/*
    * SPDX-FileCopyrightText: Copyright (c) 2011-2026 Yegor Bugayenko
    * SPDX-License-Identifier: MIT
    */
   package com.qulice.checkstyle;
   
   import java.io.File;
   import java.io.IOException;
   import java.nio.charset.StandardCharsets;
  import org.apache.commons.io.FileUtils;
  import org.cactoos.text.IoCheckedText;
  import org.cactoos.text.Joined;
  
  /**
   * Builder of {@code LICENSE.txt} content.
   *
   * @since 0.4
   */
  public final class License {
  
      /**
       * The text.
       */
      private String[] lines;
  
      /**
       * EOL.
       */
      private String eol;
  
      /**
       * Package name.
       */
      private String pkg;
  
      /**
       * Directory for package-info.java.
       */
      private File directory;
  
      /**
       * Ctor.
       */
      public License() {
          this.pkg = "foo";
      }
  
      /**
       * Use this EOL.
       *
       * @param txt What to use as end-of-line character
       * @return This object
       */
      public License withEol(final String txt) {
          this.eol = txt;
          return this;
      }
  
      /**
       * Use this text (lines).
       *
       * @param lns The lines to use
       * @return This object
       */
      public License withLines(final String... lns) {
          this.lines = new String[lns.length];
          System.arraycopy(lns, 0, this.lines, 0, lns.length);
          return this;
      }
  
      /**
       * Use this package name.
       *
       * @param name The name of package
       * @return This object
       */
      public License withPackage(final String name) {
          this.pkg = name;
          return this;
      }
  
      /**
       * Save package-info.java into this folder.
       *
       * @param dir The folder to save to
       * @return This object
       */
      public License savePackageInfo(final File dir) {
          this.directory = dir;
          return this;
      }
  
      /**
       * Make a file.
       *
       * @return The location of LICENSE.txt
       * @throws IOException If something wrong happens inside
       */
      public File file() throws IOException {
         final File license = File.createTempFile("LICENSE", ".txt");
         FileUtils.forceDeleteOnExit(license);
         FileUtils.writeStringToFile(
             license,
             new IoCheckedText(new Joined(this.eol, this.lines)).asString(),
             StandardCharsets.UTF_8
         );
         if (this.directory != null) {
             this.makePackageInfo(this.directory);
         }
         return license;
     }
 
     private void makePackageInfo(final File dir) throws IOException {
         final StringBuilder body = new StringBuilder(100);
         body.append("/*").append(this.eol);
         for (final String line : this.lines) {
             body.append(" *");
             if (!line.isEmpty()) {
                 body.append(' ').append(line);
             }
             body.append(this.eol);
         }
         body.append(" */").append(this.eol)
             .append("/**").append(this.eol)
             .append(" * Hm...").append(this.eol)
             .append(" */").append(this.eol)
             .append("package ").append(this.pkg)
             .append(';').append(this.eol);
         FileUtils.writeStringToFile(
             new File(dir, "package-info.java"),
             body.toString(),
             StandardCharsets.UTF_8
         );
     }
 }