var ViewSwitchWidget;

/**
 * A widget for the footer for the default view, allowing to switch views
 *
 * @class mw.rcfilters.ui.ViewSwitchWidget
 * @extends OO.ui.Widget
 *
 * @constructor
 * @param {mw.rcfilters.Controller} controller Controller
 * @param {mw.rcfilters.dm.FiltersViewModel} model View model
 * @param {Object} [config] Configuration object
 */
ViewSwitchWidget = function MwRcfiltersUiViewSwitchWidget( controller, model, config ) {
	config = config || {};

	// Parent
	ViewSwitchWidget.parent.call( this, config );

	this.controller = controller;
	this.model = model;

	this.buttons = new OO.ui.ButtonGroupWidget( {
		items: [
			new OO.ui.ButtonWidget( {
				data: 'namespaces',
				icon: 'article',
				label: mw.msg( 'namespaces' )
			} ),
			new OO.ui.ButtonWidget( {
				data: 'tags',
				icon: 'tag',
				label: mw.msg( 'rcfilters-view-tags' )
			} )
		]
	} );

	this.buttons.aggregate( { click: 'buttonClick' } );

	// Events
	this.model.connect( this, { update: 'onModelUpdate' } );
	this.buttons.connect( this, { buttonClick: 'onButtonClick' } );

	this.$element
		.addClass( 'mw-rcfilters-ui-viewSwitchWidget' )
		.append(
			new OO.ui.LabelWidget( {
				label: mw.msg( 'rcfilters-advancedfilters' )
			} ).$element,
			$( '<div>' )
				.addClass( 'mw-rcfilters-ui-viewSwitchWidget-buttons' )
				.append( this.buttons.$element )
		);
};

/* Initialize */

OO.inheritClass( ViewSwitchWidget, OO.ui.Widget );

/**
 * Respond to model update event
 */
ViewSwitchWidget.prototype.onModelUpdate = function () {
	var currentView = this.model.getCurrentView();

	this.buttons.getItems().forEach( function ( buttonWidget ) {
		buttonWidget.setActive( buttonWidget.getData() === currentView );
	} );
};

/**
 * Respond to button switch click
 *
 * @param {OO.ui.ButtonWidget} buttonWidget Clicked button
 */
ViewSwitchWidget.prototype.onButtonClick = function ( buttonWidget ) {
	this.controller.switchView( buttonWidget.getData() );
};

module.exports = ViewSwitchWidget;
