/** 
 * @class Ext.ux.grid.filter.DateFilter
 * @extends Ext.ux.grid.filter.Filter
 * Filter by a configurable Ext.menu.DateMenu
 * 
Example Usage:
 * 
    
var filters = new Ext.ux.grid.GridFilters({
    ...
    filters: [{
        // required configs
        type: 'date',
        dataIndex: 'dateAdded',
        
        // optional configs
        dateFormat: 'm/d/Y',  // default
        beforeText: 'Before', // default
        afterText: 'After',   // default
        onText: 'On',         // default
        pickerOpts: {
            // any DateMenu configs
        },

        active: true // default is false
    }]
});
 * 
 */
Ext.ux.grid.filter.DateFilter = Ext.extend(Ext.ux.grid.filter.Filter, {
    
/**
     * @cfg {String} afterText
     * Defaults to 'After'.
     */
    afterText : 'After',
    
/**
     * @cfg {String} beforeText
     * Defaults to 'Before'.
     */
    beforeText : 'Before',
    
/**
     * @cfg {Object} compareMap
     * Map for assigning the comparison values used in serialization.
     */
    compareMap : {
        before: 'lt',
        after:  'gt',
        on:     'eq'
    },
    
/**
     * @cfg {String} dateFormat
     * The date format to return when using getValue.
     * Defaults to 'm/d/Y'.
     */
    dateFormat : 'm/d/Y',

    
/**
     * @cfg {Date} maxDate
     * Allowable date as passed to the Ext.DatePicker
     * Defaults to undefined.
     */
    
/**
     * @cfg {Date} minDate
     * Allowable date as passed to the Ext.DatePicker
     * Defaults to undefined.
     */
    
/**
     * @cfg {Array} menuItems
     * The items to be shown in this menu
     * Defaults to:
     * menuItems : ['before', 'after', '-', 'on'],
     * 
     */
    menuItems : ['before', 'after', '-', 'on'],

    
/**
     * @cfg {Object} menuItemCfgs
     * Default configuration options for each menu item
     */
    menuItemCfgs : {
        selectOnFocus: true,
        width: 125
    },

    
/**
     * @cfg {String} onText
     * Defaults to 'On'.
     */
    onText : 'On',
    
    
/**
     * @cfg {Object} pickerOpts
     * Configuration options for the date picker associated with each field.
     */
    pickerOpts : {},

    /**  
     * @private
     * Template method that is to initialize the filter and install required menu items.
     */
    init : function (config) {
        var menuCfg, i, len, item, cfg, Cls;

        menuCfg = Ext.apply(this.pickerOpts, {
            minDate: this.minDate, 
            maxDate: this.maxDate, 
            format:  this.dateFormat,
            listeners: {
                scope: this,
                select: this.onMenuSelect
            }
        });

        this.fields = {};
        for (i = 0, len = this.menuItems.length; i < len; i++) {
            item = this.menuItems[i];
            if (item !== '-') {
                cfg = {
                    itemId: 'range-' + item,
                    text: this[item + 'Text'],
                    menu: new Ext.menu.DateMenu(
                        Ext.apply(menuCfg, {
                            itemId: item
                        })
                    ),
                    listeners: {
                        scope: this,
                        checkchange: this.onCheckChange
                    }
                };
                Cls = Ext.menu.CheckItem;
                item = this.fields[item] = new Cls(cfg);
            }
            //this.add(item);
            this.menu.add(item);
        }
    },

    onCheckChange : function () {
        this.setActive(this.isActivatable());
        this.fireEvent('update', this);
    },

    /**  
     * @private
     * Handler method called when there is a keyup event on an input
     * item of this menu.
     */
    onInputKeyUp : function (field, e) {
        var k = e.getKey();
        if (k == e.RETURN && field.isValid()) {
            e.stopEvent();
            this.menu.hide(true);
            return;
        }
    },

