/*
    * 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.internal.impl.model;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  import java.util.concurrent.CopyOnWriteArrayList;
  import java.util.stream.Collectors;
  import java.util.stream.Stream;
  
  import org.apache.maven.api.model.Model;
  import org.apache.maven.api.model.Profile;
  import org.apache.maven.api.services.ModelBuilderResult;
  import org.apache.maven.api.services.ModelProblem;
  import org.apache.maven.api.services.ModelSource;
  
  /**
   * Collects the output of the model builder.
   */
  class DefaultModelBuilderResult implements ModelBuilderResult {
      private ModelSource source;
      private Model fileModel;
      private Model rawModel;
      private Model parentModel;
      private Model effectiveModel;
      private List<Profile> activePomProfiles;
      private List<Profile> activeExternalProfiles;
      private final List<ModelProblem> problems = new CopyOnWriteArrayList<>();
      private final DefaultModelBuilderResult problemHolder;
  
      private final List<DefaultModelBuilderResult> children = new ArrayList<>();
  
      DefaultModelBuilderResult() {
          this(null);
      }
  
      DefaultModelBuilderResult(DefaultModelBuilderResult problemHolder) {
          this.problemHolder = problemHolder;
      }
  
      public ModelSource getSource() {
          return source;
      }
  
      public void setSource(ModelSource source) {
          this.source = source;
      }
  
      @Override
      public Model getFileModel() {
          return fileModel;
      }
  
      public void setFileModel(Model fileModel) {
          this.fileModel = fileModel;
      }
  
      @Override
      public Model getRawModel() {
          return rawModel;
      }
  
      public void setRawModel(Model rawModel) {
          this.rawModel = rawModel;
      }
  
      @Override
      public Model getParentModel() {
          return parentModel;
      }
  
      public void setParentModel(Model parentModel) {
          this.parentModel = parentModel;
      }
  
      @Override
      public Model getEffectiveModel() {
          return effectiveModel;
      }
  
      public void setEffectiveModel(Model model) {
          this.effectiveModel = model;
     }
 
     @Override
     public List<Profile> getActivePomProfiles() {
         return activePomProfiles;
     }
 
     public void setActivePomProfiles(List<Profile> activeProfiles) {
         this.activePomProfiles = activeProfiles;
     }
 
     @Override
     public List<Profile> getActiveExternalProfiles() {
         return activeExternalProfiles;
     }
 
     public void setActiveExternalProfiles(List<Profile> activeProfiles) {
         this.activeExternalProfiles = activeProfiles;
     }
 
     /**
      * Returns an unmodifiable list of problems encountered during the model building process.
      *
      * @return a list of ModelProblem instances representing the encountered problems,
      *         guaranteed to be non-null but possibly empty.
      */
     @Override
     public List<ModelProblem> getProblems() {
         return Collections.unmodifiableList(problems);
     }
 
     /**
      * Adds a given problem to the list of problems and propagates it to the parent result if present.
      *
      * @param problem The problem to be added. It must be an instance of ModelProblem.
      */
     public void addProblem(ModelProblem problem) {
         problems.add(problem);
         if (problemHolder != null) {
             problemHolder.addProblem(problem);
         }
     }
 
     @Override
     public List<DefaultModelBuilderResult> getChildren() {
         return children;
     }
 
     public String toString() {
         String modelId;
         if (effectiveModel != null) {
             modelId = effectiveModel.getId();
         } else if (rawModel != null) {
             modelId = rawModel.getId();
         } else if (fileModel != null) {
             modelId = fileModel.getId();
         } else {
             modelId = null;
         }
         if (!problems.isEmpty()) {
             StringBuilder sb = new StringBuilder();
             sb.append(problems.size())
                     .append(
                             (problems.size() == 1)
                                     ? " problem was "
                                     : " problems were encountered while building the effective model");
             if (modelId != null && !modelId.isEmpty()) {
                 sb.append(" for ");
                 sb.append(modelId);
             }
             for (ModelProblem problem : problems) {
                 sb.append(System.lineSeparator());
                 sb.append("    - [");
                 sb.append(problem.getSeverity());
                 sb.append("] ");
                 if (problem.getMessage() != null && !problem.getMessage().isEmpty()) {
                     sb.append(problem.getMessage());
                 } else if (problem.getException() != null) {
                     sb.append(problem.getException().toString());
                 }
                 String loc = Stream.of(
                                 problem.getModelId().equals(modelId) ? problem.getModelId() : "",
                                 problem.getModelId().equals(modelId) ? problem.getSource() : "",
                                 problem.getLineNumber() > 0 ? "line " + problem.getLineNumber() : "",
                                 problem.getColumnNumber() > 0 ? "column " + problem.getColumnNumber() : "")
                         .filter(s -> !s.isEmpty())
                         .collect(Collectors.joining(", "));
                 if (!loc.isEmpty()) {
                     sb.append(" @ ").append(loc);
                 }
             }
             return sb.toString();
         }
         return modelId;
     }
 }