/**
 * Contains the SegmentedBar class, which represents a SegmentedBar component.
 */
import {
    ViewBase, View, AddChildFromBuilder, AddArrayFromBuilder,
    Property, CoercibleProperty, EventData, Color
} from "../core/view";

/**
 * Represents a SegmentedBar item.
 */
export class SegmentedBarItem extends ViewBase {
    /**
     * Gets or sets the title of the SegmentedBarItem.
     */
    public title: string;
}

/**
 * Defines the data for the SegmentedBar.selectedIndexChanged event.
 */
export interface SelectedIndexChangedEventData extends EventData {
    /**
     * The old selected index.
     */
    oldIndex: number;

    /**
     * The new selected index.
     */
    newIndex: number;
}

/**
 * Represents a UI SegmentedBar component.
 */
export class SegmentedBar extends View implements AddChildFromBuilder, AddArrayFromBuilder {
    /**
     * Gets or sets the selected index of the SegmentedBar component.
     */
    selectedIndex: number;

    /**
     * Gets or sets the selected background color of the SegmentedBar component.
     */
    selectedBackgroundColor: Color;

    /**
     * Gets or sets the items of the SegmentedBar.
     */
    items: Array<SegmentedBarItem>;

    /**
     * String value used when hooking to the selectedIndexChanged event.
     */
    public static selectedIndexChangedEvent: string;

    /**
     * A basic method signature to hook an event listener (shortcut alias to the addEventListener method).
     * @param eventNames - String corresponding to events (e.g. "propertyChange"). Optionally could be used more events separated by `,` (e.g. "propertyChange", "change"). 
     * @param callback - Callback function which will be executed when event is raised.
     * @param thisArg - An optional parameter which will be used as `this` context for callback execution.
     */
    on(eventNames: string, callback: (data: EventData) => void, thisArg?: any);

    /**
     * Raised when the selected index changes.
     */
    on(event: "selectedIndexChanged", callback: (args: SelectedIndexChangedEventData) => void, thisArg?: any);

    /**
     * Called for every child element declared in xml.
     * @param name - Name of the element.
     * @param value - Value of the element.
     */
    public _addChildFromBuilder(name: string, value: any): void;
    public _addArrayFromBuilder(name: string, value: Array<any>): void;
}

/**
 * Gets or sets the selected index dependency property of the SegmentedBar.
 */
export const selectedIndexProperty: CoercibleProperty<SegmentedBar, number>;

/**
 * Gets or sets the selected background color property of the SegmentedBar.
 */
export const selectedBackgroundColorProperty: Property<SegmentedBar, Color>;

/**
 * Gets or sets the items dependency property of the SegmentedBar.
 */
export const itemsProperty: Property<SegmentedBar, SegmentedBarItem[]>;
