/*
    * 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.plugins.resources;
  
  import javax.inject.Inject;
  
  import java.io.File;
  import java.nio.charset.Charset;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.LinkedHashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Properties;
  
  import org.apache.maven.execution.MavenSession;
  import org.apache.maven.model.Resource;
  import org.apache.maven.plugin.AbstractMojo;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.plugins.annotations.LifecyclePhase;
  import org.apache.maven.plugins.annotations.Mojo;
  import org.apache.maven.plugins.annotations.Parameter;
  import org.apache.maven.project.MavenProject;
  import org.apache.maven.shared.filtering.ChangeDetection;
  import org.apache.maven.shared.filtering.MavenFilteringException;
  import org.apache.maven.shared.filtering.MavenResourcesExecution;
  import org.apache.maven.shared.filtering.MavenResourcesFiltering;
  import org.codehaus.plexus.util.StringUtils;
  
  /**
   * Copy resources for the main source code to the main output directory. Always uses the project.build.resources element
   * to specify the resources to copy.
   *
   * @author <a href="michal.maczka@dimatics.com">Michal Maczka</a>
   * @author <a href="mailto:jason@maven.org">Jason van Zyl</a>
   * @author Andreas Hoheneder
   * @author William Ferguson
   */
  @Mojo(name = "resources", defaultPhase = LifecyclePhase.PROCESS_RESOURCES, threadSafe = true)
  public class ResourcesMojo extends AbstractMojo {
  
      /**
       * The character encoding to use when reading and writing filtered resources.
       */
      @Parameter(defaultValue = "${project.build.sourceEncoding}")
      protected String encoding;
  
      /**
       * The character encoding to use when reading and writing filtered properties files.
       * If not specified, it will default to the value of the "encoding" parameter.
       *
       * @since 3.2.0
       */
      @Parameter
      protected String propertiesEncoding;
  
      /**
       * The output directory into which to copy the resources.
       */
      @Parameter(defaultValue = "${project.build.outputDirectory}", required = true)
      private File outputDirectory;
  
      /**
       * The list of resources we want to transfer.
       */
      @Parameter(defaultValue = "${project.resources}", required = true, readonly = true)
      private List<Resource> resources;
  
      /**
       *
       */
      @Parameter(defaultValue = "${project}", readonly = true, required = true)
      protected MavenProject project;
  
      /**
       * The list of additional filter properties files to be used along with System and project properties, which would
       * be used for the filtering.
       *
       * @see ResourcesMojo#filters
       * @since 2.4
       */
      @Parameter(defaultValue = "${project.build.filters}", readonly = true)
     protected List<String> buildFilters;
 
     /**
      * <p>
      * The list of extra filter properties files to be used along with System properties, project properties, and filter
      * properties files specified in the POM build/filters section, which should be used for the filtering during the
      * current mojo execution.</p>
      * <p>
      * Normally, these will be configured from a plugin's execution section, to provide a different set of filters for a
      * particular execution. For instance, starting in Maven 2.2.0, you have the option of configuring executions with
      * the id's <code>default-resources</code> and <code>default-testResources</code> to supply different configurations
      * for the two different types of resources. By supplying <code>extraFilters</code> configurations, you can separate
      * which filters are used for which type of resource.</p>
      */
     @Parameter
     protected List<String> filters;
 
     /**
      * If false, don't use the filters specified in the build/filters section of the POM when processing resources in
      * this mojo execution.
      *
      * @see ResourcesMojo#buildFilters
      * @see ResourcesMojo#filters
      * @since 2.4
      */
     @Parameter(defaultValue = "true")
     protected boolean useBuildFilters;
 
     /**
      *
      */
     @Inject
     protected MavenResourcesFiltering mavenResourcesFiltering;
 
     /**
      *
      */
     @Inject
     protected Map<String, MavenResourcesFiltering> mavenResourcesFilteringMap;
 
     /**
      *
      */
     @Parameter(defaultValue = "${session}", readonly = true, required = true)
     protected MavenSession session;
 
