/*******************************************************************************
 * Copyright (c) 2017 Rogue Wave Software Inc. 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:
 *  Rogue Wave Software Inc. - initial implementation
 *******************************************************************************/
package org.eclipse.php.phpunit.ui.view.actions;

import org.eclipse.core.resources.IProject;
import org.eclipse.dltk.core.*;
import org.eclipse.php.phpunit.ui.view.PHPUnitView;
import org.eclipse.ui.texteditor.ITextEditor;

/**
 * Open a class on a PHPUnitTest method.
 */
public class OpenTestAction extends OpenEditorAction {

	private int endPosition = 0;
	private String functionName;
	private int startPosition = 0;

	public OpenTestAction(final String label, final PHPUnitView testRunner, final String className,
			final String fileName, final int lineNumber) {
		this(label, testRunner, className, fileName, lineNumber, null);
	}

	public OpenTestAction(final String label, final PHPUnitView testRunner, final String className,
			final String fileName, final int lineNumber, final String method) {
		super(label, testRunner, className, fileName, lineNumber);
		functionName = method;
	}

	@Override
	protected IModelElement findElement(final IProject project, final String elementName, final String fileName)
			throws ModelException {
		if (elementName == null) {
			final IMethod function = findFunction(project, functionName, fileName);
			if (function == null) {
				return null;
			}
			startPosition = function.getNameRange().getOffset();
			endPosition = startPosition + function.getNameRange().getOffset();
			return function;

		}
		final IType phpClass = findClass(project, elementName, fileName);
		if (phpClass == null) {
			return null;
		}

		ISourceRange nameRange = phpClass.getNameRange();
		startPosition = nameRange.getOffset();
		endPosition = startPosition + nameRange.getLength();

		if (functionName == null) {
			return phpClass;
		}

		final IMethod function = findMethod(phpClass);
		if (function == null) {
			return phpClass;
		}

		startPosition = function.getNameRange().getOffset();
		endPosition = startPosition + function.getNameRange().getLength();

		return function;
	}

	IMethod findMethod(final IType phpClass) throws ModelException {
		final IMethod[] functions = phpClass.getMethods();
		for (IMethod function : functions) {
			if (function.getElementName().equalsIgnoreCase(functionName)) {
				return function;
			}
		}
		return null;
	}

	@Override
	public boolean isEnabled() {
		if (functionName != null) {
			return findFunction(getLaunchedProject(), functionName, fFileName) != null;
		}
		if (fClassName != null) {
			return findClass(getLaunchedProject(), fClassName, fFileName) != null;
		}
		return false;
	}

	@Override
	protected void reveal(final ITextEditor textEditor) {
		if (endPosition > 0) {
			textEditor.selectAndReveal(startPosition, endPosition - startPosition);
		}
	}
}