/*******************************************************************************
 * Copyright (c) 2005, 2014 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.debug.tests.refactoring;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IFolder;
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.IStatus;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.core.runtime.Status;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.search.IJavaSearchConstants;
import org.eclipse.jdt.core.search.IJavaSearchScope;
import org.eclipse.jdt.core.search.SearchEngine;
import org.eclipse.jdt.core.search.SearchPattern;
import org.eclipse.jdt.core.search.TypeNameRequestor;
import org.eclipse.jdt.debug.tests.AbstractDebugTest;
import org.eclipse.jdt.debug.tests.TestAgainException;
import org.eclipse.ltk.core.refactoring.CheckConditionsOperation;
import org.eclipse.ltk.core.refactoring.PerformRefactoringOperation;
import org.eclipse.ltk.core.refactoring.Refactoring;
import org.eclipse.ltk.core.refactoring.RefactoringStatus;

/**
 * Common refactoring utils.
 *
 * @since 3.2
 */
public class AbstractRefactoringDebugTest extends AbstractDebugTest {

	public AbstractRefactoringDebugTest(String name) {
		super(name);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jdt.debug.tests.AbstractDebugTest#setUp()
	 */
	@Override
	protected void setUp() throws Exception {
		super.setUp();
		cleanTestFiles();
	}

	/**
	 * Performs the given refactoring. If a {@link CoreException} occurs during the refactoring, we trap it and throw a {@link TestAgainException} to
	 * try the test again.
	 *
	 * @param refactoring
	 * @throws Exception
	 */
	public void performRefactor(final Refactoring refactoring) throws Exception {
		if(refactoring == null) {
			return;
		}
		PerformRefactoringOperation op = new PerformRefactoringOperation(refactoring, CheckConditionsOperation.ALL_CONDITIONS);
		try {
			ResourcesPlugin.getWorkspace().run(op, new NullProgressMonitor());
			waitForBuild();
			RefactoringStatus validationStatus = op.getValidationStatus();
			assertTrue(validationStatus.toString(), validationStatus.isOK());
			RefactoringStatus conditionStatus = op.getConditionStatus();
			assertTrue(conditionStatus.toString(), conditionStatus.isOK());
		}
		catch(CoreException ce) {
			//try the test again - the tests reset the workspace to remove any half-moved / change files
			//see https://bugs.eclipse.org/bugs/show_bug.cgi?id=412486
			throw new TestAgainException(ce.getLocalizedMessage());
		}
	}

	/**
	 * Clean up all the test files
	 * @throws CoreException
	 */
	protected void cleanTestFiles() throws CoreException {
		waitUntilIndexesReady();
		try {
			doClean();
			waitForBuild();
		} catch (Exception e) {
			throw new CoreException(new Status(IStatus.ERROR, "org.eclipse.jdt.debug.tests", 0, "Error", e));
		}
	}

	/**
	 * Cleans up refactored files and reverts the source.
	 * @throws Exception
	 */
	private void doClean() throws Exception {
		IJavaProject javaProject = get14Project();
		IProject project = javaProject.getProject();
		IFolder folder = project.getFolder("src");
		folder.refreshLocal(IResource.DEPTH_INFINITE, null);

		IPackageFragmentRoot root = getPackageFragmentRoot(javaProject, "src");
		IPackageFragment fragment = root.getPackageFragment("renamedPackage");
		if (fragment.exists()) {
			fragment.delete(true, new NullProgressMonitor());
		}
		fragment = root.getPackageFragment("a.b.c");
		if (!fragment.exists()) {
			root.createPackageFragment("a.b.c", true, new NullProgressMonitor());
		}

	// cleanup MoveeSource / Movee.java
		IFile target = project.getFile("src/a/b/Movee.java");
		if (target.exists()) {
			target.delete(true, false, null);
		}
		target = project.getFile("src/a/b/c/Movee.java");
		if (target.exists()) {
			target.delete(true, false, null);
		}
		IFile source = project.getFile("src/a/MoveeSource");// no .java - it's a bin
		source.copy(target.getFullPath(), true, null);

	// cleanup MoveeRecipientSource / MoveeRecipient.java
		target = project.getFile("src/a/b/MoveeRecipient.java");
		if (target.exists()) {
			target.delete(true, false, null);
		}
		source = project.getFile("src/a/MoveeRecipientSource");// no .java - it's a bin
		source.copy(target.getFullPath(), true, null);
		target = project.getFile("src/a/b/c/RenamedType.java");
		if (target.exists()) {
			target.delete(true, false, null);
		}
		target = project.getFile("src/a/b/c/RenamedCompilationUnit.java");// move up a dir
		if (target.exists()) {
			target.delete(true, false, null);
		}

	// cleanup MoveeChildSource / MoveeChild.java
		target = project.getFile("src/a/b/MoveeChild.java");
		if (target.exists()) {
			target.delete(true, false, null);
		}
		target = project.getFile("src/a/b/c/MoveeChild.java");
		if (target.exists()) {
			target.delete(true, false, null);
		}
		source = project.getFile("src/a/MoveeChildSource");// no .java - it's a bin
		source.copy(target.getFullPath(), true, null);
	}

	/**
	 * Wait until the search index is ready
	 */
	protected static void waitUntilIndexesReady() {
		// dummy query for waiting until the indexes are ready
		SearchEngine engine = new SearchEngine();
		IJavaSearchScope scope = SearchEngine.createWorkspaceScope();
		try {
			engine.searchAllTypeNames(null,
					SearchPattern.R_PATTERN_MATCH | SearchPattern.R_CASE_SENSITIVE,
					"!@$#!@".toCharArray(),
					SearchPattern.R_PATTERN_MATCH | SearchPattern.R_CASE_SENSITIVE,
					IJavaSearchConstants.CLASS,
					scope,
					new TypeNameRequestor() {},
					IJavaSearchConstants.WAIT_UNTIL_READY_TO_SEARCH,
					null);
		} catch (CoreException e) {
		}
	}

}