Ext.ux.SchemaGrid = Ext.extend(Ext.grid.GridPanel, {
	initComponent: function() {
		var me = this,
			schema = me.initialConfig.schema,
			fields = schema.fields,
			id = Ext.id();


		var store = new Ext.data.JsonStore({
			root: 'list',
			totalProperty: 'count',
			idProperty: schema.primaryKey,
			url: '/Server',
			baseParams: {
				method: me.initialConfig.method,
			},
			fields: fields,
			listeners: {
				load: function() {
					me.updateToolbar();
				}
			}
		});
		var sm = new Ext.grid.RowSelectionModel({
			singleSelect: false,
			listeners: {
				rowselect: function() {
					me.updateToolbar();
				},
				rowdeselect: function() {
					me.updateToolbar();
				}
			}
		});
  		var columns = [],
			fieldHash = {};
		var autoExpandColumn = undefined;
		for (var i in fields) {
			var field = fields[i];
			fieldHash[field.name] = field;
			if (field.header && !field.serverOnly) {
				if (field.autoExpand) {
					autoExpandColumn = field.name;
				}
				columns.push({
					header: field.header,
					id: field.name,
					format: field.format,
					dataIndex: field.name,
					width: field.width,
					renderer: me.renderField
				});
			}
		}
		var config = {
			sm: sm,
			store: store,
			columns: columns,
			autoSizeColumns: true,
			autoFill: true,
			stripeRows: true,
			trackMouseOver: true,
			loadMask: true,
			autoExpandColumn: autoExpandColumn,
			buttonId: id
		};
		Ext.apply(this, Ext.apply(this.initialConfig, config));
		me.tbar = new Ext.Toolbar({
			items: [
				{
					text: 'Add',
					id: 'add-'+id,
					handler: function() {
						me.editRecord({});
					}
				},
				{
					text: 'Edit',
					id: 'edit-'+id,
					handler: function() {
						me.editRecord(me.getSelectionModel().getSelected().data);
					}
				},
				{
					text: 'Delete',
					id: 'delete-'+id,
					handler: function() {
						me.deleteRecords();
					}
				}
			]
		});
		me.bbar = new Ext.PagingToolbar({
			store: store,
			pageSize: 25,
			displayInfo: true,
			displayMsg: 'Displaying ' + me.initialConfig.schema.name + '{0} - {1} of {2}',
			beforePageText: 'Page',
			emptyMsg: 'Nothing to Display'
		});
		Ext.ux.SchemaGrid.superclass.initComponent.apply(me, arguments);
		me.on({
			'render': function() {
				store.reload();
			}
		});
		me.fieldHash = fieldHash;
	},
	updateToolbar: function() {
		var me = this,
			id = this.buttonId;
		var selections = me.getSelectionModel().getSelections();
		if (selections.length) {
			Ext.getCmp('delete-'+id).enable();
			if (selections.length == 1) {
				Ext.getCmp('edit-'+id).enable();
			}
			else {
				Ext.getCmp('edit-'+id).disable();
			}
		}
		else {
			Ext.getCmp('delete-'+id).disable();
			Ext.getCmp('edit-'+id).disable();
		}
	},
	editRecord: function(record) {
		var me = this,
			id = Ext.id(),
			schema = me.initialConfig.schema,
			fields = schema.fields,
			primaryKey = schema.primaryKey;
		record = record || {};
		var items = [];
		for (i in fields) {
			var field = fields[i];
			if (field.header && field.editable) {
				items.push({
					xtype: 'textfield',
					fieldLabel: field.header,
					anchor: '100%',
					id: field.name + '-' + id,
					name: field.name,
					value: record[field.name]
				})
			}
		}
		var dialog = new Ext.Window({
			title: record[primaryKey] ? 'Edit Record' : 'Add Record',
			width: 640,
			height: 480,
			modal: true,
			layout: 'fit',
			items: [
				{
					xtype: 'form',
					frame: true,
					labelWidth: 150,
					items: items
				}
			],
			buttonAlign: 'center',
			buttons: [
				{
					text: 'OK',
					handler: function() {
						for (var i=0, len = items.length; i<len; i++) {
							var cmp = Ext.getCmp(items[i].id);
							if (cmp) {
								record[items[i].name] = cmp.getValue();
							}
						}
						Ext.Ajax.request({
							url: '/Server',
							params: {
								method: 'editUser',
								example: Ext.encode(record)
							},
							success: function(response) {
								dialog.close();
								me.store.reload();
							}
						});
					}
				},
				{
					text: 'Cancel',
					handler: function() {
						dialog.close();
					}
				}
			]
		});
		dialog.show();
	},
	deleteRecords: function() {
		var me = this,
			records = me.getSelectionModel().getSelections(),
			len = records.length;
		var examples = [];
		for (var i=0; i<len; i++) {
			examples.push(records[i].data);
		}
		Ext.Ajax.request({
			url: '/Server',
			params: {
				method: 'deleteUsers',
				examples: Ext.encode(examples)
			},
			success: function(response) {
				me.store.reload();
			}
		});
	},
	renderField: function(value, p, r) {
		var me = this,
			format = me.format;
		switch (format) {
			case 'DateTime':
				return new Date(value*1000).toString();
			default:
				return value;
		}
	}
});


Ext.reg('ext-ux-schemagrid', Ext.ux.SchemaGrid);