/**
 * Copyright (C) 2009 eXo Platform SAS.
 *
 * This 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 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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 this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.exoplatform.organization.webui.component;

import java.io.Writer;
import java.util.List;

import org.exoplatform.commons.serialization.api.annotations.Serialized;
import org.exoplatform.portal.config.UserACL;
import org.exoplatform.services.organization.MembershipType;
import org.exoplatform.services.organization.OrganizationService;
import org.exoplatform.web.application.ApplicationMessage;
import org.exoplatform.webui.application.WebuiRequestContext;
import org.exoplatform.webui.config.annotation.ComponentConfig;
import org.exoplatform.webui.config.annotation.EventConfig;
import org.exoplatform.webui.core.UIApplication;
import org.exoplatform.webui.core.UIComponent;
import org.exoplatform.webui.core.UIContainer;
import org.exoplatform.webui.core.UIGrid;
import org.exoplatform.webui.core.UIPageIterator;
import org.exoplatform.webui.event.Event;
import org.exoplatform.webui.event.EventListener;

@ComponentConfig(events = {
        @EventConfig(listeners = UIListMembershipType.EditMembershipActionListener.class),
        @EventConfig(listeners = UIListMembershipType.DeleteMembershipActionListener.class, confirm = "UIListMembershipType.deleteMemberShip") })
@Serialized
public class UIListMembershipType extends UIContainer {

    private static String[] USER_BEAN_FIELD = { "name", "createdDate", "modifiedDate", "description" };

    private static String[] USER_ACTION = { "EditMembership", "DeleteMembership" };

    public UIListMembershipType() throws Exception {
        UIGrid uiGrid = addChild(UIGrid.class, null, "UIGrid");
        uiGrid.configure("name", USER_BEAN_FIELD, USER_ACTION);
        uiGrid.getUIPageIterator().setId("UIListMembershipTypeIterator");
        loadData();
    }

    public UIComponent getViewModeUIComponent() {
        return null;
    }

    public String getName() {
        return "UIMembershipList";
    }

    public void loadData() {
        int currentPage = getChild(UIGrid.class).getUIPageIterator().getCurrentPage();
        getChild(UIGrid.class).getUIPageIterator().setPageList(new FindMembershipTypesPageList(5));
        try {
            getChild(UIGrid.class).getUIPageIterator().setCurrentPage(currentPage);
        } catch (Exception e) {
        }
    }

    public void processRender(WebuiRequestContext context) throws Exception {
        loadData();
        Writer w = context.getWriter();
        w.write("<div class=\"UIListMembershipType\">");
        renderChildren();
        w.write("</div>");
    }

    public static class EditMembershipActionListener extends EventListener<UIListMembershipType> {
        public void execute(Event<UIListMembershipType> event) throws Exception {
            UIListMembershipType uiMembership = event.getSource();
            String name = event.getRequestContext().getRequestParameter(OBJECTID);

            OrganizationService service = uiMembership.getApplicationComponent(OrganizationService.class);
            MembershipType mt = service.getMembershipTypeHandler().findMembershipType(name);

            if (mt == null) {
                UIApplication uiApp = event.getRequestContext().getUIApplication();
                uiApp.addMessage(new ApplicationMessage("UIMembershipTypeForm.msg.MembershipNotExist", new String[] { name }));
                uiMembership.loadData();
                return;
            }

            if (mt.getDescription() == null) {
                mt.setDescription("");
            }
            UIMembershipManagement uiMembershipManager = uiMembership.getParent();
            UIMembershipTypeForm uiForm = uiMembershipManager.getChild(UIMembershipTypeForm.class);
            uiForm.setMembershipType(mt);
        }
    }

    public static class DeleteMembershipActionListener extends EventListener<UIListMembershipType> {
        public void execute(Event<UIListMembershipType> event) throws Exception {
            UIListMembershipType uiMembership = event.getSource();
            String name = event.getRequestContext().getRequestParameter(OBJECTID);
            UIMembershipManagement membership = uiMembership.getParent();
            UIMembershipTypeForm uiForm = membership.findFirstComponentOfType(UIMembershipTypeForm.class);

            String existMembershipTypeName = uiForm.getMembershipTypeName();
            if (existMembershipTypeName != null && existMembershipTypeName.equals(name)) {
                UIApplication uiApp = event.getRequestContext().getUIApplication();
                uiApp.addMessage(new ApplicationMessage("UIMembershipList.msg.InUse", null));
                return;
            }

            // Check to see whether given membershiptype is mandatory or not
            UserACL acl = uiMembership.getApplicationComponent(UserACL.class);
            List<String> mandatories = acl.getMandatoryMSTypes();
            if (!mandatories.isEmpty() && mandatories.contains(name)) {
                UIApplication uiApp = event.getRequestContext().getUIApplication();
                uiApp.addMessage(new ApplicationMessage("UIMembershipList.msg.DeleteMandatory", null));
                return;
            }

            OrganizationService service = uiMembership.getApplicationComponent(OrganizationService.class);
            MembershipType membershipType = service.getMembershipTypeHandler().findMembershipType(name);
            UIPageIterator pageIterator = uiMembership.getChild(UIGrid.class).getUIPageIterator();
            int currentPage = -1;
            if (membershipType != null) {
                currentPage = pageIterator.getCurrentPage();
                service.getMembershipTypeHandler().removeMembershipType(name, true);
                membership.deleteOptions(membershipType);
            }
            uiMembership.loadData();
            if (currentPage >= 0) {
                while (currentPage > pageIterator.getAvailablePage())
                    currentPage--;
                pageIterator.setCurrentPage(currentPage);
            }
        }
    }

}
