/*******************************************************************************
 * Copyright (c) 2005 BEA Systems, Inc. 
 * 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:
 *    jgarms@bea.com - initial API and implementation
 *    
 *******************************************************************************/

package org.eclipse.jdt.apt.tests;

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

import junit.framework.Test;
import junit.framework.TestSuite;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.ILogListener;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jdt.apt.core.AptPlugin;
import org.eclipse.jdt.apt.core.util.AptUtil;
import org.eclipse.jdt.apt.tests.annotations.helloworld.HelloWorldAnnotation;
import org.eclipse.jdt.apt.tests.annotations.helloworld.HelloWorldAnnotationProcessorFactory;
import org.eclipse.jdt.apt.tests.annotations.helloworld.HelloWorldWildcardAnnotationProcessorFactory;
import org.eclipse.jdt.apt.tests.annotations.messager.MessagerAnnotationProcessor;
import org.eclipse.jdt.apt.tests.annotations.messager.MessagerCodeExample;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.tests.builder.Problem;

import com.sun.mirror.apt.AnnotationProcessorFactory;

public class APITests extends APTTestBase {
	
	private class LogListener implements ILogListener {
		private final List<IStatus> _messages = new ArrayList<IStatus>();
		
		public void logging(IStatus status, String plugin) {
			_messages.add(status);
		}
		
		public void clear() {
			_messages.clear();
		}
		
		public List<IStatus> getList() {
			return _messages;
		}
	}
	
	private LogListener _logListener;
	
	public APITests(final String name) {
		super( name );
	}

	public static Test suite() {
		return new TestSuite( APITests.class );
	}

	@Override
	public void setUp() throws Exception {
		super.setUp();
		
		_logListener = new LogListener();
		AptPlugin.getPlugin().getLog().addLogListener(_logListener);
	}
	
	@Override
	protected void tearDown() throws Exception {
		super.tearDown();
		AptPlugin.getPlugin().getLog().removeLogListener(_logListener);
		_logListener = null;
	}
	
	public void testAptUtil() throws Exception {
		IJavaProject jproj = env.getJavaProject( getProjectName() );
		
		// Check getting a known annotation
		AnnotationProcessorFactory factory = 
			AptUtil.getFactoryForAnnotation(HelloWorldAnnotation.class.getName(), jproj);
		assertEquals(factory.getClass(), HelloWorldAnnotationProcessorFactory.class);
		
		// Check getting an annotation with a wildcard
		factory = 
			AptUtil.getFactoryForAnnotation(HelloWorldAnnotation.class.getName() + "qwerty", jproj); //$NON-NLS-1$
		assertEquals(factory.getClass(), HelloWorldWildcardAnnotationProcessorFactory.class);
	}
	
	public void testMessagerAPI() throws Exception {
		IProject project = env.getProject( getProjectName() );
		IPath srcRoot = getSourcePath();
		IPath code = env.addClass(srcRoot, MessagerCodeExample.CODE_PACKAGE, MessagerCodeExample.CODE_CLASS_NAME, MessagerCodeExample.CODE1);
		Problem prob1 = new Problem("", MessagerAnnotationProcessor.PROBLEM_TEXT_WARNING, code, //$NON-NLS-1$ 
				MessagerCodeExample.WARNING_START,
				MessagerCodeExample.WARNING_END); 
		Problem prob2 = new Problem("", MessagerAnnotationProcessor.PROBLEM_TEXT_ERROR, code, //$NON-NLS-1$
				MessagerCodeExample.ERROR_START,
				MessagerCodeExample.ERROR_END); 
		Problem[] problems = new Problem[] { prob1, prob2 };
		
		// Code example with info, warning, and error messages
		_logListener.clear();
		fullBuild( project.getFullPath() );
		expectingOnlySpecificProblemsFor(code, problems, true);
		checkMessagerAnnotationLogEntry(
				MessagerAnnotationProcessor.PROBLEM_TEXT_INFO, 
				MessagerCodeExample.INFO_START,
				MessagerCodeExample.INFO_END);

