/*
   * 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.rat.anttasks;
  
  import java.io.File;
  import java.io.IOException;
  import java.io.PrintWriter;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  
  import org.apache.commons.cli.Option;
  import org.apache.commons.io.filefilter.IOFileFilter;
  import org.apache.rat.ConfigurationException;
  import org.apache.rat.DeprecationReporter;
  import org.apache.rat.ImplementationException;
  import org.apache.rat.OptionCollection;
  import org.apache.rat.ReportConfiguration;
  import org.apache.rat.Reporter;
  import org.apache.rat.commandline.Arg;
  import org.apache.rat.commandline.StyleSheets;
  import org.apache.rat.document.DocumentName;
  import org.apache.rat.license.LicenseSetFactory;
  import org.apache.rat.utils.DefaultLog;
  import org.apache.rat.utils.Log;
  import org.apache.tools.ant.BuildException;
  import org.apache.tools.ant.Project;
  import org.apache.tools.ant.taskdefs.LogOutputStream;
  import org.apache.tools.ant.types.EnumeratedAttribute;
  import org.apache.tools.ant.types.Resource;
  import org.apache.tools.ant.types.ResourceCollection;
  import org.apache.tools.ant.types.resources.Union;
  
  /**
   * A basic Ant task that generates a report on all files specified by the nested
   * resource collection(s).
   *
   * <p>
   * IHeaderMatcher(s) can be specified as nested elements as well.
   * </p>
   *
   * <p>
   * The attribute <code>format</code> defines the output format and can take the
   * values
   * <ul>
   * <li>xml - RAT's native XML output.</li>
   * <li>styled - transforms the XML output using the given stylesheet. The
   * stylesheet attribute must be set as well if this attribute is used.</li>
   * <li>plain - plain text using RAT's built-in stylesheet. This is the
   * default.</li>
   * </ul>
   */
  public class Report extends BaseAntTask {
      /**
       * The list of licenses
       */
      @Deprecated
      private final List<License> licenses = new ArrayList<>();
      /**
       * The list of license families
       */
      @Deprecated
      private final List<Family> families = new ArrayList<>();
      /**
       * the options that are deprecated.  TODO remove this.
       */
      private final DeprecatedConfig deprecatedConfig = new DeprecatedConfig();
      /**
       * will hold any nested resource collection
       */
      private Union nestedResources;
  
      /**
       * Collection of objects that support Ant specific deprecated options
       */
      private static final class DeprecatedConfig {
          /**
           * The input file filter
           */
          private IOFileFilter inputFileFilter;
          /**
          * the set of approved license categories
          */
         private final Set<String> approvedLicenseCategories = new HashSet<>();
         /**
          * the set of removed (unapproved) license categories
          */
         private final Set<String> removedLicenseCategories = new HashSet<>();
     }
 
     /**
      * Constructor.
      */
     public Report() {
         super();
         // replace the logger only if it has not already been set.
         Log oldLog = DefaultLog.getInstance();
         if (oldLog instanceof DefaultLog) {
             DefaultLog.setInstance(new Logger());
             DefaultLog.getInstance().setLevel(oldLog.getLevel());
         }
     }
 
     /**
      * Adds resources that will be checked.
      *
      * @param rc resource to check.
      */
     public void add(final ResourceCollection rc) {
         if (nestedResources == null) {
             nestedResources = new Union();
         }
         nestedResources.add(rc);
     }
 
     /**
      * Adds an input file filter.
      *
      * @param inputFileFilter The input file filter to add.
      */
     @Deprecated
     public void setInputFileFilter(final IOFileFilter inputFileFilter) {
         DeprecationReporter.logDeprecated("element inputFileFilter", "0.17", true, "outputFile element");
         deprecatedConfig.inputFileFilter = inputFileFilter;
     }
 
     /**
      * Sets the report file.
      *
      * @param reportFile the report file.
      * @deprecated use outputFile element
      */
     @Deprecated
     public void setReportFile(final File reportFile) {
         DeprecationReporter.logDeprecated("element reportFile", "0.17", true, "outputFile element");
         addArg("output-file", reportFile.getAbsolutePath());
     }
 
     /**
      * Adds an inline License definition to the system.
      *
      * @param license the license to add.
      * @deprecated Create a custom configuration file and use the config option.
      */
     @Deprecated
     public void addLicense(final License license) {
         licenses.add(license);
     }
 
     /**
      * Add an inline license family definition to the system.
      *
      * @param family the license family to add.
      * @deprecated Create a custom configuration file and use the config option.
      */
     @Deprecated
     public void addFamily(final Family family) {
         families.add(family);
     }
 
