/*!
 * Ext JS Library 3.3.1
 * Copyright(c) 2006-2010 Sencha Inc.
 * licensing@sencha.com
 * http://www.sencha.com/license
 */
Ext.ns('Ext.ux.grid');

/**
 * @class Ext.ux.grid.GroupSummary
 * @extends Ext.util.Observable
 * A GridPanel plugin that enables dynamic column calculations and a dynamically
 * updated grouped summary row.
 */
Ext.ux.grid.GroupSummary = Ext.extend(Ext.util.Observable, {
    /**
     * @cfg {Function} summaryRenderer Renderer example:<pre><code>
summaryRenderer: function(v, params, data){
    return ((v === 0 || v > 1) ? '(' + v +' Tasks)' : '(1 Task)');
},
     * </code></pre>
     */
    /**
     * @cfg {String} summaryType (Optional) The type of
     * calculation to be used for the column.  For options available see
     * {@link #Calculations}.
     */

    constructor : function(config){
        Ext.apply(this, config);
        Ext.ux.grid.GroupSummary.superclass.constructor.call(this);
    },
    init : function(grid){
        this.grid = grid;
        var v = this.view = grid.getView();
        v.doGroupEnd = this.doGroupEnd.createDelegate(this);

        v.afterMethod('onColumnWidthUpdated', this.doWidth, this);
        v.afterMethod('onAllColumnWidthsUpdated', this.doAllWidths, this);
        v.afterMethod('onColumnHiddenUpdated', this.doHidden, this);
        v.afterMethod('onUpdate', this.doUpdate, this);
        v.afterMethod('onRemove', this.doRemove, this);

        if(!this.rowTpl){
            this.rowTpl = new Ext.Template(
                '<div class="x-grid3-summary-row" style="{tstyle}">',
                '<table class="x-grid3-summary-table" border="0" cellspacing="0" cellpadding="0" style="{tstyle}">',
                    '<tbody><tr>{cells}</tr></tbody>',
                '</table></div>'
            );
            this.rowTpl.disableFormats = true;
        }
        this.rowTpl.compile();

        if(!this.cellTpl){
            this.cellTpl = new Ext.Template(
                '<td class="x-grid3-col x-grid3-cell x-grid3-td-{id} {css}" style="{style}">',
                '<div class="x-grid3-cell-inner x-grid3-col-{id}" unselectable="on">{value}</div>',
                "</td>"
            );
            this.cellTpl.disableFormats = true;
        }
        this.cellTpl.compile();
    },

    /**
     * Toggle the display of the summary row on/off
     * @param {Boolean} visible <tt>true</tt> to show the summary, <tt>false</tt> to hide the summary.
     */
    toggleSummaries : function(visible){
        var el = this.grid.getGridEl();
        if(el){
            if(visible === undefined){
                visible = el.hasClass('x-grid-hide-summary');
            }
            el[visible ? 'removeClass' : 'addClass']('x-grid-hide-summary');
        }
    },

    renderSummary : function(o, cs){
        cs = cs || this.view.getColumnData();
        var cfg = this.grid.getColumnModel().config,
            buf = [], c, p = {}, cf, last = cs.length-1;
        for(var i = 0, len = cs.length; i < len; i++){
            c = cs[i];
            cf = cfg[i];
            p.id = c.id;
            p.style = c.style;
            p.css = i == 0 ? 'x-grid3-cell-first ' : (i == last ? 'x-grid3-cell-last ' : '');
            if(cf.summaryType || cf.summaryRenderer){
                p.value = (cf.summaryRenderer || c.renderer)(o.data[c.name], p, o);
            }else{
                p.value = '';
            }
            if(p.value == undefined || p.value === "") p.value = "&#160;";
            buf[buf.length] = this.cellTpl.apply(p);
        }

        return this.rowTpl.apply({
            tstyle: 'width:'+this.view.getTotalWidth()+';',
            cells: buf.join('')
        });
    },