     /**
      * Expressions preceded with this string won't be interpolated. Anything else preceded with this string will be
      * passed through unchanged. For example {@code \${foo}} will be replaced with {@code ${foo}} but {@code \\${foo}}
      * will be replaced with {@code \\value of foo}, if this parameter has been set to the backslash.
      *
      * @since 2.3
      */
     @Parameter
     protected String escapeString;
 
     /**
      * Overwrite existing files even if the destination files are newer.
      *
      * @since 2.3
      * @deprecated Use {@link #changeDetection} instead.
      */
     @Deprecated
     @Parameter(defaultValue = "false")
     private boolean overwrite;
 
     /**
      * The strategy to use for change detection. Supported values are listed below. If this parameter is configured,
      * it will override the value of {@link #overwrite}.
      *
      * Strategies and their behavior are as follows:
      * <ul>
      *     <li><strong>content</strong>: This is the default strategy since version 3.4.0. Overwrites existing target file only if content differs.</li>
      *     <li><strong>timestamp</strong>: This was the default strategy before version 3.4.0. Overwrites existing target file only if target timestamp is older than source timestamp.</li>
      *     <li><strong>timestamp+content</strong>: Combines the two strategies above; if timestamp is older and if content differs, existing target file will be overwritten.</li>
      *     <li><strong>always</strong>: Always overwrites existing target file. Equivalent of {@code overwrite=true}.</li>
      *     <li><strong>never</strong>: Never overwrites existing target file.</li>
      * </ul>
      *
      * Note: default value of this parameter is handled programmatically (as "content") for programmatic detection reasons.
      *
      * @since 3.5.0
      */
     @Parameter
     private String changeDetection;
 
     /**
      * Copy any empty directories included in the Resources.
      *
      * @since 2.3
      */
     @Parameter(defaultValue = "false")
     protected boolean includeEmptyDirs;
 
     /**
      * Additional file extensions to not apply filtering (already defined are : jpg, jpeg, gif, bmp, png)
      *
      * @since 2.3
      */
     @Parameter
     protected List<String> nonFilteredFileExtensions;
 
     /**
      * Whether to escape backslashes and colons in windows-style paths.
      *
      * @since 2.4
      */
     @Parameter(defaultValue = "true")
     protected boolean escapeWindowsPaths;
 
     /**
      * <p>
      * Set of delimiters for expressions to filter within the resources. These delimiters are specified in the form
      * {@code beginToken*endToken}. If no {@code *} is given, the delimiter is assumed to be the same for start and end.
      * </p>
      * <p>
      * So, the default filtering delimiters might be specified as:
      * </p>
      *
      * <pre>
      * &lt;delimiters&gt;
      *   &lt;delimiter&gt;${*}&lt;/delimiter&gt;
      *   &lt;delimiter&gt;@&lt;/delimiter&gt;
      * &lt;/delimiters&gt;
      * </pre>
      * <p>
      * Since the {@code @} delimiter is the same on both ends, we don't need to specify {@code @*@} (though we can).
      * </p>
      *
      * @since 2.4
      */
     @Parameter
     protected LinkedHashSet<String> delimiters;
 
     /**
      * Use default delimiters in addition to custom delimiters, if any.
      *
      * @since 2.4
      */
     @Parameter(defaultValue = "true")
     protected boolean useDefaultDelimiters;
 
