/*
 *  Copyright 2018 Anyware Services
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.ametys.plugins.ugc.page;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Locale;
import java.util.Map;
import java.util.Set;

import org.ametys.cms.repository.Content;
import org.ametys.core.group.GroupIdentity;
import org.ametys.core.user.UserIdentity;
import org.ametys.plugins.explorer.resources.ResourceCollection;
import org.ametys.plugins.repository.ACLAmetysObject;
import org.ametys.plugins.repository.AmetysObject;
import org.ametys.plugins.repository.AmetysObjectIterable;
import org.ametys.plugins.repository.AmetysObjectResolver;
import org.ametys.plugins.repository.AmetysRepositoryException;
import org.ametys.plugins.repository.CollectionIterable;
import org.ametys.plugins.repository.UnknownAmetysObjectException;
import org.ametys.plugins.repository.data.holder.ModelLessDataHolder;
import org.ametys.plugins.repository.data.holder.impl.DefaultModelLessDataHolder;
import org.ametys.plugins.repository.data.repositorydata.RepositoryData;
import org.ametys.plugins.repository.data.repositorydata.impl.MemoryRepositoryData;
import org.ametys.plugins.repository.data.type.RepositoryModelItemType;
import org.ametys.runtime.plugin.component.AbstractThreadSafeComponentExtensionPoint;
import org.ametys.web.repository.page.Page;
import org.ametys.web.repository.page.UnknownZoneException;
import org.ametys.web.repository.page.Zone;
import org.ametys.web.repository.site.Site;
import org.ametys.web.repository.sitemap.Sitemap;
import org.ametys.web.service.ServiceExtensionPoint;
import org.ametys.web.skin.Skin;
import org.ametys.web.skin.SkinsManager;

/**
 * Page representing an UGC page.
 */
public class UGCPage implements Page, ACLAmetysObject
{
    private static final String __UGC_PAGE_TEMPLATE = "ugc-page";
    
    private Page _root;
    private String _title;
    private AmetysObjectResolver _resolver;
    private UGCPageHandler _ugcPageHandler;
    private SkinsManager _skinsManager;
    private String _path;
    private Content _ugcContent;
    private AbstractThreadSafeComponentExtensionPoint<RepositoryModelItemType> _pageDataTypeExtensionPoint;
    private AbstractThreadSafeComponentExtensionPoint<RepositoryModelItemType> _zoneDataTypeExtensionPoint;
    private ServiceExtensionPoint _serviceExtensionPoint;
    private AbstractThreadSafeComponentExtensionPoint<RepositoryModelItemType> _zoneItemDataTypeExtensionPoint;
    
    /**
     * Constructor.
     * @param root the root page.
     * @param syncContent the synchronized content
     * @param path the path
     * @param resolver the {@link AmetysObjectResolver}.
     * @param ugcPageHandler the ugc page handler
     * @param skinsManager the skins manager
     * @param pageDataTypeExtensionPoint the extension point with available data types for pages
     * @param zoneDataTypeExtensionPoint the extension point with available data types for zones
     * @param serviceExtensionPoint the service extension point
     * @param zoneItemDataTypeExtensionPoint the extension point with available data types for zone items
     */
    public UGCPage(Page root, Content syncContent, String path, AmetysObjectResolver resolver, UGCPageHandler ugcPageHandler, SkinsManager skinsManager, AbstractThreadSafeComponentExtensionPoint<RepositoryModelItemType> pageDataTypeExtensionPoint, AbstractThreadSafeComponentExtensionPoint<RepositoryModelItemType> zoneDataTypeExtensionPoint, ServiceExtensionPoint serviceExtensionPoint, AbstractThreadSafeComponentExtensionPoint<RepositoryModelItemType> zoneItemDataTypeExtensionPoint)
    {
        _root = root;
        _path = path;
        _resolver = resolver;
        _ugcPageHandler = ugcPageHandler;
        _skinsManager = skinsManager;
        _ugcContent = syncContent;
        _title = _ugcContent.getTitle(new Locale(root.getSitemapName()));
        
        _pageDataTypeExtensionPoint = pageDataTypeExtensionPoint;
        _zoneDataTypeExtensionPoint = zoneDataTypeExtensionPoint;
        _serviceExtensionPoint = serviceExtensionPoint;
        _zoneItemDataTypeExtensionPoint = zoneItemDataTypeExtensionPoint;
    }
    
