/*
    * 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.cling.invoker.mvnup.goals;
  
  import java.io.File;
  import java.io.FileWriter;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.util.Comparator;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  import org.apache.maven.api.RemoteRepository;
  import org.apache.maven.api.Session;
  import org.apache.maven.api.cli.mvnup.UpgradeOptions;
  import org.apache.maven.api.di.Inject;
  import org.apache.maven.api.di.Named;
  import org.apache.maven.api.di.Priority;
  import org.apache.maven.api.di.Singleton;
  import org.apache.maven.api.model.Build;
  import org.apache.maven.api.model.Model;
  import org.apache.maven.api.model.Parent;
  import org.apache.maven.api.model.Plugin;
  import org.apache.maven.api.model.PluginManagement;
  import org.apache.maven.api.model.Repository;
  import org.apache.maven.api.model.RepositoryPolicy;
  import org.apache.maven.api.services.ModelBuilder;
  import org.apache.maven.api.services.ModelBuilderRequest;
  import org.apache.maven.api.services.ModelBuilderResult;
  import org.apache.maven.api.services.RepositoryFactory;
  import org.apache.maven.api.services.Sources;
  import org.apache.maven.cling.invoker.mvnup.UpgradeContext;
  import org.apache.maven.impl.standalone.ApiRunner;
  import org.codehaus.plexus.components.secdispatcher.Dispatcher;
  import org.codehaus.plexus.components.secdispatcher.internal.dispatchers.LegacyDispatcher;
  import org.eclipse.aether.internal.impl.DefaultPathProcessor;
  import org.eclipse.aether.internal.impl.DefaultTransporterProvider;
  import org.eclipse.aether.internal.impl.transport.http.DefaultChecksumExtractor;
  import org.eclipse.aether.spi.connector.transport.TransporterProvider;
  import org.eclipse.aether.transport.file.FileTransporterFactory;
  import org.eclipse.aether.transport.jdk.JdkTransporterFactory;
  import org.jdom2.Document;
  import org.jdom2.Element;
  import org.jdom2.Namespace;
  import org.jdom2.output.XMLOutputter;
  
  import static org.apache.maven.cling.invoker.mvnup.goals.UpgradeConstants.Plugins.DEFAULT_MAVEN_PLUGIN_GROUP_ID;
  import static org.apache.maven.cling.invoker.mvnup.goals.UpgradeConstants.Plugins.MAVEN_4_COMPATIBILITY_REASON;
  import static org.apache.maven.cling.invoker.mvnup.goals.UpgradeConstants.Plugins.MAVEN_PLUGIN_PREFIX;
  import static org.apache.maven.cling.invoker.mvnup.goals.UpgradeConstants.XmlElements.ARTIFACT_ID;
  import static org.apache.maven.cling.invoker.mvnup.goals.UpgradeConstants.XmlElements.BUILD;
  import static org.apache.maven.cling.invoker.mvnup.goals.UpgradeConstants.XmlElements.GROUP_ID;
  import static org.apache.maven.cling.invoker.mvnup.goals.UpgradeConstants.XmlElements.PARENT;
  import static org.apache.maven.cling.invoker.mvnup.goals.UpgradeConstants.XmlElements.PLUGIN;
  import static org.apache.maven.cling.invoker.mvnup.goals.UpgradeConstants.XmlElements.PLUGINS;
  import static org.apache.maven.cling.invoker.mvnup.goals.UpgradeConstants.XmlElements.PLUGIN_MANAGEMENT;
  import static org.apache.maven.cling.invoker.mvnup.goals.UpgradeConstants.XmlElements.VERSION;
  
  /**
   * Strategy for upgrading Maven plugins to recommended versions.
   * Handles plugin version upgrades in build/plugins and build/pluginManagement sections.
   */
  @Named
  @Singleton
  @Priority(10)
  public class PluginUpgradeStrategy extends AbstractUpgradeStrategy {
  
