/*
 * 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.camel.itest.springboot.util;

import java.io.File;
import java.io.FileWriter;
import java.io.InputStream;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.TreeSet;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.camel.itest.springboot.ITestConfig;
import org.apache.camel.itest.springboot.ITestConfigBuilder;
import org.apache.camel.itest.springboot.arquillian.SpringBootZipExporterImpl;
import org.apache.commons.io.IOUtils;
import org.jboss.arquillian.container.se.api.ClassPath;
import org.jboss.arquillian.core.spi.InvocationException;
import org.jboss.shrinkwrap.api.Archive;
import org.jboss.shrinkwrap.api.ArchivePath;
import org.jboss.shrinkwrap.api.Configuration;
import org.jboss.shrinkwrap.api.ConfigurationBuilder;
import org.jboss.shrinkwrap.api.Domain;
import org.jboss.shrinkwrap.api.ExtensionLoader;
import org.jboss.shrinkwrap.api.ShrinkWrap;
import org.jboss.shrinkwrap.api.asset.Asset;
import org.jboss.shrinkwrap.api.asset.ClassLoaderAsset;
import org.jboss.shrinkwrap.api.asset.FileAsset;
import org.jboss.shrinkwrap.api.exporter.ZipExporter;
import org.jboss.shrinkwrap.api.spec.JavaArchive;
import org.jboss.shrinkwrap.impl.base.ServiceExtensionLoader;
import org.jboss.shrinkwrap.impl.base.URLPackageScanner;
import org.jboss.shrinkwrap.impl.base.asset.AssetUtil;
import org.jboss.shrinkwrap.impl.base.path.BasicPath;
import org.jboss.shrinkwrap.resolver.api.maven.ConfigurableMavenResolverSystem;
import org.jboss.shrinkwrap.resolver.api.maven.Maven;
import org.jboss.shrinkwrap.resolver.api.maven.MavenResolvedArtifact;
import org.jboss.shrinkwrap.resolver.api.maven.PomEquippedResolveStage;
import org.jboss.shrinkwrap.resolver.api.maven.ScopeType;
import org.jboss.shrinkwrap.resolver.api.maven.coordinate.MavenCoordinate;
import org.jboss.shrinkwrap.resolver.api.maven.coordinate.MavenCoordinates;
import org.jboss.shrinkwrap.resolver.api.maven.coordinate.MavenDependencies;
import org.jboss.shrinkwrap.resolver.api.maven.coordinate.MavenDependency;
import org.jboss.shrinkwrap.resolver.api.maven.coordinate.MavenDependencyExclusion;

/**
 * Packages a module in a spring-boot compatible nested-jar structure.
 */
public final class ArquillianPackager {

    /**
     * A flag to enable system-out logging.
     * Cannot use logging libraries here.
     */
    private static final boolean DEBUG_ENABLED = false;

    /**
     * Configuration of the library checker.
     */
    private static final boolean FAIL_ON_TEST_LIBRARY_MISMATCH = false;
    private static final boolean FAIL_ON_RELATED_LIBRARY_MISMATCH = true;
    private static final boolean VERSION_EQUALITY_MINOR_VERSION = true;

    /**
     * Spring-boot 1.4+ packaging model
     */
    private static final String LIB_FOLDER = "/BOOT-INF/lib";
    private static final String CLASSES_FOLDER = "BOOT-INF/classes";

    private static final Pattern PROP_PATTERN = Pattern.compile("(\\$\\{[^}]*\\})");

    private ArquillianPackager() {
    }

    public static Archive<?> springBootPackage(ITestConfig config) throws Exception {
        if (!new File(".").getCanonicalFile().getName().equals("camel-itest-spring-boot")) {
            throw new IllegalStateException("In order to run the integration tests, 'camel-itest-spring-boot' must be the working directory. Check your configuration.");
        }

        ExtensionLoader extensionLoader = new ServiceExtensionLoader(Collections.singleton(getExtensionClassloader()));
        extensionLoader.addOverride(ZipExporter.class, SpringBootZipExporterImpl.class);
        ConfigurationBuilder builder = new ConfigurationBuilder().extensionLoader(extensionLoader);
        Configuration conf = builder.build();

