/*
 * 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.struts2.views.freemarker;

import org.apache.struts2.util.fs.DefaultFileManagerFactory;
import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.Version;
import org.apache.commons.io.FileUtils;
import org.apache.struts2.StrutsInternalTestCase;
import org.apache.struts2.views.jsp.StrutsMockServletContext;

import jakarta.servlet.ServletContext;
import java.io.StringWriter;
import java.io.Writer;
import java.util.HashMap;
import java.util.Map;

/**
 * Test case for FreemarkerManager
 */
public class FreemarkerManagerTest extends StrutsInternalTestCase {

    public void testIfStrutsEncodingIsSetProperty() throws Exception {
        FreemarkerManager mgr = new FreemarkerManager();
        mgr.setEncoding("UTF-8");
        DefaultFileManagerFactory factory = new DefaultFileManagerFactory();
        container.inject(factory);
        mgr.setFileManagerFactory(factory);
        mgr.setThemeTemplateLoader(new FreemarkerThemeTemplateLoader());
        StrutsMockServletContext servletContext = new StrutsMockServletContext();
        servletContext.setAttribute(FreemarkerManager.CONFIG_SERVLET_CONTEXT_KEY, null);
        freemarker.template.Configuration conf = mgr.getConfiguration(servletContext);
        assertEquals(conf.getDefaultEncoding(), "UTF-8");
    }

    public void testTemplateLoaderBaseOnFile() throws Exception {
        // given
        DummyFreemarkerManager manager = new DummyFreemarkerManager();
        StrutsMockServletContext servletContext = new StrutsMockServletContext();
        servletContext.setAttribute(FreemarkerManager.CONFIG_SERVLET_CONTEXT_KEY, null);

        String tmpPath = "file://" + FileUtils.getTempDirectoryPath();

        // when
        manager.load(servletContext, tmpPath);

        // then
        assertTrue(true); // should pass
    }

    public void testIncompatibleImprovementsByOverriding() throws Exception {
        // given
        FreemarkerManager manager = new FreemarkerManager() {
            @Override
            protected Version getFreemarkerVersion(ServletContext servletContext) {
                return Configuration.VERSION_2_3_33;
            }
        };
        container.inject(manager);

        // when
        manager.init(servletContext);

        // then
        assertEquals(Configuration.VERSION_2_3_33, manager.config.getIncompatibleImprovements());
    }

    public void testIncompatibleImprovementsWithTemplate() throws Exception {
        // given
        FreemarkerManager manager = new FreemarkerManager();
        container.inject(manager);
        Configuration configuration = manager.getConfiguration(servletContext);
        Template tpl = configuration.getTemplate("org/apache/struts2/views/freemarker/incompatible-improvements.ftl");

        // when
        Writer out = new StringWriter();
        Map<String, String> model = new HashMap<>();
        model.put("error", "It's an error message");

        tpl.process(model, out);

        // then
        assertEquals(Configuration.VERSION_2_3_34, configuration.getIncompatibleImprovements());
        assertEquals("<input type=\"text\" onclick=\"this.alert('It&#39;s an error message')\"/>", out.toString());
    }

    public void testIncompatibleImprovementsByServletContext() throws Exception {
        // given
        servletContext.setInitParameter("freemarker.incompatible_improvements", "2.3.32");
        FreemarkerManager manager = new FreemarkerManager();
        container.inject(manager);

        // when
        manager.init(servletContext);

        // then
        assertEquals(Configuration.VERSION_2_3_32, manager.config.getIncompatibleImprovements());
    }

    public void testWhitespaceStrippingEnabledByDefault() throws Exception {
        // given
        FreemarkerManager manager = new FreemarkerManager();
        container.inject(manager);

        // when
        manager.init(servletContext);

        // then
        assertTrue(manager.config.getWhitespaceStripping());
    }

    public void testWhitespaceStrippingDisabledViaConfiguration() throws Exception {
        // given
        FreemarkerManager manager = new FreemarkerManager();
        container.inject(manager);
        manager.setWhitespaceStripping("false");

        // when
        manager.init(servletContext);

        // then
        assertFalse(manager.config.getWhitespaceStripping());
    }
}

class DummyFreemarkerManager extends FreemarkerManager {

    public void load(StrutsMockServletContext servletContext, String path) {
        createTemplateLoader(servletContext, path);
    }

}
