/*
 * Copyright (C) 2003-2004 Red Hat Inc. All Rights Reserved.
 *
 * This library 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 library 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 library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */
package com.arsdigita.cms.ui.lifecycle;

import com.arsdigita.bebop.ControlLink;
import com.arsdigita.bebop.Label;
import com.arsdigita.bebop.Page;
import com.arsdigita.bebop.PageState;
import com.arsdigita.bebop.event.ActionEvent;
import com.arsdigita.bebop.event.ActionListener;
import com.arsdigita.cms.CMS;
import com.arsdigita.cms.CMSConfig;
import com.arsdigita.cms.ContentItem;
import com.arsdigita.cms.lifecycle.Lifecycle;
import com.arsdigita.cms.ui.BaseItemPane;
import com.arsdigita.cms.ui.ContentItemPage;
import com.arsdigita.cms.ui.item.ContentItemRequestLocal;
import com.arsdigita.toolbox.ui.LayoutPanel;
import com.arsdigita.web.RedirectSignal;
import com.arsdigita.web.URL;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.Logger;

/**
 * @author Michael Pih
 * @author Jack Chung
 * @author Justin Ross <jross@redhat.com>
 * @author Jens Pelzetter jens@jp-digital.de
 * @version $Id: ItemLifecycleAdminPane.java 1942 2009-05-29 07:53:23Z terry $
 */
public class ItemLifecycleAdminPane extends BaseItemPane {

    private static final Logger s_log = Logger.getLogger(
            ItemLifecycleAdminPane.class);
    private final ContentItemRequestLocal m_item;
    private final LifecycleRequestLocal m_lifecycle;
    private final LayoutPanel m_introPane;
    private final LayoutPanel m_detailPane;
    private final LayoutPanel m_selectPane;
    private final LayoutPanel m_lockedPane;
    private final LayoutPanel m_errorPane;

    public ItemLifecycleAdminPane(final ContentItemRequestLocal item) {
        m_item = item;
        m_lifecycle = new ItemLifecycleRequestLocal();

        m_introPane = new LayoutPanel();
        add(m_introPane);

        final Label message = new Label(gz("cms.ui.item.lifecycle.intro"));
        m_introPane.setBody(message);

        m_detailPane = new LayoutPanel();
        add(m_detailPane);

        final ItemLifecycleItemPane itemPane =
                                    new ItemLifecycleItemPane(m_item,
                                                              m_lifecycle);
        m_detailPane.setBody(itemPane);

        m_selectPane = new LayoutPanel();
        add(m_selectPane);

        final ItemLifecycleSelectForm selectForm =
                                      new ItemLifecycleSelectForm(m_item);
        m_selectPane.setBody(selectForm);

        m_lockedPane = new LayoutPanel();
        add(m_lockedPane);

        final Label lockedMsg = new Label(gz(
                "cms.ui.item.lifecycle.publish_locked"));
        m_lockedPane.setBody(lockedMsg);
        final ControlLink lockedUpdateLink = new ControlLink(new Label(gz(
                "cms.ui.item.lifecycle.publish_locked.update")));
        lockedUpdateLink.addActionListener(new ActionListener() {

            public void actionPerformed(final ActionEvent event) {
                throw new RedirectSignal(
                        URL.getDispatcherPath()
                        + ContentItemPage.getItemURL(
                        item.getContentItem(event.getPageState()),
                        ContentItemPage.PUBLISHING_TAB),
                        true);
            }
        });
        m_lockedPane.setBottom(lockedUpdateLink);

        m_errorPane = new LayoutPanel();
        add(m_errorPane);

        final Label errorMsg = new Label(gz("cms.ui.lifecycle.publish.error"));
        m_errorPane.setBody(errorMsg);

        connect(selectForm, m_detailPane);                
    }

    private class ItemLifecycleRequestLocal extends LifecycleRequestLocal {

        protected final Object initialValue(final PageState state) {
            final ContentItem item = m_item.getContentItem(state);
            final Lifecycle lifecycle = item.getLifecycle();

            s_log.debug("Returning lifecycle " + lifecycle);

            return lifecycle;
        }
    }

    public final void register(final Page page) {
        super.register(page);

        page.addActionListener(new VisibilityListener());
    }

    private class VisibilityListener implements ActionListener {

        public final void actionPerformed(final ActionEvent e) {
            s_log.debug("Determining which pane to show");

            final PageState state = e.getPageState();

            if (CMSConfig.getInstanceOf().getThreadedPublishing()
                && PublishLock.getInstance().isLocked(m_item.getContentItem(
                    state))) {
                if (PublishLock.getInstance().hasError(m_item.getContentItem(
                        state))) {
                    push(state, m_errorPane);
                } else {
                    push(state, m_lockedPane);
                    state.getResponse().addIntHeader("Refresh", 5);
                }
            } else {
                if (state.isVisibleOnPage(ItemLifecycleAdminPane.this)) {
                    if (m_lifecycle.getLifecycle(state) == null) {
                        if (hasPermission(state)) {
                            push(state, m_selectPane);
                        } else {
                            push(state, m_introPane);
                        }
                    } else {
                        push(state, m_detailPane);
                    }
                }
            }
        }
    }

    private boolean hasPermission(final PageState state) {
        final ContentItem item = m_item.getContentItem(state);

        return CMS.getContext().getSecurityManager().canAccess(
                state.getRequest(), SCHEDULE_PUBLICATION, item);
    }
}