        Domain domain = ShrinkWrap.createDomain(conf);

        JavaArchive ark = domain.getArchiveFactory().create(JavaArchive.class, "test.jar");


        ark = ark.addAsManifestResource("BOOT-MANIFEST.MF", "MANIFEST.MF");

        ark = ark.addAsDirectories(LIB_FOLDER);
        if (!CLASSES_FOLDER.equals("")) {
            ark = ark.addAsDirectories(CLASSES_FOLDER);
        }

        if (config.getUseCustomLog()) {
            ark = ark.addAsResource("spring-logback.xml", CLASSES_FOLDER + "/spring-logback.xml");
        }

        for (Map.Entry<String, String> res : config.getResources().entrySet()) {
            ark = ark.addAsResource(res.getKey(), CLASSES_FOLDER + "/" + res.getValue());
        }

        String version = System.getProperty("version_org.apache.camel:camel-core");
        if (version == null) {
            config.getMavenVersion();
        }
        if (version == null) {
            // It is missing when launching from IDE
            PomEquippedResolveStage pom = resolver(config).loadPomFromFile("pom.xml");
            List<MavenResolvedArtifact> resolved = Arrays.asList(pom.importCompileAndRuntimeDependencies().resolve().withoutTransitivity().asResolvedArtifact());
            for (MavenResolvedArtifact dep : resolved) {
                if (dep.getCoordinate().getGroupId().equals("org.apache.camel.springboot")) {
                    version = dep.getCoordinate().getVersion();
                    break;
                }
            }
        }

        debug("Resolved version: " + version);
        if (version == null) {
            throw new IllegalStateException("Cannot determine the current version of the camel component");
        }

        List<MavenDependencyExclusion> commonExclusions = new LinkedList<>();
        commonExclusions.add(MavenDependencies.createExclusion("commons-logging", "commons-logging"));
        commonExclusions.add(MavenDependencies.createExclusion("org.slf4j", "slf4j-log4j12"));
        commonExclusions.add(MavenDependencies.createExclusion("log4j", "log4j"));
        commonExclusions.add(MavenDependencies.createExclusion("log4j", "log4j-slf4j-impl"));
        commonExclusions.add(MavenDependencies.createExclusion("org.apache.logging.log4j", "log4j"));
        commonExclusions.add(MavenDependencies.createExclusion("org.apache.logging.log4j", "log4j-core"));
        commonExclusions.add(MavenDependencies.createExclusion("org.apache.logging.log4j", "log4j-slf4j-impl"));
        commonExclusions.add(MavenDependencies.createExclusion("log4j", "apache-log4j-extras"));
        commonExclusions.add(MavenDependencies.createExclusion("org.slf4j", "slf4j-simple"));
        commonExclusions.add(MavenDependencies.createExclusion("org.slf4j", "slf4j-jdk14"));
        commonExclusions.add(MavenDependencies.createExclusion("ch.qos.logback", "logback-classic"));
        commonExclusions.add(MavenDependencies.createExclusion("ch.qos.logback", "logback-core"));

        for (String ex : config.getMavenExclusions()) {
            commonExclusions.add(MavenDependencies.createExclusion(ex));
        }


        // Module dependencies
        List<MavenDependency> additionalDependencies = new LinkedList<>();
        for (String canonicalForm : config.getAdditionalDependencies()) {
            MavenCoordinate coord = MavenCoordinates.createCoordinate(canonicalForm);
            MavenDependency dep = MavenDependencies.createDependency(coord, ScopeType.RUNTIME, false);
            additionalDependencies.add(dep);
        }

//        String mainArtifactId = config.getModuleName() + "-starter";
//        MavenCoordinate mainJar = MavenCoordinates.createCoordinate(config.getMavenGroup(), mainArtifactId, version, PackagingType.JAR, null);
//        // Add exclusions only when not using the starters
//        MavenDependency mainDep = MavenDependencies.createDependency(mainJar, ScopeType.COMPILE, false);
//        moduleDependencies.add(mainDep);