     /**
      * By default files like {@code .gitignore}, {@code .cvsignore} etc. are excluded which means they will not being
      * copied. If you need them for a particular reason you can do that by settings this to {@code false}. This means
      * all files like the following will be copied.
      * <ul>
      * <li>Misc: &#42;&#42;/&#42;~, &#42;&#42;/#&#42;#, &#42;&#42;/.#&#42;, &#42;&#42;/%&#42;%, &#42;&#42;/._&#42;</li>
      * <li>CVS: &#42;&#42;/CVS, &#42;&#42;/CVS/&#42;&#42;, &#42;&#42;/.cvsignore</li>
      * <li>RCS: &#42;&#42;/RCS, &#42;&#42;/RCS/&#42;&#42;</li>
      * <li>SCCS: &#42;&#42;/SCCS, &#42;&#42;/SCCS/&#42;&#42;</li>
      * <li>VSSercer: &#42;&#42;/vssver.scc</li>
      * <li>MKS: &#42;&#42;/project.pj</li>
      * <li>SVN: &#42;&#42;/.svn, &#42;&#42;/.svn/&#42;&#42;</li>
      * <li>GNU: &#42;&#42;/.arch-ids, &#42;&#42;/.arch-ids/&#42;&#42;</li>
      * <li>Bazaar: &#42;&#42;/.bzr, &#42;&#42;/.bzr/&#42;&#42;</li>
      * <li>SurroundSCM: &#42;&#42;/.MySCMServerInfo</li>
      * <li>Mac: &#42;&#42;/.DS_Store</li>
      * <li>Serena Dimension: &#42;&#42;/.metadata, &#42;&#42;/.metadata/&#42;&#42;</li>
      * <li>Mercurial: &#42;&#42;/.hg, &#42;&#42;/.hg/&#42;&#42;</li>
      * <li>Git: &#42;&#42;/.git, &#42;&#42;/.git/&#42;&#42;</li>
      * <li>Bitkeeper: &#42;&#42;/BitKeeper, &#42;&#42;/BitKeeper/&#42;&#42;, &#42;&#42;/ChangeSet,
      * &#42;&#42;/ChangeSet/&#42;&#42;</li>
      * <li>Darcs: &#42;&#42;/_darcs, &#42;&#42;/_darcs/&#42;&#42;, &#42;&#42;/.darcsrepo,
      * &#42;&#42;/.darcsrepo/&#42;&#42;&#42;&#42;/-darcs-backup&#42;, &#42;&#42;/.darcs-temp-mail
      * </ul>
      *
      * @since 3.0.0
      */
     @Parameter(defaultValue = "true")
     protected boolean addDefaultExcludes;
 
     /**
      * <p>
      * List of plexus components hint which implements
      * {@link MavenResourcesFiltering#filterResources(MavenResourcesExecution)}. They will be executed after the
      * resources copying/filtering.
      * </p>
      *
      * @since 2.4
      */
     @Parameter
     private List<String> mavenFilteringHints;
 
     /**
      * @since 2.4
      */
     private List<MavenResourcesFiltering> mavenFilteringComponents = new ArrayList<>();
 
     /**
      * stop searching endToken at the end of line
      *
      * @since 2.5
      */
     @Parameter(defaultValue = "false")
     private boolean supportMultiLineFiltering;
 
     /**
      * Support filtering of filenames folders etc.
      *
      * @since 3.0.0
      */
     @Parameter(defaultValue = "false")
     private boolean fileNameFiltering;
 
     /**
      * You can skip the execution of the plugin if you need to. Its use is NOT RECOMMENDED, but quite convenient on
      * occasion.
      *
      * @since 3.0.0
      */
     @Parameter(property = "maven.resources.skip", defaultValue = "false")
     private boolean skip;
 
     /**
      * {@inheritDoc}
      */
     public void execute() throws MojoExecutionException {
         if (isSkip()) {
             getLog().info("Skipping the execution.");
             return;
         }
 
         if (StringUtils.isBlank(encoding) && isFilteringEnabled(getResources())) {
             getLog().warn("File encoding has not been set, using platform encoding "
                     + Charset.defaultCharset().displayName()
                     + ". Build is platform dependent!");
             getLog().warn("See https://maven.apache.org/general.html#encoding-warning");
         }
 
         try {
             List<String> combinedFilters = getCombinedFiltersList();
 
             MavenResourcesExecution mavenResourcesExecution = new MavenResourcesExecution(
                     getResources(),
                     getOutputDirectory(),
                     project,
                     encoding,
                     combinedFilters,
                     Collections.emptyList(),
                     session);
 
             mavenResourcesExecution.setEscapeWindowsPaths(escapeWindowsPaths);
 
