/*
 * Ext JS Library 1.1 RC 1
 * Copyright(c) 2006-2007, Ext JS, LLC.
 * licensing@extjs.com
 * 
 * http://www.extjs.com/license
 */

/**
 * @class Ext.DatePicker
 * @extends Ext.Component
 * Simple date picker class.
 * @constructor
 * Create a new DatePicker
 * @param {Object} config The config object
 */
Ext.DatePicker = function(config){
    Ext.DatePicker.superclass.constructor.call(this, config);

    this.value = config && config.value ?
                 config.value.clearTime() : new Date().clearTime();

    this.addEvents({
        /**
	     * @event select
	     * Fires when a date is selected
	     * @param {DatePicker} this
	     * @param {Date} date The selected date
	     */
        select: true
    });

    if(this.handler){
        this.on("select", this.handler,  this.scope || this);
    }
    // build the disabledDatesRE
    if(!this.disabledDatesRE && this.disabledDates){
        var dd = this.disabledDates;
        var re = "(?:";
        for(var i = 0; i < dd.length; i++){
            re += dd[i];
            if(i != dd.length-1) re += "|";
        }
        this.disabledDatesRE = new RegExp(re + ")");
    }
};

Ext.extend(Ext.DatePicker, Ext.Component, {
    /**
     * @cfg {String} todayText
     * The text to display on the button that selects the current date (defaults to "Today")
     */
    todayText : "Today",
    /**
     * @cfg {String} okText
     * The text to display on the ok button
     */
    okText : "&#160;OK&#160;", // &#160; to give the user extra clicking room
    /**
     * @cfg {String} cancelText
     * The text to display on the cancel button
     */
    cancelText : "Cancel",
    /**
     * @cfg {String} todayTip
     * The tooltip to display for the button that selects the current date (defaults to "{current date} (Spacebar)")
     */
    todayTip : "{0} (Spacebar)",
    /**
     * @cfg {Date} minDate
     * Minimum allowable date (JavaScript date object, defaults to null)
     */
    minDate : null,
    /**
     * @cfg {Date} maxDate
     * Maximum allowable date (JavaScript date object, defaults to null)
     */
    maxDate : null,
    /**
     * @cfg {String} minText
     * The error text to display if the minDate validation fails (defaults to "This date is before the minimum date")
     */
    minText : "This date is before the minimum date",
    /**
     * @cfg {String} maxText
     * The error text to display if the maxDate validation fails (defaults to "This date is after the maximum date")
     */
    maxText : "This date is after the maximum date",
    /**
     * @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 {Array} disabledDays
     * An array of days to disable, 0-based. For example, [0, 6] disables Sunday and Saturday (defaults to null).
     */
    disabledDays : null,
    /**
     * @cfg {String} disabledDaysText
     * The tooltip to display when the date falls on a disabled day (defaults to "")
     */
    disabledDaysText : "",
    /**
     * @cfg {RegExp} disabledDatesRE
     * JavaScript regular expression used to disable a pattern of dates (defaults to null)
     */
    disabledDatesRE : null,
    /**
     * @cfg {String} disabledDatesText
     * The tooltip text to display when the date falls on a disabled date (defaults to "")
     */
    disabledDatesText : "",
    /**
     * @cfg {Boolean} constrainToViewport
     * True to constrain the date picker to the viewport (defaults to true)
     */
    constrainToViewport : true,
    /**
     * @cfg {Array} monthNames
     * An array of textual month names which can be overriden for localization support (defaults to Date.monthNames)
     */
    monthNames : Date.monthNames,
    /**
     * @cfg {Array} dayNames
     * An array of textual day names which can be overriden for localization support (defaults to Date.dayNames)
     */
    dayNames : Date.dayNames,
    /**
     * @cfg {String} nextText
     * The next month navigation button tooltip (defaults to 'Next Month (Control+Right)')
     */
    nextText: 'Next Month (Control+Right)',
    /**
     * @cfg {String} prevText
     * The previous month navigation button tooltip (defaults to 'Previous Month (Control+Left)')
     */
    prevText: 'Previous Month (Control+Left)',
    /**
     * @cfg {String} monthYearText
     * The header month selector tooltip (defaults to 'Choose a month (Control+Up/Down to move years)')
     */
    monthYearText: 'Choose a month (Control+Up/Down to move years)',
    /**
     * @cfg {Number} startDay
     * Day index at which the week should begin, 0-based (defaults to 0, which is Sunday)
     */
    startDay : 0,