        List<String> testProvidedDependenciesXml = new LinkedList<>();
        List<ScopeType> scopes = new LinkedList<>();
        if (config.getIncludeProvidedDependencies() || config.getIncludeTestDependencies() || config.getUnitTestEnabled()) {

            if (config.getIncludeTestDependencies() || config.getUnitTestEnabled()) {
                testProvidedDependenciesXml.addAll(DependencyResolver.getDependencies(config.getModuleBasePath() + "/pom.xml", ScopeType.TEST.toString()));
                scopes.add(ScopeType.TEST);
            }
            if (config.getIncludeProvidedDependencies()) {
                testProvidedDependenciesXml.addAll(DependencyResolver.getDependencies(config.getModuleBasePath() + "/pom.xml", ScopeType.PROVIDED.toString()));
                scopes.add(ScopeType.PROVIDED);
            }

        }

        List<String> cleanTestProvidedDependenciesXml = new LinkedList<>();
        for (String depXml : testProvidedDependenciesXml) {
            if (validTestDependency(config, depXml, commonExclusions)) {
                depXml = useBOMVersionIfPresent(config, depXml);
                depXml = enforceExclusions(config, depXml, commonExclusions);
                depXml = switchToStarterIfPresent(config, depXml);
                cleanTestProvidedDependenciesXml.add(depXml);
            }
        }

//        List<MavenResolvedArtifact> testDependencies = new LinkedList<>();
//        if (!cleanTestProvidedDependenciesXml.isEmpty()) {
//
//            File testProvidedResolverPom = createResolverPom(config, cleanTestProvidedDependenciesXml);
//
//            testDependencies.addAll(Arrays.asList(resolver(config)
//                    .loadPomFromFile(testProvidedResolverPom)
//                    .importDependencies(scopes.toArray(new ScopeType[0]))
//                    .resolve()
//                    .withTransitivity()
//                    .asResolvedArtifact()));
//        }

        File moduleSpringBootPom = createUserPom(config, cleanTestProvidedDependenciesXml);

        List<ScopeType> resolvedScopes = new LinkedList<>();
        resolvedScopes.add(ScopeType.COMPILE);
        resolvedScopes.add(ScopeType.RUNTIME);
        resolvedScopes.addAll(scopes);

        List<MavenResolvedArtifact> runtimeDependencies = new LinkedList<>();
        try {
            runtimeDependencies.addAll(Arrays.asList(resolver(config)
                    .loadPomFromFile(moduleSpringBootPom)
                    .importDependencies(resolvedScopes.toArray(new ScopeType[0]))
                    .addDependencies(additionalDependencies)
                    .resolve()
                    .withTransitivity()
                    .asResolvedArtifact()));
        } catch (Exception e) {
            throw new IllegalArgumentException(e.getMessage(), e);
        }


        List<MavenResolvedArtifact> dependencyArtifacts = runtimeDependencies; //merge(config, runtimeDependencies, testDependencies);
        lookForVersionMismatch(config, dependencyArtifacts);

        List<File> dependencies = new LinkedList<>();
        for (MavenResolvedArtifact a : dependencyArtifacts) {
            dependencies.add(a.asFile());
        }

        // The spring boot-loader dependency will be added to the main jar, so it should be excluded from the embedded ones
        excludeDependencyRegex(dependencies, "^spring-boot-loader-[0-9].*");

        // Add all dependencies as spring-boot nested jars
        ark = addDependencies(ark, dependencies);

        // Add common packages to main jar
        ark = ark.addPackages(true, "org.jboss.shrinkwrap");

        // Add current classes to both location to be used by different classloaders
        ark = ark.addPackages(true, "org.apache.camel.itest.springboot");
        ark = addSpringbootPackage(ark, "org.apache.camel.itest.springboot");

        // CAMEL-10060 is resolved since 2.18 but some unit tests use custom (non spring-boot enabled) camel contexts
        ark = ark.addPackages(true, "org.apache.camel.converter.myconverter");

        ark = ark.addPackages(true, "org.springframework.boot.loader");

        ClassPath.Builder external = ClassPath.builder().add(ark);

        // overcome limitations of some JDKs
        external.addSystemProperty("javax.xml.accessExternalDTD", "all");
        external.addSystemProperty("javax.xml.accessExternalSchema", "all");

        if (config.getUnitTestEnabled()) {
            external.addSystemProperty("container.user.dir", new File(config.getModuleBasePath()).getCanonicalPath());
            external.addSystemProperty("container.test.resources.dir", new File(config.getModuleBasePath()).getCanonicalPath() + "/target/test-classes");
        }

