import { EventEmitter, OnDestroy, OnInit } from '@angular/core';
import { FormControl } from '@angular/forms';
import { ApiVisa, CustomerService, EntityContainerModel } from 'blg-akaun-ts-lib';
import { ReplaySubject, Subject } from 'rxjs';
export declare class SelectCustomerDropDownComponent implements OnInit, OnDestroy {
    private customerService;
    customer: FormControl;
    apiVisa: ApiVisa;
    required: boolean;
    customerChange: EventEmitter<FormControl>;
    customerSelected: EventEmitter<EntityContainerModel>;
    serverSideFiltering: FormControl;
    serverSideSearching: boolean;
    filteredOptions$: ReplaySubject<EntityContainerModel[]>;
    customerList: EntityContainerModel[];
    selectedCustomer: EntityContainerModel;
    protected _onDestroy: Subject<void>;
    constructor(customerService: CustomerService);
    ngOnInit(): void;
    /**
     * Server-side customer typeahead.
     *
     * Replaces the raw SELECT that went through SubQueryService:
     *
     *   FROM bl_fi_mst_entity_ext ext LEFT JOIN bl_fi_mst_entity_hdr hdr
     *   WHERE hdr.status = 'ACTIVE'
     *     AND (ext.param_code IN ('CUSTOMER_CODE','EMP_CUSTOMER_CODE')
     *          OR (ext.param_code = 'AKN_ETY_CTG' AND ext.value_string = 'CUSTOMER'))
     *     AND ((ext.param_code = 'CUSTOMER_CODE' AND ext.value_string ILIKE '%x%')
     *          OR hdr.name ILIKE '%x%')
     *   ORDER BY hdr.name
     *
     * CustomerService points at entity/customers, and EntityController sets
     * is_customer = true from that path segment, so the "is a customer" scoping the
     * ext join expressed is applied by the endpoint. EntityUow's
     * whereClauseCriteriaForSnapshot (the method behind GET entity/customers/query)
     * then applies `search_word` through EntityUowHelper.generateSearchWordCondition
     * -- with is_customer set that ILIKEs hdr.customer_code alongside name, id_no,
     * nickname, descr, phone, email, ... -- and `status` through
     * EntityUowHelper.whereClauseHdr.
     *
     * Behaviour notes:
     * - The keyword now also matches phone/email/id_no/etc., so the typeahead is
     *   broader than the old customer-code/name pair.
     * - Entities recognised as a customer only through the legacy extension rows (a
     *   `CUSTOMER_CODE` / `EMP_CUSTOMER_CODE` row, or `AKN_ETY_CTG = 'CUSTOMER'`)
     *   rather than through hdr.is_customer are kept by the `legacy_entity_category`
     *   criterion, which makes EntityUowHelper.whereClauseHdr OR the same extension
     *   test onto the is_customer condition. Without it those entities would drop out
     *   of the dropdown, because the endpoint derives is_customer from the path.
     *   It costs a correlated subquery per request: once
     *   `entity-category-flag-check.sql` reports a zero gap for every tenant, the flag
     *   is backfilled and this criterion can be dropped.
     * - One request instead of one subquery plus one getByCriteria per hit; the
     *   `catchError` that swallowed per-guid CORS failures is no longer needed
     *   because there is only one request, whose error path the caller handles.
     */
    searchCustomer(searchText: string): import("rxjs").Observable<EntityContainerModel[]>;
    onSelect(entityGuid: string): void;
    ngOnDestroy(): void;
}