/*
 * 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.stub;

import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import consulo.csharp.lang.psi.CSharpConstructorDeclaration;
import consulo.csharp.lang.psi.CSharpMethodDeclaration;
import consulo.csharp.lang.psi.CSharpStubElements;
import consulo.csharp.lang.psi.CSharpTokenSets;
import consulo.dotnet.psi.DotNetLikeMethodDeclaration;
import com.intellij.psi.stubs.IStubElementType;
import com.intellij.psi.stubs.StubElement;
import com.intellij.psi.tree.IElementType;
import com.intellij.util.ArrayUtil;
import com.intellij.util.io.StringRef;

/**
 * @author VISTALL
 * @since 18.12.13.
 */
public class CSharpMethodDeclStub extends MemberStub<CSharpMethodDeclaration>
{
	public static final int DELEGATE_MASK = 1 << 0;
	public static final int EXTENSION_MASK = 1 << 1;
	public static final int DE_CONSTRUCTOR_MASK = 1 << 2;

	private final int myOperatorIndex;

	public CSharpMethodDeclStub(StubElement parent,
			@Nullable StringRef qname,
			int otherModifierMask,
			int operatorIndex)
	{
		super(parent, CSharpStubElements.METHOD_DECLARATION,  qname, otherModifierMask);
		myOperatorIndex = operatorIndex;
	}

	public CSharpMethodDeclStub(StubElement parent,
			IStubElementType elementType,
			StringRef qname,
			int otherModifierMask,
			int operatorIndex)
	{
		super(parent, elementType, qname, otherModifierMask);
		myOperatorIndex = operatorIndex;
	}

	public int getOperatorIndex()
	{
		return myOperatorIndex;
	}

	@Nullable
	public IElementType getOperator()
	{
		return myOperatorIndex == -1 ? null : CSharpTokenSets.OVERLOADING_OPERATORS_AS_ARRAY[myOperatorIndex];
	}

	public static int getOperatorIndex(@NotNull CSharpMethodDeclaration methodDeclaration)
	{
		IElementType operatorElementType = methodDeclaration.getOperatorElementType();
		return operatorElementType == null ? -1 : ArrayUtil.indexOf(CSharpTokenSets.OVERLOADING_OPERATORS_AS_ARRAY, operatorElementType);
	}

	public static int getOtherModifierMask(@NotNull DotNetLikeMethodDeclaration methodDeclaration)
	{
		int i = 0;
		if(methodDeclaration instanceof CSharpMethodDeclaration && ((CSharpMethodDeclaration) methodDeclaration).isDelegate())
		{
			i |= DELEGATE_MASK;
		}
		if(methodDeclaration instanceof CSharpMethodDeclaration && ((CSharpMethodDeclaration) methodDeclaration).isExtension())
		{
			i |= EXTENSION_MASK;
		}
		if(methodDeclaration instanceof CSharpConstructorDeclaration && ((CSharpConstructorDeclaration) methodDeclaration).isDeConstructor())
		{
			i |= DE_CONSTRUCTOR_MASK;
		}
		return i;
	}

	public boolean isNested()
	{
		return getParentStub() instanceof CSharpTypeDeclStub;
	}
}