    
/**
     * Handler for when the menu for a field fires the 'select' event
     * @param {Object} date
     * @param {Object} menuItem
     * @param {Object} value
     * @param {Object} picker
     */
    onMenuSelect : function (menuItem, value, picker) {
        var fields = this.fields,
            field = this.fields[menuItem.itemId];
        
        field.setChecked(true);
        
        if (field == fields.on) {
            fields.before.setChecked(false, true);
            fields.after.setChecked(false, true);
        } else {
            fields.on.setChecked(false, true);
            if (field == fields.after && fields.before.menu.picker.value < value) {
                fields.before.setChecked(false, true);
            } else if (field == fields.before && fields.after.menu.picker.value > value) {
                fields.after.setChecked(false, true);
            }
        }
        this.fireEvent('update', this);
    },

    /**
     * @private
     * Template method that is to get and return the value of the filter.
     * @return {String} The value of this filter
     */
    getValue : function () {
        var key, result = {};
        for (key in this.fields) {
            if (this.fields[key].checked) {
                result[key] = this.fields[key].menu.picker.getValue();
            }
        }
        return result;
    },

    /**
     * @private
     * Template method that is to set the value of the filter.
     * @param {Object} value The value to set the filter
     * @param {Boolean} preserve true to preserve the checked status
     * of the other fields.  Defaults to false, unchecking the
     * other fields
     */	
    setValue : function (value, preserve) {
        var key;
        for (key in this.fields) {
            if(value[key]){
                this.fields[key].menu.picker.setValue(value[key]);
                this.fields[key].setChecked(true);
            } else if (!preserve) {
                this.fields[key].setChecked(false);
            }
        }
        this.fireEvent('update', this);
    },

    /**
     * @private
     * Template method that is to return true if the filter
     * has enough configuration information to be activated.
     * @return {Boolean}
     */
    isActivatable : function () {
        var key;
        for (key in this.fields) {
            if (this.fields[key].checked) {
                return true;
            }
        }
        return false;
    },

    /**
     * @private
     * Template method that is to get and return serialized filter data for
     * transmission to the server.
     * @return {Object/Array} An object or collection of objects containing
     * key value pairs representing the current configuration of the filter.
     */
    getSerialArgs : function () {
        var args = [];
        for (var key in this.fields) {
            if(this.fields[key].checked){
                args.push({
                    type: 'date',
                    comparison: this.compareMap[key],
                    value: this.getFieldValue(key).format(this.dateFormat)
                });
            }
        }
        return args;
    },

    
/**
     * Get and return the date menu picker value
     * @param {String} item The field identifier ('before', 'after', 'on')
     * @return {Date} Gets the current selected value of the date field
     */
    getFieldValue : function(item){
        return this.fields[item].menu.picker.getValue();
    },
    
    
/**
     * Gets the menu picker associated with the passed field
     * @param {String} item The field identifier ('before', 'after', 'on')
     * @return {Object} The menu picker
     */
    getPicker : function(item){
        return this.fields[item].menu.picker;
    },

    
/**
     * Template method that is to validate the provided Ext.data.Record
     * against the filters configuration.
     * @param {Ext.data.Record} record The record to validate
     * @return {Boolean} true if the record is valid within the bounds
     * of the filter, false otherwise.
     */
    validateRecord : function (record) {
        var key,
            pickerValue,
            val = record.get(this.dataIndex);
            
        if(!Ext.isDate(val)){
            return false;
        }
        val = val.clearTime(true).getTime();
        
        for (key in this.fields) {
            if (this.fields[key].checked) {
                pickerValue = this.getFieldValue(key).clearTime(true).getTime();
                if (key == 'before' && pickerValue <= val) {
                    return false;
                }
                if (key == 'after' && pickerValue >= val) {
                    return false;
                }
                if (key == 'on' && pickerValue != val) {
                    return false;
                }
            }
        }
        return true;
    }
});