/*!
 * jQuery UI Spinner - 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/spinner/
 */

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

    function modifier(fn) {
        return function () {
            var previous = this.element.val();
            fn.apply(this, arguments);
            this._refresh();
            if (previous !== this.element.val()) {
                this._trigger("change");
            }
        };
    }

    $.widget("ui.spinner", {
        version: "1.10.4",
        defaultElement: "<input>",
        widgetEventPrefix: "spin",
        options: {
            culture: null,
            icons: {
                down: "ui-icon-triangle-1-s",
                up: "ui-icon-triangle-1-n"
            },
            incremental: true,
            max: null,
            min: null,
            numberFormat: null,
            page: 10,
            step: 1,

            change: null,
            spin: null,
            start: null,
            stop: null
        },

        _create: function () {
            // handle string values that need to be parsed
            this._setOption("max", this.options.max);
            this._setOption("min", this.options.min);
            this._setOption("step", this.options.step);

            // Only format if there is a value, prevents the field from being marked
            // as invalid in Firefox, see #9573.
            if (this.value() !== "") {
                // Format the value, but don't constrain.
                this._value(this.element.val(), true);
            }

            this._draw();
            this._on(this._events);
            this._refresh();

            // turning off autocomplete prevents the browser from remembering the
            // value when navigating through history, so we re-enable autocomplete
            // if the page is unloaded before the widget is destroyed. #7790
            this._on(this.window, {
                beforeunload: function () {
                    this.element.removeAttr("autocomplete");
                }
            });
        },

        _getCreateOptions: function () {
            var options = {},
                element = this.element;

            $.each(["min", "max", "step"], function (i, option) {
                var value = element.attr(option);
                if (value !== undefined && value.length) {
                    options[option] = value;
                }
            });

            return options;
        },

        _events: {
            keydown: function (event) {
                if (this._start(event) && this._keydown(event)) {
                    event.preventDefault();
                }
            },
            keyup: "_stop",
            focus: function () {
                this.previous = this.element.val();
            },
            blur: function (event) {
                if (this.cancelBlur) {
                    delete this.cancelBlur;
                    return;
                }

                this._stop();
                this._refresh();
                if (this.previous !== this.element.val()) {
                    this._trigger("change", event);
                }
            },
            mousewheel: function (event, delta) {
                if (!delta) {
                    return;
                }
                if (!this.spinning && !this._start(event)) {
                    return false;
                }

                this._spin((delta > 0 ? 1 : -1) * this.options.step, event);
                clearTimeout(this.mousewheelTimer);
                this.mousewheelTimer = this._delay(function () {
                    if (this.spinning) {
                        this._stop(event);
                    }
                }, 100);
                event.preventDefault();
            },
            "mousedown .ui-spinner-button": function (event) {
                var previous;

                // We never want the buttons to have focus; whenever the user is
                // interacting with the spinner, the focus should be on the input.
                // If the input is focused then this.previous is properly set from
                // when the input first received focus. If the input is not focused
                // then we need to set this.previous based on the value before spinning.
                previous = this.element[0] === this.document[0].activeElement ?
                    this.previous : this.element.val();

                function checkFocus() {
                    var isActive = this.element[0] === this.document[0].activeElement;
                    if (!isActive) {
                        this.element.focus();
                        this.previous = previous;
                        // support: IE
                        // IE sets focus asynchronously, so we need to check if focus
                        // moved off of the input because the user clicked on the button.
                        this._delay(function () {
                            this.previous = previous;
                        });
                    }
                }

                // ensure focus is on (or stays on) the text field
                event.preventDefault();
                checkFocus.call(this);

                // support: IE
                // IE doesn't prevent moving focus even with event.preventDefault()
                // so we set a flag to know when we should ignore the blur event
                // and check (again) if focus moved off of the input.
                this.cancelBlur = true;
                this._delay(function () {
                    delete this.cancelBlur;
                    checkFocus.call(this);
                });

                if (this._start(event) === false) {
                    return;
                }

                this._repeat(null, $(event.currentTarget).hasClass("ui-spinner-up") ? 1 : -1, event);
            },
            "mouseup .ui-spinner-button": "_stop",
            "mouseenter .ui-spinner-button": function (event) {
                // button will add ui-state-active if mouse was down while mouseleave and kept down
                if (!$(event.currentTarget).hasClass("ui-state-active")) {
                    return;
                }

                if (this._start(event) === false) {
                    return false;
                }
                this._repeat(null, $(event.currentTarget).hasClass("ui-spinner-up") ? 1 : -1, event);
            },
            // TODO: do we really want to consider this a stop?
            // shouldn't we just stop the repeater and wait until mouseup before
            // we trigger the stop event?
            "mouseleave .ui-spinner-button": "_stop"
        },

