/*
    * The contents of this file are subject to the terms of the Common Development and
    * Distribution License (the License). You may not use this file except in compliance with the
    * License.
    *
    * You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
    * specific language governing permission and limitations under the License.
    *
    * When distributing Covered Software, include this CDDL Header Notice in each file and include
   * the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
   * Header, with the fields enclosed by brackets [] replaced by your own identifying
   * information: "Portions copyright [year] [name of copyright owner]".
   *
   * Copyright 2012-2014 ForgeRock AS
   */
  
  package org.forgerock.doc.maven.pre;
  
  import static org.twdata.maven.mojoexecutor.MojoExecutor.element;
  import static org.twdata.maven.mojoexecutor.MojoExecutor.name;
  
  import org.apache.commons.io.FileUtils;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.forgerock.doc.maven.AbstractDocbkxMojo;
  import org.twdata.maven.mojoexecutor.MojoExecutor;
  
  import java.io.File;
  import java.io.IOException;
  import java.net.URL;
  
  /**
   * Prepare fonts for use with Apache FOP.
   */
  public final class Fop {
  
      /**
       * The Mojo that holds configuration and related methods.
       */
      private AbstractDocbkxMojo m;
  
      /**
       * The Executor to run docbkx-tools.
       */
      private final Executor executor;
  
      /**
       * Constructor setting the Mojo that holds the configuration.
       *
       * @param mojo The Mojo that holds the configuration.
       */
      public Fop(final AbstractDocbkxMojo mojo) {
          m = mojo;
          this.executor = new Executor();
      }
  
      /**
       * Prepare fonts for use with Apache FOP.
       *
       * @throws MojoExecutionException Failed to prepare to use FOP.
       */
      public void execute() throws MojoExecutionException {
          executor.copyFonts();
          executor.generateFontMetrics();
      }
  
      /**
       * Return a fonts element that includes all the custom fonts.
       *
       * @param fontDir Directory containing the custom fonts.
       * @return Fonts element.
       */
      public static MojoExecutor.Element getFontsElement(final String fontDir) {
          return element(
                  name("fonts"),
                  element(name("font"),
                          element(name("name"), "DejaVuSans"),
                          element(name("style"), "normal"),
                          element(name("weight"), "normal"),
                          element(name("embedFile"), fontDir + "/DejaVuSans.ttf"),
                          element(name("metricsFile"), fontDir + "/DejaVuSans-metrics.xml")),
                  element(name("font"),
                          element(name("name"), "DejaVuSans"),
                          element(name("style"), "normal"),
                          element(name("weight"), "bold"),
                          element(name("embedFile"), fontDir + "/DejaVuSansCondensed-Bold.ttf"),
                          element(name("metricsFile"), fontDir + "/DejaVuSansCondensed-Bold-metrics.xml")),
                  element(name("font"),
                          element(name("name"), "DejaVuSans"),
                          element(name("style"), "italic"),
                          element(name("weight"), "normal"),
                          element(name("embedFile"), fontDir + "/DejaVuSans-Oblique.ttf"),
                          element(name("metricsFile"), fontDir + "/DejaVuSans-Oblique-metrics.xml")),
                  element(name("font"),
                          element(name("name"), "DejaVuSans"),
                          element(name("style"), "italic"),
                          element(name("weight"), "bold"),
                          element(name("embedFile"), fontDir + "/DejaVuSansCondensed-BoldOblique.ttf"),
                          element(name("metricsFile"), fontDir + "/DejaVuSansCondensed-BoldOblique-metrics.xml")),
                  element(name("font"),
                         element(name("name"), "DejaVuSansMono"),
                         element(name("style"), "normal"),
                         element(name("weight"), "normal"),
                         element(name("embedFile"), fontDir + "/DejaVuSansMono.ttf"),
                         element(name("metricsFile"), fontDir + "/DejaVuSansMono-metrics.xml")),
                 element(name("font"),
                         element(name("name"), "DejaVuSansMono"),
                         element(name("style"), "normal"),
                         element(name("weight"), "bold"),
                         element(name("embedFile"), fontDir + "/DejaVuSansMono-Bold.ttf"),
                         element(name("metricsFile"), fontDir + "/DejaVuSansMono-Bold-metrics.xml")),
                 element(name("font"),
                         element(name("name"), "DejaVuSansMono"),
                         element(name("style"), "italic"),
                         element(name("weight"), "normal"),
                         element(name("embedFile"), fontDir + "/DejaVuSansMono-Oblique.ttf"),
                         element(name("metricsFile"), fontDir + "/DejaVuSansMono-Oblique-metrics.xml")),
                 element(name("font"),
                         element(name("name"), "DejaVuSansMono"),
                         element(name("style"), "italic"),
                         element(name("weight"), "bold"),
                         element(name("embedFile"), fontDir + "/DejaVuSansMono-BoldOblique.ttf"),
                         element(name("metricsFile"), fontDir + "/DejaVuSansMono-BoldOblique-metrics.xml")),
                 element(name("font"),
                         element(name("name"), "DejaVuSerif"),
                         element(name("style"), "normal"),
                         element(name("weight"), "normal"),
                         element(name("embedFile"), fontDir + "/DejaVuSerif.ttf"),
                         element(name("metricsFile"), fontDir + "/DejaVuSerif-metrics.xml")),
                 element(name("font"),
                         element(name("name"), "DejaVuSerif"),
                         element(name("style"), "normal"),
                         element(name("weight"), "bold"),
                         element(name("embedFile"), fontDir + "/DejaVuSerifCondensed-Bold.ttf"),
                         element(name("metricsFile"), fontDir + "/DejaVuSerifCondensed-Bold-metrics.xml")),
                 element(name("font"),
                         element(name("name"), "DejaVuSerif"),
                         element(name("style"), "italic"),
                         element(name("weight"), "normal"),
                         element(name("embedFile"), fontDir + "/DejaVuSerif-Italic.ttf"),
                         element(name("metricsFile"), fontDir + "/DejaVuSerif-Italic-metrics.xml")),
                 element(name("font"),
                         element(name("name"), "DejaVuSerif"),
                         element(name("style"), "italic"),
                         element(name("weight"), "bold"),
                         element(name("embedFile"), fontDir + "/DejaVuSerifCondensed-BoldItalic.ttf"),
                         element(name("metricsFile"), fontDir + "/DejaVuSerifCondensed-BoldItalic-metrics.xml")));
     }
 
