/**
    * This file Copyright (c) 2018 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.ui.framework.chooser.definition;
  
  import info.magnolia.config.MutableWrapper;
  import info.magnolia.config.Mutator;
  import info.magnolia.ui.api.app.AppDescriptor;
  import info.magnolia.ui.api.app.registry.AppDescriptorRegistry;
  import info.magnolia.ui.contentapp.configuration.BrowserDescriptor;
  import info.magnolia.ui.contentapp.configuration.ContentViewDefinition;
  import info.magnolia.ui.contentapp.configuration.WorkbenchDefinition;
  import info.magnolia.ui.datasource.WithDatasource;
  import info.magnolia.ui.framework.datasource.definition.DatasourceDefinition;
  
  import java.util.Optional;
  
  import javax.inject.Inject;
  
  import lombok.AccessLevel;
  import lombok.Getter;
  import lombok.Setter;
  
  /**
   * Workbench chooser definition auto-resolving properties based on an app name.
   *
   * @param <T> type of items to be chosen
   */
  @Getter
  @Setter
  public class AppAwareWorkbenchChooserDefinition<T> extends WorkbenchChooserDefinition<T> {
  
      private String title;
      private String appName;
      private WorkbenchDefinition<T> workbenchDefinition;
  
      @Getter(AccessLevel.PRIVATE)
      @Setter(AccessLevel.PRIVATE)
      private AppDescriptorRegistry appDescriptorRegistry;
  
      @Inject
      public AppAwareWorkbenchChooserDefinition(AppDescriptorRegistry appDescriptorRegistry) {
          super();
          this.appDescriptorRegistry = appDescriptorRegistry;
      }
  
      /**
       * @return the datasource definition for this Chooser. The datasource may come either from {@link #getDatasource()}
       * or be resolved from {@link #getAppName()}.
       *
       * @see #resolveDatasourceFromAppName()
       */
      @Override
      public DatasourceDefinition getDatasource() {
          return Optional.ofNullable(super.getDatasource()).orElseGet(() -> resolveDatasourceFromAppName().orElse(null));
      }
  
      private Optional<DatasourceDefinition> resolveDatasourceFromAppName() {
          return Optional.of((DatasourceDefinition) resolveBrowserDescriptorFromAppName()
                  .map(BrowserDescriptor::getDatasource)
                  .orElseGet(() -> {
                      AppDescriptor appDescriptor = getAppDescriptorRegistry().getProvider(appName).get();
                      return Optional.of(appDescriptor)
                              .filter(WithDatasource.class::isInstance)
                              .map(WithDatasource.class::cast)
                              .map(WithDatasource::getDatasource)
                              .get();
                  }));
      }
 
     @Override
     public WorkbenchDefinition<T> getWorkbench() {
         WorkbenchDefinition<T> workbenchFromAppOrDefault = resolveWorkbenchDefinitionFromAppName().orElse(super.getWorkbench());
         final WorkbenchDefinition<T> workbenchDefinition = Optional.ofNullable(this.workbenchDefinition).orElse(workbenchFromAppOrDefault);
         final WorkbenchDefinition<T> wrapped = MutableWrapper.wrap(workbenchDefinition);
         wrapped.getContentViews().forEach(this::applySingleSelectAndReadOnly);
         return wrapped;
     }
 
     private void applySingleSelectAndReadOnly(ContentViewDefinition<T> viewDefinition) {
         final TabularViewMutator tabularViewMutator = new TabularViewMutator<>(MutableWrapper.asMutable(viewDefinition));
         if (!this.isMultiSelect()) {
             tabularViewMutator.setSingleSelectMode();
         }
         tabularViewMutator.setReadOnly();
     }
 
     private Optional<WorkbenchDefinition<T>> resolveWorkbenchDefinitionFromAppName() {
         return resolveBrowserDescriptorFromAppName().map(BrowserDescriptor::getWorkbench);
     }
 
     private Optional<BrowserDescriptor> resolveBrowserDescriptorFromAppName() {
         return Optional.ofNullable(getAppName())
                 .map(appDescriptorRegistry::getProvider)
                 .map(provider -> provider.get().getSubApps().values()
                         .stream()
                         .filter(BrowserDescriptor.class::isInstance)
                         .map(BrowserDescriptor.class::cast)
                         .findFirst()
                         .orElseThrow(() -> new IllegalStateException("Could not resolve browser descriptor from app " + getAppName())));
     }
 
     private static class TabularViewMutator<T> extends Mutator<ContentViewDefinition<T>> {
 
         TabularViewMutator(MutableWrapper.Mutable<ContentViewDefinition<T>> mutableObject) {
             super(mutableObject);
         }
 
         void setSingleSelectMode() {
             setProperty("multiSelect", false);
         }
 
         void setReadOnly() {
             setProperty("readOnly", true);
         }
     }
 }