    /**
     * Sets the value of the date field
     * @param {Date} value The date to set
     */
    setValue : function(value){
        var old = this.value;
        this.value = value.clearTime(true);
        if(this.el){
            this.update(this.value);
        }
    },

    /**
     * Gets the current selected value of the date field
     * @return {Date} The selected date
     */
    getValue : function(){
        return this.value;
    },

    // private
    focus : function(){
        if(this.el){
            this.update(this.activeDate);
        }
    },

    // private
    onRender : function(container, position){
        var m = [
             '<table cellspacing="0">',
                '<tr><td class="x-date-left"><a href="#" title="', this.prevText ,'">&#160;</a></td><td class="x-date-middle" align="center"></td><td class="x-date-right"><a href="#" title="', this.nextText ,'">&#160;</a></td></tr>',
                '<tr><td colspan="3"><table class="x-date-inner" cellspacing="0"><thead><tr>'];
        var dn = this.dayNames;
        for(var i = 0; i < 7; i++){
            var d = this.startDay+i;
            if(d > 6){
                d = d-7;
            }
            m.push("<th><span>", dn[d].substr(0,1), "</span></th>");
        }
        m[m.length] = "</tr></thead><tbody><tr>";
        for(var i = 0; i < 42; i++) {
            if(i % 7 == 0 && i != 0){
                m[m.length] = "</tr><tr>";
            }
            m[m.length] = '<td><a href="#" hidefocus="on" class="x-date-date" tabIndex="1"><em><span></span></em></a></td>';
        }
        m[m.length] = '</tr></tbody></table></td></tr><tr><td colspan="3" class="x-date-bottom" align="center"></td></tr></table><div class="x-date-mp"></div>';

        var el = document.createElement("div");
        el.className = "x-date-picker";
        el.innerHTML = m.join("");

        container.dom.insertBefore(el, position);

        this.el = Ext.get(el);
        this.eventEl = Ext.get(el.firstChild);

        new Ext.util.ClickRepeater(this.el.child("td.x-date-left a"), {
            handler: this.showPrevMonth,
            scope: this,
            preventDefault:true,
            stopDefault:true
        });

        new Ext.util.ClickRepeater(this.el.child("td.x-date-right a"), {
            handler: this.showNextMonth,
            scope: this,
            preventDefault:true,
            stopDefault:true
        });

        this.eventEl.on("mousewheel", this.handleMouseWheel,  this);

        this.monthPicker = this.el.down('div.x-date-mp');
        this.monthPicker.enableDisplayMode('block');
        
        var kn = new Ext.KeyNav(this.eventEl, {
            "left" : function(e){
                e.ctrlKey ?
                    this.showPrevMonth() :
                    this.update(this.activeDate.add("d", -1));
            },

            "right" : function(e){
                e.ctrlKey ?
                    this.showNextMonth() :
                    this.update(this.activeDate.add("d", 1));
            },

            "up" : function(e){
                e.ctrlKey ?
                    this.showNextYear() :
                    this.update(this.activeDate.add("d", -7));
            },

            "down" : function(e){
                e.ctrlKey ?
                    this.showPrevYear() :
                    this.update(this.activeDate.add("d", 7));
            },

            "pageUp" : function(e){
                this.showNextMonth();
            },

            "pageDown" : function(e){
                this.showPrevMonth();
            },

            "enter" : function(e){
                e.stopPropagation();
                return true;
            },

            scope : this
        });

        this.eventEl.on("click", this.handleDateClick,  this, {delegate: "a.x-date-date"});

        this.eventEl.addKeyListener(Ext.EventObject.SPACE, this.selectToday,  this);

        this.el.unselectable();
        
        this.cells = this.el.select("table.x-date-inner tbody td");
        this.textNodes = this.el.query("table.x-date-inner tbody span");

        this.mbtn = new Ext.Button(this.el.child("td.x-date-middle", true), {
            text: "&#160;",
            tooltip: this.monthYearText
        });

        this.mbtn.on('click', this.showMonthPicker, this);
        this.mbtn.el.child(this.mbtn.menuClassTarget).addClass("x-btn-with-menu");


        var today = (new Date()).dateFormat(this.format);
        var todayBtn = new Ext.Button(this.el.child("td.x-date-bottom", true), {
            text: String.format(this.todayText, today),
            tooltip: String.format(this.todayTip, today),
            handler: this.selectToday,
            scope: this
        });
        
        if(Ext.isIE){
            this.el.repaint();
        }
        this.update(this.value);
    },

    createMonthPicker : function(){
        if(!this.monthPicker.dom.firstChild){
            var buf = ['<table border="0" cellspacing="0">'];