/*
 * JBoss, Home of Professional Open Source
 * Copyright 2013, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * 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.richfaces.context;

import java.util.Collection;
import java.util.Map;

import javax.faces.component.UIComponent;
import javax.faces.component.visit.VisitCallback;
import javax.faces.component.visit.VisitContext;
import javax.faces.component.visit.VisitContextWrapper;
import javax.faces.component.visit.VisitResult;
import javax.faces.context.FacesContext;

import org.richfaces.component.MetaComponentResolver;
import org.richfaces.util.FastJoiner;

/**
 * @author Nick Belaevski
 */
public abstract class ExtendedVisitContext extends VisitContextWrapper {
    public static final String META_COMPONENT_ID = "org.richfaces.MetaComponentId";
    private static final FastJoiner META_COMPONENT_SEPARATOR_JOINER = FastJoiner
        .on(MetaComponentResolver.META_COMPONENT_SEPARATOR_CHAR);
    private final FacesContext facesContext;
    private final ExtendedVisitContextMode visitMode;

    private final VisitContext wrappedVisitContext;

    @Override
    public VisitContext getWrapped() {
        return wrappedVisitContext;
    }

    protected ExtendedVisitContext(VisitContext visitContextToWrap, FacesContext facesContext, ExtendedVisitContextMode visitMode) {
        super();

        if (facesContext == null) {
            throw new NullPointerException();
        }

        this.facesContext = facesContext;
        this.visitMode = visitMode;
        this.wrappedVisitContext = visitContextToWrap;
    }

    public ExtendedVisitContextMode getVisitMode() {
        return visitMode;
    }

    public VisitResult invokeMetaComponentVisitCallback(UIComponent component, VisitCallback callback, String metaComponentId) {

        if (metaComponentId != null) {
            Map<Object, Object> attributes = getFacesContext().getAttributes();
            try {
                attributes.put(META_COMPONENT_ID, metaComponentId);
                return invokeVisitCallback(component, callback);
            } finally {
                attributes.remove(META_COMPONENT_ID);
            }
        } else {
            return invokeVisitCallback(component, callback);
        }
    }

    public String buildExtendedClientId(UIComponent component) {
        String metaComponentId = (String) facesContext.getAttributes().get(META_COMPONENT_ID);
        return META_COMPONENT_SEPARATOR_JOINER.join(component.getClientId(facesContext), metaComponentId);
    }

    public String buildExtendedComponentId(UIComponent component) {
        String metaComponentId = (String) facesContext.getAttributes().get(META_COMPONENT_ID);
        return META_COMPONENT_SEPARATOR_JOINER.join(component.getId(), metaComponentId);
    }

    @Override
    public FacesContext getFacesContext() {
        return facesContext;
    }

    public abstract Collection<String> getDirectSubtreeIdsToVisit(UIComponent component);

    public abstract VisitContext createNamingContainerVisitContext(UIComponent component, Collection<String> directIds);
}