		// Code example with info and warning messages
		env.removeClass(code, MessagerCodeExample.CODE_CLASS_NAME);
		code = env.addClass(srcRoot, MessagerCodeExample.CODE_PACKAGE, MessagerCodeExample.CODE_CLASS_NAME, MessagerCodeExample.CODE2);
		_logListener.clear();
		fullBuild( project.getFullPath() );
		problems = new Problem[] { prob1 };
		expectingOnlySpecificProblemsFor(code, problems, true);
		checkMessagerAnnotationLogEntry(
				MessagerAnnotationProcessor.PROBLEM_TEXT_INFO, 
				MessagerCodeExample.INFO_START,
				MessagerCodeExample.INFO_END);
		
		// Code example with only a warning message
		env.removeClass(code, MessagerCodeExample.CODE_CLASS_NAME);
		code = env.addClass(srcRoot, MessagerCodeExample.CODE_PACKAGE, MessagerCodeExample.CODE_CLASS_NAME, MessagerCodeExample.CODE3);
		_logListener.clear();
		fullBuild( project.getFullPath() );
		expectingNoProblems();
		checkMessagerAnnotationLogEntry(
				MessagerAnnotationProcessor.PROBLEM_TEXT_INFO, 
				MessagerCodeExample.INFO_START,
				MessagerCodeExample.INFO_END);
		
		// Code example with no problems
		env.removeClass(code, MessagerCodeExample.CODE_CLASS_NAME);
		code = env.addClass(srcRoot, MessagerCodeExample.CODE_PACKAGE, MessagerCodeExample.CODE_CLASS_NAME, MessagerCodeExample.CODE4);
		_logListener.clear();
		fullBuild( project.getFullPath() );
		expectingNoProblems();
		assertTrue(_logListener.getList().isEmpty());
	}
	
	/**
	 * Check that there are exactly [targetCount] messages in the log that contain
	 * [targetMsg] and also contain "starting offset=[start]; ending offset=[end]".
	 */
	private void checkMessagerAnnotationLogEntry(String targetMsg, int start, int end) {
		int count = 0;
		final String offsetMsg = "starting offset=" + start + "; ending offset=" + end;
		for (IStatus status : _logListener.getList()) {
			String logMessage = status.getMessage();
			if (logMessage.contains(targetMsg) && logMessage.contains(offsetMsg)) {
				++count;
			}
		}
		assertEquals(1, count);
	}
	
	/** 
	 * Verifies that the given element has specifics problems and
	 * only the given problems.
	 * @see Tests#expectingOnlySpecificProblemsFor(IPath, Problem[]), and
	 * @see Tests#expectingSpecificProblemsFor(IPath, Problem[], boolean).
	 * Unfortunately this variant isn't implemented there.
	 */
	protected void expectingOnlySpecificProblemsFor(IPath root, Problem[] expectedProblems, boolean storeRange) {
		if (DEBUG)
			printProblemsFor(root);

		Problem[] rootProblems = env.getProblemsFor(root, storeRange);
	
		for (int i = 0; i < expectedProblems.length; i++) {
			Problem expectedProblem = expectedProblems[i];
			boolean found = false;
			for (int j = 0; j < rootProblems.length; j++) {
				if(expectedProblem.equals(rootProblems[j])) {
					found = true;
					rootProblems[j] = null;
					break;
				}
			}
			if (!found) {
				printProblemsFor(root);
			}
			assertTrue("problem not found: " + expectedProblem.toString(), found); //$NON-NLS-1$
		}
		for (int i = 0; i < rootProblems.length; i++) {
			if(rootProblems[i] != null) {
				printProblemsFor(root);
				assertTrue("unexpected problem: " + rootProblems[i].toString(), false); //$NON-NLS-1$
			}
		}
	}

	
}