/*
 * Copyright 2000-2014 JetBrains s.r.o.
 *
 * 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 com.intellij.psi.impl.source.javadoc;

import com.intellij.model.psi.PsiSymbolReference;
import com.intellij.psi.JavaDocTokenType;
import com.intellij.psi.JavaElementVisitor;
import com.intellij.psi.PsiElementVisitor;
import com.intellij.psi.PsiReference;
import com.intellij.psi.impl.JavaPsiImplementationHelper;
import com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistry;
import com.intellij.psi.impl.source.tree.LeafPsiElement;
import com.intellij.psi.javadoc.PsiDocToken;
import com.intellij.psi.tree.IElementType;
import org.jetbrains.annotations.NotNull;

import java.util.Collection;
import java.util.Collections;

public class PsiDocTokenImpl extends LeafPsiElement implements PsiDocToken{
  public PsiDocTokenImpl(@NotNull IElementType type, CharSequence text) {
    super(type, text);
  }

  @Override
  public IElementType getTokenType() {
    return getElementType();
  }

  @Override
  public void accept(@NotNull PsiElementVisitor visitor) {
    if (visitor instanceof JavaElementVisitor) {
      ((JavaElementVisitor)visitor).visitDocToken(this);
    }
    else {
      visitor.visitElement(this);
    }
  }

  @Override
  public PsiReference @NotNull [] getReferences() {
    if (getTokenType() == JavaDocTokenType.DOC_COMMENT_DATA) {
      return ReferenceProvidersRegistry.getReferencesFromProviders(this);
    }
    return super.getReferences();
  }

  @Override
  public @NotNull Collection<? extends @NotNull PsiSymbolReference> getOwnReferences() {
    if (getTokenType() == JavaDocTokenType.DOC_TAG_NAME && getText().equals("@inheritDoc")) {
      return Collections.singleton(
        JavaPsiImplementationHelper
          .getInstance(getProject())
          .getInheritDocSymbol(this)
      );
    }
    return super.getOwnReferences();
  }

  @Override
  public String toString(){
    return "PsiDocToken:" + getTokenType().toString();
  }
}
