/*
 * Copyright 2013-2017 consulo.io
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package consulo.csharp.ide.highlight.check.impl;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import com.intellij.psi.util.PsiTreeUtil;
import consulo.annotation.access.RequiredReadAction;
import consulo.csharp.ide.highlight.CSharpHighlightContext;
import consulo.csharp.ide.highlight.check.CompilerCheck;
import consulo.csharp.lang.psi.CSharpFieldDeclaration;
import consulo.csharp.lang.psi.CSharpReferenceExpression;
import consulo.csharp.module.extension.CSharpLanguageVersion;

/**
 * @author VISTALL
 * @since 02-Nov-17
 */
public class CS0027 extends CompilerCheck<CSharpReferenceExpression>
{
	@RequiredReadAction
	@Nullable
	@Override
	public HighlightInfoFactory checkImpl(@Nonnull CSharpLanguageVersion languageVersion, @Nonnull CSharpHighlightContext highlightContext, @Nonnull CSharpReferenceExpression element)
	{
		if(element.kind() == CSharpReferenceExpression.ResolveToKind.THIS)
		{
			CSharpFieldDeclaration declaration = PsiTreeUtil.getParentOfType(element, CSharpFieldDeclaration.class);
			if(declaration == null)
			{
				return null;
			}
			return newBuilder(element, "this");
		}
		return null;
	}
}