     /**
      * Adds a style sheet to the system.
      *
      * @param styleSheet The style sheet to use for formatting.
      * @deprecated use {@link #setStylesheet(String)}
      */
     @Deprecated
     public void addStylesheet(final Resource styleSheet) {
         DeprecationReporter.logDeprecated("element stylesheet", "0.17", true, "<outputStyle> element");
         setStylesheet(styleSheet.getName());
     }
 
     /**
      * Adds a given style sheet to the report.
      *
      * @param styleSheet style sheet to use in this report.
      * @deprecated use {@link #setOutputStyle(String)}
      */
     @Deprecated
     public void addStyleSheet(final Resource styleSheet) {
         DeprecationReporter.logDeprecated("attribute styleSheet", "0.17", true, "<outputStyle> element");
         setOutputStyle(styleSheet.getName());
     }
 
     /**
      * Styles the report or deliver xml document.
      *
      * @param styleReport true to use the plain-rat style
      * @deprecated use {@link #setOutputStyle(String)} and pass "xml" or "plain-rat".
      */
     @Deprecated
     public void setStyleReport(final boolean styleReport) {
         setOutputStyle(styleReport ? "xml" : "plain-rat");
     }
 
     /**
      * Determines if the output should be styled.
      *
      * @param style the name of the style sheet ot use, or "styled" for plain-rat style
      * @deprecated use {@link #setStylesheet(String)}
      */
     @Deprecated
     public void setFormat(final String style) {
         DeprecationReporter.logDeprecated("attribute format", "0.17", true, "outputStyle element");
         if ("styled".equalsIgnoreCase(style)) {
             setOutputStyle("plain-rat");
         } else {
             setOutputStyle(style);
         }
     }
 
     /**
      * Adds as a file containing the definitions of licenses to the system.
      *
      * @param fileName the file to add.
      * @deprecated create a configuration file and use the &lt;config&gt; child element.
      */
     @Deprecated
     public void setLicenses(final File fileName) {
         DeprecationReporter.logDeprecated("attribute licenses", "0.17", true, "<licences> element");
         setArg(Arg.CONFIGURATION.option().getLongOpt(), fileName.getAbsolutePath());
     }
 
     /**
      * Specifies whether to add the default list of license matchers.
      *
      * @param useDefaultLicenses if {@code true} use the default licenses.
      * @deprecated use noDefaultLicenses attribute
      */
     @Deprecated
     public void setUseDefaultLicenses(final boolean useDefaultLicenses) {
         DeprecationReporter.logDeprecated("attribute useDefaultLicenses", "0.17", true, "noDefaultLicenses attribute");
         setNoDefaultLicenses(!useDefaultLicenses);
     }
 
     /**
      * Adds a family category to the list of approved licenses.
      *
      * @param familyCategory the category to add.
      * @deprecated use licensesApproved child element.
      */
     @Deprecated
     public void setAddApprovedLicense(final String familyCategory) {
         DeprecationReporter.logDeprecated("attribute addApprovedLicense", "0.17", true, "<licensesApproved> element");
         deprecatedConfig.approvedLicenseCategories.add(familyCategory);
     }
 
     /**
      * Adds a family category to the list of approved licenses.
      *
      * @param familyCategory the category to add
      * @deprecated use licensesFamiliesApproved child element
      */
     @Deprecated
     public void addAddApprovedLicense(final String familyCategory) {
         DeprecationReporter.logDeprecated("element <addApprovedLicense>", "0.17", true, "<licenseFamiliesApproved> element");
         deprecatedConfig.approvedLicenseCategories.add(familyCategory);
     }
 
     /**
      * Removes a family category to the list of approved licenses.
      *
      * @param familyCategory the category to add.
      * @deprecated use licensesFamiliesDenied child element
      */
     @Deprecated
     public void setRemoveApprovedLicense(final String familyCategory) {
         DeprecationReporter.logDeprecated("attribute addApprovedLicense", "0.17", true, "<licenseFamiliesApproved> element");
         deprecatedConfig.removedLicenseCategories.add(familyCategory);
     }
 
     /**
      * Removes a family category to the list of approved licenses.
      *
      * @param familyCategory the category to add.
      * @deprecated use licensesFamiliesDenied child element
      */
     @Deprecated
     public void addRemoveApprovedLicense(final String familyCategory) {
         DeprecationReporter.logDeprecated("element <removeApprovedLicense>", "0.17", true, "<licenseFamiliesDenied> element");
         deprecatedConfig.removedLicenseCategories.add(familyCategory);
     }
 
