/**
 * Copyright Aquera Inc 2023
 *
 * This source code is licensed under the BSD-3-Clause license found in the
 * LICENSE file in the root directory of this source tree.
 */
import '../nile-icon';
import '../nile-popup/nile-popup';
import '../nile-tag/nile-tag';
import NileElement from '../internal/nile-element';
import type { CSSResultGroup, PropertyValues } from 'lit';
import type { NileFormControl } from '../internal/nile-element';
import type NileOption from '../nile-option/nile-option';
import type NilePopup from '../nile-popup/nile-popup';
import type { RenderItemConfig } from '../nile-virtual-select/types.js';
import '../nile-virtual-select/nile-virtual-select';
/**
 * Nile icon component.
 *
 * @tag nile-select
 *
 */
/**
 * @summary Selects allow you to choose items from a menu of predefined options.
 * @status stable
 * @since 2.0
 *
 * @dependency nile-icon
 * @dependency nile-popup
 * @dependency nile-tag
 * @dependency nile-virtual-select
 *
 * @slot - The listbox options. Must be `<nile-option>` elements. You can use `<nile-divider>` to group items visually.
 * @slot label - The input's label. Alternatively, you can use the `label` attribute.
 * @slot prefix - Used to prepend a presentational icon or similar element to the combobox.
 * @slot clear-icon - An icon to use in lieu of the default clear icon.
 * @slot expand-icon - The icon to show when the control is expanded and collapsed. Rotates on open and close.
 * @slot help-text - Text that describes how to use the input. Alternatively, you can use the `help-text` attribute.
 * @slot pre-footer - Content to display at the bottom of the dropdown listbox. Useful for action buttons like "Create New". In multi-select mode, appears above the "Show Selected" / "Clear All" bar.
 *
 * @event nile-change - Emitted when the control's value changes.
 * @event nile-clear - Emitted when the control's value is cleared.
 * @event nile-input - Emitted when the control receives input.
 * @event nile-focus - Emitted when the control gains focus.
 * @event nile-blur - Emitted when the control loses focus.
 * @event nile-show - Emitted when the select's menu opens.
 * @event nile-after-show - Emitted after the select's menu opens and all animations are complete.
 * @event nile-hide - Emitted when the select's menu closes.
 * @event nile-after-hide - Emitted after the select's menu closes and all animations are complete.
 * @event nile-invalid - Emitted when the form control has been checked for validity and its constraints aren't satisfied.
 * @event nile-search - Emitted when the user types in the search input. The event payload includes the search query for backend search functionality.
 * @event nile-scroll - Emitted when the user scrolls within the listbox. The event payload includes scroll position information.
 * @event nile-scroll-start - Emitted when the user starts scrolling within the listbox.
 * @event nile-scroll-end - Emitted when the user stops scrolling and reaches the bottom of the listbox (debounced).
 *
 * @csspart form-control - The form control that wraps the label, input, and help text.
 * @csspart form-control-label - The label's wrapper.
 * @csspart form-control-input - The select's wrapper.
 * @csspart form-control-help-text - The help text's wrapper.
 * @csspart combobox - The container the wraps the prefix, combobox, clear icon, and expand button.
 * @csspart prefix - The container that wraps the prefix slot.
 * @csspart display-input - The element that displays the selected option's label, an `<input>` element.
 * @csspart listbox - The listbox container where options are slotted.
 * @csspart tags - The container that houses option tags when `multiselect` is used.
 * @csspart tag - The individual tags that represent each multiselect option.
 * @csspart tag__base - The tag's base part.
 * @csspart tag__content - The tag's content part.
 * @csspart tag__remove-button - The tag's remove button.
 * @csspart tag__remove-button__base - The tag's remove button base part.
 * @csspart clear-button - The clear button.
 * @csspart expand-icon - The container that wraps the expand icon.
 * @csspart custom-footer - The container that wraps the custom footer slot content.
