/**
 * 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.delegation;

import javax.portlet.PortletRequest;
import javax.servlet.http.HttpServletRequest;
import org.apereo.portal.api.portlet.PortletDelegationDispatcher;
import org.apereo.portal.api.portlet.PortletDelegationLocator;
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.IPortletEntityId;
import org.apereo.portal.portlet.om.IPortletWindow;
import org.apereo.portal.portlet.om.IPortletWindowId;
import org.apereo.portal.portlet.registry.IPortletDefinitionRegistry;
import org.apereo.portal.portlet.registry.IPortletEntityRegistry;
import org.apereo.portal.portlet.registry.IPortletWindowRegistry;
import org.apereo.portal.portlet.rendering.IPortletRenderer;
import org.apereo.portal.security.IPerson;
import org.apereo.portal.security.IPersonManager;
import org.apereo.portal.url.IPortalRequestUtils;
import org.apereo.portal.url.IPortalUrlProvider;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 */
@Service
public class PortletDelegationLocatorImpl implements PortletDelegationLocator {
    private IPortletDefinitionRegistry portletDefinitionRegistry;
    private IPortalRequestUtils portalRequestUtils;
    private IPersonManager personManager;
    private IPortletEntityRegistry portletEntityRegistry;
    private IPortletWindowRegistry portletWindowRegistry;
    private IPortletRenderer portletRenderer;
    private IPortalUrlProvider portalUrlProvider;
    private IPortletDelegationManager portletDelegationManager;

    @Autowired
    public void setPortletDelegationManager(IPortletDelegationManager portletDelegationManager) {
        this.portletDelegationManager = portletDelegationManager;
    }

    @Autowired
    public void setPortletDefinitionRegistry(IPortletDefinitionRegistry portletDefinitionRegistry) {
        this.portletDefinitionRegistry = portletDefinitionRegistry;
    }

    @Autowired
    public void setPortalRequestUtils(IPortalRequestUtils portalRequestUtils) {
        this.portalRequestUtils = portalRequestUtils;
    }

    @Autowired
    public void setPersonManager(IPersonManager personManager) {
        this.personManager = personManager;
    }

    @Autowired
    public void setPortletEntityRegistry(IPortletEntityRegistry portletEntityRegistry) {
        this.portletEntityRegistry = portletEntityRegistry;
    }

    @Autowired
    public void setPortletWindowRegistry(IPortletWindowRegistry portletWindowRegistry) {
        this.portletWindowRegistry = portletWindowRegistry;
    }

    @Autowired
    public void setPortletRenderer(IPortletRenderer portletRenderer) {
        this.portletRenderer = portletRenderer;
    }

    @Autowired
    public void setPortalUrlProvider(IPortalUrlProvider portalUrlProvider) {
        this.portalUrlProvider = portalUrlProvider;
    }

    /* (non-Javadoc)
     * @see org.apereo.portal.api.portlet.PortletDelegationLocator#createRequestDispatcher(java.lang.String)
     */
    @Override
    public PortletDelegationDispatcher createRequestDispatcher(
            PortletRequest portletRequest, String fName) {
        final IPortletDefinition portletDefinition =
                this.portletDefinitionRegistry.getPortletDefinitionByFname(fName);
        final IPortletDefinitionId portletDefinitionId = portletDefinition.getPortletDefinitionId();

        return this.createRequestDispatcher(portletRequest, portletDefinitionId);
    }

    /* (non-Javadoc)
     * @see org.apereo.portal.api.portlet.PortletDelegationLocator#createRequestDispatcher(org.apereo.portal.portlet.om.IPortletDefinitionId)
     */
    @Override
    public PortletDelegationDispatcher createRequestDispatcher(
            PortletRequest portletRequest, IPortletDefinitionId delegatePortletDefinitionId) {
        final HttpServletRequest request =
                this.portalRequestUtils.getPortletHttpRequest(portletRequest);

        final String windowID = portletRequest.getWindowID();
        final IPortletWindowId parentPortletWindowId =
                this.portletWindowRegistry.getPortletWindowId(request, windowID);

        final IPortletEntity delegatePortletEntity =
                this.portletEntityRegistry.getOrCreateDelegatePortletEntity(
                        request, parentPortletWindowId, delegatePortletDefinitionId);
        final IPortletEntityId delegatePortletEntityId = delegatePortletEntity.getPortletEntityId();

        final IPortletWindow delegatePortletWindow =
                this.portletWindowRegistry.createDelegatePortletWindow(
                        request, delegatePortletEntityId, parentPortletWindowId);

        final IPerson person = this.personManager.getPerson(request);
        final int userId = person.getID();

        return new PortletDelegationDispatcherImpl(
                delegatePortletWindow,
                userId,
                portalRequestUtils,
                personManager,
                portletRenderer,
                portalUrlProvider,
                portletDelegationManager);
    }

    /* (non-Javadoc)
     * @see org.apereo.portal.api.portlet.PortletDelegationLocator#getRequestDispatcher(org.apereo.portal.portlet.om.IPortletWindowId)
     */
    @Override
    public PortletDelegationDispatcher getRequestDispatcher(
            PortletRequest portletRequest, IPortletWindowId portletWindowId) {
        final HttpServletRequest request =
                this.portalRequestUtils.getPortletHttpRequest(portletRequest);
        final IPerson person = this.personManager.getPerson(request);

        final IPortletWindow portletWindow =
                this.portletWindowRegistry.getPortletWindow(request, portletWindowId);

        final IPortletWindowId delegationParentId = portletWindow.getDelegationParentId();
        if (delegationParentId == null) {
            throw new IllegalArgumentException(
                    "Portlet window '"
                            + portletWindow
                            + "' is not a delegate window and cannot be delgated to.");
        }

        return new PortletDelegationDispatcherImpl(
                portletWindow,
                person.getID(),
                this.portalRequestUtils,
                this.personManager,
                this.portletRenderer,
                this.portalUrlProvider,
                this.portletDelegationManager);
    }
}