/*******************************************************************************
 * Copyright (c) 2000, 2006 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.junit.model;

import java.util.ArrayList;
import java.util.List;


public class TestSuiteElement extends TestElement {
	
	private List/*<TestElement>*/ fChildren;
	private Status fChildrenStatus;
	
	public TestSuiteElement(TestSuiteElement parent, String id, String testName, int childrenCount) {
		super(parent, id, testName);
		fChildren= new ArrayList(childrenCount);
	}

	public void addChild(TestElement child) {
		fChildren.add(child);
	}
	
	public TestElement[] getChildren() {
		return (TestElement[]) fChildren.toArray(new TestElement[fChildren.size()]);
	}
	
	public Status getStatus() {
		Status suiteStatus= getSuiteStatus();
		if (fChildrenStatus != null) {
			// must combine children and suite status here, since failures can occur e.g. in @AfterClass
			return Status.combineStatus(fChildrenStatus, suiteStatus);
		} else {
			return suiteStatus;
		}
	}
	
	private Status getCumulatedStatus() {
		TestElement[] children= (TestElement[]) fChildren.toArray(new TestElement[fChildren.size()]); // copy list to avoid concurreny problems
		if (children.length == 0)
			return getSuiteStatus();
		
		Status cumulated= children[0].getStatus();
		
		for (int i= 1; i < children.length; i++) {
			Status childStatus= children[i].getStatus();
			cumulated= Status.combineStatus(cumulated, childStatus);
		}
		// not necessary, see special code in Status.combineProgress()
//		if (suiteStatus.isErrorOrFailure() && cumulated.isNotRun())
//			return suiteStatus; //progress is Done if error in Suite and no children run
		return cumulated;
	}

	public Status getSuiteStatus() {
		return super.getStatus();
	}
	
	public String toString() {
		return super.toString() + " (" + fChildren.size() + ")"; //$NON-NLS-1$ //$NON-NLS-2$
	}

	public void childChangedStatus(TestElement child, Status childStatus) {
		int childCount= fChildren.size();
		if (child == fChildren.get(0) && childStatus.isRunning()) {
			// is first child, and is running -> copy status
			internalSetChildrenStatus(childStatus);
			return;
		}
		TestElement lastChild= (TestElement) fChildren.get(childCount - 1);
		if (child == lastChild) {
			if (childStatus.isDone()) {
				// all children done, collect cumulative status
				internalSetChildrenStatus(getCumulatedStatus());
				return;
			}
			// go on (child could e.g. be a TestSuiteElement with RUNNING_FAILURE)
			
		} else 	if (! lastChild.getStatus().isNotRun()) {
			// child is not last, but last child has been run -> child has been rerun or is rerunning
			internalSetChildrenStatus(getCumulatedStatus());
			return;
		}
		
		// finally, set RUNNING_FAILURE/ERROR if child has failed but suite has not failed: 
		if (childStatus.isFailure()) {
			if (fChildrenStatus == null || ! fChildrenStatus.isErrorOrFailure()) {
				internalSetChildrenStatus(Status.RUNNING_FAILURE);
				return;
			}
		} else if (childStatus.isError()) {
			if (fChildrenStatus == null || ! fChildrenStatus.isError()) {
				internalSetChildrenStatus(Status.RUNNING_ERROR);
				return;
			}
		}
	}

	private void internalSetChildrenStatus(Status status) {
		if (fChildrenStatus == status)
			return;
		fChildrenStatus= status;
		TestSuiteElement parent= getParent();
		if (parent != null)
			parent.childChangedStatus(this, getStatus());
	}

}