/**
 * Renames instance names, layers, library items with easy 3-step wizard.
 * @version 1.1
 * @author: Mark Knol - http://blog.stroep.nl
 */ 

var doc = fl.getDocumentDOM();
var selectedInstance;

if (!doc) 
{
	alert("Please open or create a flashfile.");
} 
else 
{
	NameItRight();
}

function NameItRight()
{
	if (!doc.selection || !doc.selection[0]) 
	{
		alert("You need to select one instance on stage to do the magic.");
		return;
	}
	else if (doc.selection.length != 1)
	{
		alert("You may have no more than one stage element selected. You need to select one instance on stage to do the magic.");
		return;
	}
	
	selectedInstance = doc.selection[0];
	var base;
	
	if (!selectedInstance.libraryItem)
	{
		alert("Your selection is not a library item; First convert it to a symbol");
		return;
	}
	
	var selectedInstanceLibraryItem = selectedInstance.libraryItem;
	if (!selectedInstanceLibraryItem.linkageImportForRS )
	{
		var newInstanceLibraryName;
		if (confirm('1/3 : Rename library symbol name?\n\nCurrent symbol name: "' + selectedInstanceLibraryItem.name + '"'))
		{
			newInstanceLibraryName = prompt('Type new symbol name. ', selectedInstanceLibraryItem.name);
			if (newInstanceLibraryName) 
			{
				selectedInstanceLibraryItem.name = newInstanceLibraryName;
				if (selectedInstanceLibraryItem.linkageExportForAS) selectedInstanceLibraryItem.linkageClassName = getClassPackageName(selectedInstanceLibraryItem) + '.' + getClassName(selectedInstanceLibraryItem);
			}
		}
		if (confirm('2/3 : The library symbol "' +selectedInstanceLibraryItem.name+ '" ' + (selectedInstanceLibraryItem.linkageExportForAS ? 'already has a base class, change it?\n\nCurrent base class: "' +  selectedInstanceLibraryItem.linkageBaseClass + '"' : 'has no Base Class, add it?')))
		{
			base = prompt('Choose a base class.', selectedInstanceLibraryItem.linkageExportForAS ? selectedInstanceLibraryItem.linkageBaseClass : 'flash.display.MovieClip');
			
			if (base)
			{
				if (!selectedInstanceLibraryItem.linkageExportForAS) 
				{
					selectedInstanceLibraryItem.linkageExportForAS = true;
					selectedInstanceLibraryItem.linkageClassName = getClassPackageName(selectedInstanceLibraryItem) + '.' + getClassName(selectedInstanceLibraryItem);
				}
				selectedInstanceLibraryItem.linkageBaseClass = base;
			}
			else
			{
				alert('No instance name set, library item not changed');
				return;
			}
		}
		else
		{
			base = selectedInstanceLibraryItem.name;
		}
	}
	else
	{
		alert('1/3 : The name of a shared asset cannot be changed.');
	}
	
	if (confirm('3/3 : Rename instance name across timeline?'))
	{
		var newInstanceName = prompt('Enter new instance name.', 'mc' + upperCaseFirstLetter(selectedInstanceLibraryItem.name));
		if (newInstanceName) renameAcrossLayer(newInstanceName, doc);
	}

	function upperCaseFirstLetter(value)
	{
		return value.substring(0, 1).toUpperCase() + value.substr(1, selectedInstanceLibraryItem.name.length - 1);
	}
	
	function getClassPackageName(item)
	{
		var retval = doc.name.toLowerCase().split('.fla')[0]
		if (retval) retval = retval.split('..').join('.').split(' ').join('').split('-').join('_').toLowerCase();
		return retval;
	}
	
	function getClassName(item)
	{
		var retval = item.name.substr(item.name.lastIndexOf('/') + 1);
		retval = retval.substr(0, 1).toUpperCase() + retval.substr(1);
		retval = retval.split('.').join('').split(' ').join('');
		return retval;
	}
	
	function renameAcrossLayer(instancename, doc)
	{
		var timeline = doc.getTimeline();
		var selectedFrame = timeline.getSelectedFrames();
		var layer = timeline.layers[timeline.currentLayer];
		layer.name = instancename;
		var framesList = layer.frames;

		var layerList = [];
		for (var i = 0, total = timeline.layers.length; i < total; i++)
		{
			layerList.push(timeline.layers[i].locked);
		}

		timeline.setLayerProperty("locked", true, "others");
		timeline.setLayerProperty("locked", false, "selected");

		for (var i = 0, total = framesList.length; i < total; i++)
		{
			var frameListItem = framesList[i];
			var frameListItemElements = frameListItem.elements;
			if (frameListItemElements.length > 1)
			{
				alert("There is more than one item on frame " + (i + 1) + ".\nRenaming instance names only works with layers containing one instance across frames.");
				break;
			}
			else
			{
				if (frameListItemElements.length > 0)
				{
					var frameListItemElement = frameListItemElements[0];
					var symbolname = frameListItemElement.libraryItem.name;
					
					doc.selectNone();
					
					if (selectedInstanceLibraryItem.name == symbolname && frameListItem.startFrame == i)
					{
						timeline.setSelectedFrames(i, i + 1);
						doc.selectAll();
						doc.selection[0].name = instancename;
					}
				}
			}
		}

		for (var i = 0, total = layerList.length; i < total; i++)
		{
			timeline.setSelectedLayers(i, i);
			timeline.setLayerProperty("locked", layerList[i], "selected");
		}

		timeline.setSelectedFrames(selectedFrame, selectedFrame + 1);
	}
};