/*

Copyright 2008-2011 Clipperz Srl

This file is part of Clipperz Community Edition.
Clipperz Community Edition is an online password manager.
For further information about its features and functionalities please
refer to http://www.clipperz.com.

* Clipperz Community Edition is free software: you can redistribute
  it and/or modify it under the terms of the GNU Affero General Public
  License as published by the Free Software Foundation, either version
  3 of the License, or (at your option) any later version.

* Clipperz Community Edition is distributed in the hope that it will
  be useful, but WITHOUT ANY WARRANTY; without even the implied
  warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the GNU Affero General Public License for more details.

* You should have received a copy of the GNU Affero General Public
  License along with Clipperz Community Edition.  If not, see
  <http://www.gnu.org/licenses/>.

*/

Clipperz.Base.module('Clipperz.PM.UI.Web.Controllers');

Clipperz.PM.UI.Web.Controllers.GridController = function(args) {
	args = args || {};
	
	Clipperz.PM.UI.Web.Controllers.GridController.superclass.constructor.call(this, args);
	
	this._grid = null;
	this._user = null;
	this._sortedColumnManager = null;
	this._cachedObjects = null;
	this._filterController = args.filterController || null;

	this._deferredDisplaySelectedRowsInvocation = null;
	
	return this;
};

Clipperz.Base.extend(Clipperz.PM.UI.Web.Controllers.GridController, Object, {

	'toString': function() {
		return "Clipperz.PM.UI.Web.Controllers.GridController";
	},

	//-----------------------------------------------------------------------------

	'createGrid': function () {
		throw Clipperz.Base.exception.AbstractMethod;
	},
	
	'setupWithGrid': function (aGrid) {
		this._grid = aGrid;
		
		if (this._grid != null) {
			MochiKit.Iter.forEach(this.columnsManagers(), function (aColumnManager) {
				if (aColumnManager.isSortable()) {
					if (aColumnManager.isSorted()) {
						this.setSortedColumnManager(aColumnManager);
					}
					MochiKit.Signal.connect(aColumnManager, 'sort', this, 'handleColumnManagerSort');
				}
				MochiKit.Signal.connect(aColumnManager, 'selectRow', this, 'handleColumnManagerSelectRow');
				MochiKit.Signal.connect(aColumnManager, 'unselectRow', this, 'handleColumnManagerUnselectRow');
			}, this);
		}
	},

	'grid': function() {
		if (this._grid == null) {
			this.setupWithGrid(this.createGrid());
		}
		
		return this._grid;
	},
	
	'filterController': function () {
//Clipperz.log('GridController.filterController >>>', this._filterController);
		if (this._filterController == null) {
			this._filterController = new Clipperz.PM.UI.Web.Controllers.FilterController();
		}
//Clipperz.log('GridController.filterController <<<', this._filterController);
		return this._filterController;
	},

	//-----------------------------------------------------------------------------

	'columnsManagers': function () {
		return this.grid().columnsManagers();
	},

	'columnManagerWithName': function (aName) {
		var	managers;
		var result;
		
		managers = MochiKit.Base.filter(function (aManager) { return aManager.name() == aName; } , this.columnsManagers());
		
		if (managers.length == 1) {
			result = managers[0];
		} else if (managers.length == 0) {
			result = null;
		} else {
			throw "WTF!!!";
		}
		
		return result;
	},

	'sortedColumnManager': function () {
		return this._sortedColumnManager;
	},
	
	'setSortedColumnManager': function(aValue) {
		if (aValue.sorted() != 'UNSORTED') {
			this._sortedColumnManager = aValue;
		} else {
			this._sortedColumnManager = null;
		}
	},