      private static final List<PluginUpgrade> PLUGIN_UPGRADES = List.of(
              new PluginUpgrade(
                      DEFAULT_MAVEN_PLUGIN_GROUP_ID, "maven-compiler-plugin", "3.2.0", MAVEN_4_COMPATIBILITY_REASON),
              new PluginUpgrade(
                      DEFAULT_MAVEN_PLUGIN_GROUP_ID, "maven-exec-plugin", "3.2.0", MAVEN_4_COMPATIBILITY_REASON),
              new PluginUpgrade(
                      DEFAULT_MAVEN_PLUGIN_GROUP_ID, "maven-enforcer-plugin", "3.0.0", MAVEN_4_COMPATIBILITY_REASON),
              new PluginUpgrade("org.codehaus.mojo", "flatten-maven-plugin", "1.2.7", MAVEN_4_COMPATIBILITY_REASON),
              new PluginUpgrade(
                      DEFAULT_MAVEN_PLUGIN_GROUP_ID, "maven-shade-plugin", "3.5.0", MAVEN_4_COMPATIBILITY_REASON),
              new PluginUpgrade(
                      DEFAULT_MAVEN_PLUGIN_GROUP_ID,
                      "maven-remote-resources-plugin",
                     "3.0.0",
                     MAVEN_4_COMPATIBILITY_REASON));
 
     private Session session;
 
     @Inject
     public PluginUpgradeStrategy() {}
 
     @Override
     public boolean isApplicable(UpgradeContext context) {
         UpgradeOptions options = getOptions(context);
         return isOptionEnabled(options, options.plugins(), true);
     }
 
     @Override
     public String getDescription() {
         return "Upgrading Maven plugins to recommended versions";
     }
 
     @Override
     public UpgradeResult doApply(UpgradeContext context, Map<Path, Document> pomMap) {
         Set<Path> processedPoms = new HashSet<>();
         Set<Path> modifiedPoms = new HashSet<>();
         Set<Path> errorPoms = new HashSet<>();
 
         try {
             // Phase 1: Write all modifications to temp directory (keeping project structure)
             Path tempDir = createTempProjectStructure(context, pomMap);
 
             // Phase 2: For each POM, build effective model using the session and analyze plugins
             Map<Path, Set<String>> pluginsNeedingManagement =
                     analyzePluginsUsingEffectiveModels(context, pomMap, tempDir);
 
             // Phase 3: Add plugin management to the last local parent in hierarchy
             for (Map.Entry<Path, Document> entry : pomMap.entrySet()) {
                 Path pomPath = entry.getKey();
                 Document pomDocument = entry.getValue();
                 processedPoms.add(pomPath);
 
                 context.info(pomPath + " (checking for plugin upgrades)");
                 context.indent();
 
                 try {
                     boolean hasUpgrades = false;
 
                     // Apply direct plugin upgrades in the document
                     hasUpgrades |= upgradePluginsInDocument(pomDocument, context);
 
                     // Add plugin management based on effective model analysis
                     // Note: pluginsNeedingManagement only contains entries for POMs that should receive plugin
                     // management
                     // (i.e., the "last local parent" for each plugin that needs management)
                     Set<String> pluginsForThisPom = pluginsNeedingManagement.get(pomPath);
                     if (pluginsForThisPom != null && !pluginsForThisPom.isEmpty()) {
                         hasUpgrades |= addPluginManagementForEffectivePlugins(context, pomDocument, pluginsForThisPom);
                         context.detail("Added plugin management to " + pomPath + " (target parent for "
                                 + pluginsForThisPom.size() + " plugins)");
                     }
 
                     if (hasUpgrades) {
                         modifiedPoms.add(pomPath);
                         context.success("Plugin upgrades applied");
                     } else {
                         context.success("No plugin upgrades needed");
                     }
                 } catch (Exception e) {
                     context.failure("Failed to upgrade plugins: " + e.getMessage());
                     errorPoms.add(pomPath);
                 } finally {
                     context.unindent();
                 }
             }
 
             // Clean up temp directory
             cleanupTempDirectory(tempDir);
 
         } catch (Exception e) {
             context.failure("Failed to create temp project structure: " + e.getMessage());
             // Mark all POMs as errors
             errorPoms.addAll(pomMap.keySet());
         }
 
         return new UpgradeResult(processedPoms, modifiedPoms, errorPoms);
     }
 
     /**
      * Upgrades plugins in the document.
      * Checks both build/plugins and build/pluginManagement/plugins sections.
      * Only processes plugins explicitly defined in the current POM document.
      */
     private boolean upgradePluginsInDocument(Document pomDocument, UpgradeContext context) {
         Element root = pomDocument.getRootElement();
         Namespace namespace = root.getNamespace();
         boolean hasUpgrades = false;
 
         // Define the plugins that need to be upgraded for Maven 4 compatibility
         Map<String, PluginUpgradeInfo> pluginUpgrades = getPluginUpgradesMap();
 
