/**
    * This file Copyright (c) 2019 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.contentapp.action;
  
  import info.magnolia.commands.CommandsManager;
  import info.magnolia.context.Context;
  import info.magnolia.ui.ValueContext;
  import info.magnolia.ui.api.action.AbstractAction;
  import info.magnolia.ui.api.action.CommandActionDefinition;
  import info.magnolia.ui.contentapp.async.AsyncActionExecutor;
  
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.stream.Collectors;
  
  import javax.inject.Inject;
  
  import com.machinezoo.noexception.Exceptions;
  
  /**
   * Base action supporting execution of commands.
   *
   * @param <T> type of the item.
   * @param <D> {@link info.magnolia.ui.api.action.CommandActionDefinition}.
   */
  public class CommandAction<T, D extends CommandActionDefinition> extends AbstractAction<D> {
  
      private final CommandsManager commandsManager;
      private final ValueContext<T> valueContext;
      private final Context context;
      private final AsyncActionExecutor asyncActionExecutor;
  
      @Inject
      public CommandAction(D definition, CommandsManager commandsManager, ValueContext<T> valueContext, Context context, AsyncActionExecutor asyncActionExecutor) {
          super(definition);
          this.commandsManager = commandsManager;
          this.valueContext = valueContext;
          this.context = context;
          this.asyncActionExecutor = asyncActionExecutor;
      }
  
      @Override
      public void execute() {
          Collection<T> items = resolveTargetItems();
          if (getDefinition().isAsynchronous()) {
              executeAsynchronously(items);
          } else {
              executeSynchronously(items);
          }
      }
  
      protected Collection<T> resolveTargetItems() {
          return valueContext.get().collect(Collectors.toList());
      }
  
      protected Map<String, Object> buildParams(T item) {
          Map<String, Object> params = new HashMap<>(getDefinition().getParams());
          params.put(Context.ATTRIBUTE_USERNAME, context.getUser().getName());
          return params;
      }
  
      protected ValueContext<T> getValueContext() {
          return valueContext;
      }
  
      private void executeAsynchronously(Collection<T> items) {
          asyncActionExecutor.execute(AsyncActionExecutor.AsyncAction.builder()
                 .action(() -> executeSynchronously(items))
                 .delaySeconds(getDefinition().getDelay())
                 .timeToWaitMilliseconds(getDefinition().getTimeToWait())
                 .description(String.format(getDefinition().getDescription(), items))
                 .successMessage(getDefinition().isNotifyUser() ? getDefinition().getSuccessMessage() : null)
                 .failureMessage(getDefinition().getFailureMessage())
                 .build()
         );
     }
 
     private void executeSynchronously(Collection<T> items) {
         items.forEach(Exceptions.wrap().consumer(
                 item -> commandsManager.executeCommand(getDefinition().getCatalog(), getDefinition().getCommand(), buildParams(item))
         ));
     }
 }