    /**
     * @docauthor Jason Johnston <jason@sencha.com>
     *
     * Provides a date input field with a {@link Ext.picker.Date date picker} dropdown and automatic date
     * validation.
     *
     * This field recognizes and uses the JavaScript Date object as its main {@link #value} type. In addition,
     * it recognizes string values which are parsed according to the {@link #format} and/or {@link #altFormats}
     * configs. These may be reconfigured to use date formats appropriate for the user's locale.
     *
     * The field may be limited to a certain range of dates by using the {@link #minValue}, {@link #maxValue},
     * {@link #disabledDays}, and {@link #disabledDates} config parameters. These configurations will be used both
     * in the field's validation, and in the date picker dropdown by preventing invalid dates from being selected.
     *
     * # Example usage
     *
     *     @example
     *     Ext.create('Ext.form.Panel', {
     *         renderTo: Ext.getBody(),
     *         width: 300,
     *         bodyPadding: 10,
     *         title: 'Dates',
     *         items: [{
     *             xtype: 'datefield',
     *             anchor: '100%',
     *             fieldLabel: 'From',
     *             name: 'from_date',
     *             maxValue: new Date()  // limited to the current date or prior
     *         }, {
     *             xtype: 'datefield',
     *             anchor: '100%',
     *             fieldLabel: 'To',
     *             name: 'to_date',
     *             value: new Date()  // defaults to today
     *         }]
     *     });
     *
     * # Date Formats Examples
     *
     * This example shows a couple of different date format parsing scenarios. Both use custom date format
     * configurations; the first one matches the configured `format` while the second matches the `altFormats`.
     *
     *     @example
     *     Ext.create('Ext.form.Panel', {
     *         renderTo: Ext.getBody(),
     *         width: 300,
     *         bodyPadding: 10,
     *         title: 'Dates',
     *         items: [{
     *             xtype: 'datefield',
     *             anchor: '100%',
     *             fieldLabel: 'Date',
     *             name: 'date',
     *             // The value matches the format; will be parsed and displayed using that format.
     *             format: 'm d Y',
     *             value: '2 4 1978'
     *         }, {
     *             xtype: 'datefield',
     *             anchor: '100%',
     *             fieldLabel: 'Date',
     *             name: 'date',
     *             // The value does not match the format, but does match an altFormat; will be parsed
     *             // using the altFormat and displayed using the format.
     *             format: 'm d Y',
     *             altFormats: 'm,d,Y|m.d.Y',
     *             value: '2.4.1978'
     *         }]
     *     });
     */
    Ext.define('Ext.form.field.Date', {
        extend:'Ext.form.field.Picker',
        alias: 'widget.datefield',
        requires: ['Ext.picker.Date'],
        alternateClassName: ['Ext.form.DateField', 'Ext.form.Date'],