         // Check build/plugins
         Element buildElement = root.getChild(UpgradeConstants.XmlElements.BUILD, namespace);
         if (buildElement != null) {
             Element pluginsElement = buildElement.getChild(PLUGINS, namespace);
             if (pluginsElement != null) {
                 hasUpgrades |= upgradePluginsInSection(
                         pluginsElement, namespace, pluginUpgrades, pomDocument, BUILD + "/" + PLUGINS, context);
             }
 
             // Check build/pluginManagement/plugins
             Element pluginManagementElement = buildElement.getChild(PLUGIN_MANAGEMENT, namespace);
             if (pluginManagementElement != null) {
                 Element managedPluginsElement = pluginManagementElement.getChild(PLUGINS, namespace);
                 if (managedPluginsElement != null) {
                     hasUpgrades |= upgradePluginsInSection(
                             managedPluginsElement,
                             namespace,
                             pluginUpgrades,
                             pomDocument,
                             BUILD + "/" + PLUGIN_MANAGEMENT + "/" + PLUGINS,
                             context);
                 }
             }
         }
 
         return hasUpgrades;
     }
 
     /**
      * Returns the map of plugins that need to be upgraded for Maven 4 compatibility.
      */
     private Map<String, PluginUpgradeInfo> getPluginUpgradesMap() {
         Map<String, PluginUpgradeInfo> upgrades = new HashMap<>();
         upgrades.put(
                 DEFAULT_MAVEN_PLUGIN_GROUP_ID + ":maven-compiler-plugin",
                 new PluginUpgradeInfo(DEFAULT_MAVEN_PLUGIN_GROUP_ID, "maven-compiler-plugin", "3.2"));
         upgrades.put(
                 "org.codehaus.mojo:exec-maven-plugin",
                 new PluginUpgradeInfo("org.codehaus.mojo", "exec-maven-plugin", "3.2.0"));
         upgrades.put(
                 DEFAULT_MAVEN_PLUGIN_GROUP_ID + ":maven-enforcer-plugin",
                 new PluginUpgradeInfo(DEFAULT_MAVEN_PLUGIN_GROUP_ID, "maven-enforcer-plugin", "3.0.0"));
         upgrades.put(
                 "org.codehaus.mojo:flatten-maven-plugin",
                 new PluginUpgradeInfo("org.codehaus.mojo", "flatten-maven-plugin", "1.2.7"));
         upgrades.put(
                 DEFAULT_MAVEN_PLUGIN_GROUP_ID + ":maven-shade-plugin",
                 new PluginUpgradeInfo(DEFAULT_MAVEN_PLUGIN_GROUP_ID, "maven-shade-plugin", "3.5.0"));
         upgrades.put(
                 DEFAULT_MAVEN_PLUGIN_GROUP_ID + ":maven-remote-resources-plugin",
                 new PluginUpgradeInfo(DEFAULT_MAVEN_PLUGIN_GROUP_ID, "maven-remote-resources-plugin", "3.0.0"));
         return upgrades;
     }
 
     /**
      * Upgrades plugins in a specific plugins section (either build/plugins or build/pluginManagement/plugins).
      */
     private boolean upgradePluginsInSection(
             Element pluginsElement,
             Namespace namespace,
             Map<String, PluginUpgradeInfo> pluginUpgrades,
             Document pomDocument,
             String sectionName,
             UpgradeContext context) {
         boolean hasUpgrades = false;
         List<Element> pluginElements = pluginsElement.getChildren(PLUGIN, namespace);
 
         for (Element pluginElement : pluginElements) {
             String groupId = getChildText(pluginElement, GROUP_ID, namespace);
             String artifactId = getChildText(pluginElement, ARTIFACT_ID, namespace);
 
             // Default groupId for Maven plugins
             if (groupId == null && artifactId != null && artifactId.startsWith(MAVEN_PLUGIN_PREFIX)) {
                 groupId = DEFAULT_MAVEN_PLUGIN_GROUP_ID;
             }
 
             if (groupId != null && artifactId != null) {
                 String pluginKey = groupId + ":" + artifactId;
                 PluginUpgradeInfo upgrade = pluginUpgrades.get(pluginKey);
 
                 if (upgrade != null) {
                     if (upgradePluginVersion(pluginElement, namespace, upgrade, pomDocument, sectionName, context)) {
                         hasUpgrades = true;
                     }
                 }
             }
         }
 
         return hasUpgrades;
     }
 
     /**
      * Upgrades a specific plugin's version if needed.
      */
     private boolean upgradePluginVersion(
             Element pluginElement,
             Namespace namespace,
             PluginUpgradeInfo upgrade,
             Document pomDocument,
             String sectionName,
             UpgradeContext context) {
         Element versionElement = pluginElement.getChild(VERSION, namespace);
         String currentVersion;
         boolean isProperty = false;
         String propertyName = null;
 
