/*
 * 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.quickfixes;

import com.intellij.codeInspection.ProblemDescriptor;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.util.PsiTreeUtil;
import org.intellij.erlang.psi.*;
import org.intellij.erlang.psi.impl.ErlangElementFactory;
import org.intellij.erlang.psi.impl.ErlangPsiImplUtil;
import org.jetbrains.annotations.NotNull;

import java.util.List;

public class ErlangExportTypeFix extends ErlangQuickFixBase {
  @NotNull
  @Override
  public String getFamilyName() {
    return "Export type";
  }

  @Override
  public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) {
    ErlangTypeDefinition type = PsiTreeUtil.getParentOfType(descriptor.getPsiElement(), ErlangTypeDefinition.class);

    if (type != null) {
      processType(project, type);
    }
  }

  public static void processType(Project project, ErlangTypeDefinition type) {
    PsiFile containingFile = type.getContainingFile();
    if (containingFile instanceof ErlangFile) {
      String exportText = ErlangPsiImplUtil.createTypePresentation(type);

      List<ErlangAttribute> attributes = ((ErlangFile) containingFile).getAttributes();
      for (ErlangAttribute attribute : attributes) {
        ErlangExportTypeAttribute export = attribute.getExportTypeAttribute();
        if (export != null) {
          ErlangExportTypes exportTypes = export.getExportTypes();

          if (exportTypes != null) {
            String replace = exportTypes.getText().replace("[", "").replace("]", "");
            String s = replace + (!StringUtil.isEmptyOrSpaces(replace) ? ", " : "") + exportText;
            PsiElement newExportFunctions = ErlangElementFactory.createExportTypeFromText(project, s);

            attribute.replace(newExportFunctions);
          }
          return;
        }
      }
      ErlangCompositeElement elementBefore = getAnchorElement((ErlangFile) containingFile);

      if (elementBefore != null) {
        containingFile.addBefore(ErlangElementFactory.createExportTypeFromText(project, exportText), elementBefore);
        containingFile.addBefore(ErlangElementFactory.createLeafFromText(project, "\n\n"), elementBefore);
      }
    }
  }
}