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//
// Copyright 2010 GOT5 (GO Tapestry 5)
//
// 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.got5.tapestry5.jquery.components;

import org.apache.commons.lang3.StringUtils;
import org.apache.tapestry5.*;
import org.apache.tapestry5.annotations.Parameter;
import org.apache.tapestry5.annotations.Property;
import org.apache.tapestry5.annotations.SupportsInformalParameters;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.apache.tapestry5.ioc.internal.util.TapestryException;
import org.apache.tapestry5.services.ClientBehaviorSupport;
import org.apache.tapestry5.services.PageRenderLinkSource;
import org.apache.tapestry5.services.javascript.JavaScriptSupport;

/**
 * @since 2.1.1
 *
 * @tapestrydoc
 */
@SupportsInformalParameters
public class CarouselItem implements ClientElement {

    @Property
    @Parameter(value = "75", defaultPrefix = BindingConstants.LITERAL)
    private int width;

    @Property
    @Parameter(value = "75", defaultPrefix = BindingConstants.LITERAL)
    private int height;

    @Property
    @Parameter(defaultPrefix = BindingConstants.PROP)
    private String imageSource;

    @Property
    @Parameter(defaultPrefix = BindingConstants.LITERAL)
    private String page;

    @Property
    @Parameter(defaultPrefix = BindingConstants.LITERAL)
    private String event;

    @Property
    @Parameter(allowNull = true, defaultPrefix = BindingConstants.PROP)
    private Object context;

	@Property
	@Parameter(defaultPrefix=BindingConstants.LITERAL)
	private String zone;

    @Parameter("this")
    private PropertyOverrides overrides;

    @Inject
	private org.apache.tapestry5.ComponentResources componentResources;

	@Inject
	private JavaScriptSupport javaScriptSupport;

	@Inject
	private PageRenderLinkSource pageRenderLink;

    private String clientId;

	private boolean isPageLink;

	private boolean isEventLink;

    private Link url;

    private Block override;

    @Inject
    private ClientBehaviorSupport clientSupport;

	public boolean isPagelink(){
		return StringUtils.isNotEmpty(page);
	}

	public boolean isEventlink(){
        StringUtils StringUtils;
        return org.apache.commons.lang3.StringUtils.isNotEmpty(event);
	}

	

	void setupRender() {


        override = overrides.getOverrideBlock("item");

        if(override == null && !componentResources.isBound("imageSource")){
            throw new TapestryException("The imageSource parameter is not bound! ", this, null);
        }

	    this.clientId = javaScriptSupport.allocateClientId(componentResources);

	    this.isPageLink = StringUtils.isNotEmpty(page);
  	    this.isEventLink = StringUtils.isNotEmpty(event);

        this.url = null;

	    if (isPageLink) {

            if (context != null) {
                url = pageRenderLink.createPageRenderLinkWithContext(page, context);
            } else {
                url = pageRenderLink.createPageRenderLinkWithContext(page);
            }

	    } else if (isEventLink) {

            if (context != null) {
                url = componentResources.createEventLink(event, context);
            } else {
                url = componentResources.createEventLink(event);
            }
	    }
	}

    Renderable defaultBlock = new Renderable() {
        public void render(MarkupWriter writer) {
            if (isPageLink) {

                writer.element("a", "href", url.toURI());

            } else if (isEventLink) {

                writer.element("a", "href", url.toURI(), "id", clientId);

                if (zone != null) writer.attributes("data-update-zone", zone);
            }

            writer.element("img", "src", imageSource, "height", height + "px", "width", width + "px");
            componentResources.renderInformalParameters(writer);
            writer.end();
        }
    };
	Object beginRender(MarkupWriter w) {

	    w.element("li");

        return override != null ? override : defaultBlock;
	}

	void afterRender(MarkupWriter writer) {

        if (isPageLink || isEventLink) {
            writer.end();
        }

	    writer.end();
    }

    public String getClientId() {

        return this.clientId;
    }

}