         if (versionElement != null) {
             currentVersion = versionElement.getTextTrim();
             // Check if version is a property reference
             if (currentVersion.startsWith("${") && currentVersion.endsWith("}")) {
                 isProperty = true;
                 propertyName = currentVersion.substring(2, currentVersion.length() - 1);
             }
         } else {
             // Plugin version might be inherited from parent or pluginManagement
             context.debug("Plugin " + upgrade.groupId + ":" + upgrade.artifactId
                     + " has no explicit version, may inherit from parent");
             return false;
         }
 
         if (isProperty) {
             // Update property value if it's below minimum version
             return upgradePropertyVersion(pomDocument, propertyName, upgrade, sectionName, context);
         } else {
             // Direct version comparison and upgrade
             if (isVersionBelow(currentVersion, upgrade.minVersion)) {
                 versionElement.setText(upgrade.minVersion);
                 context.detail("Upgraded " + upgrade.groupId + ":" + upgrade.artifactId + " from " + currentVersion
                         + " to " + upgrade.minVersion + " in " + sectionName);
                 return true;
             } else {
                 context.debug("Plugin " + upgrade.groupId + ":" + upgrade.artifactId + " version " + currentVersion
                         + " is already >= " + upgrade.minVersion);
             }
         }
 
         return false;
     }
 
     /**
      * Upgrades a property value if it represents a plugin version below the minimum.
      */
     private boolean upgradePropertyVersion(
             Document pomDocument,
             String propertyName,
             PluginUpgradeInfo upgrade,
             String sectionName,
             UpgradeContext context) {
         Element root = pomDocument.getRootElement();
         Namespace namespace = root.getNamespace();
         Element propertiesElement = root.getChild(UpgradeConstants.XmlElements.PROPERTIES, namespace);
 
         if (propertiesElement != null) {
             Element propertyElement = propertiesElement.getChild(propertyName, namespace);
             if (propertyElement != null) {
                 String currentVersion = propertyElement.getTextTrim();
                 if (isVersionBelow(currentVersion, upgrade.minVersion)) {
                     propertyElement.setText(upgrade.minVersion);
                     context.detail("Upgraded property " + propertyName + " (for " + upgrade.groupId
                             + ":"
                             + upgrade.artifactId + ") from " + currentVersion + " to " + upgrade.minVersion
                             + " in "
                             + sectionName);
                     return true;
                 } else {
                     context.debug("Property " + propertyName + " version " + currentVersion + " is already >= "
                             + upgrade.minVersion);
                 }
             } else {
                 context.warning("Property " + propertyName + " not found in POM properties");
             }
         } else {
             context.warning("No properties section found in POM for property " + propertyName);
         }
 
         return false;
     }
 
     /**
      * Simple version comparison to check if current version is below minimum version.
      * This is a basic implementation that works for most Maven plugin versions.
      */
     private boolean isVersionBelow(String currentVersion, String minVersion) {
         if (currentVersion == null || minVersion == null) {
             return false;
         }
 
         // Remove any qualifiers like -SNAPSHOT, -alpha, etc. for comparison
         String cleanCurrent = currentVersion.split("-")[0];
         String cleanMin = minVersion.split("-")[0];
 
         try {
             String[] currentParts = cleanCurrent.split("\\.");
             String[] minParts = cleanMin.split("\\.");
 
             int maxLength = Math.max(currentParts.length, minParts.length);
 
             for (int i = 0; i < maxLength; i++) {
                 int currentPart = i < currentParts.length ? Integer.parseInt(currentParts[i]) : 0;
                 int minPart = i < minParts.length ? Integer.parseInt(minParts[i]) : 0;
 
                 if (currentPart < minPart) {
                     return true;
                 } else if (currentPart > minPart) {
                     return false;
                 }
             }
 
             return false; // Versions are equal
         } catch (NumberFormatException e) {
             // Fallback to string comparison if parsing fails
             return currentVersion.compareTo(minVersion) < 0;
         }
     }
 
     /**
      * Helper method to get child element text.
      */
     private String getChildText(Element parent, String childName, Namespace namespace) {
         Element child = parent.getChild(childName, namespace);
         return child != null ? child.getTextTrim() : null;
     }
 
     /**
      * Gets the list of plugin upgrades to apply.
      */
     public static List<PluginUpgrade> getPluginUpgrades() {
         return PLUGIN_UPGRADES;
     }
 
