/*!
 * jQuery UI Effects Blind - v1.10.4
 * http://jqueryui.com
 *
 * Copyright 2014 jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 *
 * http://api.jqueryui.com/blind-effect/
 */

define([
    'jquery',
    'jquery-ui-modules/effect'
], function ($, undefined) {

    var rvertical = /up|down|vertical/,
        rpositivemotion = /up|left|vertical|horizontal/;

    $.effects.effect.blind = function (o, done) {
        // Create element
        var el = $(this),
            props = ["position", "top", "bottom", "left", "right", "height", "width"],
            mode = $.effects.setMode(el, o.mode || "hide"),
            direction = o.direction || "up",
            vertical = rvertical.test(direction),
            ref = vertical ? "height" : "width",
            ref2 = vertical ? "top" : "left",
            motion = rpositivemotion.test(direction),
            animation = {},
            show = mode === "show",
            wrapper, distance, margin;

        // if already wrapped, the wrapper's properties are my property. #6245
        if (el.parent().is(".ui-effects-wrapper")) {
            $.effects.save(el.parent(), props);
        } else {
            $.effects.save(el, props);
        }
        el.show();
        wrapper = $.effects.createWrapper(el).css({
            overflow: "hidden"
        });

        distance = wrapper[ref]();
        margin = parseFloat(wrapper.css(ref2)) || 0;

        animation[ref] = show ? distance : 0;
        if (!motion) {
            el
                .css(vertical ? "bottom" : "right", 0)
                .css(vertical ? "top" : "left", "auto")
                .css({position: "absolute"});

            animation[ref2] = show ? margin : distance + margin;
        }

        // start at 0 if we are showing
        if (show) {
            wrapper.css(ref, 0);
            if (!motion) {
                wrapper.css(ref2, margin + distance);
            }
        }

        // Animate
        wrapper.animate(animation, {
            duration: o.duration,
            easing: o.easing,
            queue: false,
            complete: function () {
                if (mode === "hide") {
                    el.hide();
                }
                $.effects.restore(el, props);
                $.effects.removeWrapper(el);
                done();
            }
        });

    };

});