/**
 *              Copyright (c) 2025 Visa, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 **/
import { UUIDService } from '../_utilities/services/uuid.service';
import { AccordionHeadingDirective } from '../accordion-heading/accordion-heading.directive';
import { AccordionPanelDirective } from '../accordion-panel/accordion-panel.directive';
import { ButtonDirective } from '../button/button.directive';
import { AccordionDirective } from './accordion.directive';
import * as i0 from "@angular/core";
/**
 * AccordionService is an internal service used to create accordion behavior and is used within the accordion component.
 */
export declare class AccordionService {
    private uuidService;
    constructor(uuidService: UUIDService);
    /** @ignore */
    accordion: AccordionDirective;
    /** @ignore */
    items: {
        heading: AccordionHeadingDirective;
        button: ButtonDirective;
        panel: AccordionPanelDirective;
    }[];
    /** @ignore */
    headings: AccordionHeadingDirective[];
    /** @ignore */
    panels: AccordionPanelDirective[];
    /**
     * The setUpAccordion method sets up the accordion by pairing accordion headings with their respective panels and having them reflect the same expanded state.
     * @param accordion Accordion to set up.
     * @returns void
     */
    setUpAccordion(accordion: AccordionDirective): void;
    /**
     * The setUpPanel method configures a panel with index, expanded state, and assigns an id if not provided.
     * @param index Index of panel to set up.
     * @param expanded Expanded state of panel's associated accordion item.
     */
    setUpPanel(index: number, expanded: boolean): void;
    /**
     * The setUpButton method configures a button with id, aria-controls, aria-expanded attributes, and the appropriate toggle icon.
     * @param buttonHeading Button to set up.
     * @param index Index of button to set up.
     * @param expanded Expanded state of button's associated accordion item.
     */
    setUpButton(buttonHeading: ButtonDirective, index: number, expanded: boolean): void;
    /**
     * The toggleItem method reverses the current state of the accordion. If collapsed, it expands; if expanded, it collapses. If it was collapsed, the function will expand. If it was expanded, the function will collapse.
     * @param index Index of accordion item to toggle.
     */
    toggleItem(index: number): void;
    /**
     * The expandItem method expands the accordion by showing panel content, setting the button’s aria-expanded to true, and changing the toggle icon to expandedIcon.
     * @param index Index of accordion item to expand.
     */
    expandItem(index: number): void;
    /**
     * The collapseItem method collapses the accordion by hiding panel content, setting the button’s aria-expanded to false, and changing the toggle icon to collapsedIcon.
     * @param index Index of accordion item to collapse.
     */
    collapseItem(index: number): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<AccordionService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<AccordionService>;
}