     /**
      * Gets or creates the cached Maven 4 session.
      */
     private Session getSession() {
         if (session == null) {
             session = createMaven4Session();
         }
         return session;
     }
 
     /**
      * Creates a new Maven 4 session for effective POM computation.
      */
     private Session createMaven4Session() {
         Session session = ApiRunner.createSession(injector -> {
             injector.bindInstance(Dispatcher.class, new LegacyDispatcher());
 
             injector.bindInstance(
                     TransporterProvider.class,
                     new DefaultTransporterProvider(Map.of(
                             "https",
                             new JdkTransporterFactory(
                                     new DefaultChecksumExtractor(Map.of()), new DefaultPathProcessor()),
                             "file",
                             new FileTransporterFactory())));
         });
 
         // Configure repositories
         // TODO: we should read settings
         RemoteRepository central =
                 session.createRemoteRepository(RemoteRepository.CENTRAL_ID, "https://repo.maven.apache.org/maven2");
         RemoteRepository snapshots = session.getService(RepositoryFactory.class)
                 .createRemote(Repository.newBuilder()
                         .id("apache-snapshots")
                         .url("https://repository.apache.org/content/repositories/snapshots/")
                         .releases(RepositoryPolicy.newBuilder().enabled("false").build())
                         .snapshots(RepositoryPolicy.newBuilder().enabled("true").build())
                         .build());
 
         return session.withRemoteRepositories(List.of(central, snapshots));
     }
 
     /**
      * Creates a temporary project structure with all POMs written to preserve relative paths.
      * This allows Maven 4 API to properly resolve the project hierarchy.
      */
     private Path createTempProjectStructure(UpgradeContext context, Map<Path, Document> pomMap) throws Exception {
         Path tempDir = Files.createTempDirectory("mvnup-project-");
         context.debug("Created temp project directory: " + tempDir);
 
         // Find the common root of all POM paths to preserve relative structure
         Path commonRoot = findCommonRoot(pomMap.keySet());
         context.debug("Common root: " + commonRoot);
 
         // Write each POM to the temp directory, preserving relative structure
         for (Map.Entry<Path, Document> entry : pomMap.entrySet()) {
             Path originalPath = entry.getKey();
             Document document = entry.getValue();
 
             // Calculate the relative path from common root
             Path relativePath = commonRoot.relativize(originalPath);
             Path tempPomPath = tempDir.resolve(relativePath);
 
             // Ensure parent directories exist
             Files.createDirectories(tempPomPath.getParent());
 
             // Write POM to temp location
             writePomToFile(document, tempPomPath);
             context.debug("Wrote POM to temp location: " + tempPomPath);
         }
 
         return tempDir;
     }
 
     /**
      * Finds the common root directory of all POM paths.
      */
     private Path findCommonRoot(Set<Path> pomPaths) {
         Path commonRoot = null;
         for (Path pomPath : pomPaths) {
             Path parent = pomPath.getParent();
             if (parent == null) {
                 parent = Path.of(".");
             }
             if (commonRoot == null) {
                 commonRoot = parent;
             } else {
                 // Find common ancestor
                 while (!parent.startsWith(commonRoot)) {
                     commonRoot = commonRoot.getParent();
                     if (commonRoot == null) {
                         break;
                     }
                 }
             }
         }
         return commonRoot;
     }
 
     /**
      * Writes a JDOM Document to a file using the same format as the existing codebase.
      */
     private void writePomToFile(Document document, Path filePath) throws Exception {
         try (FileWriter writer = new FileWriter(filePath.toFile())) {
             XMLOutputter outputter = new XMLOutputter();
             outputter.output(document, writer);
         }
     }
 
     /**
      * Analyzes plugins using effective models built from the temp directory.
      * Returns a map of POM path to the set of plugin keys that need management.
      */
     private Map<Path, Set<String>> analyzePluginsUsingEffectiveModels(
             UpgradeContext context, Map<Path, Document> pomMap, Path tempDir) {
         Map<Path, Set<String>> result = new HashMap<>();
         Map<String, PluginUpgrade> pluginUpgrades = getPluginUpgradesAsMap();
 
         for (Map.Entry<Path, Document> entry : pomMap.entrySet()) {
             Path originalPomPath = entry.getKey();
 
             try {
                 // Find the corresponding temp POM path
                 Path commonRoot = findCommonRoot(pomMap.keySet());
                 Path relativePath = commonRoot.relativize(originalPomPath);
                 Path tempPomPath = tempDir.resolve(relativePath);
 