        _draw: function () {
            var uiSpinner = this.uiSpinner = this.element
                .addClass("ui-spinner-input")
                .attr("autocomplete", "off")
                .wrap(this._uiSpinnerHtml())
                .parent()
                // add buttons
                .append(this._buttonHtml());

            this.element.attr("role", "spinbutton");

            // button bindings
            this.buttons = uiSpinner.find(".ui-spinner-button")
                .attr("tabIndex", -1)
                .button()
                .removeClass("ui-corner-all");

            // IE 6 doesn't understand height: 50% for the buttons
            // unless the wrapper has an explicit height
            if (this.buttons.height() > Math.ceil(uiSpinner.height() * 0.5) &&
                uiSpinner.height() > 0) {
                uiSpinner.height(uiSpinner.height());
            }

            // disable spinner if element was already disabled
            if (this.options.disabled) {
                this.disable();
            }
        },

        _keydown: function (event) {
            var options = this.options,
                keyCode = $.ui.keyCode;

            switch (event.keyCode) {
                case keyCode.UP:
                    this._repeat(null, 1, event);
                    return true;
                case keyCode.DOWN:
                    this._repeat(null, -1, event);
                    return true;
                case keyCode.PAGE_UP:
                    this._repeat(null, options.page, event);
                    return true;
                case keyCode.PAGE_DOWN:
                    this._repeat(null, -options.page, event);
                    return true;
            }

            return false;
        },

        _uiSpinnerHtml: function () {
            return "<span class='ui-spinner ui-widget ui-widget-content ui-corner-all'></span>";
        },

        _buttonHtml: function () {
            return "" +
                "<a class='ui-spinner-button ui-spinner-up ui-corner-tr'>" +
                "<span class='ui-icon " + this.options.icons.up + "'>&#9650;</span>" +
                "</a>" +
                "<a class='ui-spinner-button ui-spinner-down ui-corner-br'>" +
                "<span class='ui-icon " + this.options.icons.down + "'>&#9660;</span>" +
                "</a>";
        },

        _start: function (event) {
            if (!this.spinning && this._trigger("start", event) === false) {
                return false;
            }

            if (!this.counter) {
                this.counter = 1;
            }
            this.spinning = true;
            return true;
        },

        _repeat: function (i, steps, event) {
            i = i || 500;

            clearTimeout(this.timer);
            this.timer = this._delay(function () {
                this._repeat(40, steps, event);
            }, i);

            this._spin(steps * this.options.step, event);
        },

        _spin: function (step, event) {
            var value = this.value() || 0;

            if (!this.counter) {
                this.counter = 1;
            }

            value = this._adjustValue(value + step * this._increment(this.counter));

            if (!this.spinning || this._trigger("spin", event, {value: value}) !== false) {
                this._value(value);
                this.counter++;
            }
        },

        _increment: function (i) {
            var incremental = this.options.incremental;

            if (incremental) {
                return $.isFunction(incremental) ?
                    incremental(i) :
                    Math.floor(i * i * i / 50000 - i * i / 500 + 17 * i / 200 + 1);
            }

            return 1;
        },

        _precision: function () {
            var precision = this._precisionOf(this.options.step);
            if (this.options.min !== null) {
                precision = Math.max(precision, this._precisionOf(this.options.min));
            }
            return precision;
        },

        _precisionOf: function (num) {
            var str = num.toString(),
                decimal = str.indexOf(".");
            return decimal === -1 ? 0 : str.length - decimal - 1;
        },

        _adjustValue: function (value) {
            var base, aboveMin,
                options = this.options;

