/*******************************************************************************
 * Copyright (c) 2009 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
 *     Zend Technologies
 *******************************************************************************/
package org.eclipse.php.internal.core.codeassist.strategies;

import org.eclipse.dltk.core.*;
import org.eclipse.dltk.internal.core.ModelElement;
import org.eclipse.php.core.codeassist.ICompletionContext;
import org.eclipse.php.core.codeassist.ICompletionReporter;
import org.eclipse.php.core.codeassist.IElementFilter;
import org.eclipse.php.core.compiler.PHPFlags;
import org.eclipse.php.internal.core.codeassist.contexts.ArrayKeyContext;
import org.eclipse.php.internal.core.typeinference.FakeField;
import org.eclipse.php.internal.core.typeinference.PHPModelUtils;

public class LocalMethodVariablesStrategyForArray extends AbstractCompletionStrategy {

	public LocalMethodVariablesStrategyForArray(ICompletionContext context, IElementFilter elementFilter) {
		super(context, elementFilter);
	}

	public LocalMethodVariablesStrategyForArray(ICompletionContext context) {
		super(context);
	}

	public void apply(ICompletionReporter reporter) throws Exception {
		ICompletionContext context = getContext();
		if (!(context instanceof ArrayKeyContext)) {
			return;
		}

		ArrayKeyContext arrayContext = (ArrayKeyContext) context;
		String prefix = arrayContext.getPrefix();
		CompletionRequestor requestor = arrayContext.getCompletionRequestor();
		IModelElement enclosingElement;
		try {
			enclosingElement = arrayContext.getSourceModule().getElementAt(arrayContext.getOffset());
			while (enclosingElement instanceof IField) {
				enclosingElement = enclosingElement.getParent();
			}
			if (!(enclosingElement instanceof IMethod)) {
				return;
			}
			ISourceRange replaceRange = getReplacementRange(arrayContext);
			IMethod enclosingMethod = (IMethod) enclosingElement;

			// complete class variable: $this
			if (!PHPFlags.isStatic(enclosingMethod.getFlags())) {
				IType declaringType = enclosingMethod.getDeclaringType();
				if (declaringType != null) {
					if ("$this".startsWith(prefix)) { //$NON-NLS-1$
						reporter.reportField(new FakeField((ModelElement) declaringType, "$this", 0, 0), "", //$NON-NLS-1$//$NON-NLS-2$
								replaceRange, false); // NON-NLS-1
					}
				}
			}

			for (IModelElement element : PHPModelUtils.getMethodFields(enclosingMethod, prefix,
					requestor.isContextInformationMode(), null)) {
				reporter.reportField((IField) element, "", replaceRange, false); //$NON-NLS-1$
			}

		} catch (ModelException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}