                 // Build effective model using Maven 4 API
                 Set<String> pluginsNeedingUpgrade =
                         analyzeEffectiveModelForPlugins(context, tempPomPath, pluginUpgrades);
 
                 // Determine where to add plugin management (last local parent)
                 Path targetPomForManagement =
                         findLastLocalParentForPluginManagement(context, tempPomPath, pomMap, tempDir, commonRoot);
 
                 if (targetPomForManagement != null) {
                     result.computeIfAbsent(targetPomForManagement, k -> new HashSet<>())
                             .addAll(pluginsNeedingUpgrade);
 
                     if (!pluginsNeedingUpgrade.isEmpty()) {
                         context.debug("Will add plugin management to " + targetPomForManagement + " for plugins: "
                                 + pluginsNeedingUpgrade);
                     }
                 }
 
             } catch (Exception e) {
                 context.debug("Failed to analyze effective model for " + originalPomPath + ": " + e.getMessage());
             }
         }
 
         return result;
     }
 
     /**
      * Converts PluginUpgradeInfo map to PluginUpgrade map for compatibility.
      */
     private Map<String, PluginUpgrade> getPluginUpgradesAsMap() {
         Map<String, PluginUpgrade> result = new HashMap<>();
         for (PluginUpgrade upgrade : PLUGIN_UPGRADES) {
             String key = upgrade.groupId() + ":" + upgrade.artifactId();
             result.put(key, upgrade);
         }
         return result;
     }
 
     /**
      * Analyzes the effective model for a single POM to find plugins that need upgrades.
      */
     private Set<String> analyzeEffectiveModelForPlugins(
             UpgradeContext context, Path tempPomPath, Map<String, PluginUpgrade> pluginUpgrades) {
 
         // Use the cached Maven 4 session
         Session session = getSession();
         ModelBuilder modelBuilder = session.getService(ModelBuilder.class);
 
         // Build effective model
         ModelBuilderRequest request = ModelBuilderRequest.builder()
                 .session(session)
                 .source(Sources.buildSource(tempPomPath))
                 .requestType(ModelBuilderRequest.RequestType.BUILD_EFFECTIVE)
                 .recursive(false) // We only want this POM, not its modules
                 .build();
 
         ModelBuilderResult result = modelBuilder.newSession().build(request);
         Model effectiveModel = result.getEffectiveModel();
 
         // Analyze plugins from effective model
         return analyzePluginsFromEffectiveModel(context, effectiveModel, pluginUpgrades);
     }
 
     /**
      * Analyzes plugins from the effective model and determines which ones need upgrades.
      */
     private Set<String> analyzePluginsFromEffectiveModel(
             UpgradeContext context, Model effectiveModel, Map<String, PluginUpgrade> pluginUpgrades) {
         Set<String> pluginsNeedingUpgrade = new HashSet<>();
 
         Build build = effectiveModel.getBuild();
         if (build != null) {
             // Check build/plugins - these are the actual plugins used in the build
             for (Plugin plugin : build.getPlugins()) {
                 String pluginKey = getPluginKey(plugin);
                 PluginUpgrade upgrade = pluginUpgrades.get(pluginKey);
                 if (upgrade != null) {
                     String effectiveVersion = plugin.getVersion();
                     if (isVersionBelow(effectiveVersion, upgrade.minVersion())) {
                         pluginsNeedingUpgrade.add(pluginKey);
                         context.debug("Plugin " + pluginKey + " version " + effectiveVersion + " needs upgrade to "
                                 + upgrade.minVersion());
                     }
                 }
             }
 
             // Check build/pluginManagement/plugins - these provide version management
             PluginManagement pluginManagement = build.getPluginManagement();
             if (pluginManagement != null) {
                 for (Plugin plugin : pluginManagement.getPlugins()) {
                     String pluginKey = getPluginKey(plugin);
                     PluginUpgrade upgrade = pluginUpgrades.get(pluginKey);
                     if (upgrade != null) {
                         String effectiveVersion = plugin.getVersion();
                         if (isVersionBelow(effectiveVersion, upgrade.minVersion())) {
                             pluginsNeedingUpgrade.add(pluginKey);
                             context.debug("Managed plugin " + pluginKey + " version " + effectiveVersion
                                     + " needs upgrade to " + upgrade.minVersion());
                         }
                     }
                 }
             }
         }
 
         return pluginsNeedingUpgrade;
     }
 
     /**
      * Gets the plugin key (groupId:artifactId) for a plugin, handling default groupId.
      */
     private String getPluginKey(Plugin plugin) {
         String groupId = plugin.getGroupId();
         String artifactId = plugin.getArtifactId();
 
