/*
 * 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.lang.psi.impl.source.resolve;

import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import consulo.annotations.RequiredReadAction;
import consulo.csharp.lang.psi.CSharpLinqVariable;
import consulo.csharp.lang.psi.CSharpLocalVariable;
import consulo.csharp.lang.psi.impl.CSharpVisibilityUtil;
import consulo.dotnet.psi.DotNetGenericParameter;
import consulo.dotnet.psi.DotNetModifierListOwner;
import consulo.dotnet.psi.DotNetParameter;
import consulo.dotnet.resolve.DotNetNamespaceAsElement;
import com.intellij.openapi.util.Key;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiElementResolveResult;

/**
 * @author VISTALL
 * @since 05.03.2016
 */
public class CSharpResolveResult extends PsiElementResolveResult
{
	public static final Key<PsiElement> FORCE_PROVIDER_ELEMENT = Key.create("csharp.provider.element");

	private PsiElement myProviderElement;
	protected Boolean myAssignable = null;

	public CSharpResolveResult(@NotNull PsiElement element)
	{
		super(element);
	}

	public CSharpResolveResult(@NotNull PsiElement element, boolean validResult)
	{
		super(element, validResult);
	}

	@NotNull
	public CSharpResolveResult setProvider(@Nullable PsiElement element)
	{
		myProviderElement = element;
		return this;
	}

	@Nullable
	public PsiElement getProviderElement()
	{
		return myProviderElement;
	}

	public boolean isAssignable()
	{
		return myAssignable == null || myAssignable == Boolean.TRUE;
	}

	@RequiredReadAction
	public void setAssignable(@NotNull PsiElement place)
	{
		if(myAssignable != null)
		{
			return;
		}

		final PsiElement element = getElement();
		if(element instanceof CSharpLocalVariable ||
				element instanceof CSharpLinqVariable ||
				element instanceof DotNetParameter ||
				element instanceof DotNetGenericParameter ||
				element instanceof DotNetNamespaceAsElement)
		{
			myAssignable = Boolean.TRUE;
			return;
		}

		if(element instanceof DotNetModifierListOwner)
		{
			myAssignable = CSharpVisibilityUtil.isVisible((DotNetModifierListOwner) element, place);
		}
		else
		{
			myAssignable = Boolean.TRUE;
		}
	}
}