     /**
      * Enclose methods to run plugins.
      */
     class Executor extends MojoExecutor {
 
         /**
          * Copy fonts for use when generating FO output.
          *
          * @throws MojoExecutionException Failed to copy fonts.
          */
         public void copyFonts() throws MojoExecutionException {
             String[] fonts = {"/fonts/DejaVuSans-Oblique.ttf",
                 "/fonts/DejaVuSans.ttf",
                 "/fonts/DejaVuSansCondensed-Bold.ttf",
                 "/fonts/DejaVuSansCondensed-BoldOblique.ttf",
                 "/fonts/DejaVuSansMono-Bold.ttf",
                 "/fonts/DejaVuSansMono-BoldOblique.ttf",
                 "/fonts/DejaVuSansMono-Oblique.ttf",
                 "/fonts/DejaVuSansMono.ttf",
                 "/fonts/DejaVuSerif-Italic.ttf",
                 "/fonts/DejaVuSerif.ttf",
                 "/fonts/DejaVuSerifCondensed-Bold.ttf",
                 "/fonts/DejaVuSerifCondensed-BoldItalic.ttf"};
 
             for (String font : fonts) {
                 final URL source = getClass().getResource(font);
                 final File destination = new File(
                         m.getBuildDirectory(), font.replaceAll("/", File.separator));
                 try {
                     FileUtils.copyURLToFile(source, destination);
                 } catch (IOException e) {
                     throw new MojoExecutionException(
                             "Failed to copy file: " + font + ". " + e.getMessage());
                 }
             }
         }
 
         /**
          * Generate font metrics files.
          *
          * @throws MojoExecutionException Failed to generate font metrics.
          */
         public void generateFontMetrics() throws MojoExecutionException {
 
             final String fontsDir = m.path(m.getFontsDirectory());
 
             executeMojo(
                     plugin(
                             groupId("com.agilejava.docbkx"),
                             artifactId("docbkx-fop-support"),
                             version(m.getDocbkxVersion())),
                     goal("generate"),
                     configuration(
                             element(name("ansi"), m.useAnsi()),
                             element(name("sourceDirectory"), fontsDir),
                             element(name("targetDirectory"), fontsDir)),
                     executionEnvironment(m.getProject(), m.getSession(), m.getPluginManager()));
         }
     }
 }