        //<locale>
        /**
         * @cfg {String} format
         * The default date format string which can be overriden for localization support. The format must be valid
         * according to {@link Ext.Date#parse}.
         */
        format : "m/d/Y",
        //</locale>
        //<locale>
        /**
         * @cfg {String} altFormats
         * Multiple date formats separated by "|" to try when parsing a user input value and it does not match the defined
         * format.
         */
        altFormats : "m/d/Y|n/j/Y|n/j/y|m/j/y|n/d/y|m/j/Y|n/d/Y|m-d-y|m-d-Y|m/d|m-d|md|mdy|mdY|d|Y-m-d|n-j|n/j",
        //</locale>
        //<locale>
        /**
         * @cfg {String} disabledDaysText
         * The tooltip to display when the date falls on a disabled day.
         */
        disabledDaysText : "Disabled",
        //</locale>
        //<locale>
        /**
         * @cfg {String} disabledDatesText
         * The tooltip text to display when the date falls on a disabled date.
         */
        disabledDatesText : "Disabled",
        //</locale>
        //<locale>
        /**
         * @cfg {String} minText
         * The error text to display when the date in the cell is before {@link #minValue}.
         */
        minText : "The date in this field must be equal to or after {0}",
        //</locale>
        //<locale>
        /**
         * @cfg {String} maxText
         * The error text to display when the date in the cell is after {@link #maxValue}.
         */
        maxText : "The date in this field must be equal to or before {0}",
        //</locale>
        //<locale>
        /**
         * @cfg {String} invalidText
         * The error text to display when the date in the field is invalid.
         */
        invalidText : "{0} is not a valid date - it must be in the format {1}",
        //</locale>
        /**
         * @cfg {String} [triggerCls='x-form-date-trigger']
         * An additional CSS class used to style the trigger button. The trigger will always get the class 'x-form-trigger'
         * and triggerCls will be **appended** if specified (default class displays a calendar icon).
         */
        triggerCls : Ext.baseCSSPrefix + 'form-date-trigger',
        /**
         * @cfg {Boolean} showToday
         * false to hide the footer area of the Date picker containing the Today button and disable the keyboard handler for
         * spacebar that selects the current date.
         */
        showToday : true,
        /**
         * @cfg {Date/String} minValue
         * The minimum allowed date. Can be either a Javascript date object or a string date in a valid format.
         */
        /**
         * @cfg {Date/String} maxValue
         * The maximum allowed date. Can be either a Javascript date object or a string date in a valid format.
         */
        /**
         * @cfg {Number[]} disabledDays
         * An array of days to disable, 0 based. Some examples:
         *
         *     // disable Sunday and Saturday:
         *     disabledDays:  [0, 6]
         *     // disable weekdays:
         *     disabledDays: [1,2,3,4,5]
         */
        /**
         * @cfg {String[]} disabledDates
         * An array of "dates" to disable, as strings. These strings will be used to build a dynamic regular expression so
         * they are very powerful. Some examples:
         *
         *     // disable these exact dates:
         *     disabledDates: ["03/08/2003", "09/16/2003"]
         *     // disable these days for every year:
         *     disabledDates: ["03/08", "09/16"]
         *     // only match the beginning (useful if you are using short years):
         *     disabledDates: ["^03/08"]
         *     // disable every day in March 2006:
         *     disabledDates: ["03/../2006"]
         *     // disable every day in every March:
         *     disabledDates: ["^03"]
         *
         * Note that the format of the dates included in the array should exactly match the {@link #format} config. In order
         * to support regular expressions, if you are using a {@link #format date format} that has "." in it, you will have
         * to escape the dot when restricting dates. For example: `["03\\.08\\.03"]`.
         */

        /**
         * @cfg {String} submitFormat
         * The date format string which will be submitted to the server. The format must be valid according to
         * {@link Ext.Date#parse}.
         *
         * Defaults to {@link #format}.
         */

        /**
         * @cfg {Boolean} useStrict
         * True to enforce strict date parsing to prevent the default Javascript "date rollover".
         * Defaults to the useStrict parameter set on Ext.Date
         * See {@link Ext.Date#parse}.
         */
        useStrict: undefined,

        // in the absence of a time value, a default value of 12 noon will be used
        // (note: 12 noon was chosen because it steers well clear of all DST timezone changes)
        initTime: '12', // 24 hour format

        initTimeFormat: 'H',

        matchFieldWidth: false,
        //<locale>
        /**
         * @cfg {Number} [startDay=undefined]
         * Day index at which the week should begin, 0-based.
         *
         * Defaults to `0` (Sunday).
         */
        startDay: 0,
        //</locale>

        initComponent : function(){
            var me = this,
                isString = Ext.isString,
                min, max;

            min = me.minValue;
            max = me.maxValue;
            if(isString(min)){
                me.minValue = me.parseDate(min);
            }
            if(isString(max)){
                me.maxValue = me.parseDate(max);
            }
            me.disabledDatesRE = null;
            me.initDisabledDays();

            me.callParent();
        },

        initValue: function() {
            var me = this,
                value = me.value;

            // If a String value was supplied, try to convert it to a proper Date
            if (Ext.isString(value)) {
                me.value = me.rawToValue(value);
            }

            me.callParent();
        },

        // private
        initDisabledDays : function(){
            if(this.disabledDates){
                var dd   = this.disabledDates,
                    len  = dd.length - 1,
                    re   = "(?:",
                    d,
                    dLen = dd.length,
                    date;

                for (d = 0; d < dLen; d++) {
                    date = dd[d];

                    re += Ext.isDate(date) ? '^' + Ext.String.escapeRegex(date.dateFormat(this.format)) + '$' : date;
                    if (d !== len) {
                        re += '|';
                    }
                }

                this.disabledDatesRE = new RegExp(re + ')');
            }
        },

        /**
         * Replaces any existing disabled dates with new values and refreshes the Date picker.
         * @param {String[]} disabledDates An array of date strings (see the {@link #disabledDates} config for details on
         * supported values) used to disable a pattern of dates.
         */
        setDisabledDates : function(dd){
            var me = this,
                picker = me.picker;

            me.disabledDates = dd;
            me.initDisabledDays();
            if (picker) {
                picker.setDisabledDates(me.disabledDatesRE);
            }
        },

