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/*
 * Copyright 2009-2014 PrimeTek.
 *
 * 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.primefaces.component.toolbar;

import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import org.primefaces.component.separator.UISeparator;
import org.primefaces.renderkit.CoreRenderer;

public class ToolbarRenderer extends CoreRenderer {

    private final static Logger logger = Logger.getLogger(ToolbarRenderer.class.getName());
    
    @Override
    public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
        Toolbar toolbar = (Toolbar) component;
        ResponseWriter writer = context.getResponseWriter();
        String style = toolbar.getStyle();
        String styleClass = toolbar.getStyleClass();
        styleClass = styleClass == null ? Toolbar.CONTAINER_CLASS : Toolbar.CONTAINER_CLASS + " " + styleClass;

        writer.startElement("div", toolbar);
        writer.writeAttribute("id", toolbar.getClientId(context), null);
        writer.writeAttribute("class", styleClass, null);
        if(style != null) {
            writer.writeAttribute("style", style, null);
        }
        
        if(toolbar.getChildCount() > 0) {
            logger.log(Level.WARNING, "ToolbarGroup is deprecated, use \"left\" and \"right\" facets to define groups instead.");
            encodeCompatibleMode(context, toolbar);
        }
        else {
            encodeFacet(context, toolbar, "left");
            encodeFacet(context, toolbar, "right");
        }

        writer.endElement("div");
    }
    
    protected void encodeCompatibleMode(FacesContext context, Toolbar toolbar) throws IOException {
        ResponseWriter writer = context.getResponseWriter();
        
        for(UIComponent child : toolbar.getChildren()) {
            if(child.isRendered() && child instanceof ToolbarGroup) {
                ToolbarGroup group = (ToolbarGroup) child;

                String defaultGroupClass = "ui-toolbar-group-" + group.getAlign();
                String groupClass = group.getStyleClass();
                String groupStyle = group.getStyle();
                groupClass = groupClass == null ? defaultGroupClass : defaultGroupClass + " " + groupClass;

                writer.startElement("div", null);
                writer.writeAttribute("class", groupClass, null);
                if(groupStyle != null) {
                    writer.writeAttribute("style", groupStyle, null);
                }

                for(UIComponent groupChild : group.getChildren()) {
                    if(groupChild instanceof UISeparator && groupChild.isRendered())
                        encodeSeparator(context, (UISeparator) groupChild);
                    else
                        groupChild.encodeAll(context);
                }

                writer.endElement("div");
            }
        }
    }
    
    protected void encodeFacet(FacesContext context, Toolbar toolbar, String facetName) throws IOException {
        ResponseWriter writer = context.getResponseWriter();
        UIComponent facet = toolbar.getFacet(facetName);
        
        if(facet != null) {
            writer.startElement("div", null);
            writer.writeAttribute("class", "ui-toolbar-group-" + facetName, null);
            facet.encodeAll(context);
            writer.endElement("div");
        }
    }
        
    public void encodeSeparator(FacesContext context, UISeparator separator) throws IOException {
        ResponseWriter writer = context.getResponseWriter();
        String style = separator.getStyle();
        String styleClass = separator.getStyleClass();
        styleClass = styleClass == null ? Toolbar.SEPARATOR_CLASS : Toolbar.SEPARATOR_CLASS + " " + styleClass;

        writer.startElement("span", null);
        writer.writeAttribute("class", styleClass, null);
        if(style != null) {
            writer.writeAttribute("style", style, null);
        }

        writer.startElement("span", null);
        writer.writeAttribute("class", Toolbar.SEPARATOR_ICON_CLASS, null);
        writer.endElement("span");
        
        writer.endElement("span");
    }

    @Override
    public void encodeChildren(FacesContext facesContext, UIComponent component) throws IOException {
		//Do nothing
	}

    @Override
	public boolean getRendersChildren() {
		return true;
	}
}