    /**
     * @private
     * @param {Object} rs
     * @param {Object} cs
     */
    calculate : function(rs, cs){
        var data = {}, r, c, cfg = this.grid.getColumnModel().config, cf;
        for(var j = 0, jlen = rs.length; j < jlen; j++){
            r = rs[j];
            for(var i = 0, len = cs.length; i < len; i++){
                c = cs[i];
                cf = cfg[i];
                if(cf.summaryType){
                    data[c.name] = Ext.ux.grid.GroupSummary.Calculations[cf.summaryType](data[c.name] || 0, r, c.name, data);
                }
            }
        }
        return data;
    },

    doGroupEnd : function(buf, g, cs, ds, colCount){
        var data = this.calculate(g.rs, cs);
        buf.push('</div>', this.renderSummary({data: data}, cs), '</div>');
    },

    doWidth : function(col, w, tw){
        if(!this.isGrouped()){
            return;
        }
        var gs = this.view.getGroups(),
            len = gs.length,
            i = 0,
            s;
        for(; i < len; ++i){
            s = gs[i].childNodes[2];
            s.style.width = tw;
            s.firstChild.style.width = tw;
            s.firstChild.rows[0].childNodes[col].style.width = w;
        }
    },

    doAllWidths : function(ws, tw){
        if(!this.isGrouped()){
            return;
        }
        var gs = this.view.getGroups(),
            len = gs.length,
            i = 0,
            j, 
            s, 
            cells, 
            wlen = ws.length;
            
        for(; i < len; i++){
            s = gs[i].childNodes[2];
            s.style.width = tw;
            s.firstChild.style.width = tw;
            cells = s.firstChild.rows[0].childNodes;
            for(j = 0; j < wlen; j++){
                cells[j].style.width = ws[j];
            }
        }
    },

    doHidden : function(col, hidden, tw){
        if(!this.isGrouped()){
            return;
        }
        var gs = this.view.getGroups(),
            len = gs.length,
            i = 0,
            s, 
            display = hidden ? 'none' : '';
        for(; i < len; i++){
            s = gs[i].childNodes[2];
            s.style.width = tw;
            s.firstChild.style.width = tw;
            s.firstChild.rows[0].childNodes[col].style.display = display;
        }
    },
    
    isGrouped : function(){
        return !Ext.isEmpty(this.grid.getStore().groupField);
    },

    // Note: requires that all (or the first) record in the
    // group share the same group value. Returns false if the group
    // could not be found.
    refreshSummary : function(groupValue){
        return this.refreshSummaryById(this.view.getGroupId(groupValue));
    },

    getSummaryNode : function(gid){
        var g = Ext.fly(gid, '_gsummary');
        if(g){
            return g.down('.x-grid3-summary-row', true);
        }
        return null;
    },

    refreshSummaryById : function(gid){
        var g = Ext.getDom(gid);
        if(!g){
            return false;
        }
        var rs = [];
        this.grid.getStore().each(function(r){
            if(r._groupId == gid){
                rs[rs.length] = r;
            }
        });
        var cs = this.view.getColumnData(),
            data = this.calculate(rs, cs),
            markup = this.renderSummary({data: data}, cs),
            existing = this.getSummaryNode(gid);
            
        if(existing){
            g.removeChild(existing);
        }
        Ext.DomHelper.append(g, markup);
        return true;
    },

    doUpdate : function(ds, record){
        this.refreshSummaryById(record._groupId);
    },

    doRemove : function(ds, record, index, isUpdate){
        if(!isUpdate){
            this.refreshSummaryById(record._groupId);
        }
    },

    /**
     * Show a message in the summary row.
     * <pre><code>
grid.on('afteredit', function(){
    var groupValue = 'Ext Forms: Field Anchoring';
    summary.showSummaryMsg(groupValue, 'Updating Summary...');
});
     * </code></pre>
     * @param {String} groupValue
     * @param {String} msg Text to use as innerHTML for the summary row.
     */
    showSummaryMsg : function(groupValue, msg){
        var gid = this.view.getGroupId(groupValue),
             node = this.getSummaryNode(gid);
        if(node){
            node.innerHTML = '<div class="x-grid3-summary-msg">' + msg + '</div>';
        }
    }
});

//backwards compat
Ext.grid.GroupSummary = Ext.ux.grid.GroupSummary;