             // never include project build filters in this call, since we've already accounted for the POM build filters
             // above, in getCombinedFiltersList().
             mavenResourcesExecution.setInjectProjectBuildFilters(false);
 
             mavenResourcesExecution.setEscapeString(escapeString);
             mavenResourcesExecution.setChangeDetection(getChangeDetection());
             mavenResourcesExecution.setIncludeEmptyDirs(includeEmptyDirs);
             mavenResourcesExecution.setSupportMultiLineFiltering(supportMultiLineFiltering);
             mavenResourcesExecution.setFilterFilenames(fileNameFiltering);
             mavenResourcesExecution.setAddDefaultExcludes(addDefaultExcludes);
 
             // Handle subject of MRESOURCES-99
             Properties additionalProperties = addSeveralSpecialProperties();
             mavenResourcesExecution.setAdditionalProperties(additionalProperties);
 
             // if these are NOT set, just use the defaults, which are '${*}' and '@'.
             mavenResourcesExecution.setDelimiters(delimiters, useDefaultDelimiters);
 
             // Handle MRESOURCES-171
             mavenResourcesExecution.setPropertiesEncoding(propertiesEncoding);
 
             if (nonFilteredFileExtensions != null) {
                 mavenResourcesExecution.setNonFilteredFileExtensions(nonFilteredFileExtensions);
             }
             mavenResourcesFiltering.filterResources(mavenResourcesExecution);
 
             executeUserFilterComponents(mavenResourcesExecution);
         } catch (MavenFilteringException e) {
             throw new MojoExecutionException(e.getMessage(), e);
         }
     }
 
     private ChangeDetection getChangeDetection() {
         if (changeDetection != null) {
             switch (changeDetection) {
                 case "content":
                     return ChangeDetection.CONTENT;
                 case "timestamp":
                     return ChangeDetection.TIMESTAMP;
                 case "timestamp+content":
                     return ChangeDetection.TIMESTAMP_AND_CONTENT;
                 case "always":
                     return ChangeDetection.ALWAYS;
                 case "never":
                     return ChangeDetection.NEVER;
                 default:
                     throw new IllegalArgumentException("Invalid value for changeDetection: " + changeDetection);
             }
         } else if (overwrite) {
             return ChangeDetection.ALWAYS;
         } else {
             return ChangeDetection.CONTENT;
         }
     }
 
     /**
      * This solves https://issues.apache.org/jira/browse/MRESOURCES-99.<br/>
      * BUT:<br/>
      * This should be done different than defining those properties a second time, cause they have already being defined
      * in Maven Model Builder (package org.apache.maven.model.interpolation) via BuildTimestampValueSource. But those
      * can't be found in the context which can be got from the maven core.<br/>
      * A solution could be to put those values into the context by Maven core so they are accessible everywhere. (I'm
      * not sure if this is a good idea). Better ideas are always welcome.
      * <p>
      * The problem at the moment is that maven core handles usage of properties and replacements in
      * the model, but does not the resource filtering which needed some of the properties.
      *
      * @return the new instance with those properties.
      */
     private Properties addSeveralSpecialProperties() {
         String timeStamp = new MavenBuildTimestamp().formattedTimestamp();
         Properties additionalProperties = new Properties();
         additionalProperties.put("maven.build.timestamp", timeStamp);
         if (project.getBasedir() != null) {
             additionalProperties.put(
                     "project.baseUri",
                     project.getBasedir().getAbsoluteFile().toURI().toString());
         }
 
         return additionalProperties;
     }
 
     /**
      * @param mavenResourcesExecution {@link MavenResourcesExecution}
      * @throws MojoExecutionException  in case of wrong lookup.
      * @throws MavenFilteringException in case of failure.
      * @since 2.5
      */
     protected void executeUserFilterComponents(MavenResourcesExecution mavenResourcesExecution)
             throws MojoExecutionException, MavenFilteringException {
 