 * @csspart footer-area - The sticky wrapper around the custom footer and the built-in multi-select footer.
 */
export declare class NileSelect extends NileElement implements NileFormControl {
    static styles: CSSResultGroup;
    private formControlController;
    private virtualScrollHelper;
    private readonly portalManager;
    private readonly hasSlotController;
    private typeToSelectString;
    private typeToSelectTimeout;
    private scrollTimeout;
    private scrolling;
    private options;
    private resizeController?;
    private visibilityManager?;
    popup: NilePopup;
    combobox: HTMLSlotElement;
    displayInput: HTMLInputElement;
    valueInput: HTMLInputElement;
    listbox: HTMLSlotElement;
    private hasFocus;
    displayLabel: string;
    currentOption: NileOption;
    selectedOptions: NileOption[];
    oldValue: string | string[];
    /** The name of the select, submitted as a name/value pair with form data. */
    name: string;
    /**
     * The current value of the select, submitted as a name/value pair with form data. When `multiple` is enabled, the
     * value will be a space-delimited list of values based on the options selected.
     */
    value: string | string[];
    /** The default value of the form control. Primarily used for resetting the form control. */
    defaultValue: string | string[];
    /** The select's size. */
    size: 'small' | 'medium' | 'large';
    /** Placeholder text to show as a hint when the select is empty. */
    placeholder: string;
    /** Placeholder text to show as a hint when the select is empty. */
    searchValue: string;
    searchEnabled: boolean;
    internalSearchPlaceHolder: string;
    enableVisibilityEffect: boolean;
    blockValueChange: boolean;
    disableLocalSearch: boolean;
    optionsLoading: boolean;
    noWidthSync: boolean;
    /**
     * When true, the listbox will be appended to the document body instead of the parent container.
     * This is useful when the parent has overflow: hidden, clip-path, or transform applied.
     */
    portal: boolean;
    /** Allows more than one option to be selected. */
    multiple: boolean | string;
    helpText: string;
    help_text: string;
    autoResize: boolean;
    errorMessage: string;
    /** Sets the input to a warning state, changing its visual appearance. */
    warning: boolean;
    /** Sets the input to an error state, changing its visual appearance. */
    error: boolean;
    /** Sets the input to a success state, changing its visual appearance. */
    success: boolean;
    /**
     * The maximum number of selected options to show when `multiple` is true. After the maximum, "+n" will be shown to
     * indicate the number of additional items that are selected. Set to 0 to remove the limit.
     */
    maxOptionsVisible: number;
    /** Disables the select control. */
    disabled: boolean;
    /** Adds a clear button when the select is not empty. */
    clearable: boolean;
    /**
     * Indicates whether or not the select is open. You can toggle this attribute to show and hide the menu, or you can
     * use the `show()` and `hide()` methods and this attribute will reflect the select's open state.
     */
    open: boolean;
    /**
     * Enable this option to prevent the listbox from being clipped when the component is placed inside a container with
     * `overflow: auto|scroll`. Hoisting uses a fixed positioning strategy that works in many, but not all, scenarios.
     */
    hoist: boolean;
    /** Draws a filled select. */
    filled: boolean;
    /** Draws a pill-style select with rounded edges. */
    pill: boolean;
    /** The select's label. If you need to display HTML, use the `label` slot instead. */
    label: string;
    /**
     * The preferred placement of the select's menu. Note that the actual placement may vary as needed to keep the listbox
     * inside of the viewport.
     */
    placement: 'top' | 'bottom';
    /**
     * By default, form controls are associated with the nearest containing `<form>` element. This attribute allows you
     * to place the form control outside of a form and associate it with the form that has this `id`. The form must be in
     * the same document or shadow root for this to work.