        // Adding configuration properties
        for (Map.Entry<Object, Object> e : System.getProperties().entrySet()) {
            if (e.getKey() instanceof String && e.getValue() instanceof String) {
                String key = (String) e.getKey();
                if (key.startsWith(ITestConfigBuilder.CONFIG_PREFIX)) {
                    external.addSystemProperty(key, (String) e.getValue());
                }
            }
        }

        for (Map.Entry<String, String> e : config.getSystemProperties().entrySet()) {
            external.addSystemProperty(e.getKey(), e.getValue());
        }

        return external.build();
    }

    private static void lookForVersionMismatch(ITestConfig config, List<MavenResolvedArtifact> dependencyArtifacts) {

        Set<String> ignore = new HashSet<>();
        ignore.addAll(config.getIgnoreLibraryMismatch());

        // A list of known libraries that don't follow the all-artifacts-same-version convention
        ignore.add("com.atlassian.jira:jira-rest-java-client-api");
        ignore.add("com.fasterxml.jackson.module:jackson-module-scala_2.11"); // latest version not available
        ignore.add("com.github.jnr");
        ignore.add("com.sun.xml.bind:jaxb-xjc");
        ignore.add("commons-beanutils:commons-beanutils");
        ignore.add("io.dropwizard.metrics:metrics-json"); // PR to spring-boot
        ignore.add("io.dropwizard.metrics:metrics-jvm"); // PR to spring-boot
        ignore.add("io.fabric8:kubernetes-");
        ignore.add("io.netty:netty:jar"); // an old version
        ignore.add("io.netty:netty-tcnative-boringssl-static");
        ignore.add("io.swagger:swagger-parser");
        ignore.add("io.opencensus:opencensus-");
        ignore.add("io.opentracing.contrib:opentracing-");
        ignore.add("org.apache.commons");
        ignore.add("org.apache.curator");
        ignore.add("org.apache.cxf:cxf-api");
        ignore.add("org.apache.geronimo.specs");
        ignore.add("org.apache.flink:flink-shaded-asm");
        ignore.add("org.apache.flink:flink-shaded-guava");
        ignore.add("org.apache.flink:flink-shaded-jackson");
        ignore.add("org.apache.flink:flink-shaded-netty");
        ignore.add("org.apache.logging.log4j:log4j-jcl");
        ignore.add("org.apache.maven");
        ignore.add("org.apache.parquet");
        ignore.add("org.apache.solr:solr-solrj"); // PR to spring-boot
        ignore.add("org.apache.velocity");
        ignore.add("org.apache.qpid:qpid-jms-client");
        ignore.add("org.opensaml");
        ignore.add("org.ow2.asm"); // No problem
        ignore.add("org.codehaus.plexus");
        ignore.add("org.eclipse.jetty.websocket:websocket-api"); // PR to spring-boot
        ignore.add("org.jboss.arquillian.container");
        ignore.add("org.jboss:");
        ignore.add("org.hibernate:hibernate-validator"); // does not match with hibernate-core
        ignore.add("org.mortbay.jetty:servlet-api-2.5");
        ignore.add("org.scala-lang:scala-compiler");
        ignore.add("org.slf4j:slf4j-ext"); // PR to spring-boot
        ignore.add("org.easytesting");
        ignore.add("net.java.dev.jna:jna-platform"); // PR to spring-boot
        ignore.add("net.openhft");
        ignore.add("org.scala-lang.modules:scala-java8-compat_2.11");
        ignore.add("net.sourceforge.htmlunit:htmlunit-core-js"); // v 2.21 does not exist
        ignore.add("org.springframework.cloud"); // too many different versions
        ignore.add("org.springframework.data");
        ignore.add("org.springframework.security:spring-security-jwt");
        ignore.add("org.springframework.security:spring-security-rsa");
        ignore.add("org.springframework.social");
        ignore.add("org.webjars"); // No problem
        ignore.add("stax:stax-api");
        ignore.add("xml-apis:xml-apis-ext");
        ignore.add("org.jboss.logging");
        ignore.add("org.jboss.marshalling");
        ignore.add("org.jgroups:jgroups-raft");
        ignore.add("net.sourceforge.htmlunit:htmlunit");


