( function ( $, mw ) {
	/**
	 * Check whether the Navigation Popups gadget module is enabled
	 *
	 * @return {boolean}
	 */
	function isNavigationPopupsGadgetEnabled() {
		// Temporary fix to get this code working on huwiki
		var moduleName = mw.config.get( 'wgPageContentLanguage' ) === 'hu' ?
				'ext.gadget.latszer' : 'ext.gadget.Navigation_popups',
			moduleState = mw.loader.getState( moduleName );

		// Does the module exist and is it being used?
		return ( moduleState !== null && moduleState !== 'registered' ) ||
			window.pg !== undefined;
	}

	mw.popups.enabled = mw.popups.getEnabledState();

	/**
	 * Returns valid jQuery selectors for which a popup should be triggered.
	 * This can be overwritten by targets.
	 *
	 * @return string
	 */
	mw.popups.triggers = 'mouseenter focus';

	/**
	 * Creates the SVG mask used to create the
	 * the triangle pointer on popups with images
	 *
	 * @method createSVGMask
	 */
	mw.popups.createSVGMask = function () {
		$( '<div>' )
			.attr( 'id', 'mwe-popups-svg' )
			.appendTo( document.body )
			.html(
				'<svg width="0" height="0">' +
					'<defs>' +
						'<clippath id="mwe-popups-mask">' +
							'<polygon points="0 8, 10 8, 18 0, 26 8, 1000 8, 1000 1000, 0 1000"/>' +
						'</clippath>' +
						'<clippath id="mwe-popups-mask-flip">' +
							'<polygon points="0 8, 274 8, 282 0, 290 8, 1000 8, 1000 1000, 0 1000"/>' +
						'</clippath>' +
						'<clippath id="mwe-popups-landscape-mask">' +
							'<polygon points="0 8, 174 8, 182 0, 190 8, 1000 8, 1000 1000, 0 1000"/>' +
						'</clippath>' +
						'<clippath id="mwe-popups-landscape-mask-flip">' +
							'<polygon points="0 0, 1000 0, 1000 243, 190 243, 182 250, 174 243, 0 243"/>' +
						'</clippath>' +
					'</defs>' +
				'</svg>'
			);
		return true;
	};

	/**
	 * Create the element that holds the popups
	 *
	 * @method createPopupElement
	 */
	mw.popups.createPopupElement = function () {
		mw.popups.$popup = $( '<div>' )
			.attr( {
				'class': 'mwe-popups',
				role: 'tooltip',
				'aria-hidden': 'true'
			} )
			.appendTo( document.body );
	};

	/**
	 * Checks if the user is scrolling, sets to false on mousemove
	 *
	 * @method checkScroll
	 */
	mw.popups.checkScroll = function () {
		$( window ).on( 'scroll', function () {
			mw.popups.scrolled = true;
		} );

		$( window ).on( 'mousemove', function () {
			mw.popups.scrolled = false;
		} );
	};

	mw.hook( 'wikipage.content' ).add( function ( $content ) {
		var $elements, dwellStartTime, linkInteractionToken;

		mw.popups.$content = $content;
		$elements = mw.popups.selectPopupElements();

		// Only enable Popups when the Navigation popups gadget is not enabled
		if ( !isNavigationPopupsGadgetEnabled() && mw.popups.enabled ) {
			mw.popups.removeTooltips( $elements );
			mw.popups.setupTriggers( $elements );
		} else {
			// Events are logged even when Hovercards are disabled
			// See T88166 for details
			$elements
				.on( mw.popups.triggers, function () {
					// cache the hover start time and link interaction token for a later use
					dwellStartTime = mw.now();
					linkInteractionToken = mw.popups.getRandomToken();
				} )
				.on( 'mouseleave blur', function () {
					var $this = $( this );

					if ( dwellStartTime && linkInteractionToken && mw.now() - dwellStartTime >= 250 ) {
						mw.track( 'ext.popups.schemaPopups', {
							pageTitleHover: $this.attr( 'title' ),
							action: 'dwelledButAbandoned',
							totalInteractionTime: Math.round( mw.now() - dwellStartTime ),
							linkInteractionToken: linkInteractionToken
						} );
					}
				} )
				.on( 'click', function ( event ) {
					var $this = $( this ),
						action = mw.popups.getAction( event ),
						href = $this.attr( 'href' );

					mw.track( 'ext.popups.schemaPopups', {
						pageTitleHover: $this.attr( 'title' ),
						action: action,
						totalInteractionTime: Math.round( mw.now() - dwellStartTime ),
						linkInteractionToken: linkInteractionToken
					} );

					if ( action  === 'opened in same tab' ) {
						event.preventDefault();
						window.location.href = href;
					}
				} );
		}
	} );

	function initPopups() {
		mw.popups.checkScroll();
		mw.popups.createSVGMask();
		mw.popups.createPopupElement();
	}

	$( function () {
		var jStorage = mw.storage.get( 'jStorage' );

		// FIXME: Can be removed a month from jStorage removal. Not perfect but should work in most cases.
		if ( jStorage && jStorage.indexOf( 'popups-enabled' ) > 0 ) {
			// slower loading popups when in transition mode
			mw.loader.using( 'jquery.jStorage' ).done( function () {
				var val = $.jStorage.get( 'mwe-popups-enabled' );
				// delete jStorage key
				$.jStorage.deleteKey( 'mwe-popups-enabled' );
				if ( val === 'false' ) {
					// copy over
					mw.storage.set( 'mwe-popups-enabled', '0' );
				} else {
					if ( val ) {
						mw.storage.set( 'mwe-popups-enabled', '1' );
					}
					initPopups();
				}
			} );
		} else if ( mw.popups.enabled ) {
			initPopups();
		}

		mw.track( 'ext.popups.schemaPopups', {
			action: 'pageLoaded'
		} );
	} );
} )( jQuery, mediaWiki );