/*!
 * jQuery UI Effects Bounce 1.13.2
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: Bounce Effect
//>>group: Effects
//>>description: Bounces an element horizontally or vertically n times.
//>>docs: http://api.jqueryui.com/bounce-effect/
//>>demos: http://jqueryui.com/effect/

( function( factory ) {
    "use strict";

    if ( typeof define === "function" && define.amd ) {

        // AMD. Register as an anonymous module.
        define( [
            "jquery",
            "../version",
            "../effect"
        ], factory );
    } else {

        // Browser globals
        factory( jQuery );
    }
} )( function( $ ) {
    "use strict";

    return $.effects.define( "bounce", function( options, done ) {
        var upAnim, downAnim, refValue,
            element = $( this ),

            // Defaults:
            mode = options.mode,
            hide = mode === "hide",
            show = mode === "show",
            direction = options.direction || "up",
            distance = options.distance,
            times = options.times || 5,

            // Number of internal animations
            anims = times * 2 + ( show || hide ? 1 : 0 ),
            speed = options.duration / anims,
            easing = options.easing,

            // Utility:
            ref = ( direction === "up" || direction === "down" ) ? "top" : "left",
            motion = ( direction === "up" || direction === "left" ),
            i = 0,

            queuelen = element.queue().length;

        $.effects.createPlaceholder( element );

        refValue = element.css( ref );

        // Default distance for the BIGGEST bounce is the outer Distance / 3
        if ( !distance ) {
            distance = element[ ref === "top" ? "outerHeight" : "outerWidth" ]() / 3;
        }

        if ( show ) {
            downAnim = { opacity: 1 };
            downAnim[ ref ] = refValue;

            // If we are showing, force opacity 0 and set the initial position
            // then do the "first" animation
            element
                .css( "opacity", 0 )
                .css( ref, motion ? -distance * 2 : distance * 2 )
                .animate( downAnim, speed, easing );
        }

        // Start at the smallest distance if we are hiding
        if ( hide ) {
            distance = distance / Math.pow( 2, times - 1 );
        }

        downAnim = {};
        downAnim[ ref ] = refValue;

        // Bounces up/down/left/right then back to 0 -- times * 2 animations happen here
        for ( ; i < times; i++ ) {
            upAnim = {};
            upAnim[ ref ] = ( motion ? "-=" : "+=" ) + distance;

            element
                .animate( upAnim, speed, easing )
                .animate( downAnim, speed, easing );

            distance = hide ? distance * 2 : distance / 2;
        }

        // Last Bounce when Hiding
        if ( hide ) {
            upAnim = { opacity: 0 };
            upAnim[ ref ] = ( motion ? "-=" : "+=" ) + distance;

            element.animate( upAnim, speed, easing );
        }

        element.queue( done );

        $.effects.unshift( element, queuelen, anims + 1 );
    } );

} );