/*******************************************************************************
 * Copyright (c) 2010 Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is made available under the terms of the
 * Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Red Hat, Inc. - initial API and implementation
 ******************************************************************************/
package org.jboss.tools.cdi.ui.marker;

import java.text.MessageFormat;

import org.eclipse.core.resources.IFile;
import org.eclipse.jdt.core.Flags;
import org.eclipse.jdt.core.IBuffer;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IMethod;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.Signature;
import org.eclipse.jdt.core.refactoring.CompilationUnitChange;
import org.eclipse.swt.graphics.Image;
import org.eclipse.text.edits.InsertEdit;
import org.eclipse.text.edits.MultiTextEdit;
import org.eclipse.text.edits.ReplaceEdit;
import org.jboss.tools.cdi.core.CDIConstants;
import org.jboss.tools.cdi.core.CDIImages;
import org.jboss.tools.cdi.ui.CDIUIMessages;
import org.jboss.tools.cdi.ui.CDIUIPlugin;
import org.jboss.tools.common.EclipseUtil;
import org.jboss.tools.common.refactoring.BaseMarkerResolution;
import org.jboss.tools.common.refactoring.MarkerResolutionUtils;

/**
 * @author Daniel Azarov
 */
public class AddLocalBeanMarkerResolution extends BaseMarkerResolution {
	private static final String PUBLIC = "public";  //$NON-NLS-1$
	private static final String PRIVATE = "private";  //$NON-NLS-1$
	private static final String PROTECTED = "protected";  //$NON-NLS-1$
	private static final String SPACE = " ";  //$NON-NLS-1$
	
	private IMethod method;
	private IFile file;
	
	public AddLocalBeanMarkerResolution(IMethod method, IFile file){
		this.label = MessageFormat.format(CDIUIMessages.ADD_LOCAL_BEAN_MARKER_RESOLUTION_TITLE, new Object[]{method.getDeclaringType().getElementName()});
		this.method = method;
		this.file = file;
		init();
	}

	@Override
	protected ICompilationUnit getCompilationUnit(){
		return EclipseUtil.getCompilationUnit(file);
	}

	@Override
	protected CompilationUnitChange getChange(ICompilationUnit compilationUnit){
		CompilationUnitChange change = new CompilationUnitChange("", compilationUnit);
		
		MultiTextEdit edit = new MultiTextEdit();
		
		change.setEdit(edit);
		try{
			IBuffer buffer = compilationUnit.getBuffer();
			
			int flag = method.getFlags();
			
			String text = buffer.getText(method.getSourceRange().getOffset(), method.getSourceRange().getLength());
	
			// make method public
			int position = method.getSourceRange().getOffset();
			
			if(!Flags.isPublic(flag)){
				if(Flags.isPrivate(flag)){
					position += text.indexOf(PRIVATE);
					edit.addChild(new ReplaceEdit(position, PRIVATE.length(), PUBLIC));
				}else if(Flags.isProtected(flag)){
					position += text.indexOf(PROTECTED);
					edit.addChild(new ReplaceEdit(position, PROTECTED.length(), PUBLIC));
				}else{
					String type = Signature.getSignatureSimpleName(method.getReturnType());
					position += text.indexOf(type);
					edit.addChild(new InsertEdit(position, PUBLIC+SPACE));
				}
			}
			
			// add @LocalBean annotation
			MarkerResolutionUtils.addAnnotation(CDIConstants.LOCAL_BEAN_ANNOTATION_TYPE_NAME, compilationUnit, method.getDeclaringType(), "", edit);
		} catch (JavaModelException e) {
			CDIUIPlugin.getDefault().logError(e);
		}
		return change;
	}
	
	@Override
	public Image getImage() {
		return CDIImages.QUICKFIX_ADD;
	}

}