        /**
         * Replaces any existing disabled days (by index, 0-6) with new values and refreshes the Date picker.
         * @param {Number[]} disabledDays An array of disabled day indexes. See the {@link #disabledDays} config for details on
         * supported values.
         */
        setDisabledDays : function(dd){
            var picker = this.picker;

            this.disabledDays = dd;
            if (picker) {
                picker.setDisabledDays(dd);
            }
        },

        /**
         * Replaces any existing {@link #minValue} with the new value and refreshes the Date picker.
         * @param {Date} value The minimum date that can be selected
         */
        setMinValue : function(dt){
            var me = this,
                picker = me.picker,
                minValue = (Ext.isString(dt) ? me.parseDate(dt) : dt);

            me.minValue = minValue;
            if (picker) {
                picker.minText = Ext.String.format(me.minText, me.formatDate(me.minValue));
                picker.setMinDate(minValue);
            }
        },

        /**
         * Replaces any existing {@link #maxValue} with the new value and refreshes the Date picker.
         * @param {Date} value The maximum date that can be selected
         */
        setMaxValue : function(dt){
            var me = this,
                picker = me.picker,
                maxValue = (Ext.isString(dt) ? me.parseDate(dt) : dt);

            me.maxValue = maxValue;
            if (picker) {
                picker.maxText = Ext.String.format(me.maxText, me.formatDate(me.maxValue));
                picker.setMaxDate(maxValue);
            }
        },

        /**
         * Runs all of Date's validations and returns an array of any errors. Note that this first runs Text's validations,
         * so the returned array is an amalgamation of all field errors. The additional validation checks are testing that
         * the date format is valid, that the chosen date is within the min and max date constraints set, that the date
         * chosen is not in the disabledDates regex and that the day chosed is not one of the disabledDays.
         * @param {Object} [value] The value to get errors for (defaults to the current field value)
         * @return {String[]} All validation errors for this field
         */
        getErrors: function(value) {
            var me = this,
                format = Ext.String.format,
                clearTime = Ext.Date.clearTime,
                errors = me.callParent(arguments),
                disabledDays = me.disabledDays,
                disabledDatesRE = me.disabledDatesRE,
                minValue = me.minValue,
                maxValue = me.maxValue,
                len = disabledDays ? disabledDays.length : 0,
                i = 0,
                svalue,
                fvalue,
                day,
                time;

            value = me.formatDate(value || me.processRawValue(me.getRawValue()));

            if (value === null || value.length < 1) { // if it's blank and textfield didn't flag it then it's valid
                 return errors;
            }

            svalue = value;
            value = me.parseDate(value);
            if (!value) {
                errors.push(format(me.invalidText, svalue, Ext.Date.unescapeFormat(me.format)));
                return errors;
            }

            time = value.getTime();
            if (minValue && time < clearTime(minValue).getTime()) {
                errors.push(format(me.minText, me.formatDate(minValue)));
            }

            if (maxValue && time > clearTime(maxValue).getTime()) {
                errors.push(format(me.maxText, me.formatDate(maxValue)));
            }

            if (disabledDays) {
                day = value.getDay();

                for(; i < len; i++) {
                    if (day === disabledDays[i]) {
                        errors.push(me.disabledDaysText);
                        break;
                    }
                }
            }

            fvalue = me.formatDate(value);
            if (disabledDatesRE && disabledDatesRE.test(fvalue)) {
                errors.push(format(me.disabledDatesText, fvalue));
            }

            return errors;
        },

        rawToValue: function(rawValue) {
            return this.parseDate(rawValue) || rawValue || null;
        },

        valueToRaw: function(value) {
            return this.formatDate(this.parseDate(value));
        },