         // Default groupId for Maven plugins
         if (groupId == null && artifactId != null && artifactId.startsWith(MAVEN_PLUGIN_PREFIX)) {
             groupId = DEFAULT_MAVEN_PLUGIN_GROUP_ID;
         }
 
         return groupId + ":" + artifactId;
     }
 
     /**
      * Finds the last local parent in the hierarchy where plugin management should be added.
      * This implements the algorithm: start with the effective model, check if parent is in pomMap,
      * if so continue to its parent, else that's the target.
      */
     private Path findLastLocalParentForPluginManagement(
             UpgradeContext context, Path tempPomPath, Map<Path, Document> pomMap, Path tempDir, Path commonRoot) {
 
         // Build effective model to get parent information
         Session session = getSession();
         ModelBuilder modelBuilder = session.getService(ModelBuilder.class);
 
         ModelBuilderRequest request = ModelBuilderRequest.builder()
                 .session(session)
                 .source(Sources.buildSource(tempPomPath))
                 .requestType(ModelBuilderRequest.RequestType.BUILD_EFFECTIVE)
                 .recursive(false)
                 .build();
 
         ModelBuilderResult result = modelBuilder.newSession().build(request);
         Model effectiveModel = result.getEffectiveModel();
 
         // Convert the temp path back to the original path
         Path relativePath = tempDir.relativize(tempPomPath);
         Path currentOriginalPath = commonRoot.resolve(relativePath);
 
         // Start with current POM as the candidate
         Path lastLocalParent = currentOriginalPath;
 
         // Walk up the parent hierarchy
         Model currentModel = effectiveModel;
         while (currentModel.getParent() != null) {
             Parent parent = currentModel.getParent();
 
             // Check if this parent is in our local pomMap
             Path parentPath = findParentInPomMap(parent, pomMap);
             if (parentPath != null) {
                 // Parent is local, so it becomes our new candidate
                 lastLocalParent = parentPath;
 
                 // Load the parent model to continue walking up
                 Path parentTempPath = tempDir.resolve(commonRoot.relativize(parentPath));
                 ModelBuilderRequest parentRequest = ModelBuilderRequest.builder()
                         .session(session)
                         .source(Sources.buildSource(parentTempPath))
                         .requestType(ModelBuilderRequest.RequestType.BUILD_EFFECTIVE)
                         .recursive(false)
                         .build();
 
                 ModelBuilderResult parentResult = modelBuilder.newSession().build(parentRequest);
                 currentModel = parentResult.getEffectiveModel();
             } else {
                 // Parent is external, stop here
                 break;
             }
         }
 
         context.debug("Last local parent for " + currentOriginalPath + " is " + lastLocalParent);
         return lastLocalParent;
     }
 
     /**
      * Finds a parent POM in the pomMap based on its coordinates.
      */
     private Path findParentInPomMap(Parent parent, Map<Path, Document> pomMap) {
         String parentGroupId = parent.getGroupId();
         String parentArtifactId = parent.getArtifactId();
         String parentVersion = parent.getVersion();
 
         for (Map.Entry<Path, Document> entry : pomMap.entrySet()) {
             Document doc = entry.getValue();
             Element root = doc.getRootElement();
             Namespace namespace = root.getNamespace();
 
             // Extract GAV from this POM
             String groupId = getChildText(root, GROUP_ID, namespace);
             String artifactId = getChildText(root, ARTIFACT_ID, namespace);
             String version = getChildText(root, VERSION, namespace);
 
             // Handle inheritance from parent
             Element parentElement = root.getChild(PARENT, namespace);
             if (parentElement != null) {
                 if (groupId == null) {
                     groupId = getChildText(parentElement, GROUP_ID, namespace);
                 }
                 if (version == null) {
                     version = getChildText(parentElement, VERSION, namespace);
                 }
             }
 
             // Check if this POM matches the parent coordinates
             if (parentGroupId.equals(groupId) && parentArtifactId.equals(artifactId) && parentVersion.equals(version)) {
                 return entry.getKey();
             }
         }
 
         return null; // Parent not found in local project
     }
 
     /**
      * Adds plugin management entries for plugins found through effective model analysis.
      */
     private boolean addPluginManagementForEffectivePlugins(
             UpgradeContext context, Document pomDocument, Set<String> pluginKeys) {
 
         Map<String, PluginUpgrade> pluginUpgrades = getPluginUpgradesAsMap();
         boolean hasUpgrades = false;
 