     /**
      * Removes a family category to the list of approved licenses.
      *
      * @param familyCategory the category to remove
      * @deprecated use licenseFamiliesDenied element
      */
     @Deprecated
     public void setRemoveApprovedLicense(final String[] familyCategory) {
         DeprecationReporter.logDeprecated("attribute removeApprovedLicense", "0.17", true, "<licenseFamiliesDenied> element");
         deprecatedConfig.removedLicenseCategories.addAll(Arrays.asList(familyCategory));
     }
 
     /**
      * Removes a family category to the list of approved licenses.
      *
      * @param familyCategory the category to remove.
      * @deprecated use licenseFamilyDenied element
      */
     @Deprecated
     public void addRemoveApprovedLicense(final String[] familyCategory) {
         DeprecationReporter.logDeprecated("element <removeApprovedLicense>", "0.17", true, "<licenseFamiliesDenied> element");
         deprecatedConfig.removedLicenseCategories.addAll(Arrays.asList(familyCategory));
     }
 
     /**
      * Sets the copyright message.
      *
      * @param copyrightMessage the copyright message
      * @deprecated use copyright attribute
      */
     @Deprecated
     public void setCopyrightMessage(final String copyrightMessage) {
         setCopyright(copyrightMessage);
     }
 
     /**
      * Determines if license headers should be added.
      *
      * @param setting the setting.
      * @deprecated use editLicense and editOverwrite attributes
      */
     @Deprecated
     public void setAddLicenseHeaders(final AddLicenseHeaders setting) {
         DeprecationReporter.logDeprecated("attribute addLicenseHeaders", "0.17", true, "editLicense and editOverwrite attributes");
         switch (setting.getNative()) {
             case TRUE:
                 setEditLicense(true);
                 break;
             case FALSE:
                 setEditLicense(false);
                 break;
             case FORCED:
                 setEditLicense(true);
                 setEditOverwrite(true);
                 break;
         }
     }
 
     /**
      * Adds definition information.
      *
      * @param fileName the file to add
      * @deprecated Use Config child element
      */
     @Deprecated
     public void setAddDefaultDefinitions(final File fileName) {
         DeprecationReporter.logDeprecated("element <addDefaultDefinitions>", "0.17", true, "<config> element");
         setArg(Arg.CONFIGURATION.option().getLongOpt(), fileName.getAbsolutePath());
     }
 
     /**
      * Reads values for the Arg.
      *
      * @param arg The Arg to get the values for.
      * @return The list of values or an empty list.
      */
     protected List<String> getValues(final Arg arg) {
         List<String> result = new ArrayList<>();
         for (Option option : arg.group().getOptions()) {
             if (option.getLongOpt() != null) {
                 List<String> args = getArg(option.getLongOpt());
                 if (args != null) {
                     result.addAll(args);
                 }
             }
         }
         return result;
     }
 
     /**
      * Removes the values for the arg.
      *
      * @param arg the arg to remove the values for.
      */
     protected void removeKey(final Arg arg) {
         for (Option option : arg.group().getOptions()) {
             if (option.getLongOpt() != null) {
                 removeArg(option.getLongOpt());
             }
         }
     }
 
     /**
      * Creates the ReportConfiguration from the Ant options.
      *
      * @return the ReportConfiguration.
      */
     public ReportConfiguration getConfiguration() {
         try {
             boolean helpLicenses = !getValues(Arg.HELP_LICENSES).isEmpty();
             removeKey(Arg.HELP_LICENSES);
 
             final ReportConfiguration configuration = OptionCollection.parseCommands(new File("."), args().toArray(new String[0]),
                     o -> DefaultLog.getInstance().warn("Help option not supported"),
                     true);
             if (getValues(Arg.OUTPUT_FILE).isEmpty()) {
                 configuration.setOut(() -> new LogOutputStream(this, Project.MSG_INFO));
             }
             DocumentName name = DocumentName.builder(getProject().getBaseDir()).build();
             configuration.addSource(new ResourceCollectionContainer(name, configuration, nestedResources));
             configuration.addApprovedLicenseCategories(deprecatedConfig.approvedLicenseCategories);
             configuration.removeApprovedLicenseCategories(deprecatedConfig.removedLicenseCategories);
             if (deprecatedConfig.inputFileFilter != null) {
                 configuration.addExcludedFilter(deprecatedConfig.inputFileFilter);
             }
             families.stream().map(Family::build).forEach(configuration::addFamily);
             licenses.stream().map(License::asBuilder)
                     .forEach(l -> configuration.addApprovedLicenseCategory(configuration.addLicense(l).getLicenseFamily()));
             if (helpLicenses) {
                 new org.apache.rat.help.Licenses(configuration, new PrintWriter(DefaultLog.getInstance().asWriter())).printHelp();
             }
             return configuration;
         } catch (IOException | ImplementationException e) {
             throw new BuildException(e.getMessage(), e);
         }
     }
 
