/*
GanttProject is an opensource project management tool. License: GPL3
Copyright (C) 2011 GanttProject Team

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 3
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package net.sourceforge.ganttproject.action.resource;

import java.awt.event.ActionEvent;

import net.sourceforge.ganttproject.action.GPAction;
import net.sourceforge.ganttproject.gui.UIFacade;
import net.sourceforge.ganttproject.gui.UIFacade.Choice;
import net.sourceforge.ganttproject.resource.AssignmentContext;
import net.sourceforge.ganttproject.task.ResourceAssignment;
import net.sourceforge.ganttproject.util.StringUtils;

/**
 * Action that deletes the assignment of a task to a resource
 */
public class AssignmentDeleteAction extends GPAction {
  private final AssignmentContext myContext;

  private final UIFacade myUIFacade;

  public AssignmentDeleteAction(AssignmentContext context, UIFacade uiFadade) {
    super("assignment.delete", IconSize.TOOLBAR_SMALL);
    myContext = context;
    myUIFacade = uiFadade;
  }

  @Override
  public void actionPerformed(ActionEvent e) {
    final ResourceAssignment[] context = myContext.getResourceAssignments();
    if (context != null && context.length > 0) {
      Choice choice = myUIFacade.showConfirmationDialog(getI18n("msg23") + " " + StringUtils.getDisplayNames(context)
          + "?", getI18n("warning"));
      if (choice == Choice.YES) {
        myUIFacade.getUndoManager().undoableEdit(getLocalizedDescription(), new Runnable() {
          @Override
          public void run() {
            deleteAssignments(context);
            myUIFacade.refresh();
          }
        });
      }
    }
  }

  private void deleteAssignments(ResourceAssignment[] context) {
    for (ResourceAssignment ra : context) {
      ra.delete();
      ra.getTask().getAssignmentCollection().deleteAssignment(ra.getResource());
    }
  }
}