     */
    form: string;
    /** The select's required attribute. */
    required: boolean;
    showSelected: boolean;
    oldMaxOptionsVisible: number;
    enableTabClose: boolean;
    showNoResults: boolean;
    noResultsMessage: string;
    /** Enhanced configuration for rendering items with support for display text, value, and search text */
    renderItemConfig?: RenderItemConfig;
    data: any;
    enableVirtualScroll: boolean;
    /** To enable the group header in the select */
    enableGroupHeader: boolean;
    /** To auto focus the search input when the select is opened */
    autoFocusSearch: boolean;
    /** loading indicator for virtual select */
    loading: boolean;
    stickyHeader: boolean;
    descriptionSearchEnabled: boolean;
    enableDescription: boolean;
    allowHtmlLabel: boolean;
    /** Gets the validity state object */
    get validity(): ValidityState;
    /** Gets the validation message */
    get validationMessage(): string;
    constructor();
    connectedCallback(): void;
    disconnectedCallback(): void;
    private setupResizeObserver;
    protected updated(_changedProperties: PropertyValues): void;
    protected firstUpdated(_changedProperties: PropertyValues): void;
    setCheckBoxInOption(checked: boolean): void;
    setEnableDescriptionInOptions(): void;
    private addOpenListeners;
    private removeOpenListeners;
    private handleFocus;
    private handleBlur;
    private handleDocumentFocusIn;
    private updateGroupStickyOffsets;
    /**
     * Handles the click event on the footer.
     * @param event - The click event.
     */
    private handleFooterClick;
    private handlePreFooterClick;
    /**
     * Toggles the display of selected options in the dropdown
     * @param event - the event object
     */
    toggleShowSelected(event: Event): void;
    /**
     * Deselects all options and updates the value, selectedOptions, and displayLabel properties accordingly
     */
    unSlectAll(): void;
    private handleDocumentKeyDown;
    private handleDocumentMouseDown;
    private handleWindowResize;
    private handleWindowScroll;
    private handleLabelClick;
    private handleComboboxMouseDown;
    private handleComboboxKeyDown;
    private handleClearClick;
    private handleClearMouseDown;
    handleOptionClick(event: MouseEvent): void;
    private applyStickyToGroups;
    private handleDefaultSlotChange;
    private handleTagRemove;
    private getAllOptions;
    private getOptionPrefix;
    private getFirstOption;
    private setCurrentOption;
    private setSelectedOptions;
    private toggleOptionSelection;
    private selectionChanged;
    handleSearchFocus(): void;
    handleSearchBlur(): void;
    handleSearchChange(e: any): void;
    handleScroll(e: Event): void;
    filterOptions(searchValue: string): NileOption[];
    private handleInvalid;
    handleDisabledChange(): void;
    handleValueChange(): void;
    handlePortalAppendChange(): void;
    handleOpenChange(): Promise<void>;
    private getAllGroupAttributes;
    getUniqueGroupNames(arr: NileOption[]): string[];
    handleGroupSearchChange(): void;
    handleGroupShowSelected(): void;
    /** Shows the listbox. */
    show(): Promise<void>;
    /** Hides the listbox. */
    hide(): Promise<void>;
    /** Checks for validity but does not show a validation message. Returns `true` when valid and `false` when invalid. */
    checkValidity(): boolean;
    /** Gets the associated form, if one exists. */
    getForm(): HTMLFormElement | null;
    /** Checks for validity and shows the browser's validation message if the control is invalid. */
    reportValidity(): boolean;
    /** Sets a custom validation message. Pass an empty string to restore validity. */
    setCustomValidity(message: string): void;
    /** Sets focus on the control. */
    focus(options?: FocusOptions): void;
    /** Removes focus from the control. */
    blur(): void;
    onInputChange(event: Event): void;
    calculateWidthOfSelectTagsDiv(): number | undefined;
    calculateTotalWidthOfTags(): void;
    handleInputAfterInit(): void;
    render(): any;
    nileInput(value: any): void;
    nileChange(value: any): void;
}
export default NileSelect;
declare global {
    interface HTMLElementTagNameMap {
        'nile-select': NileSelect;
    }
}