/*******************************************************************************
 * Copyright (c) 2005, 2014 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.debug.core.refactoring;

import java.util.List;

import org.eclipse.core.resources.IMarker;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.debug.core.model.IBreakpoint;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.debug.core.IJavaBreakpoint;
import org.eclipse.jdt.internal.debug.ui.BreakpointUtils;
import org.eclipse.jdt.internal.debug.ui.JDIDebugUIPlugin;
import org.eclipse.ltk.core.refactoring.Change;

/**
 * Breakpoint participant for project rename.
 *
 * @since 3.2
 */
public class BreakpointRenameProjectParticipant extends BreakpointRenameParticipant {

	/* (non-Javadoc)
	 * @see org.eclipse.jdt.internal.debug.core.refactoring.BreakpointRenameParticipant#accepts(org.eclipse.jdt.core.IJavaElement)
	 */
	@Override
	protected boolean accepts(IJavaElement element) {
		return element instanceof IJavaProject;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jdt.internal.debug.core.refactoring.BreakpointRenameParticipant#gatherChanges(org.eclipse.core.resources.IMarker[], java.util.List, java.lang.String)
	 */
	@Override
	protected void gatherChanges(IMarker[] markers, List<Change> changes, String destProjectName) throws CoreException, OperationCanceledException {
		IProject project = ResourcesPlugin.getWorkspace().getRoot().getProject(destProjectName);
		IJavaProject destProject = JavaCore.create(project);
		for (int i = 0; i < markers.length; i++) {
			IMarker marker = markers[i];
			IBreakpoint breakpoint = getBreakpoint(marker);
			if (breakpoint instanceof IJavaBreakpoint) {
				IJavaBreakpoint javaBreakpoint = (IJavaBreakpoint) breakpoint;
				IType breakpointType = BreakpointUtils.getType(javaBreakpoint);
				if (breakpointType != null) {
					IPackageFragmentRoot root = (IPackageFragmentRoot) breakpointType.getPackageFragment().getParent();
					IResource rootResource = null;
					if (root.getCorrespondingResource().equals(getOriginalElement().getCorrespondingResource())) {
						rootResource = project;
					} else {
						if (root.isArchive()) {
							rootResource = project.getFile(root.getElementName());
						} else {
							rootResource = project.getFolder(getRootName(root));
						}
					}
					IPackageFragmentRoot destRoot = destProject.getPackageFragmentRoot(rootResource);
					IPackageFragment destPackage = destRoot.getPackageFragment(breakpointType.getPackageFragment().getElementName());
					IJavaElement parentElement = null;
					if (breakpointType.isBinary()) {
						parentElement = destPackage.getClassFile(breakpointType.getClassFile().getElementName());
					} else {
						parentElement = destPackage.getCompilationUnit(breakpointType.getCompilationUnit().getElementName());
					}
					IJavaElement element = BreakpointChange.findElement(parentElement, breakpointType);
					if (element != null) {
						if (element instanceof IType) {
							IType destType = (IType) element;
							changes.add(createTypeChange(javaBreakpoint, destType, breakpointType));
						}
					}
				}
			}
		}
	}

	/*
	 * (non-Javadoc) returns the root folder path. root.getElementName() does not work if src folder has layers of folders
	 */
	private String getRootName(IPackageFragmentRoot root) {
		try {
			IResource resource = root.getCorrespondingResource();
			return resource.getFullPath().removeFirstSegments(1).toString();
		}
		catch (JavaModelException e) {
			JDIDebugUIPlugin.log(e);
		}
		return root.getElementName();
	}
}