var document = fl.getDocumentDOM();
var level = 0;
var optimized = 0;
var original = 0;
var quality = 1;

function main() {
	
	var summary;
	
	clear();
	
	quality = prompt('Choose a quality setting, between .5 (fewer control points) and 20 (more control points).', 10);
	quality = (isNaN(Number(quality)) || quality === false || quality === '') ? 10 : Number(quality);
	quality = Math.min(quality, 20);
	quality = Math.max(quality, .5);
	
	fl.showIdleMessage(false);
	optimizeSymbols();
	fl.showIdleMessage(true);
//	optimizeFrame(document.getTimeline().currentLayer, document.getTimeline().currentFrame);
	
	summary = 'Original: %original, Optimized: %optimized, Ratio: %ratio%';
	summary = summary.replace('%original', original);
	summary = summary.replace('%optimized', optimized);
	summary = summary.replace('%ratio', Math.round((1 - (optimized / original)) * 100));
	trace(summary);
	
}

function optimizeSymbols() {
	var item;
	var itemList = document.library.getSelectedItems();
	if(!itemList.length) itemList = document.library.items.concat();
	var itemIndex = itemList.length;
	if(itemIndex && confirm('Are you sure you want to optimize %count symbols? This may take a very long time.'.replace('%count', itemIndex))) {
		while(itemIndex--) {
			item = itemList[itemIndex];
			if(item.itemType === 'graphic' || item.itemType === 'movie clip') {
				document.library.editItem(item.name);
				trace('Optimizing symbol: %name'.replace('%name', item.name));
				optimizeTimeline();
				document.exitEditMode();
			}
		}
	}
}

function optimizeTimeline() {
	
	var layerIndex;
	var timeline;
	
	timeline = document.getTimeline();
	document.zoomFactor = quality;
	
	layerIndex = timeline.layers.length;
	if(layerIndex) {
		while(layerIndex--) {
			optimizeLayer(layerIndex);
		}
	}
	
	document.zoomFactor = 1;
	
}

function optimizeLayer(layerIndex) {
	
	var frameIndex;
	var layer;
	var locked;
	var timeline;
	var visible;
	
	timeline = document.getTimeline();
	layer = timeline.layers[layerIndex];
	locked = layer.locked;
	visible = layer.visible;
	
	layer.locked = false;
	layer.visible = true;
	
	frameIndex = layer.frames.length;
	if(frameIndex) {
		while(frameIndex--) {
			optimizeFrame(layerIndex, frameIndex);
		}
	}
	
	layer.locked = locked;
	layer.visible = visible;
	
}

function optimizeFrame(layerIndex, frameIndex) {
	
	var element;
	var elementIndex;
	var frame;
	var layer;
	var timeline;
	
	timeline = document.getTimeline();
	timeline.currentLayer = layerIndex;
	timeline.currentFrame = frameIndex;
	layer = timeline.layers[layerIndex];
	frame = layer.frames[frameIndex];
	
	if(frameIndex === frame.startFrame) {
		
		document.selectNone();
		document.selection = frame.elements.concat();
		deleteEmptyShapes();
		document.selectNone();
		
		elementIndex = frame.elements.length;
		if(elementIndex) {
			while(elementIndex--) {
				document.selectNone();
				optimizeElement(layerIndex, frameIndex, elementIndex);
				document.selectNone();
			}
		}
		
		elementIndex = frame.elements.length;
		if(elementIndex > 1) {
			while(elementIndex--) {
				document.selectNone();
				document.selection = [frame.elements[elementIndex]];
				document.arrange('front');
				document.selectNone();
			}
		}
		
	}
	
}

function optimizeElement(layerIndex, frameIndex, elementIndex) {
	
	var element;
	var frame;
	var layer;
	var timeline;
	
	timeline = document.getTimeline();
	timeline.currentLayer = layerIndex;
	timeline.currentFrame = frameIndex;
	layer = timeline.layers[layerIndex];
	frame = layer.frames[frameIndex];

	document.selectNone();
	document.selection = [frame.elements[elementIndex]];
	element = frame.elements[elementIndex];
	
	if(element.elementType === 'shape') {
		if(element.isGroup) {
			level++;
			document.convertToSymbol('graphic','tmp' + level, 'top left');
			document.enterEditMode('inPlace');
			document.breakApart();
			optimizeTimeline();
			if(document.getTimeline().layers[0].frames[0].elements.length > 0) {
				document.selectAll();
				document.group();
				document.exitEditMode();
				document.breakApart();
			} else {
				document.exitEditMode();
				document.selection = [frame.elements[frame.elements.length - 1]];
				document.deleteSelection();
			}
			document.library.deleteItem('tmp' + level);
			level--;
		} else {
			original += element.vertices.length;
			document.optimizeCurves(0, true);
			document.setSelectionRect({ top: 0, right: 0, bottom: 0, left: 0 }); // fix selection bug
			if(frame.elements[elementIndex]) {
				optimized += frame.elements[elementIndex].vertices.length;
			}
		} 
	} else {
		document.arrange('front');
	}

}

function deleteEmptyShapes() {
	
	var element;
	var elementsToKeep
	var elementsToDelete
	var index;
	
	elementsToKeep = new Array();
	elementsToDelete = new Array();
	
	if(document.selection && (index = document.selection.length)) {
		while(index--) {
			element = document.selection[index];
			if(element.elementType === 'shape' && element.width === 0 && element.height === 0) {
				elementsToDelete.push(element);
			} else {
				elementsToKeep.push(element);
			}
		}
		document.setSelectionRect({ top: 0, right: 0, bottom: 0, left: 0 });
		document.selectNone();
		if(elementsToDelete.length > 0) {
			document.selection = elementsToDelete;
			document.deleteSelection();
		}
		document.selection = elementsToKeep;
	}
	
}

function clear() {
	fl.outputPanel.clear();
}

function trace() {
	var list = Array.prototype.concat;
	var index = arguments.length;
	while(index && index--) {
		if(arguments[index] === undefined) {
			 arguments[index] = 'undefined';
		} else if(arguments[index] === null) {
			arguments[index] = 'null';
		}
	}
	fl.outputPanel.trace([].join.call(arguments, ' '));
}

main();