         Element root = pomDocument.getRootElement();
         Namespace namespace = root.getNamespace();
 
         // Ensure build/pluginManagement/plugins structure exists
         Element buildElement = root.getChild(BUILD, namespace);
         if (buildElement == null) {
             buildElement = JDomUtils.insertNewElement(BUILD, root);
         }
 
         Element pluginManagementElement = buildElement.getChild(PLUGIN_MANAGEMENT, namespace);
         if (pluginManagementElement == null) {
             pluginManagementElement = JDomUtils.insertNewElement(PLUGIN_MANAGEMENT, buildElement);
         }
 
         Element managedPluginsElement = pluginManagementElement.getChild(PLUGINS, namespace);
         if (managedPluginsElement == null) {
             managedPluginsElement = JDomUtils.insertNewElement(PLUGINS, pluginManagementElement);
         }
 
         // Add plugin management entries for each plugin
         for (String pluginKey : pluginKeys) {
             PluginUpgrade upgrade = pluginUpgrades.get(pluginKey);
             if (upgrade != null) {
                 // Check if plugin is already managed
                 if (!isPluginAlreadyManagedInElement(managedPluginsElement, namespace, upgrade)) {
                     addPluginManagementEntryFromUpgrade(managedPluginsElement, upgrade, context);
                     hasUpgrades = true;
                 }
             }
         }
 
         return hasUpgrades;
     }
 
     /**
      * Checks if a plugin is already managed in the given plugins element.
      */
     private boolean isPluginAlreadyManagedInElement(
             Element pluginsElement, Namespace namespace, PluginUpgrade upgrade) {
         List<Element> pluginElements = pluginsElement.getChildren(PLUGIN, namespace);
         for (Element pluginElement : pluginElements) {
             String groupId = getChildText(pluginElement, GROUP_ID, namespace);
             String artifactId = getChildText(pluginElement, ARTIFACT_ID, namespace);
 
             // Default groupId for Maven plugins
             if (groupId == null && artifactId != null && artifactId.startsWith(MAVEN_PLUGIN_PREFIX)) {
                 groupId = DEFAULT_MAVEN_PLUGIN_GROUP_ID;
             }
 
             if (upgrade.groupId().equals(groupId) && upgrade.artifactId().equals(artifactId)) {
                 return true;
             }
         }
         return false;
     }
 
     /**
      * Adds a plugin management entry from a PluginUpgrade.
      */
     private void addPluginManagementEntryFromUpgrade(
             Element managedPluginsElement, PluginUpgrade upgrade, UpgradeContext context) {
         // Create plugin element using JDomUtils for proper formatting
         Element pluginElement = JDomUtils.insertNewElement(PLUGIN, managedPluginsElement);
 
         // Add child elements using JDomUtils for proper formatting
         JDomUtils.insertContentElement(pluginElement, GROUP_ID, upgrade.groupId());
         JDomUtils.insertContentElement(pluginElement, ARTIFACT_ID, upgrade.artifactId());
         JDomUtils.insertContentElement(pluginElement, VERSION, upgrade.minVersion());
 
         context.detail("Added plugin management for " + upgrade.groupId() + ":" + upgrade.artifactId() + " version "
                 + upgrade.minVersion() + " (found through effective model analysis)");
     }
 
     /**
      * Cleans up the temporary directory.
      */
     private void cleanupTempDirectory(Path tempDir) {
         try {
             Files.walk(tempDir)
                     .sorted(Comparator.reverseOrder())
                     .map(Path::toFile)
                     .forEach(File::delete);
         } catch (Exception e) {
             // Best effort cleanup - don't fail the whole operation
         }
     }
 
     /**
      * Holds plugin upgrade information for Maven 4 compatibility.
      * This class contains the minimum version requirements for plugins
      * that need to be upgraded to work properly with Maven 4.
      */
     public static class PluginUpgradeInfo {
         /** The Maven groupId of the plugin */
         final String groupId;
 
         /** The Maven artifactId of the plugin */
         final String artifactId;
 
         /** The minimum version required for Maven 4 compatibility */
         final String minVersion;
 
         /**
          * Creates a new plugin upgrade information holder.
          *
          * @param groupId the Maven groupId of the plugin
          * @param artifactId the Maven artifactId of the plugin
          * @param minVersion the minimum version required for Maven 4 compatibility
          */
         PluginUpgradeInfo(String groupId, String artifactId, String minVersion) {
             this.groupId = groupId;
             this.artifactId = artifactId;
             this.minVersion = minVersion;
         }
     }
 }