import * as React from 'react';
import { IPickerItemProps } from './PickerItem.types';
import { IRefObject, IStyleFunctionOrObject } from '../../Utilities';
import { ISuggestionModel, ISuggestionsProps } from './Suggestions/Suggestions.types';
import { BaseAutoFill } from './AutoFill/BaseAutoFill';
import { ICalloutProps } from '../../Callout';
import { ITheme, IStyle } from '../../Styling';
import { ISuggestionItemProps } from '../pickers/Suggestions/SuggestionsItem.types';
/**
 * BasePicker component.
 * {@docCategory Pickers}
 */
export interface IBasePicker<T> {
    /** Gets the current value of the input. */
    items: T[] | undefined;
    /** Sets focus to the focus zone. */
    focus: () => void;
    /** Set focus to the input */
    focusInput: () => void;
}
/**
 * Type T is the type of the item that is displayed
 * and searched for by the picker. For example, if the picker is
 * displaying persona's then type T could either be of Persona or IPersona props
 * {@docCategory Pickers}
 */
export interface IBasePickerProps<T> extends React.Props<any> {
    /**
     * Optional callback to access the IBasePicker interface. Use this instead of ref for accessing
     * the public methods and properties of the component.
     */
    componentRef?: IRefObject<IBasePicker<T>>;
    /**
     * Function that specifies how the selected item will appear.
     */
    onRenderItem?: (props: IPickerItemProps<T>) => JSX.Element;
    /**
     * Function that specifies how an individual suggestion item will appear.
     */
    onRenderSuggestionsItem?: (props: T, itemProps: ISuggestionItemProps<T>) => JSX.Element;
    /**
     * A callback for what should happen when a person types text into the input.
     * Returns the already selected items so the resolver can filter them out.
     * If used in conjunction with resolveDelay this will ony kick off after the delay throttle.
     */
    onResolveSuggestions: (filter: string, selectedItems?: T[]) => T[] | PromiseLike<T[]>;
    /**
     * The delay time in ms before resolving suggestions, which is kicked off when input has been changed.
     * e.g. If a second input change happens within the resolveDelay time, the timer will start over.
     * Only until after the timer completes will onResolveSuggestions be called.
     */
    resolveDelay?: number;
    /**
     * A callback for what should happen when a user clicks within the input area.
     * @deprecated Please use onEmptyResolveSuggestions instead, as the suggestions aren't about
     * setting focus as they are about resolving suggestions when there is no input.
     */
    onEmptyInputFocus?: (selectedItems?: T[]) => T[] | PromiseLike<T[]>;
    /**
     * A callback for what should happen when suggestions are shown without
     * input provided.
     * Returns the already selected items so the resolver can filter them out.
     * If used in conjunction with resolveDelay this will ony kick off after the delay throttle.
     */
    onEmptyResolveSuggestions?: (selectedItems?: T[]) => T[] | PromiseLike<T[]>;
    /**
     * Initial items that have already been selected and should appear in the people picker.
     */
    defaultSelectedItems?: T[];
    /**
     * A callback for when the selected list of items changes.
     */
    onChange?: (items?: T[]) => void;
    /**
     * A callback for when the user put focus on the picker
     * @deprecated Use `inputProps.onFocus` instead
     */
    onFocus?: React.FocusEventHandler<HTMLInputElement | BaseAutoFill>;
    /**
     * A callback for when the user moves the focus away from the picker
     */
    onBlur?: React.FocusEventHandler<HTMLInputElement | BaseAutoFill>;
    /**
     * A callback to get text from an item. Used to autofill text in the pickers.
     */
    getTextFromItem?: (item: T, currentValue?: string) => string;
    /**
     * A callback that gets the rest of the results when a user clicks get more results.
     */
    onGetMoreResults?: (filter: string, selectedItems?: T[]) => T[] | PromiseLike<T[]>;
    /**
     * ClassName for the picker.
     */
    className?: string;
    /**
     * The properties that will get passed to the Suggestions component.
     */
    pickerSuggestionsProps?: IBasePickerSuggestionsProps;
    /**
     * The properties that will get passed to the Callout component.
     */
    pickerCalloutProps?: ICalloutProps;
    /**
     * AutoFill input native props
     * @defaultvalue undefined
     */
    inputProps?: IInputProps;
    /**
     * A callback for when an item is removed from the suggestion list
     */
    onRemoveSuggestion?: (item: T) => void;
    /**
     * A function used to validate if raw text entered into the well can be added into the selected items list
     */
    onValidateInput?: (input: string) => ValidationState;
    /**
     * The text to display while searching for more results in a limited suggestions list
     */
    searchingText?: ((props: {
        input: string;
    }) => string) | string;
    /**
     * Flag for disabling the picker.