	//-----------------------------------------------------------------------------

	'handleColumnManagerSort': function(aSelectedColumnManager) {
		MochiKit.Iter.forEach(this.columnsManagers(), function(aColumnManager) {
			if (aSelectedColumnManager != aColumnManager) {
				if (aColumnManager.isSortable()) {
					aColumnManager.setSorted('UNSORTED');
				}
			}
		});
		
		aSelectedColumnManager.toggleSorting();
		this.setSortedColumnManager(aSelectedColumnManager);

		this.displaySelectedRows(this.filterController().getFilter());
	},

	'handleColumnManagerSelectRow': function (aRowObject) {
		this.grid().selectRow(aRowObject);
	},

	'handleColumnManagerUnselectRow': function (aRowObject) {
		this.grid().unselectRow(aRowObject);
	},
	
	//-----------------------------------------------------------------------------

	'handleFilterUpdated': function (aFilter) {
		if (this.grid().isActive()) {
			this.displaySelectedRows(aFilter);
		}
	},

	//-----------------------------------------------------------------------------
	//	TODO: relying on user() in GridController, bad code smell :|
	//	mhh: a controller should have access to business logic object too. Otherwise it will fail its controller role. [Giulio Cesare]

	'setUser': function(anUser) {
		this._user = anUser;
	},
	
	'user': function() {
		return this._user;
	},

	//-----------------------------------------------------------------------------

	'run': function(args) {
//Clipperz.log("=== GridController.run");
		var deferredResult;

		this.setUser(args.user);
		args.slot.setContent(this.grid());
		this.filterController().registerFilterElement(this.grid().filterElement());
		MochiKit.Signal.connect(this.filterController(), 'filterUpdated', this, 'handleFilterUpdated');
		
		return this.displaySelectedRows();
	},

	//-----------------------------------------------------------------------------

	'handleGenericError': function(anError) {
		var result;
		
		if (anError instanceof MochiKit.Async.CancelledError) {
			result = anError;
		} else {
Clipperz.log("## GridController - GENERIC ERROR" + "\n" + "==>> " + anError + " <<==\n" + anError.stack);
			result = new MochiKit.Async.CancelledError(anError);
		}
	
		return result;
	},

	//-----------------------------------------------------------------------------
	
	'getRows': function () {
		throw Clipperz.Base.AbstractMethod;
	},
	
	//-----------------------------------------------------------------------------

	'setDeferredDisplaySelectedRowsInvocation': function (aDeferred) {
		if (this._deferredDisplaySelectedRowsInvocation != null) {
			this._deferredDisplaySelectedRowsInvocation.cancel();
		}
		
		this._deferredDisplaySelectedRowsInvocation = aDeferred;
	},
	
	//-----------------------------------------------------------------------------
	
	'resetDeferredDisplaySelectedRowsInvocation': function () {
		if (this._deferredDisplaySelectedRowsInvocation != null) {
			this._deferredDisplaySelectedRowsInvocation.cancel();
		}
	},
	
	//-----------------------------------------------------------------------------
	
	'_displaySelectedRows': function (aFilter, someRows) {
		var result;
		var delay;
		
		if ((aFilter != null) && (aFilter != '')) {
			var filter;
			var	filterRegExp;
			
			filter = aFilter.replace(/[^A-Za-z0-9]/g, "\\$&");
			filterRegExp = new RegExp(filter, "i");
			result = MochiKit.Base.filter(function (aCachedResult) { return filterRegExp.test(aCachedResult['_searchableContent'])}, someRows);
			delay = 0.002*result.length;

			this.setDeferredDisplaySelectedRowsInvocation(MochiKit.Async.callLater(delay, MochiKit.Base.method(this, "deferredDisplaySelectedRows", result)));
		} else {
			result = someRows;

			this.resetDeferredDisplaySelectedRowsInvocation();
			this.deferredDisplaySelectedRows(result);
		}

