import { DELETE_BY_COMPANY_AND_SI as MSSQL_DELETE } from '../../providers/mssql/queries/unit.js';
import { DELETE_BY_COMPANY_AND_SI as SQLITE_DELETE } from '../../providers/sqlite3/queries/unit.js';
import { isForeignKeyConstraintError } from '../../providers/provider.js';
import resolveSelectedCompanyAccess from '../companyuser/resolveSelectedCompanyAccess.js';
import makeRunner from '../runner.js';

export default function del(provider) {
  const access = resolveSelectedCompanyAccess(provider);
  const sql = provider?.dialect === 'sqlite3' ? SQLITE_DELETE : MSSQL_DELETE;

  /**
   * Deletes a unit for the user's selected company by its SI code.
   *
   * @param {number} googleAuthId - The id of the Google auth user.
   * @param {string} si - The SI code of the unit to delete.
   * @param {object} [tx] - Optional transaction to run within.
   * @returns {Promise<void>}
   * @throws {Error} If the unit is not found.
   *
   * @example
   * await store.unit.delete(42, 'l');
   */
  return async (googleAuthId, si, tx) => {
    if (!si?.trim()) {
      throw new Error('Unit not found');
    }

    const runner = makeRunner(provider, tx);
    const { companyId } = await access(googleAuthId, tx);

    try {
      const result = await runner.query(sql, {
        companyId,
        si: si.trim(),
      });

      if (!result.rowsAffected) {
        throw new Error('Unit not found');
      }
    } catch (err) {
      if (isForeignKeyConstraintError(err)) {
        throw new Error('Unit in use');
      }
      throw err;
    }
  };
}