        Map<String, Map<String, String>> status = new TreeMap<>();
        Set<String> mismatches = new TreeSet<>();
        for (MavenResolvedArtifact a : dependencyArtifacts) {
            boolean ignoreCheck = false;
            for (String i : ignore) {
                if (getIdentifier(a).startsWith(i)) {
                    ignoreCheck = true;
                    break;
                }
            }
            if (ignoreCheck) {
                continue;
            }

            String group = a.getCoordinate().getGroupId();
            String artifact = a.getCoordinate().getArtifactId();
            String version = a.getCoordinate().getVersion();

            String artifactPrefix = artifact;
            if (artifactPrefix.contains("-")) {
                artifactPrefix = artifactPrefix.substring(0, artifactPrefix.indexOf("-"));
            }
            String prefixId = group + ":" + artifactPrefix;

            if (!status.containsKey(prefixId)) {
                status.put(prefixId, new TreeMap<>());
            }

            for (String anotherVersion : status.get(prefixId).values()) {
                if (!sameVersion(anotherVersion, version)) {
                    mismatches.add(prefixId);
                }
            }

            status.get(prefixId).put(getIdentifier(a), version);
        }

        StringBuilder message = new StringBuilder();
        for (String mismatch : mismatches) {
            message.append("Found mismatch for dependency " + mismatch + ":\n");
            for (String art : status.get(mismatch).keySet()) {
                String ver = status.get(mismatch).get(art);
                message.append(" - " + art + " --> " + ver + "\n");
            }
        }

        if (message.length() > 0) {
            String alert = "Library version mismatch found.\n" + message;
            if (FAIL_ON_RELATED_LIBRARY_MISMATCH) {
                throw new InvocationException(new RuntimeException(alert));
            } else {
                debug(alert);
            }
        }
    }

    private static boolean sameVersion(String v1, String v2) {
        if (VERSION_EQUALITY_MINOR_VERSION) {
            if (v1.indexOf(".") != v1.lastIndexOf(".") && v2.indexOf(".") != v2.lastIndexOf(".")) {
                // truncate up to minor version
                int v1MinSplit = v1.indexOf(".", v1.indexOf(".") + 1);
                v1 = v1.substring(0, v1MinSplit);

                int v2MinSplit = v2.indexOf(".", v2.indexOf(".") + 1);
                v2 = v2.substring(0, v2MinSplit);
            }
        }

        return v1.equals(v2);
    }

    private static List<MavenResolvedArtifact> merge(ITestConfig config, List<MavenResolvedArtifact> runtimeDependencies, List<MavenResolvedArtifact> testDependencies) {


        Set<String> runtimeArtifacts = new HashSet<>();
        for (MavenResolvedArtifact a : runtimeDependencies) {
            runtimeArtifacts.add(getIdentifier(a));
        }

        Map<String, String> testVersions = new HashMap<>();
        for (MavenResolvedArtifact a : testDependencies) {
            testVersions.put(getIdentifier(a), a.getCoordinate().getVersion());
        }

        List<MavenResolvedArtifact> result = new LinkedList<>();
        List<String> problems = new LinkedList<>();

        for (MavenResolvedArtifact a : runtimeDependencies) {
            String version = a.getCoordinate().getVersion();
            String testVersion = testVersions.get(getIdentifier(a));

            if (testVersion != null && !sameVersion(testVersion, version)) {
                problems.add("Versions for artifact " + getIdentifier(a) + " are different between runtime (" + version + ") and test (" + testVersion + ") scopes");
            }

            result.add(a);
        }

        for (MavenResolvedArtifact a : testDependencies) {
            if (!runtimeArtifacts.contains(getIdentifier(a))) {
                result.add(a);
            }
        }

        if (!problems.isEmpty()) {
            StringBuilder message = new StringBuilder();
            message.append("Some problems found while merging test dependencies:\n");
            for (String problem : problems) {
                message.append(" - " + problem + "\n");
            }

            if (FAIL_ON_TEST_LIBRARY_MISMATCH) {
                throw new InvocationException(new RuntimeException(message.toString()));
            } else {
                debug(message.toString());
            }
        }

        return result;
    }

    private static String getIdentifier(MavenResolvedArtifact a) {
        return a.getCoordinate().getGroupId() + ":" + a.getCoordinate().getArtifactId() + ":" + a.getCoordinate().getType() + ":" + a.getCoordinate().getClassifier();
    }


    private static File createUserPom(ITestConfig config, List<String> cleanTestProvidedDependencies) throws Exception {

