/**
 * Private class which acts as a HeaderContainer for the Lockable which aggregates all columns
 * from both sides of the Lockable. It is never rendered, it's just used to interrogate the
 * column collection.
 * @private
 */
Ext.define('Ext.grid.locking.HeaderContainer', {
    extend: 'Ext.grid.header.Container',
    requires: [
        'Ext.grid.ColumnManager'
    ],
 
    headerCtRelayEvents: [
        "blur",
        "focus",
        "move",
        "resize",
        "destroy",
        "beforedestroy",
        "boxready",
        "afterrender",
        "render",
        "beforerender",
        "removed",
        "hide",
        "beforehide",
        "show",
        "beforeshow",
        "enable",
        "disable",
        "added",
        "deactivate",
        "beforedeactivate",
        "activate",
        "beforeactivate",
        "remove",
        "add",
        "beforeremove",
        "beforeadd",
        "afterlayout",
        "menucreate",
        "sortchange",
        "columnschanged",
        "columnshow",
        "columnhide",
        "columnmove",
        "headertriggerclick",
        "headercontextmenu",
        "headerclick",
        "columnresize",
        "statesave",
        "beforestatesave",
        "staterestore",
        "beforestaterestore"
    ],
 
    constructor: function(lockable) {
        var me = this,
            lockedGrid = lockable.lockedGrid,
            normalGrid = lockable.normalGrid;
 
        me.lockable = lockable;
        me.callParent();
 
        // Create the unified column manager for the lockable grid assembly 
        lockedGrid.visibleColumnManager.rootColumns =
            normalGrid.visibleColumnManager.rootColumns =
            lockable.visibleColumnManager =
            me.visibleColumnManager = new Ext.grid.ColumnManager(true, lockedGrid.headerCt, normalGrid.headerCt);
            
        lockedGrid.columnManager.rootColumns =
            normalGrid.columnManager.rootColumns =
            lockable.columnManager =
            me.columnManager = new Ext.grid.ColumnManager(false, lockedGrid.headerCt, normalGrid.headerCt);
 
        // Relay *all* events from the two HeaderContainers 
        me.lockedEventRelayers = me.relayEvents(lockedGrid.headerCt, me.headerCtRelayEvents);
        me.normalEventRelayers = me.relayEvents(normalGrid.headerCt, me.headerCtRelayEvents);
    },
    
    destroy: function() {
        var me = this;
        
        Ext.destroy(me.lockedEventRelayers, me.normalEventRelayers);
        me.lockedEventRelayers = me.normalEventRelayers = null;
        
        me.callParent();
    },
 
    getRefItems: function() {
        return this.lockable.lockedGrid.headerCt.getRefItems().concat(this.lockable.normalGrid.headerCt.getRefItems());
    },
 
    // This is the function which all other column access methods are based upon 
    // Return the full column set for the whole Lockable assembly 
    getGridColumns: function() {
        return this.lockable.lockedGrid.headerCt.getGridColumns().concat(this.lockable.normalGrid.headerCt.getGridColumns());
    },
 
    // Lockable uses its headerCt to gather column state 
    getColumnsState: function () {
        var me = this,
            locked = me.lockable.lockedGrid.headerCt.getColumnsState(),
            normal = me.lockable.normalGrid.headerCt.getColumnsState();
 
        return locked.concat(normal);
    },
 
    // Lockable uses its headerCt to apply column state 
    applyColumnsState: function (columnsState, storeState) {
        var me             = this,
            lockedGrid     = me.lockable.lockedGrid,
            lockedHeaderCt = lockedGrid.headerCt,
            normalHeaderCt = me.lockable.normalGrid.headerCt,
            columns        = lockedHeaderCt.items.items.concat(normalHeaderCt.items.items),
            length         = columns.length,
            i, column,
            switchSides,
            colState,
            lockedCount;
 
        // Loop through the column set, applying state from the columnsState object. 
        // Columns which have their "locked" property changed must be added to the appropriate 
        // headerCt. 
        for (i = 0; i < length; i++) {
            column = columns[i];
            colState = columnsState[column.getStateId()];
            if (colState) {
 
                // See if the state being applied needs to cause column movement 
                // Coerce possibly absent locked config to boolean. 
                switchSides = colState.locked != null && Boolean(column.locked) !== colState.locked;
 
                if (column.applyColumnState) {
                    column.applyColumnState(colState, storeState);
                }
 
                // If the column state means it has to change sides 
                // move the column to the other side 
                if (switchSides) {
                    (column.locked ? lockedHeaderCt : normalHeaderCt).add(column);
                }
            }
        }
        lockedCount = lockedHeaderCt.items.items.length;
 
        // We must now restore state in each side's HeaderContainer. 
        // This means passing the state down into each side's applyColumnState 
        // to get sortable, hidden and width states restored. 
        // We must ensure that the index on the normal side is zero based. 
        for (i = 0; i < length; i++) {
            column = columns[i];
            colState = columnsState[column.getStateId()];
            if (!column.locked) {
                colState.index -= lockedCount;
            }
        }
 
        // Each side must apply individual column's state 
        lockedHeaderCt.applyColumnsState(columnsState, storeState);
        normalHeaderCt.applyColumnsState(columnsState, storeState);
    },
 
    disable: function() {
        var topGrid = this.lockable;
 
        topGrid.lockedGrid.headerCt.disable();
        topGrid.normalGrid.headerCt.disable();
    },
 
    enable: function() {
        var topGrid = this.lockable;
 
        topGrid.lockedGrid.headerCt.enable();
        topGrid.normalGrid.headerCt.enable();
    }
});