    /**
     * Returns the associated synchronizable {@link Content}.
     * @return the associated synchronizable {@link Content}.
     */
    public Content getSyncContent()
    {
        return _ugcContent;
    }
    
    @Override
    public int getDepth() throws AmetysRepositoryException
    {
        return _root.getDepth() + (_path.equals("_root") ? 1 : 2);
    }

    @Override
    public Set<String> getReferers() throws AmetysRepositoryException
    {
        return null;
    }

    @Override
    public ResourceCollection getRootAttachments() throws AmetysRepositoryException
    {
        return null;
    }

    @Override
    public String getTemplate() throws AmetysRepositoryException
    {
        Skin skin = _skinsManager.getSkin(getSite().getSkinId());
        
        if (skin.getTemplate(__UGC_PAGE_TEMPLATE) != null)
        {
            return __UGC_PAGE_TEMPLATE;
        }
        
        return "page"; 
    }

    @Override
    public String getTitle() throws AmetysRepositoryException
    {
        return _title;
    }
    
    @Override
    public String getLongTitle() throws AmetysRepositoryException
    {
        return _title;
    }

    @Override
    public PageType getType() throws AmetysRepositoryException
    {
        return PageType.CONTAINER;
    }

    @Override
    public String getURL() throws AmetysRepositoryException
    {
        throw new UnsupportedOperationException("#getURL is not supported on virtual ugc pages");
    }

    @Override
    public LinkType getURLType() throws AmetysRepositoryException
    {
        throw new UnsupportedOperationException("#getURLType is not supported on virtual ugc pages");
    }

    @Override
    public Zone getZone(String name) throws UnknownZoneException, AmetysRepositoryException
    {
        if (!"default".equals(name))
        {
            throw new IllegalArgumentException("Only the zone named 'default' is actually supported on virtual ugc pages.");
        }
        
        return new UGCZone(this, _zoneDataTypeExtensionPoint, _zoneItemDataTypeExtensionPoint);
    }

    @Override
    public AmetysObjectIterable< ? extends Zone> getZones() throws AmetysRepositoryException
    {
        ArrayList<Zone> zones = new ArrayList<>();
        zones.add(new UGCZone(this, _zoneDataTypeExtensionPoint, _zoneItemDataTypeExtensionPoint));
        return new CollectionIterable<>(zones);
    }

    @Override
    public boolean hasZone(String name) throws AmetysRepositoryException
    {
        return "default".equals(name);
    }

    @Override
    public AmetysObjectIterable<? extends Page> getChildrenPages() throws AmetysRepositoryException
    {
        ArrayList<Page> children = new ArrayList<>();
        return new CollectionIterable<>(children);
    }

    @Override
    public String getPathInSitemap() throws AmetysRepositoryException
    {
        if (_path.equals("_root"))
        {
            return _root.getPathInSitemap() + "/" + getName();
        }
        else
        {
            return _root.getPathInSitemap() + "/" + _path + "/" + getName();
        }
    }

    @Override
    public Site getSite() throws AmetysRepositoryException
    {
        return _root.getSite();
    }

    @Override
    public String getSiteName() throws AmetysRepositoryException
    {
        return _root.getSiteName();
    }

    @Override
    public Sitemap getSitemap() throws AmetysRepositoryException
    {
        return _root.getSitemap();
    }

    @Override
    public String getSitemapName() throws AmetysRepositoryException
    {
        return _root.getSitemapName();
    }

    @Override
    public <A extends AmetysObject> A getChild(String path) throws AmetysRepositoryException, UnknownAmetysObjectException
    {
        if (path.isEmpty())
        {
            throw new AmetysRepositoryException("path must be non empty");
        }
        
        return null;
    }

    @SuppressWarnings("unchecked")
    @Override
    public AmetysObjectIterable<? extends AmetysObject> getChildren() throws AmetysRepositoryException
    {
        return getChildrenPages();
    }

    @Override
    public boolean hasChild(String name) throws AmetysRepositoryException
    {
        return false;
    }
    
    @Override
    public String getId() throws AmetysRepositoryException
    {
        // E.g: ugccontent://path?rootId=...&contentId=...
        return "ugccontent://" + _path + "?rootId=" + _root.getId() + "&contentId=" + _ugcContent.getId();
    }