        String pom;
        String template = "/application-pom-sb" + config.getSpringBootMajorVersion() + ".xml";
        try (InputStream pomTemplate = ArquillianPackager.class.getResourceAsStream(template)) {
            pom = IOUtils.toString(pomTemplate);
        }

        StringBuilder dependencies = new StringBuilder();
        for (String dep : cleanTestProvidedDependencies) {
            dependencies.append(dep);
            dependencies.append("\n");
        }

        pom = pom.replace("<!-- DEPENDENCIES -->", dependencies.toString());

        Map<String, String> resolvedProperties = new TreeMap<>();
        Matcher m = PROP_PATTERN.matcher(pom);
        while (m.find()) {
            String property = m.group();
            String resolved = DependencyResolver.resolveModuleOrParentProperty(new File(new File(config.getModuleBasePath()), "pom.xml"), property);
            resolvedProperties.put(property, resolved);
        }

        for (String property : resolvedProperties.keySet()) {
            pom = pom.replace(property, resolvedProperties.get(property));
        }

        pom = pom.replace("#{module}", config.getModuleName());

        File pomFile = new File(config.getModuleBasePath() + "/target/itest-spring-boot-pom.xml");
        pomFile.getParentFile().mkdirs();
        try (FileWriter fw = new FileWriter(pomFile)) {
            IOUtils.write(pom, fw);
        }

        return pomFile;
    }


    private static ConfigurableMavenResolverSystem resolver(ITestConfig config) {
        return Maven.configureResolver().workOffline(config.getMavenOfflineResolution());
    }

    private static ClassLoader getExtensionClassloader() {
        ClassLoader cl = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
            @Override
            public ClassLoader run() {
                return Thread.currentThread().getContextClassLoader();
            }
        });
        if (cl == null) {
            cl = ClassLoader.getSystemClassLoader();
        }

        return cl;
    }

    private static boolean validTestDependency(ITestConfig config, String dependencyXml, List<MavenDependencyExclusion> exclusions) {

        boolean valid = true;
        for (MavenDependencyExclusion excl : exclusions) {
            String groupId = excl.getGroupId();
            String artifactId = excl.getArtifactId();

            boolean notExclusion = dependencyXml.indexOf("<exclusions>") < 0 || dependencyXml.indexOf(groupId) < dependencyXml.indexOf("<exclusions>");

            if (dependencyXml.contains(groupId) && dependencyXml.contains(artifactId) && notExclusion) {
                valid = false;
                break;
            }
        }

        if (!valid) {
            debug("Discarded test dependency: " + dependencyXml.replace("\n", "").replace("\r", "").replace("\t", ""));
        }

        return valid;
    }

    private static String enforceExclusions(ITestConfig config, String dependencyXml, List<MavenDependencyExclusion> exclusions) {

        if (!dependencyXml.contains("<exclusions>")) {
            dependencyXml = dependencyXml.replace("</dependency>", "<exclusions></exclusions></dependency>");
        }

        for (MavenDependencyExclusion excl : exclusions) {
            String groupId = excl.getGroupId();
            String artifactId = excl.getArtifactId();

            dependencyXml = dependencyXml.replace("</exclusions>", "<exclusion><groupId>" + groupId + "</groupId><artifactId>" + artifactId + "</artifactId></exclusion></exclusions>");
        }

        return dependencyXml;
    }

    private static String switchToStarterIfPresent(ITestConfig config, String dependencyXml) {

