/*
 * 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.jetbrains.python.refactoring.introduce.variable;

import com.intellij.psi.PsiElement;
import com.intellij.psi.util.PsiTreeUtil;
import com.jetbrains.python.PyPsiBundle;
import com.jetbrains.python.psi.PyStatement;
import com.jetbrains.python.refactoring.introduce.IntroduceHandler;
import com.jetbrains.python.refactoring.introduce.IntroduceOperation;
import org.jetbrains.annotations.NotNull;

import java.util.List;

public class PyIntroduceVariableHandler extends IntroduceHandler {
  public PyIntroduceVariableHandler() {
    super(new VariableValidator(), PyPsiBundle.message("refactoring.introduce.variable.dialog.title"));
  }

  @Override
  protected PsiElement addDeclaration(final @NotNull PsiElement expression,
                                      final @NotNull PsiElement declaration,
                                      @NotNull IntroduceOperation operation) {
    return doIntroduceVariable(expression, declaration, operation.getOccurrences(), operation.isReplaceAll());
  }

  public static PsiElement doIntroduceVariable(PsiElement expression,
                                               PsiElement declaration,
                                               List<? extends PsiElement> occurrences,
                                               boolean replaceAll) {
    PsiElement anchor = replaceAll ? IntroduceHandler.findAnchor(occurrences) : PsiTreeUtil.getParentOfType(expression, PyStatement.class);
    assert anchor != null;
    final PsiElement parent = anchor.getParent();
    return parent.addBefore(declaration, anchor);
  }

  @Override
  protected String getHelpId() {
    return "refactoring.introduceVariable";
  }

  @Override
  protected String getRefactoringId() {
    return "refactoring.python.introduce.variable";
  }
}