    @Override
    public String getName() throws AmetysRepositoryException
    {
        return _ugcContent.getName();
    }
    
    @SuppressWarnings("unchecked")
    @Override
    public Page getParent() throws AmetysRepositoryException
    {
        if (!_path.equals("_root"))
        {
            String name = _path;
            Map<String, Map<String, String>> transitionalPageName = _ugcPageHandler.getTransitionalPage(_root);
            Map<String, String> attributes = transitionalPageName.get(name);
            String title = attributes.get(UGCPageHandler.ATTRIBUTE_TRANSITIONAL_PAGE_TITLE);
            String metadataValue = attributes.get(UGCPageHandler.ATTRIBUTE_TRANSITIONAL_PAGE_METADATA_VALUE);
            return new UGCTransitionalPage(_root, title, metadataValue, name, _resolver, _ugcPageHandler, _skinsManager, _pageDataTypeExtensionPoint, _zoneDataTypeExtensionPoint, _serviceExtensionPoint, _zoneItemDataTypeExtensionPoint);
        }
        else
        {
            return _root;
        }
    }

    @Override
    public String getParentPath() throws AmetysRepositoryException
    {
        if (!_path.equals("_root"))
        {
            return _root.getPath() + "/" + _path;
        }
        else
        {
            return _root.getPath();
        }
    }

    @Override
    public String getPath() throws AmetysRepositoryException
    {
        return getParentPath() + "/" + getName();
    }

    public ModelLessDataHolder getDataHolder()
    {
        RepositoryData repositoryData = new MemoryRepositoryData(getName());
        return new DefaultModelLessDataHolder(_pageDataTypeExtensionPoint, repositoryData);
    }

    @Override
    public Set<String> getTags() throws AmetysRepositoryException
    {
        return Collections.emptySet();
    }

    @Override
    public AmetysObjectIterable< ? extends Page> getChildrenPages(boolean includeInvisiblePage) throws AmetysRepositoryException
    {
        ArrayList<Page> children = new ArrayList<>();
        return new CollectionIterable<>(children);
    }

    @Override
    public boolean isVisible() throws AmetysRepositoryException
    {
        return true;
    }

    @Override
    public Page getChildPageAt(int index) throws UnknownAmetysObjectException, AmetysRepositoryException
    {
        throw new UnknownAmetysObjectException("There is no child for ugc page");
    }

    @Override
    public Set<String> getAllowedProfilesForAnyConnectedUser()
    {
        return Collections.EMPTY_SET;
    }

    @Override
    public Set<String> getDeniedProfilesForAnyConnectedUser()
    {
        return Collections.EMPTY_SET;
    }
    
    @Override
    public Set<String> getAllowedProfilesForAnonymous()
    {
        return Collections.EMPTY_SET;
    }

    @Override
    public Set<String> getDeniedProfilesForAnonymous()
    {
        return Collections.EMPTY_SET;
    }

    @Override
    public Set<String> getAllowedProfilesForUser(UserIdentity user)
    {
        return Collections.EMPTY_SET;
    }

    @Override
    public Map<UserIdentity, Set<String>> getAllowedProfilesForUsers()
    {
        return Collections.EMPTY_MAP;
    }

    @Override
    public Set<UserIdentity> getAllowedUsers(String profileId)
    {
        return Collections.EMPTY_SET;
    }

    @Override
    public Map<GroupIdentity, Set<String>> getAllowedProfilesForGroups()
    {
        return Collections.EMPTY_MAP;
    }

    @Override
    public Set<GroupIdentity> getAllowedGroups(String profileId)
    {
        return Collections.EMPTY_SET;
    }
    
    @Override
    public Set<String> getDeniedProfilesForUser(UserIdentity user)
    {
        return Collections.EMPTY_SET;
    }

    @Override
    public Map<UserIdentity, Set<String>> getDeniedProfilesForUsers()
    {
        return Collections.EMPTY_MAP;
    }

    @Override
    public Set<UserIdentity> getDeniedUsers(String profileId)
    {
        return Collections.EMPTY_SET;
    }

    @Override
    public Map<GroupIdentity, Set<String>> getDeniedProfilesForGroups()
    {
        return Collections.EMPTY_MAP;
    }

    @Override
    public Set<GroupIdentity> getDeniedGroups(String profileId)
    {
        return Collections.EMPTY_SET;
    }
}