/*
 * Copyright 2000-2012 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 org.jetbrains.plugins.groovy.lang.groovydoc.psi.impl;

import com.intellij.lang.ASTNode;
import com.intellij.psi.PsiElement;
import com.intellij.psi.tree.TokenSet;
import com.intellij.psi.util.PsiUtilCore;
import com.intellij.util.IncorrectOperationException;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.plugins.groovy.lang.groovydoc.psi.api.GrDocComment;
import org.jetbrains.plugins.groovy.lang.groovydoc.psi.api.GrDocParameterReference;
import org.jetbrains.plugins.groovy.lang.groovydoc.psi.api.GrDocTag;
import org.jetbrains.plugins.groovy.lang.groovydoc.psi.api.GrDocTagValueToken;
import org.jetbrains.plugins.groovy.lang.psi.GroovyElementVisitor;
import org.jetbrains.plugins.groovy.lang.psi.GroovyPsiElementFactory;

import java.util.List;

import static org.jetbrains.plugins.groovy.lang.groovydoc.lexer.GroovyDocTokenTypes.mGDOC_COMMENT_DATA;
import static org.jetbrains.plugins.groovy.lang.groovydoc.lexer.GroovyDocTokenTypes.mGDOC_TAG_NAME;
import static org.jetbrains.plugins.groovy.lang.groovydoc.lexer.GroovyDocTokenTypes.mGDOC_TAG_VALUE_TOKEN;
import static org.jetbrains.plugins.groovy.lang.parser.GroovyElementTypes.*;

/**
 * @author ilyas
 */
public class GrDocTagImpl extends GroovyDocPsiElementImpl implements GrDocTag {
  private static final TokenSet VALUE_BIT_SET = TokenSet
    .create(mGDOC_TAG_VALUE_TOKEN, GDOC_METHOD_REF, GDOC_FIELD_REF, GDOC_PARAM_REF, GDOC_REFERENCE_ELEMENT, mGDOC_COMMENT_DATA,
            GDOC_INLINED_TAG);

  public GrDocTagImpl(@NotNull ASTNode node) {
    super(node);
  }

  public void accept(GroovyElementVisitor visitor) {
    visitor.visitDocTag(this);
  }

  public String toString() {
    return "GroovyDocTag";
  }

  @NotNull
  public String getName() {
    return getNameElement().getText().substring(1);
  }

  @NotNull
  public PsiElement getNameElement() {
    PsiElement element = findChildByType(mGDOC_TAG_NAME);
    assert element != null;
    return element;
  }


  public GrDocComment getContainingComment() {
    return (GrDocComment)getParent();
  }

  @Nullable
  public GrDocTagValueToken getValueElement() {
    return findChildByClass(GrDocTagValueToken.class);
  }

  @Nullable
  public GrDocParameterReference getDocParameterReference() {
    return findChildByClass(GrDocParameterReference.class);
  }

  public PsiElement[] getDataElements() {
    final List<PsiElement> list = findChildrenByType(VALUE_BIT_SET);
    return PsiUtilCore.toPsiElementArray(list);
  }

  public PsiElement setName(@NonNls @NotNull String name) throws IncorrectOperationException {
    final PsiElement nameElement = getNameElement();
    final GroovyPsiElementFactory factory = GroovyPsiElementFactory.getInstance(getProject());
    final GrDocComment comment = factory.createDocCommentFromText("/** @" + name + "*/");
    nameElement.replace(comment.getTags()[0].getNameElement());
    return this;
  }

}