            // make sure we're at a valid step
            // - find out where we are relative to the base (min or 0)
            base = options.min !== null ? options.min : 0;
            aboveMin = value - base;
            // - round to the nearest step
            aboveMin = Math.round(aboveMin / options.step) * options.step;
            // - rounding is based on 0, so adjust back to our base
            value = base + aboveMin;

            // fix precision from bad JS floating point math
            value = parseFloat(value.toFixed(this._precision()));

            // clamp the value
            if (options.max !== null && value > options.max) {
                return options.max;
            }
            if (options.min !== null && value < options.min) {
                return options.min;
            }

            return value;
        },

        _stop: function (event) {
            if (!this.spinning) {
                return;
            }

            clearTimeout(this.timer);
            clearTimeout(this.mousewheelTimer);
            this.counter = 0;
            this.spinning = false;
            this._trigger("stop", event);
        },

        _setOption: function (key, value) {
            if (key === "culture" || key === "numberFormat") {
                var prevValue = this._parse(this.element.val());
                this.options[key] = value;
                this.element.val(this._format(prevValue));
                return;
            }

            if (key === "max" || key === "min" || key === "step") {
                if (typeof value === "string") {
                    value = this._parse(value);
                }
            }
            if (key === "icons") {
                this.buttons.first().find(".ui-icon")
                    .removeClass(this.options.icons.up)
                    .addClass(value.up);
                this.buttons.last().find(".ui-icon")
                    .removeClass(this.options.icons.down)
                    .addClass(value.down);
            }

            this._super(key, value);

            if (key === "disabled") {
                if (value) {
                    this.element.prop("disabled", true);
                    this.buttons.button("disable");
                } else {
                    this.element.prop("disabled", false);
                    this.buttons.button("enable");
                }
            }
        },

        _setOptions: modifier(function (options) {
            this._super(options);
            this._value(this.element.val());
        }),

        _parse: function (val) {
            if (typeof val === "string" && val !== "") {
                val = window.Globalize && this.options.numberFormat ?
                    Globalize.parseFloat(val, 10, this.options.culture) : +val;
            }
            return val === "" || isNaN(val) ? null : val;
        },

        _format: function (value) {
            if (value === "") {
                return "";
            }
            return window.Globalize && this.options.numberFormat ?
                Globalize.format(value, this.options.numberFormat, this.options.culture) :
                value;
        },

        _refresh: function () {
            this.element.attr({
                "aria-valuemin": this.options.min,
                "aria-valuemax": this.options.max,
                // TODO: what should we do with values that can't be parsed?
                "aria-valuenow": this._parse(this.element.val())
            });
        },

        // update the value without triggering change
        _value: function (value, allowAny) {
            var parsed;
            if (value !== "") {
                parsed = this._parse(value);
                if (parsed !== null) {
                    if (!allowAny) {
                        parsed = this._adjustValue(parsed);
                    }
                    value = this._format(parsed);
                }
            }
            this.element.val(value);
            this._refresh();
        },

        _destroy: function () {
            this.element
                .removeClass("ui-spinner-input")
                .prop("disabled", false)
                .removeAttr("autocomplete")
                .removeAttr("role")
                .removeAttr("aria-valuemin")
                .removeAttr("aria-valuemax")
                .removeAttr("aria-valuenow");
            this.uiSpinner.replaceWith(this.element);
        },

        stepUp: modifier(function (steps) {
            this._stepUp(steps);
        }),
        _stepUp: function (steps) {
            if (this._start()) {
                this._spin((steps || 1) * this.options.step);
                this._stop();
            }
        },

        stepDown: modifier(function (steps) {
            this._stepDown(steps);
        }),
        _stepDown: function (steps) {
            if (this._start()) {
                this._spin((steps || 1) * -this.options.step);
                this._stop();
            }
        },

        pageUp: modifier(function (pages) {
            this._stepUp((pages || 1) * this.options.page);
        }),

        pageDown: modifier(function (pages) {
            this._stepDown((pages || 1) * this.options.page);
        }),

        value: function (newVal) {
            if (!arguments.length) {
                return this._parse(this.element.val());
            }
            modifier(this._value).call(this, newVal);
        },

        widget: function () {
            return this.uiSpinner;
        }
    });

});