/**
 * Calculation types for summary row:</p><div class="mdetail-params"><ul>
 * <li><b><tt>sum</tt></b> : <div class="sub-desc"></div></li>
 * <li><b><tt>count</tt></b> : <div class="sub-desc"></div></li>
 * <li><b><tt>max</tt></b> : <div class="sub-desc"></div></li>
 * <li><b><tt>min</tt></b> : <div class="sub-desc"></div></li>
 * <li><b><tt>average</tt></b> : <div class="sub-desc"></div></li>
 * </ul></div>
 * <p>Custom calculations may be implemented.  An example of
 * custom <code>summaryType=totalCost</code>:</p><pre><code>
// define a custom summary function
Ext.ux.grid.GroupSummary.Calculations['totalCost'] = function(v, record, field){
    return v + (record.data.estimate * record.data.rate);
};
 * </code></pre>
 * @property Calculations
 */

Ext.ux.grid.GroupSummary.Calculations = {
    'sum' : function(v, record, field){
        return v + (record.data[field]||0);
    },

    'count' : function(v, record, field, data){
        return data[field+'count'] ? ++data[field+'count'] : (data[field+'count'] = 1);
    },

    'max' : function(v, record, field, data){
        var v = record.data[field];
        var max = data[field+'max'] === undefined ? (data[field+'max'] = v) : data[field+'max'];
        return v > max ? (data[field+'max'] = v) : max;
    },

    'min' : function(v, record, field, data){
        var v = record.data[field];
        var min = data[field+'min'] === undefined ? (data[field+'min'] = v) : data[field+'min'];
        return v < min ? (data[field+'min'] = v) : min;
    },

    'average' : function(v, record, field, data){
        var c = data[field+'count'] ? ++data[field+'count'] : (data[field+'count'] = 1);
        var t = (data[field+'total'] = ((data[field+'total']||0) + (record.data[field]||0)));
        return t === 0 ? 0 : t / c;
    }
};
Ext.grid.GroupSummary.Calculations = Ext.ux.grid.GroupSummary.Calculations;

/**
 * @class Ext.ux.grid.HybridSummary
 * @extends Ext.ux.grid.GroupSummary
 * Adds capability to specify the summary data for the group via json as illustrated here:
 * <pre><code>
{
    data: [
        {
            projectId: 100,     project: 'House',
            taskId:    112, description: 'Paint',
            estimate:    6,        rate:     150,
            due:'06/24/2007'
        },
        ...
    ],

    summaryData: {
        'House': {
            description: 14, estimate: 9,
                   rate: 99, due: new Date(2009, 6, 29),
                   cost: 999
        }
    }
}
 * </code></pre>
 *
 */
Ext.ux.grid.HybridSummary = Ext.extend(Ext.ux.grid.GroupSummary, {
    /**
     * @private
     * @param {Object} rs
     * @param {Object} cs
     */
    calculate : function(rs, cs){
        var gcol = this.view.getGroupField(),
            gvalue = rs[0].data[gcol],
            gdata = this.getSummaryData(gvalue);
        return gdata || Ext.ux.grid.HybridSummary.superclass.calculate.call(this, rs, cs);
    },

    /**
     * <pre><code>
grid.on('afteredit', function(){
    var groupValue = 'Ext Forms: Field Anchoring';
    summary.showSummaryMsg(groupValue, 'Updating Summary...');
    setTimeout(function(){ // simulate server call
        // HybridSummary class implements updateSummaryData
        summary.updateSummaryData(groupValue,
            // create data object based on configured dataIndex
            {description: 22, estimate: 888, rate: 888, due: new Date(), cost: 8});
    }, 2000);
});
     * </code></pre>
     * @param {String} groupValue
     * @param {Object} data data object
     * @param {Boolean} skipRefresh (Optional) Defaults to false
     */
    updateSummaryData : function(groupValue, data, skipRefresh){
        var json = this.grid.getStore().reader.jsonData;
        if(!json.summaryData){
            json.summaryData = {};
        }
        json.summaryData[groupValue] = data;
        if(!skipRefresh){
            this.refreshSummary(groupValue);
        }
    },

    /**
     * Returns the summaryData for the specified groupValue or null.
     * @param {String} groupValue
     * @return {Object} summaryData
     */
    getSummaryData : function(groupValue){
        var reader = this.grid.getStore().reader,
            json = reader.jsonData,
            fields = reader.recordType.prototype.fields,
            v;
            
        if(json && json.summaryData){
            v = json.summaryData[groupValue];
            if(v){
                return reader.extractValues(v, fields.items, fields.length);
            }
        }
        return null;
    }
});

//backwards compat
Ext.grid.HybridSummary = Ext.ux.grid.HybridSummary;
