/*
    * 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.project;
  
  import java.io.File;
  import java.util.List;
  
  import org.apache.maven.model.building.ModelProblem;
  
  /**
   */
  public class ProjectBuildingException extends Exception {
      private final String projectId;
  
      private File pomFile;
  
      private List<ProjectBuildingResult> results;
  
      public ProjectBuildingException(String projectId, String message, Throwable cause) {
          super(createMessage(message, projectId, null), cause);
          this.projectId = projectId;
      }
  
      /**
       * @param projectId
       * @param message
       * @param pomFile   pom file location
       */
      public ProjectBuildingException(String projectId, String message, File pomFile) {
          super(createMessage(message, projectId, pomFile));
          this.projectId = projectId;
          this.pomFile = pomFile;
      }
  
      /**
       * @param projectId
       * @param message
       * @param pomFile   pom file location
       * @param cause
       */
      protected ProjectBuildingException(String projectId, String message, File pomFile, Throwable cause) {
          super(createMessage(message, projectId, pomFile), cause);
          this.projectId = projectId;
          this.pomFile = pomFile;
      }
  
      public ProjectBuildingException(List<ProjectBuildingResult> results) {
          super(createMessage(results));
          this.projectId = "";
          this.results = results;
      }
  
      public File getPomFile() {
          return pomFile;
      }
  
      /**
       * @deprecated use {@link #getPomFile()}
       */
      @Deprecated
      public String getPomLocation() {
          if (getPomFile() != null) {
              return getPomFile().getAbsolutePath();
          } else {
              return "null";
          }
      }
  
      public String getProjectId() {
          return projectId;
      }
  
      public List<ProjectBuildingResult> getResults() {
          return results;
      }
  
      private static String createMessage(String message, String projectId, File pomFile) {
          StringBuilder buffer = new StringBuilder(256);
          buffer.append(message);
          buffer.append(" for project ").append(projectId);
          if (pomFile != null) {
              buffer.append(" at ").append(pomFile.getAbsolutePath());
          }
         return buffer.toString();
     }
 
     private static String createMessage(List<ProjectBuildingResult> results) {
         if (results == null || results.isEmpty()) {
             return "Some problems were encountered while processing the POMs";
         }
 
         long totalProblems = 0;
         long errorProblems = 0;
 
         for (ProjectBuildingResult result : results) {
             List<ModelProblem> problems = result.getProblems();
             totalProblems += problems.size();
 
             for (ModelProblem problem : problems) {
                 if (problem.getSeverity() != ModelProblem.Severity.WARNING) {
                     errorProblems++;
                 }
             }
         }
 
         StringBuilder buffer = new StringBuilder(1024);
         buffer.append(totalProblems);
         buffer.append(totalProblems == 1 ? " problem was " : " problems were ");
         buffer.append("encountered while processing the POMs");
 
         if (errorProblems > 0) {
             buffer.append(" (")
                     .append(errorProblems)
                     .append(" ")
                     .append(errorProblems > 1 ? "errors" : "error")
                     .append(")");
         }
 
         buffer.append(":\n");
 
         for (ProjectBuildingResult result : results) {
             if (!result.getProblems().isEmpty()) {
                 String projectInfo = result.getProjectId();
                 if (projectInfo.trim().isEmpty()) {
                     projectInfo =
                             result.getPomFile() != null ? result.getPomFile().getName() : "unknown project";
                 }
 
                 buffer.append("\n[").append(projectInfo).append("]\n");
 
                 for (ModelProblem problem : result.getProblems()) {
                     if (errorProblems > 0 && problem.getSeverity() == ModelProblem.Severity.WARNING) {
                         continue;
                     }
 
                     buffer.append("  [").append(problem.getSeverity()).append("] ");
                     buffer.append(problem.getMessage());
 
                     String location = "";
                     if (!problem.getSource().trim().isEmpty()) {
                         location = problem.getSource();
                     }
                     if (problem.getLineNumber() > 0) {
                         if (!location.isEmpty()) {
                             location += ", ";
                         }
                         location += "line " + problem.getLineNumber();
                     }
                     if (problem.getColumnNumber() > 0) {
                         if (!location.isEmpty()) {
                             location += ", ";
                         }
                         location += "column " + problem.getColumnNumber();
                     }
 
                     if (!location.isEmpty()) {
                         buffer.append(" @ ").append(location);
                     }
                     buffer.append("\n");
                 }
             }
         }
 
         return buffer.toString();
     }
 }