/*
 * 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 org.jetbrains.plugins.groovy.lang.completion.smartEnter.fixers;

import com.intellij.lang.SmartEnterProcessorWithFixers;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.Editor;
import com.intellij.psi.PsiElement;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.plugins.groovy.lang.completion.smartEnter.GroovySmartEnterProcessor;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrIfStatement;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrStatement;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression;

/**
 * User: Dmitry.Krasilschikov
 * Date: 31.07.2008
 */
public class GrIfConditionFixer extends SmartEnterProcessorWithFixers.Fixer<GroovySmartEnterProcessor> {
  @Override
  public void apply(@NotNull Editor editor, @NotNull GroovySmartEnterProcessor processor, @NotNull PsiElement psiElement) {
    if (psiElement instanceof GrIfStatement) {
      final Document doc = editor.getDocument();
      final GrIfStatement ifStatement = (GrIfStatement) psiElement;
      final PsiElement rParen = ifStatement.getRParenth();
      final PsiElement lParen = ifStatement.getLParenth();
      final GrExpression condition = ifStatement.getCondition();

      if (condition == null) {
        if (lParen == null || rParen == null) {
          int stopOffset = doc.getLineEndOffset(doc.getLineNumber(ifStatement.getTextRange().getStartOffset()));
          final GrStatement then = ifStatement.getThenBranch();
          if (then != null) {
            stopOffset = Math.min(stopOffset, then.getTextRange().getStartOffset());
          }
          stopOffset = Math.min(stopOffset, ifStatement.getTextRange().getEndOffset());

          doc.replaceString(ifStatement.getTextRange().getStartOffset(), stopOffset, "if ()");

          processor.registerUnresolvedError(ifStatement.getTextRange().getStartOffset() + "if (".length());
        } else {
          processor.registerUnresolvedError(lParen.getTextRange().getEndOffset());
        }
      } else if (rParen == null) {
        doc.insertString(condition.getTextRange().getEndOffset(), ")");
      }
    }
  }
}