/*
SelectedLayersRenamer.jsx
version .92
A Green Digital Entrustment (crgreen.com)
*/
var win = new Window('palette', 'Layer Rename',[300,100,645,362]);
var w = buildUI();
if (w != null) {
	w.show();
}

function buildUI() {
	if (win != null) {
		win.nameSearchLabel = win.add('statictext', [14,15,314,37], 'Search in Names:');
		win.nameSearchT = win.add('edittext', [25,40,325,62], '');
		win.nameReplaceLabel = win.add('statictext', [14,73,314,95], 'Replace with:');
		win.nameReplaceT = win.add('edittext', [25,98,325,120], '');
		win.typePnl = win.add('panel', [16,138,206,243], 'Rename Type:');
		
		win.repRad = win.typePnl.add('radiobutton', [14,13,174,35], 'Search and Replace');
		win.repRad.value = true;
		win.repRad.onClick = function () {
			doTextChange(win.nameSearchLabel, 'Search in Names:');
			doTextChange(win.nameReplaceLabel, 'Replace with:');
		};
		win.appRad = win.typePnl.add('radiobutton', [14,39,174,61], 'Append');
		win.appRad.onClick = function () {
			doTextChange(win.nameSearchLabel, 'Append Head with:');
			doTextChange(win.nameReplaceLabel, 'Append Tail with:');
		};
		win.remRad = win.typePnl.add('radiobutton', [14,65,174,87], 'Remove # of Characters');
		win.remRad.onClick = function () {
			doTextChange(win.nameSearchLabel, 'Remove this many chars from head (number):');
			doTextChange(win.nameReplaceLabel, 'Remove this many chars from tail (number):');
		};
		win.okBtn = win.add('button', [240,220,320,242], 'OK', {name:'OK'});
		win.okBtn.onClick = function () { doRenaming(this.parent); };
		
		win.cancBtn = win.add('button', [240,185,320,207], 'Close', {name:'Cancel'});
		win.cancBtn.onClick = function () {this.parent.close(1)};
	}
	return win
}

function doTextChange(target, newText) {
	target.text = newText;
}

function doRenaming(theDialog) {
	// make sure a comp is selected
	var activeItem = app.project.activeItem;
	if (activeItem == null || !(activeItem instanceof CompItem)){
		alert("You need to select some layers first.");
	} else {
		
		var s = activeItem.selectedLayers;
		var selNum = s.length;
		if (selNum < 2) {
			alert("You need to select at least two layers first.");
		} else {
			
			app.beginUndoGroup("layer rename");
			var inputError = false;
			
			for (var n = (selNum-1); n >= 0; n--) {
				if ( ! inputError ) {
					item = s[n];
					oldName = item.name;
					sear = theDialog.nameSearchT.text;
					repl = theDialog.nameReplaceT.text
					newName = oldName;
					
					if (theDialog.repRad.value) {
						//keep renaming until searchstring is no longer in name:
						
						while (newName.indexOf(sear) != -1) {
							newName = (newName.replace(sear, repl));
							//names should not be over 25 chars long, so we trim if we need to
						}
						newName=(newName.substr(0,25));
					} else if (theDialog.appRad.value) {
						newName=(sear + oldName + repl );
					} else if (theDialog.remRad.value) {
						if (sear == "") {sear = 0;}
						if (repl == "") {repl = 0;}
						sear = ( parseInt(sear) );
						repl = ( parseInt(repl) );
						if ( (isNaN(sear)) || (isNaN(repl)) ) {
							alert('Error: Not a number?');
							inputError = true;
						} else {
							newName=(newName.substr( sear, oldName.length-repl ));
						}
					}
					
					//////////////////////
					item.name = newName;
					//////////////////////
				}
			}
			
			app.endUndoGroup();
			
		}
	}
	
}