     * @defaultvalue false
     */
    disabled?: boolean;
    /**
     * Restrict the amount of selectable items.
     * @defaultvalue undefined
     */
    itemLimit?: number;
    /**
     * Function that specifies how arbitrary text entered into the well is handled.
     */
    createGenericItem?: (input: string, ValidationState: ValidationState) => ISuggestionModel<T> | T;
    /**
     * Aria label for the "X" button in the selected item component.
     * @defaultvalue ''
     */
    removeButtonAriaLabel?: string;
    /**
     * A callback to process a selection after the user selects something from the picker. If the callback returns null,
     * the item will not be added to the picker.
     */
    onItemSelected?: (selectedItem?: T) => T | PromiseLike<T> | null;
    /**
     * The items that the base picker should currently display as selected.
     * If this is provided then the picker will act as a controlled component.
     */
    selectedItems?: T[];
    /**
     * A callback used to modify the input string.
     */
    onInputChange?: (input: string) => string;
    /**
     * A callback to override the default behavior of adding the selected suggestion on dismiss.
     */
    onDismiss?: (ev?: any, selectedItem?: T) => void;
    /**
     * Adds an additional alert for the currently selected suggestion. This prop should be set to true for IE11 and below, as it
     * enables proper screen reader behavior for each suggestion (since aria-activedescendant does not work with IE11).
     * It should not be set for modern browsers (Edge, Chrome).
     * @defaultvalue false
     */
    enableSelectedSuggestionAlert?: boolean;
    /**
     * Call to provide customized styling that will layer on top of the variant rules.
     */
    styles?: IStyleFunctionOrObject<IBasePickerStyleProps, IBasePickerStyles>;
    /**
     * Theme provided by styled() function.
     */
    theme?: ITheme;
}
/**
 * Subset of picker options that may be legally passed through a picker to its
 * internal Suggestions component.
 * {@docCategory Pickers}
 */
export interface IBasePickerSuggestionsProps<T = any> extends Pick<ISuggestionsProps<T>, 'onRenderNoResultFound' | 'suggestionsHeaderText' | 'mostRecentlyUsedHeaderText' | 'noResultsFoundText' | 'className' | 'suggestionsClassName' | 'suggestionsItemClassName' | 'searchForMoreText' | 'forceResolveText' | 'loadingText' | 'searchingText' | 'resultsFooterFull' | 'resultsFooter' | 'resultsMaximumNumber' | 'showRemoveButtons' | 'suggestionsAvailableAlertText' | 'suggestionsContainerAriaLabel'> {
}
/**
 * Validation state of the user's input.
 * {@docCategory Pickers}
 */
export declare enum ValidationState {
    /** User input is valid. */
    valid = 0,
    /** User input could be valid or invalid, its state is not known yet. */
    warning = 1,
    /** User input is invalid. */
    invalid = 2
}
/**
 * Pickers' input props interface
 * {@docCategory Pickers}
 */
export interface IInputProps extends React.InputHTMLAttributes<HTMLInputElement> {
    /**
     * Screen reader label to apply to an input element.
     */
    'aria-label'?: string;
    /**
     * The default value to be visible when the autofill first created.
     * This is different than placeholder text because the placeholder text will disappear and re-appear. This
     * text persists until deleted or changed.
     */
    defaultVisibleValue?: string;
}
/**
 * The props needed to construct styles.
 * {@docCategory Pickers}
 */
export declare type IBasePickerStyleProps = Pick<IBasePickerProps<any>, 'theme' | 'className' | 'disabled'> & {
    /** Whether text style area is focused */
    isFocused?: boolean;
    /** Optional pickerInput className */
    inputClassName?: string;
};
/**
 * Represents the stylable areas of the control.
 * {@docCategory Pickers}
 */
export interface IBasePickerStyles {
    /** Root element of any picker extending from BasePicker (wraps all the elements). */
    root: IStyle;
    /** Refers to the elements already selected(picked) wrapped by `itemsWrapper` along with the input to type new selection. */
    text: IStyle;
    /** Refers to the items already selected(picked). */
    itemsWrapper: IStyle;
    /** Refers to the input were to type new selections(picks). */
    input: IStyle;
    /** Refers to helper element used for accessibility tools (hidden from view on screen). */
    screenReaderText: IStyle;
}
