/*
 * @(#)VisibilityListViewer.java
 *
 * Copyright 2011 Instituto Superior Tecnico
 * Founding Authors: Luis Cruz, Sérgio Silva
 * 
 *      https://fenix-ashes.ist.utl.pt/
 * 
 *   This file is part of the File Management Module.
 *
 *   The File Management Module is free software: you can
 *   redistribute it and/or modify it under the terms of the GNU Lesser General
 *   Public License as published by the Free Software Foundation, either version 
 *   3 of the License, or (at your option) any later version.
 *
 *   The File Management  Module 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 Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with the File Management  Module. If not, see <http://www.gnu.org/licenses/>.
 * 
 */
package module.fileManagement.presentationTier.component.viewers;

import module.fileManagement.domain.FileManagementSystem;
import module.fileManagement.domain.VisibilityGroup;
import module.fileManagement.domain.VisibilityList;
import pt.ist.bennu.core.domain.groups.AnyoneGroup;
import pt.ist.bennu.core.domain.groups.EmptyGroup;
import pt.ist.bennu.core.domain.groups.SingleUserGroup;

import com.vaadin.data.Property.ValueChangeListener;

/**
 * 
 * @author Sérgio Silva
 * 
 */
public class VisibilityListViewer extends com.vaadin.ui.Label implements ValueChangeListener {

    public enum VisibilityType {
        PRIVATE("label.visibility.private"), SHARED("label.visibility.shared"), PUBLIC("label.visibility.public");

        private final String typeKey;

        VisibilityType(String type) {
            typeKey = type;
        }

        public String getTypeKey() {
            return typeKey;
        }
    }

    public VisibilityListViewer() {
        addStyleName("visibility-viewer");
    }

    public VisibilityList getPropertyValue() {
        return (VisibilityList) getValue();
    }

    // public String getVisibility() {
    // final PersistentGroup readGroup = getReadGroup();
    // final String key = readGroup instanceof SingleUserGroup ?
    // "label.visibility.private"
    // : readGroup instanceof AnyoneGroup ? "label.visibility.public" :
    // "label.visibility.shared";
    // return FileManagementSystem.getMessage(key);
    // }

    public boolean isPublicAccess() {
        for (VisibilityGroup group : getPropertyValue()) {
            if (group.persistentGroup instanceof AnyoneGroup) {
                return true;
            }
        }
        return false;
    }

    protected VisibilityType getVisibilityType() {
        final VisibilityList list = getPropertyValue();
        if (isPublicAccess()) {
            return VisibilityType.PUBLIC;
        } else {
            if (list.size() == 1 && list.contains(SingleUserGroup.class) || list.size() == 2
                    && list.contains(SingleUserGroup.class) && list.contains(EmptyGroup.class)) {
                return VisibilityType.PRIVATE;
            } else {
                return VisibilityType.SHARED;
            }
        }
    }

    @Override
    public String toString() {
        return FileManagementSystem.getMessage(getVisibilityType().getTypeKey());
    }

    @Override
    public String getDescription() {
        return getPropertyValue().getDescription();
    }
}