import { type mssql, connect } from '@cityssm/mssql-multi-pool'

import type { GPCustomer } from './types.js'

/**
 * Retrieves a GP customer by their customer number.
 * @param mssqlConfig - The configuration for the SQL Server connection.
 * @param customerNumber - The customer number to look up.
 * @returns A promise that resolves to the GP customer, or undefined if not found.
 */
export default async function _getCustomerByCustomerNumber(
  mssqlConfig: mssql.config,
  customerNumber: string
): Promise<GPCustomer | undefined> {
  const pool = await connect(mssqlConfig)

  const customerResult = await pool
    .request()
    .input('customerNumber', customerNumber)
    .query<GPCustomer>(/* sql */ `
      SELECT
        TOP 1 rtrim(CUSTNMBR) AS customerNumber,
        rtrim(CUSTNAME) AS customerName,
        rtrim(CUSTCLAS) AS customerClass,
        rtrim(CNTCPRSN) AS contactPerson,
        rtrim(STMTNAME) AS statementName,
        rtrim(SHRTNAME) AS shortName,
        rtrim(ADDRESS1) AS address1,
        rtrim(ADDRESS2) AS address2,
        rtrim(ADDRESS3) AS address3,
        rtrim(CITY) AS city,
        rtrim(STATE) AS state,
        rtrim(COUNTRY) AS country,
        rtrim(ZIP) AS zipCode,
        rtrim(PHONE1) AS phoneNumber1,
        rtrim(PHONE2) AS phoneNumber2,
        rtrim(PHONE3) AS phoneNumber3,
        rtrim(FAX) AS faxNumber,
        CREATDDT AS dateCreated,
        MODIFDT AS dateModified
      FROM
        RM00101
      WHERE
        CUSTNMBR = @customerNumber
    `)

  return customerResult.recordset.length > 0
    ? customerResult.recordset[0]
    : undefined
}