/**
 * @class Ext.form.Date
 * @extends Ext.form.Picker
 * 
Provides a date input field with a {@link Ext.picker.Date date picker} dropdown and automatic date
 * validation.
 * 
This field recognizes and uses JavaScript Date objects 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.
 * 
Example usage:
 * 
new Ext.form.FormPanel({
    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',
        maxValue: new Date(),
        value: new Date()  // defaults to today
    }]
});

 * @constructor
 * Create a new Date field
 * @param {Object} config
 * 
 * @xtype datefield
 */
Ext.define('Ext.form.Date', {
    extend:'Ext.form.Picker',
    alias: 'widget.datefield',
    requires: ['Ext.picker.Date', 'Ext.util.Date'],
    alternateClassName: 'Ext.form.DateField',

    
/**
     * @cfg {String} format
     * The default date format string which can be overriden for localization support.  The format must be
     * valid according to {@link Date#parseDate} (defaults to 'm/d/Y').
     */
    format : "m/d/Y",
    
/**
     * @cfg {String} altFormats
     * Multiple date formats separated by "|" to try when parsing a user input value and it
     * does not match the defined format (defaults to
     * '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').
     */
    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",
    
/**
     * @cfg {String} disabledDaysText
     * The tooltip to display when the date falls on a disabled day (defaults to 'Disabled')
     */
    disabledDaysText : "Disabled",
    
/**
     * @cfg {String} disabledDatesText
     * The tooltip text to display when the date falls on a disabled date (defaults to 'Disabled')
     */
    disabledDatesText : "Disabled",
    
/**
     * @cfg {String} minText
     * The error text to display when the date in the cell is before {@link #minValue} (defaults to
     * 'The date in this field must be after {minValue}').
     */
    minText : "The date in this field must be equal to or after {0}",
    
/**
     * @cfg {String} maxText
     * The error text to display when the date in the cell is after {@link #maxValue} (defaults to
     * 'The date in this field must be before {maxValue}').
     */
    maxText : "The date in this field must be equal to or before {0}",
    
/**
     * @cfg {String} invalidText
     * The error text to display when the date in the field is invalid (defaults to
     * '{value} is not a valid date - it must be in the format {format}').
     */
    invalidText : "{0} is not a valid date - it must be in the format {1}",
    
/**
     * @cfg {String} triggerCls
     * 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
     * (defaults to 'x-form-date-trigger' which 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 (defaults to true).
     */
    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 (defaults to undefined).
     */
    
/**
     * @cfg {Date/String} maxValue
     * The maximum allowed date. Can be either a Javascript date object or a string date in a
     * valid format (defaults to undefined).
     */
    
/**
     * @cfg {Array} disabledDays
     * An array of days to disable, 0 based (defaults to undefined). Some examples:

// disable Sunday and Saturday:
disabledDays:  [0, 6]
// disable weekdays:
disabledDays: [1,2,3,4,5]
     * 
     */
    
/**
     * @cfg {Array} 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"].
     */

    // 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,

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

        Ext.form.Date.superclass.initComponent.call(me);

        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();
    },

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

            Ext.each(dd, function(d, i){
                re += Ext.isDate(d) ? '^' + Ext.String.escapeRegex(d.dateFormat(this.format)) + '$' : dd[i];
                if (i !== len) {
                    re += '|';
                }
            }, this);
            this.disabledDatesRE = new RegExp(re + ')');
        }
    },

    
/**
     * Replaces any existing disabled dates with new values and refreshes the Date picker.
     * @param {Array} 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 {Array} 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.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.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 {Mixed} value The value to get errors for (defaults to the current field value)
     * @return {Array} All validation errors for this field
     */
    getErrors: function(value) {
        var me = this,
            format = Ext.String.format,
            clearTime = Ext.Date.clearTime,
            errors = Ext.form.Date.superclass.getErrors.apply(me, 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, 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) || null;
    },

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

    
).

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');
">
/**
     * @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 Date#parseDate} (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.Date} this
     */

    
/**
     * Attempts to parse a given string value using a given {@link Date#parseDate date format}.
     * @param {String} value The value to attempt to parse
     * @param {String} format A valid date format (see {@link Date#parseDate})
     * @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,
            parseDate = utilDate.parseDate,
            parsedDate,
            result = null;
        if (/[gGhH]/.test(format.replace(/(\\.)/g, ''))) {
            // if parse format contains hour information, no DST adjustment is necessary
            result = parseDate(value, format);
        } else {
            // set time to 12 noon, then clear the time
            parsedDate = parseDate(value + ' ' + me.initTime, format + ' ' + me.initTimeFormat);
            if (parsedDate) {
                result = utilDate.clearTime(parsedDate);
            }
        }
        return result;
    },

    /**
     * @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,
            picker = new Ext.picker.Date({
                ownerCt: this.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,
                minText : format(me.minText, me.formatDate(me.minValue)),
                maxText : format(me.maxText, me.formatDate(me.maxValue)),
                listeners: {
                    scope: me,
                    select: me.onSelect
                }
            });

        // Add handler for Escape key to close the picker
        picker.keyNav.esc = function() {
            me.collapse();
        };
        return picker;
    },

    onSelect: function(m, d) {
        this.setValue(d);
        this.fireEvent('select', this, d);
        this.collapse();
    },

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

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

    // private
    beforeBlur : function(){
        var v = this.parseDate(this.getRawValue());
        if(v){
            this.setValue(v);
        }
    }

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