         if (mavenFilteringHints != null) {
             for (String hint : mavenFilteringHints) {
                 MavenResourcesFiltering userFilterComponent = mavenResourcesFilteringMap.get(hint);
                 if (userFilterComponent != null) {
                     getLog().debug("added user filter component with hint: " + hint);
                     mavenFilteringComponents.add(userFilterComponent);
                 } else {
                     throw new MojoExecutionException(
                             "User filter with hint `" + hint + "` requested, but not present. Discovered filters are: "
                                     + mavenResourcesFilteringMap.keySet());
                 }
             }
         } else {
             getLog().debug("no user filter components");
         }
 
         if (mavenFilteringComponents != null && !mavenFilteringComponents.isEmpty()) {
             getLog().debug("execute user filters");
             for (MavenResourcesFiltering filter : mavenFilteringComponents) {
                 filter.filterResources(mavenResourcesExecution);
             }
         }
     }
 
     /**
      * @return The combined filters.
      */
     protected List<String> getCombinedFiltersList() {
         if (filters == null || filters.isEmpty()) {
             return useBuildFilters ? buildFilters : null;
         } else {
             List<String> result = new ArrayList<>();
 
             if (useBuildFilters && buildFilters != null && !buildFilters.isEmpty()) {
                 result.addAll(buildFilters);
             }
 
             result.addAll(filters);
 
             return result;
         }
     }
 
     /**
      * Determines whether filtering has been enabled for any resource.
      *
      * @param theResources The set of resources to check for filtering, may be <code>null</code>.
      * @return <code>true</code> if at least one resource uses filtering, <code>false</code> otherwise.
      */
     private boolean isFilteringEnabled(Collection<Resource> theResources) {
         if (theResources != null) {
             for (Resource resource : theResources) {
                 if (resource.isFiltering()) {
                     return true;
                 }
             }
         }
         return false;
     }
 
     /**
      * @return {@link #resources}
      */
     public List<Resource> getResources() {
         return resources;
     }
 
     /**
      * @param resources set {@link #resources}
      */
     public void setResources(List<Resource> resources) {
         this.resources = resources;
     }
 
     /**
      * @return {@link #outputDirectory}
      */
     public File getOutputDirectory() {
         return outputDirectory;
     }
 
     /**
      * @param outputDirectory the output folder.
      */
     public void setOutputDirectory(File outputDirectory) {
         this.outputDirectory = outputDirectory;
     }
 
     /**
      * @return {@link #overwrite}
      */
     public boolean isOverwrite() {
         return overwrite;
     }
 
     /**
      * @param overwrite true to overwrite false otherwise.
      */
     public void setOverwrite(boolean overwrite) {
         this.overwrite = overwrite;
     }
 
     /**
      * @return {@link #includeEmptyDirs}
      */
     public boolean isIncludeEmptyDirs() {
         return includeEmptyDirs;
     }
 
     /**
      * @param includeEmptyDirs true/false.
      */
     public void setIncludeEmptyDirs(boolean includeEmptyDirs) {
         this.includeEmptyDirs = includeEmptyDirs;
     }
 
     /**
      * @return {@link #filters}
      */
     public List<String> getFilters() {
         return filters;
     }
 
     /**
      * @param filters The filters to use.
      */
     public void setFilters(List<String> filters) {
         this.filters = filters;
     }
 
     /**
      * @return {@link #delimiters}
      */
     public LinkedHashSet<String> getDelimiters() {
         return delimiters;
     }
 
     /**
      * @param delimiters The delimiters to use.
      */
     public void setDelimiters(LinkedHashSet<String> delimiters) {
         this.delimiters = delimiters;
     }
 
     /**
      * @return {@link #useDefaultDelimiters}
      */
     public boolean isUseDefaultDelimiters() {
         return useDefaultDelimiters;
     }
 
     /**
      * @param useDefaultDelimiters true to use {@code ${*}}
      */
     public void setUseDefaultDelimiters(boolean useDefaultDelimiters) {
         this.useDefaultDelimiters = useDefaultDelimiters;
     }
 
     /**
      * @return {@link #skip}
      */
     public boolean isSkip() {
         return skip;
     }
 }