        String groupId = textBetween(dependencyXml, "<groupId>", "</groupId>");
        String artifactId = textBetween(dependencyXml, "<artifactId>", "</artifactId>");
        String type = textBetween(dependencyXml, "<type>", "</type>");

        if ("org.apache.camel".equals(groupId) && artifactId.startsWith("camel-") && !"test-jar".equals(type)) {
            String starterArtifact = artifactId + "-starter";
            File starterFile = new File("../../components-starter/" + starterArtifact);
            if (starterFile.exists()) {
                dependencyXml = dependencyXml.replace(artifactId, starterArtifact);
            }
        }

        return dependencyXml;
    }

    private static String useBOMVersionIfPresent(ITestConfig config, String dependencyXml) {

        String groupId = textBetween(dependencyXml, "<groupId>", "</groupId>");
        String artifactId = textBetween(dependencyXml, "<artifactId>", "</artifactId>");

        String version = config.getTestLibraryVersions().get(groupId + ":" + artifactId);
        boolean stripVersion = false;
        if (version == null) {
            boolean testsLib = dependencyXml.contains("<classifier>tests");
            stripVersion = !testsLib && BOMResolver.getInstance(config).getBOMVersion(groupId, artifactId) != null;
            // skip if its org.infinispan as we need explict version to work-around a problem when using test-jar dependencies
            if ("org.infinispan".equals(groupId)) {
                stripVersion = false;
            }
        }

        if (version != null) {
            if (dependencyXml.contains("<version>")) {
                int from = dependencyXml.indexOf("<version>") + 9;
                int to = dependencyXml.indexOf("</version>");

                dependencyXml = dependencyXml.substring(0, from) + version + dependencyXml.substring(to);
            } else {
                String kw = "</artifactId>";
                int pos = dependencyXml.indexOf(kw) + kw.length();
                dependencyXml = dependencyXml.substring(0, pos) + "<version>" + version + "</version>" + dependencyXml.substring(pos);
            }
        } else if (stripVersion && dependencyXml.contains("<version>")) {
            int from = dependencyXml.indexOf("<version>");
            int to = dependencyXml.indexOf("</version>") + 10;
            dependencyXml = dependencyXml.substring(0, from) + dependencyXml.substring(to);
        }

        return dependencyXml;
    }

    private static String textBetween(String text, String start, String end) {
        int sp = text.indexOf(start);
        int rsp = sp + start.length();
        int ep = text.indexOf(end);
        if (sp < 0 || ep < 0 || ep <= rsp) {
            return null;
        }

        String res = text.substring(rsp, ep);
        return res;
    }

    private static boolean excludeDependencyRegex(List<File> dependencies, String regex) {
        Pattern pattern = Pattern.compile(regex);
        int count = 0;
        for (Iterator<File> it = dependencies.iterator(); it.hasNext();) {
            File f = it.next();
            if (pattern.matcher(f.getName()).matches()) {
                it.remove();
                count++;
                break;
            }
        }
        return count > 0;
    }

    private static JavaArchive addDependencies(JavaArchive ark, Collection<File> deps) {
        Set<File> dependencySet = new HashSet<>(deps);
        for (File d : dependencySet) {
            debug("Adding spring-boot dependency: " + d.getName());
            ark = ark.add(new FileAsset(d), LIB_FOLDER + "/" + d.getName());
        }

        return ark;
    }

    private static JavaArchive addSpringbootPackage(JavaArchive ark, String... packageNames) throws Exception {

        Iterable<ClassLoader> classLoaders = Collections.singleton(Thread.currentThread().getContextClassLoader());

        for (String packageName : packageNames) {
            for (final ClassLoader classLoader : classLoaders) {

                final URLPackageScanner.Callback callback = new URLPackageScanner.Callback() {
                    @Override
                    public void classFound(String className, Asset asset) {
                        ArchivePath classNamePath = AssetUtil.getFullPathForClassResource(className);

                        asset = new ClassLoaderAsset(classNamePath.get().substring(1), classLoader);
                        ArchivePath location = new BasicPath(CLASSES_FOLDER + "/", classNamePath);
                        ark.add(asset, location);
                    }
                };
                final URLPackageScanner scanner = URLPackageScanner.newInstance(true, classLoader, callback, packageName);
                scanner.scanPackage();
            }
        }

        return ark;
    }


    private static void debug(String str) {
        if (DEBUG_ENABLED) {
            System.out.println("DEBUG>>> " + str);
        }
    }

}
