/*
 * Copyright 2011 The authors
 * 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.intellij.struts2.gotosymbol;

import com.intellij.navigation.NavigationItem;
import com.intellij.openapi.module.Module;
import com.intellij.openapi.util.Comparing;
import com.intellij.struts2.StrutsIcons;
import com.intellij.struts2.dom.struts.model.StrutsManager;
import com.intellij.struts2.dom.struts.model.StrutsModel;
import com.intellij.struts2.dom.struts.strutspackage.StrutsPackage;
import com.intellij.struts2.facet.StrutsFacet;
import com.intellij.util.Function;
import com.intellij.util.NullableFunction;
import com.intellij.util.containers.ContainerUtil;
import com.intellij.util.xml.model.gotosymbol.GoToSymbolProvider;
import org.jetbrains.annotations.NotNull;

import java.util.List;
import java.util.Set;

/**
 * Go to {@link StrutsPackage} by name (CTRL+ALT+SHIFT+N).
 *
 * @author Yann Cébron
 */
public class GoToPackageSymbolProvider extends GoToSymbolProvider {

  private static final Function<StrutsPackage, String> STRUTS_PACKAGE_NAME_FUNCTION =
    (NullableFunction<StrutsPackage, String>)strutsPackage -> strutsPackage.getName().getStringValue();

  protected boolean acceptModule(final Module module) {
    return StrutsFacet.getInstance(module) != null;
  }

  protected void addNames(@NotNull final Module module, final Set<String> result) {
    final StrutsModel strutsModel = StrutsManager.getInstance(module.getProject()).getCombinedModel(module);
    if (strutsModel == null) {
      return;
    }

    final Set<String> packageNames = ContainerUtil.map2Set(strutsModel.getStrutsPackages(),
                                                           STRUTS_PACKAGE_NAME_FUNCTION);
    result.addAll(packageNames);
  }

  protected void addItems(@NotNull final Module module, final String name, final List<NavigationItem> result) {
    final StrutsModel strutsModel = StrutsManager.getInstance(module.getProject()).getCombinedModel(module);
    if (strutsModel == null) {
      return;
    }

    final List<StrutsPackage> strutsPackageList = strutsModel.getStrutsPackages();

    for (final StrutsPackage strutsPackage : strutsPackageList) {
      if (Comparing.strEqual(name, strutsPackage.getName().getStringValue())) {
        final NavigationItem item = createNavigationItem(strutsPackage.getXmlTag(),
                                                         name,
                                                         StrutsIcons.STRUTS_PACKAGE);
        result.add(item);
      }
    }
  }

}