module Natour

# File lib/natour/convert.rb, line 11
def convert(filename, out_dir: nil, out_file: nil, overwrite: false,
            backend: 'pdf', draft: false, draft_backend: nil, image_maxdim: 16000)
  backend = if draft
              draft_backend || backend
            else
              backend
            end

  doc = Asciidoctor.load_file(
    filename,
    backend: backend,
    safe: :unsafe,
    standalone: true,
    attributes: {
      'pdf-theme' => 'natour',
      'pdf-themesdir' => "#{__dir__}/data/themes",
      'pdf-fontsdir' => "#{__dir__}/data/fonts"
    }
  )

  dir = Pathname(filename).dirname
  out_dir = Pathname(out_dir || dir)
  out_file = Pathname(
    out_file || "#{doc.attr('docname')}#{doc.attr('outfilesuffix')}"
  )

  if draft
    doc.find_by(context: :image).each do |node|
      target = node.attr('target')
      image = Image.load_file(dir.join(target).to_s)
      node.title = "#{node.title} [#{[target, image.date_time].compact.join('|')}]"
    end
  end

  %w[
    revdate
    docdate
    doctime
    docdatetime
    localdate
    localtime
    localdatetime
  ].each do |attr_name|
    date_time = Time.parse(doc.attr(attr_name))
    if attr_name.end_with?('datetime')
      doc.set_attr(attr_name, date_time.strftime('%d.%m.%Y %H:%M:%S'))
    elsif attr_name.end_with?('date')
      doc.set_attr(attr_name, date_time.strftime('%d.%m.%Y'))
    elsif attr_name.end_with?('time')
      doc.set_attr(attr_name, date_time.strftime('%H:%M:%S'))
    end
  end

  if backend == 'pdf'
    Dir.mktmpdir do |tmp_dir|
      tmp_dir = Pathname(tmp_dir)

      title_logo_image = doc.attr('title-logo-image')
      if title_logo_image
        target = title_logo_image[/^image:{1,2}(.*?)\[(.*?)\]$/, 1]
        image = Image.load_file(dir.join(target).to_s).autorotate.shrink_to(image_maxdim)
        new_target = tmp_dir.join("title_logo_image_#{Pathname(target).basename}").to_s
        image.save_as(new_target)
        doc.set_attr('title-logo-image', title_logo_image.gsub(target, new_target))
      end

      doc.find_by(context: :image).each.with_index do |node, index|
        target = node.attr('target')
        image = Image.load_file(dir.join(target).to_s).autorotate.shrink_to(image_maxdim)
        new_target = tmp_dir.join("image#{index}_#{Pathname(target).basename}").to_s
        image.save_as(new_target)
        node.set_attr('target', new_target)
      end

      FileUtils.mkdir_p(out_dir)
      mode = File::WRONLY | File::CREAT | File::TRUNC | File::BINARY
      mode |= File::EXCL unless overwrite
      File.open(out_dir.join(out_file), mode) do |file|
        doc.write(doc.convert, file)
      end
    end
  else
    FileUtils.mkdir_p(out_dir)
    mode = File::WRONLY | File::CREAT | File::TRUNC
    mode |= File::EXCL unless overwrite
    File.open(out_dir.join(out_file), mode) do |file|
      doc.write(doc.convert, file)
    end
  end
end

# File lib/natour/create.rb, line 4
def create(dir, out_dir: nil, out_file: nil, overwrite: false,
           track_formats: %i[gpx fit], create_map: true, map_layers: [], adoc_author: nil)
  out_dir = Pathname(out_dir || dir)
  out_file = Pathname(out_file || "#{Pathname(dir).realpath.basename}.adoc")
  reports = Report.load_directory(
    dir, track_formats: track_formats, create_map: create_map, map_layers: map_layers
  )
  reports.each.with_index(1) do |report, index|
    filename = if index < 2
                 out_dir.join(out_file)
               else
                 out_dir.join("#{out_file.basename('.*')} (#{index})#{out_file.extname}")
               end
    report.save_adoc(filename, overwrite: overwrite, author: adoc_author)
  end
end