	},

	//-----------------------------------------------------------------------------
	
	'deferredDisplaySelectedRows': function (someRows) {
		if (this.sortedColumnManager() != null) {
			var comparator;
			var fieldName;
			
			fieldName = this.sortedColumnManager().name();
			comparator = this.sortedColumnManager().comparator();
			if (this.sortedColumnManager().sorted() == 'DESCENDING') {
				comparator = Clipperz.Base.reverseComparator(comparator);
			}

			someRows.sort(MochiKit.Base.partial(function(aKey, aComparator, aObject, bObject){
				return comparator(aObject[aKey], bObject[aKey]);
			}, this.sortedColumnManager().name(), comparator));
		}

		this.grid().update(someRows);
		this.grid().endSearch();
	},

	//-----------------------------------------------------------------------------

	'getCachedValues': function () {
		var deferredResult;

		if (this._cachedObjects != null) {
			deferredResult = MochiKit.Async.succeed(this._cachedObjects);
		} else {
			var objectCollectResultsConfiguration;
			
			objectCollectResultsConfiguration = {
				'_rowObject':			MochiKit.Async.succeed,
				'_reference':			MochiKit.Base.methodcaller('reference'),
				'_searchableContent':	MochiKit.Base.methodcaller('searchableContent')
			};

			MochiKit.Base.map(function (aColumnManager) {
				objectCollectResultsConfiguration[aColumnManager.name()] = aColumnManager.selector();
			}, this.columnsManagers());

			deferredResult = new Clipperz.Async.Deferred("GridController.getCachedValues", {trace:false});
			deferredResult.addMethod(this, 'getRows');
			deferredResult.addCallback(MochiKit.Base.map, Clipperz.Async.collectResults("GridController.getCachedValues - collectResults", objectCollectResultsConfiguration, {trace:false}));
			deferredResult.addCallback(Clipperz.Async.collectAll);
			deferredResult.addCallback(MochiKit.Base.bind(function (someRows) {
				this._cachedObjects = someRows;
				return this._cachedObjects;
			}, this));
			deferredResult.callback();
		}
		
		return deferredResult;
	},

	//-----------------------------------------------------------------------------

	'hasPendingChanges': function () {
		return this.user().hasPendingChanges();
	},

	'saveChanges': function () {
		this._cachedObjects = null;

		return Clipperz.Async.callbacks("GridController.saveChanges", [
			MochiKit.Base.method(this.user(), 'saveChanges'),
			MochiKit.Base.method(this, 'focus')
		], {trace:false});
	},
	
	'revertChanges': function () {
		return this.user().revertChanges();
	},
	
	//-----------------------------------------------------------------------------

	'displayEmptyContent': function () {
	},

	'hideEmptyContent': function () {
		this.grid().removeNoRowsGridComponent();
	},

	'displaySelectedRows': function (aFilter) {
		if ((aFilter != null) && (aFilter != '')){
			this.grid().startSearch();
		}

		return Clipperz.Async.callbacks("GridController.displaySelectedrows", [
			MochiKit.Base.method(this, 'getCachedValues'),
			MochiKit.Base.itemgetter('length'),
			Clipperz.Async.deferredIf("There are some items to show in the grid", [
				MochiKit.Base.method(this, 'hideEmptyContent'),
				MochiKit.Base.method(this, 'getCachedValues'),
				MochiKit.Base.method(this, '_displaySelectedRows', aFilter)
			], [
				MochiKit.Base.method(this, 'displayEmptyContent'),
				MochiKit.Base.method(this.grid(), 'endSearch')
			])
		], {trace:false});
	},

	//-----------------------------------------------------------------------------

	'focus': function () {
		return Clipperz.Async.callbacks("GridController.focus", [
			MochiKit.Base.method(this, 'displaySelectedRows', this.filterController().getFilter()),
			MochiKit.Base.method(this.grid(), 'focus')
		], {trace:false})
//*##*/	this.displaySelectedRows(this.filterController().getFilter());
//		this.grid().focus();
	},

	//=============================================================================

	'deleteAllCleanTextData': function () {
		this._cachedObjects = null;
		this.grid().drawEmpty();
	},

	//=============================================================================
	__syntaxFix__: "syntax fix"
});