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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.hotkey;

import java.io.IOException;
import java.util.Map;

import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.event.ActionEvent;

import org.primefaces.context.RequestContext;
import org.primefaces.renderkit.CoreRenderer;
import org.primefaces.util.AjaxRequestBuilder;
import org.primefaces.util.ComponentUtils;

public class HotkeyRenderer extends CoreRenderer {

    @Override
	public void decode(FacesContext facesContext, UIComponent component) {
		Map params = facesContext.getExternalContext().getRequestParameterMap();
		Hotkey hotkey = (Hotkey) component;

		if(params.containsKey(hotkey.getClientId(facesContext))) {
			hotkey.queueEvent(new ActionEvent(hotkey));
		}
	}

    @Override
	public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
		ResponseWriter writer = context.getResponseWriter();
		Hotkey hotkey = (Hotkey) component;
		String clientId = hotkey.getClientId(context);
        
		writer.startElement("script", null);
		writer.writeAttribute("type", "text/javascript", null);

        writer.write("$(function() {");
		writer.write("$(document).bind('keydown', '" + hotkey.getBind() + "', function(){");
	
		if(hotkey.isAjaxified()) {
			UIComponent form = ComponentUtils.findParentForm(context,hotkey);

			if(form == null) {
				throw new FacesException("Hotkey '"+ clientId+ "' needs to be enclosed in a form when ajax mode is enabled");
			}
            
            AjaxRequestBuilder builder = RequestContext.getCurrentInstance().getAjaxRequestBuilder();
        
            String request = builder.init()
            	.source(clientId)
                .form(form.getClientId(context))
                .process(component, hotkey.getProcess())
                .update(component, hotkey.getUpdate())
                .async(hotkey.isAsync())
                .global(hotkey.isGlobal())
                .delay(hotkey.getDelay())
                .partialSubmit(hotkey.isPartialSubmit(), hotkey.isPartialSubmitSet())
                .resetValues(hotkey.isResetValues(), hotkey.isResetValuesSet())
                .ignoreAutoUpdate(hotkey.isIgnoreAutoUpdate())
                .onstart(hotkey.getOnstart())
                .onerror(hotkey.getOnerror())
                .onsuccess(hotkey.getOnsuccess())
                .oncomplete(hotkey.getOncomplete())
                .params(hotkey)
                .build();
			
			writer.write(request);

		} else {
			writer.write(hotkey.getHandler());
		}

		writer.write(";return false;});});");
        
		writer.endElement("script");
	}
}