/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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
 *
 *      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.apache.wicket.examples.csp;

import org.apache.wicket.AttributeModifier;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.markup.html.AjaxLink;
import org.apache.wicket.examples.WicketExamplePage;
import org.apache.wicket.markup.head.CssHeaderItem;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.markup.head.JavaScriptHeaderItem;
import org.apache.wicket.markup.html.WebMarkupContainer;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.Model;
import org.apache.wicket.request.resource.CssResourceReference;
import org.apache.wicket.request.resource.JavaScriptResourceReference;
import org.apache.wicket.request.resource.ResourceReference;

/**
 * Page which disallows execution of inline scripts without nonce
 */
public class NonceDemoPage extends WicketExamplePage
{

    private static final ResourceReference JS_DELAYED =
        new JavaScriptResourceReference(NonceDemoPage.class, "delayedVisible.js");

    private static final ResourceReference CSS_DELAYED =
        new CssResourceReference(NonceDemoPage.class, "delayedVisible.css");

    private final IModel<Integer> clickMeCountModel = Model.of(0);

    public NonceDemoPage()
    {
        super();
        add(new Label("testNonceScript", getString("testNonceScript")));
        add(new Label("testNoNonceScript", getString("testNoNonceScript")));

        final Label clickMeCount = new Label("clickMeCount", clickMeCountModel);
        clickMeCount.setOutputMarkupId(true);
        add(clickMeCount);

        final WebMarkupContainer delayedVisible = new WebMarkupContainer("delayedVisible")
        {
            private static final long serialVersionUID = 1L;

            @Override
            public void renderHead(IHeaderResponse response)
            {
                super.renderHead(response);

                response.render(JavaScriptHeaderItem.forReference(JS_DELAYED));
                response.render(CssHeaderItem.forReference(CSS_DELAYED));
            }
        };
        delayedVisible.setOutputMarkupPlaceholderTag(true);
        delayedVisible.setVisible(false);
        add(delayedVisible);
        
        WebMarkupContainer blacktext = new WebMarkupContainer("blacktext");
        blacktext.setOutputMarkupId(true);
        add(blacktext);

        add(new AjaxLink<String>("clickMe")
        {
            private static final long serialVersionUID = 1L;

            @Override
            public void onClick(AjaxRequestTarget target)
            {
                clickMeCountModel.setObject(clickMeCountModel.getObject() + 1);

                // target.add (works even without unsafe-eval)
                target.add(clickMeCount);

                // append javascript (works even without unsafe-eval)
                target.appendJavaScript(
                    "document.querySelector(\".click-me-text\").innerHTML = \"replaced\";");

                delayedVisible.setVisible(true);
                target.add(delayedVisible);
                
                blacktext.add(AttributeModifier.replace("style", "color: red"));
                target.add(blacktext);
            }
        }.setOutputMarkupId(true));
    }

    @Override
    public void renderHead(IHeaderResponse response)
    {
        super.renderHead(response);
        // Add inline script with nonce
        response.render(JavaScriptHeaderItem.forScript(
            "$(function(){$(\".test-nonce-script\").html(\"Text injected by script with nonce: success\");});",
            "test-nonce-script"));
        // Add inline css with nonce
        response.render(
            CssHeaderItem.forCSS(".injected-style--with-nonce{color: green; font-weight: bold;}",
                "injected-style-with-nonce"));
    }

    @Override
    public void detachModels()
    {
        super.detachModels();
        clickMeCountModel.detach();
    }
}