/*
 * Copyright 2012-2014 Sergey Ignatov
 *
 * 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.intellij.erlang.copyright;

import com.intellij.openapi.fileTypes.FileType;
import com.intellij.openapi.module.Module;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.PsiComment;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiWhiteSpace;
import com.maddyhome.idea.copyright.CopyrightProfile;
import com.maddyhome.idea.copyright.options.LanguageOptions;
import com.maddyhome.idea.copyright.psi.UpdateCopyright;
import com.maddyhome.idea.copyright.psi.UpdateCopyrightsProvider;
import com.maddyhome.idea.copyright.psi.UpdatePsiFileCopyright;
import org.intellij.erlang.psi.ErlangFile;

public class UpdateErlangCopyrightsProvider extends UpdateCopyrightsProvider {
  @Override
  public UpdateCopyright createInstance(Project project, Module module, VirtualFile file, FileType base,
                                        CopyrightProfile options) {
    return new UpdateErlangFileCopyright(project, module, file, options);
  }

  @Override
  public LanguageOptions getDefaultOptions() {
    LanguageOptions options = super.getDefaultOptions();
    options.setFiller("=");
    options.setBlock(false);
    options.setPrefixLines(true);
    return options;
  }

  private static class UpdateErlangFileCopyright extends UpdatePsiFileCopyright {
    private UpdateErlangFileCopyright(Project project, Module module, VirtualFile root, CopyrightProfile options) {
      super(project, module, root, options);
    }

    @Override
    protected boolean accept() {
      return getFile() instanceof ErlangFile;
    }

    protected void scanFile() {
      PsiElement first = getFile().getFirstChild();
      PsiElement last = first;
      PsiElement next = first;
      while (next != null) {
        if (next instanceof PsiComment || next instanceof PsiWhiteSpace) {
          next = getNextSibling(next);
        }
        else {
          break;
        }
        last = next;
      }

      if (first != null) {
        checkComments(first, last, true);
      }
      else {
        checkComments(null, null, true);
      }
    }
  }
}