
      throw err;
    }
  };
}