/**
 * Licensed to Apereo under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright ownership. Apereo
 * licenses this file to you 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 the
 * following location:
 *
 * <p>http://www.apache.org/licenses/LICENSE-2.0
 *
 * <p>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.apereo.portal.portlet.registry;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import javax.portlet.WindowState;
import org.apache.commons.lang.Validate;
import org.apereo.portal.layout.om.IStylesheetDescriptor;
import org.apereo.portal.portlet.om.IPortletDefinition;
import org.apereo.portal.portlet.om.IPortletDefinitionId;
import org.apereo.portal.portlet.om.IPortletEntity;
import org.apereo.portal.portlet.om.IPortletEntityDescriptor;
import org.apereo.portal.portlet.om.IPortletEntityId;
import org.apereo.portal.portlet.om.IPortletPreference;

/**
 * Portlet entity data that is not persisted. Used when the entity doesn't have any customizations.
 *
 */
class SessionPortletEntityImpl implements IPortletEntity, IPortletEntityDescriptor {
    private final IPortletDefinition portletDefinition;
    private final PortletEntityData portletEntityData;
    private final Map<Long, WindowState> windowStates = new ConcurrentHashMap<Long, WindowState>();
    private List<IPortletPreference> portletPreferences = new ArrayList<IPortletPreference>(0);

    public SessionPortletEntityImpl(
            IPortletDefinition portletDefinition, PortletEntityData portletEntityData) {
        Validate.notNull(portletDefinition, "portletDefinition cannot be null");
        Validate.notNull(portletEntityData, "portletEntityData cannot be null");

        this.portletDefinition = portletDefinition;
        this.portletEntityData = portletEntityData;
    }

    public PortletEntityData getPortletEntityData() {
        return this.portletEntityData;
    }

    @Override
    public IPortletDefinitionId getPortletDefinitionId() {
        return this.portletDefinition.getPortletDefinitionId();
    }

    @Override
    public IPortletEntityId getPortletEntityId() {
        return this.portletEntityData.getPortletEntityId();
    }

    @Override
    public IPortletDefinition getPortletDefinition() {
        return this.portletDefinition;
    }

    @Override
    public String getLayoutNodeId() {
        return this.portletEntityData.getLayoutNodeId();
    }

    @Override
    public int getUserId() {
        return this.portletEntityData.getUserId();
    }

    @Override
    public Map<Long, WindowState> getWindowStates() {
        return Collections.unmodifiableMap(this.windowStates);
    }

    @Override
    public WindowState getWindowState(IStylesheetDescriptor stylesheetDescriptor) {
        return windowStates.get(stylesheetDescriptor.getId());
    }

    @Override
    public void setWindowState(IStylesheetDescriptor stylesheetDescriptor, WindowState state) {
        if (state == null) {
            windowStates.remove(stylesheetDescriptor.getId());
        } else {
            windowStates.put(stylesheetDescriptor.getId(), state);
        }
    }

    /* (non-Javadoc)
     * @see org.apereo.portal.portlet.om.IPortletEntity#getPortletPreferences()
     */
    @Override
    public List<IPortletPreference> getPortletPreferences() {
        return portletPreferences;
    }

    /* (non-Javadoc)
     * @see org.apereo.portal.portlet.om.IPortletEntity#setPortletPreferences(java.util.List)
     */
    @Override
    public boolean setPortletPreferences(List<IPortletPreference> portletPreferences) {
        if (portletPreferences == null) {
            final boolean modified = !this.portletPreferences.isEmpty();
            this.portletPreferences.clear();
            return modified;
        }

        final boolean modified = !this.portletPreferences.equals(portletPreferences);
        this.portletPreferences = portletPreferences;
        return modified;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result =
                prime * result
                        + ((this.portletEntityData.getLayoutNodeId() == null)
                                ? 0
                                : this.portletEntityData.getLayoutNodeId().hashCode());
        result =
                prime * result
                        + ((this.portletDefinition == null)
                                ? 0
                                : this.portletDefinition.hashCode());
        result = prime * result + this.portletEntityData.getUserId();
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) return true;
        if (obj == null) return false;
        if (!IPortletEntity.class.isAssignableFrom(obj.getClass())) return false;
        IPortletEntity other = (IPortletEntity) obj;
        if (this.portletEntityData.getLayoutNodeId() == null) {
            if (other.getLayoutNodeId() != null) return false;
        } else if (!this.portletEntityData.getLayoutNodeId().equals(other.getLayoutNodeId()))
            return false;
        if (this.portletDefinition == null) {
            if (other.getPortletDefinition() != null) return false;
        } else if (!this.portletDefinition.equals(other.getPortletDefinition())) return false;
        if (this.portletEntityData.getUserId() != other.getUserId()) return false;
        return true;
    }

    @Override
    public String toString() {
        return "PortletEntity ["
                + "portletEntityId="
                + this.portletEntityData.getPortletEntityId()
                + ", "
                + "layoutNodeId="
                + this.portletEntityData.getLayoutNodeId()
                + ", "
                + "userId="
                + this.portletEntityData.getUserId()
                + ", "
                + "portletDefinition="
                + this.portletDefinition
                + "]";
    }
}