        /**
         * @method setValue
         * Sets the value of the date field. You can pass a date object or any string that can be parsed into a valid date,
         * using {@link #format} as the date format, according to the same rules as {@link Ext.Date#parse} (the default
         * format used is "m/d/Y").
         *
         * Usage:
         *
         *     //All of these calls set the same date value (May 4, 2006)
         *
         *     //Pass a date object:
         *     var dt = new Date('5/4/2006');
         *     dateField.setValue(dt);
         *
         *     //Pass a date string (default format):
         *     dateField.setValue('05/04/2006');
         *
         *     //Pass a date string (custom format):
         *     dateField.format = 'Y-m-d';
         *     dateField.setValue('2006-05-04');
         *
         * @param {String/Date} date The date or valid date string
         * @return {Ext.form.field.Date} this
         */

        /**
         * Attempts to parse a given string value using a given {@link Ext.Date#parse date format}.
         * @param {String} value The value to attempt to parse
         * @param {String} format A valid date format (see {@link Ext.Date#parse})
         * @return {Date} The parsed Date object, or null if the value could not be successfully parsed.
         */
        safeParse : function(value, format) {
            var me = this,
                utilDate = Ext.Date,
                result = null,
                strict = me.useStrict,
                parsedDate;

            if (utilDate.formatContainsHourInfo(format)) {
                // if parse format contains hour information, no DST adjustment is necessary
                result = utilDate.parse(value, format, strict);
            } else {
                // set time to 12 noon, then clear the time
                parsedDate = utilDate.parse(value + ' ' + me.initTime, format + ' ' + me.initTimeFormat, strict);
                if (parsedDate) {
                    result = utilDate.clearTime(parsedDate);
                }
            }
            return result;
        },

        // @private
        getSubmitValue: function() {
            var format = this.submitFormat || this.format,
                value = this.getValue();

            return value ? Ext.Date.format(value, format) : '';
        },

        /**
         * @private
         */
        parseDate : function(value) {
            if(!value || Ext.isDate(value)){
                return value;
            }

            var me = this,
                val = me.safeParse(value, me.format),
                altFormats = me.altFormats,
                altFormatsArray = me.altFormatsArray,
                i = 0,
                len;

            if (!val && altFormats) {
                altFormatsArray = altFormatsArray || altFormats.split('|');
                len = altFormatsArray.length;
                for (; i < len && !val; ++i) {
                    val = me.safeParse(value, altFormatsArray[i]);
                }
            }
            return val;
        },

        // private
        formatDate : function(date){
            return Ext.isDate(date) ? Ext.Date.dateFormat(date, this.format) : date;
        },

        createPicker: function() {
            var me = this,
                format = Ext.String.format;

            return new Ext.picker.Date({
                pickerField: me,
                ownerCt: me.ownerCt,
                renderTo: document.body,
                floating: true,
                hidden: true,
                focusOnShow: true,
                minDate: me.minValue,
                maxDate: me.maxValue,
                disabledDatesRE: me.disabledDatesRE,
                disabledDatesText: me.disabledDatesText,
                disabledDays: me.disabledDays,
                disabledDaysText: me.disabledDaysText,
                format: me.format,
                showToday: me.showToday,
                startDay: me.startDay,
                minText: format(me.minText, me.formatDate(me.minValue)),
                maxText: format(me.maxText, me.formatDate(me.maxValue)),
                listeners: {
                    scope: me,
                    select: me.onSelect
                },
                keyNavConfig: {
                    esc: function() {
                        me.collapse();
                    }
                }
            });
        },

        onSelect: function(m, d) {
            var me = this;

            me.setValue(d);
            me.fireEvent('select', me, d);
            me.collapse();
        },

        /**
         * @private
         * Sets the Date picker's value to match the current field value when expanding.
         */
        onExpand: function() {
            var value = this.getValue();
            this.picker.setValue(Ext.isDate(value) ? value : new Date());
        },

        /**
         * @private
         * Focuses the field when collapsing the Date picker.
         */
        onCollapse: function() {
            this.focus(false, 60);
        },

        // private
        beforeBlur : function(){
            var me = this,
                v = me.parseDate(me.getRawValue()),
                focusTask = me.focusTask;

            if (focusTask) {
                focusTask.cancel();
            }

            if (v) {
                me.setValue(v);
            }
        }

        /**
         * @cfg {Boolean} grow
         * @private
         */
        /**
         * @cfg {Number} growMin
         * @private
         */
        /**
         * @cfg {Number} growMax
         * @private
         */
        /**
         * @method autoSize
         * @private
         */
    });