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 * 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.maven.tools.plugin.extractor.ant;

import java.io.File;
import java.net.URISyntaxException;
import java.net.URL;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.maven.plugin.descriptor.InvalidPluginDescriptorException;
import org.apache.maven.plugin.descriptor.MojoDescriptor;
import org.apache.maven.plugin.descriptor.Parameter;
import org.apache.maven.plugin.descriptor.PluginDescriptor;
import org.apache.maven.project.MavenProject;
import org.apache.maven.project.path.PathTranslator;
import org.apache.maven.tools.plugin.DefaultPluginToolsRequest;
import org.apache.maven.tools.plugin.PluginToolsRequest;
import org.apache.maven.tools.plugin.extractor.ExtractionException;
import org.codehaus.plexus.component.repository.ComponentRequirement;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

// at least one test class must be public for test-javadoc report
public class AntMojoDescriptorExtractorTest {

    @Test
    void testBasicMojoExtraction_CheckInjectedParametersAndRequirements()
            throws InvalidPluginDescriptorException, ExtractionException {
        Map<String, Set<File>> scriptMap = buildTestMap("basic");

        PluginDescriptor pd = new PluginDescriptor();

        pd.setArtifactId("test-plugin");
        pd.setGroupId("org.mytest");
        pd.setVersion("1");
        pd.setGoalPrefix("mytest");

        PluginToolsRequest request = new DefaultPluginToolsRequest(new MavenProject(), pd);

        List<MojoDescriptor> metadata =
                new AntMojoDescriptorExtractor().extractMojoDescriptorsFromMetadata(scriptMap, request);

        assertEquals(2, metadata.size());

        for (MojoDescriptor desc : metadata) {
            if ("test".equals(desc.getGoal())) {
                assertFalse(desc.getImplementation().contains(":"));
            } else if ("test2".equals(desc.getGoal())) {
                assertTrue(desc.getImplementation().endsWith(":test2"));
            }

            List<Parameter> params = desc.getParameters();
            Map<String, Parameter> paramMap = new HashMap<>();
            for (Parameter param : params) {
                paramMap.put(param.getName(), param);
            }

            assertNotNull(
                    paramMap.get("basedir"), "Mojo descriptor: " + desc.getGoal() + " is missing 'basedir' parameter.");
            assertNotNull(
                    paramMap.get("messageLevel"),
                    "Mojo descriptor: " + desc.getGoal() + " is missing 'messageLevel' parameter.");
            assertNotNull(
                    paramMap.get("project"), "Mojo descriptor: " + desc.getGoal() + " is missing 'project' parameter.");
            assertNotNull(
                    paramMap.get("session"), "Mojo descriptor: " + desc.getGoal() + " is missing 'session' parameter.");
            assertNotNull(
                    paramMap.get("mojoExecution"),
                    "Mojo descriptor: " + desc.getGoal() + " is missing 'mojoExecution' parameter.");

            List<ComponentRequirement> components = desc.getRequirements();

            assertNotNull(components);
            assertEquals(1, components.size());

            ComponentRequirement req = components.get(0);
            assertEquals(
                    PathTranslator.class.getName(),
                    req.getRole(),
                    "Mojo descriptor: " + desc.getGoal() + " is missing 'PathTranslator' component requirement.");
        }
    }

    private Map<String, Set<File>> buildTestMap(String resourceDirName) {
        try {
            Map<String, Set<File>> result = new HashMap<>();
            ClassLoader cloader = Thread.currentThread().getContextClassLoader();
            URL mojosXmlUrl = cloader.getResource(resourceDirName + "/test.mojos.xml");

            assertNotNull(
                    mojosXmlUrl,
                    "No classpath resource named: '" + resourceDirName + "/test.mojos.xml' could be found.");

            File mojosXml = Paths.get(mojosXmlUrl.toURI()).toFile();
            File dir = mojosXml.getParentFile();

            Set<File> scripts = new HashSet<>();
            String[] listing = dir.list();
            for (int i = 0; listing != null && i < listing.length; i++) {
                if (listing[i].endsWith(".mojos.xml")) {
                    File f = new File(dir, listing[i]).getAbsoluteFile();

                    scripts.add(f);
                }
            }

            result.put(dir.getAbsolutePath(), scripts);

            return result;
        } catch (final URISyntaxException e) {
            throw new AssertionError(e);
        }
    }

    // TODO

}