     /**
      * Generates the report.
      */
     @Override
     public void execute() {
         try {
             Reporter r = new Reporter(validate(getConfiguration()));
             r.output(StyleSheets.PLAIN.getStyleSheet(), () -> new ReportConfiguration.NoCloseOutputStream(System.out));
             r.output();
         } catch (BuildException e) {
             throw e;
         } catch (Exception ioex) {
             throw new BuildException(ioex);
         }
     }
 
     /**
      * Validates the task's configuration.
      */
     protected ReportConfiguration validate(final ReportConfiguration cfg) {
         try {
             cfg.validate(s -> log(s, Project.MSG_WARN));
         } catch (ConfigurationException e) {
             throw new BuildException(e.getMessage(), e.getCause());
         }
         if (nestedResources == null) {
             throw new BuildException("You must specify at least one file to create the report for.");
         }
         return cfg;
     }
 
     /**
      * Add headers to files that do not have them.
      *
      * @deprecated use &lt;editCopyright&gt; amd &lt;editOverwrite&gt; instead.
      */
     @Deprecated
     public static class AddLicenseHeaders extends EnumeratedAttribute {
         /**
          * add license headers and create *.new file
          */
         static final String TRUE = "true";
         /**
          * do not add license headers
          */
         static final String FALSE = "false";
         /**
          * add license headers and overwrite existing files
          */
         static final String FORCED = "forced";
 
         public AddLicenseHeaders() {
         }
 
         public AddLicenseHeaders(final String s) {
             setValue(s);
         }
 
         @Override
         public String[] getValues() {
             return new String[]{TRUE, FALSE, FORCED};
         }
 
         public org.apache.rat.config.AddLicenseHeaders getNative() {
             return org.apache.rat.config.AddLicenseHeaders.valueOf(getValue().toUpperCase());
         }
     }
 
     /**
      * Specify the licenses that are approved.
      *
      * @deprecated use listLicenses or listFamilies attributes.
      */
     @Deprecated
     public static class ApprovalFilter extends EnumeratedAttribute {
 
         public ApprovalFilter() {
         }
 
         public ApprovalFilter(final String s) {
             setValue(s);
         }
 
         @Override
         public String[] getValues() {
             return Arrays.stream(LicenseSetFactory.LicenseFilter.values()).map(LicenseSetFactory.LicenseFilter::name)
                     .toList().toArray(new String[LicenseSetFactory.LicenseFilter.values().length]);
         }
 
         public LicenseSetFactory.LicenseFilter internalFilter() {
             return LicenseSetFactory.LicenseFilter.valueOf(getValue());
         }
     }
 
     @Override
     public void log(final String msg, final int msgLevel) {
         if (getProject() != null) {
             getProject().log(msg, msgLevel);
         } else {
             DefaultLog.createDefault().log(fromProjectLevel(msgLevel), msg);
         }
     }
 
     @Override
     public void log(final String msg, final Throwable t, final int msgLevel) {
         if (getProject() == null) {
             log(Log.formatLogEntry(msg, t), msgLevel);
         } else {
             getProject().log(this, msg, t, msgLevel);
         }
     }
 
     /**
      * Converts to RAT log level from Ant Project log level.
      * @param level the Ant Project log level to convert.
      * @return the equivalent RAT log level.
      */
     public static Log.Level fromProjectLevel(final int level) {
         return switch (level) {
             case Project.MSG_DEBUG, Project.MSG_VERBOSE -> Log.Level.DEBUG;
             case Project.MSG_INFO -> Log.Level.INFO;
             case Project.MSG_WARN -> Log.Level.WARN;
             case Project.MSG_ERR -> Log.Level.ERROR;
             default -> Log.Level.OFF;
         };
     }
 
     /**
      * Converts RAT log level to Ant Project log level.
      * @param level the RAT log level to convert.
      * @return the equivalent Ant Project log level.
      */
     static int toProjectLevel(final Log.Level level) {
         return switch (level) {
             case DEBUG -> Project.MSG_DEBUG;
             case INFO -> Project.MSG_INFO;
             case WARN -> Project.MSG_WARN;
             case ERROR -> Project.MSG_ERR;
             default -> -1;
         };
     }
 
     /**
      * A facade for the Logger provided by Ant.
      */
     private final class Logger implements Log {
         @Override
         public Level getLevel() {
             return Level.DEBUG;
         }
 
         @Override
         public void log(final Log.Level level, final String message, final Throwable throwable) {
             log(level, Log.formatLogEntry(message, throwable));
         }
 
         @Override
         public void log(final Level level, final String msg) {
             Report.this.log(msg, toProjectLevel(level));
         }
     }
 }