/*
 * Copyright 2000-2015 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.osmorc.inspection;

import com.intellij.codeInspection.ProblemsHolder;
import com.intellij.openapi.util.TextRange;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.PsiDirectory;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiElementVisitor;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.lang.manifest.psi.Header;
import org.jetbrains.lang.manifest.psi.HeaderValue;
import org.jetbrains.lang.manifest.psi.HeaderValuePart;
import org.jetbrains.osgi.project.BundleManifest;
import org.jetbrains.osgi.project.BundleManifestCache;
import org.osgi.framework.Constants;
import org.osmorc.facet.OsmorcFacet;
import org.osmorc.i18n.OsmorcBundle;
import org.osmorc.manifest.lang.psi.Clause;
import org.osmorc.util.OsgiPsiUtil;

/**
 * @author Vladislav.Soroka
 */
public class WrongImportPackageInspection extends AbstractOsgiVisitor {
  @NotNull
  @Override
  protected PsiElementVisitor buildVisitor(OsmorcFacet facet, final ProblemsHolder holder, boolean isOnTheFly) {
    return new PsiElementVisitor() {
      @Override
      public void visitElement(PsiElement element) {
        if (OsgiPsiUtil.isHeader(element, Constants.IMPORT_PACKAGE)) {
          nextValue:
          for (HeaderValue value : ((Header)element).getHeaderValues()) {
            if (value instanceof Clause) {
              HeaderValuePart valuePart = ((Clause)value).getValue();
              if (valuePart != null) {
                String packageName = valuePart.getUnwrappedText();
                packageName = StringUtil.trimEnd(packageName, ".*");
                if (StringUtil.isEmptyOrSpaces(packageName)) continue;

                PsiDirectory[] directories = OsgiPsiUtil.resolvePackage(element, packageName);
                if (directories.length == 0) continue;

                for (PsiDirectory directory : directories) {
                  BundleManifest manifest = BundleManifestCache.getInstance(element.getProject()).getManifest(directory);
                  if (manifest != null && manifest.getExportedPackage(packageName) != null) {
                    continue nextValue;
                  }
                }

                String message = OsmorcBundle.message("WrongImportPackageInspection.message");
                TextRange range = valuePart.getHighlightingRange().shiftRight(-valuePart.getTextOffset());
                holder.registerProblem(valuePart, range, message);
              }
            }
          }
        }
      }
    };
  }
}