module Ingo

# File lib/ingo.rb, line 8
def asciidoc_link(reference, text)
  "link:#{reference}[#{text}]"
end

# File lib/ingo.rb, line 39
def convert_directory(base_directory)
  Dir.glob(File.join(base_directory, 'docs/**/*.adoc')) do |document|
    lines = File.readlines(document)
    lines += list_of_topics(document)
    ad_doc = Asciidoctor::Document.new(lines, header_footer: true, safe: 'unsafe')
    html = ad_doc.convert
    FileUtils.mkdir_p(File.join(base_directory, 'output'))
    File.open(File.join(base_directory, 'output', output_file_name(document)), 'w+') do |file|
      file.puts html
    end
  end
end

# File lib/ingo.rb, line 52
  def create_index_files(base_directory)
    topics = populate_topics(base_directory)
    meta_index = <<END
= Index

END
    meta_index = write_indexes(base_directory, meta_index, topics)
    write_meta_index(base_directory, meta_index)
  end

# File lib/ingo.rb, line 20
def list_of_topics(document)
  lines = []
  lines << ''
  lines << 'Topics:'
  lines << ''
  asciidoctor_document = Asciidoctor.load_file(document)
  if asciidoctor_document.attributes['topics']
    topics = asciidoctor_document.attributes['topics'].split(', ')
    topics.each do |t|
      lines << "#{asciidoc_link(t + '-index.html', t)} "
    end
  else
    puts "#{document} has no topics"
  end
  lines << ''

  lines
end

# File lib/ingo.rb, line 12
def output_file_name(input_file_name)
  File.basename(input_file_name, '.*') + '.html'
end

# File lib/ingo.rb, line 62
def populate_topics(base_directory)
  topics = Hash.new
  Dir.glob base_directory + '/docs/**/*.adoc' do |doc|
    asciidoctor_document = Asciidoctor.load_file doc
    if asciidoctor_document.attributes['topics']
      this_topics = asciidoctor_document.attributes['topics'].split(", ")
      this_topics.each do |t|
        if topics[t].nil?
          topics[t] = []
        end
        topics[t] << output_file_name(doc)
      end
    end
  end
  topics
end

# File lib/ingo.rb, line 104
def run(base_directory)
  convert_directory(base_directory)
  create_index_files(base_directory)
end

# File lib/ingo.rb, line 16
def topics(document)
  Asciidoctor.load_file(document).attributes['topics'].split(', ')
end

# File lib/ingo.rb, line 79
  def write_indexes(base_directory, meta_index, topics)
    topics.each do |t, docs|
      meta_index += "* #{asciidoc_link(t + '-index.html', t)}\n"
      index = <<END
== Index of #{t}

END
      docs.each do |doc|
        index += "* #{asciidoc_link(doc, File.basename(doc, '.*'))}\n"
      end
      html = Asciidoctor.convert(index, header_footer: true, safe: 'unsafe')
      File.open(base_directory + '/output/' + t + '-index.html', 'w') do |f|
        f.write(html)
      end
    end
    meta_index
  end

# File lib/ingo.rb, line 97
def write_meta_index(base_directory, meta_index)
  html = Asciidoctor.convert(meta_index, header_footer: true, safe: 'unsafe')
  File.open(base_directory + '/output/index.html', 'w') do |f|
    f.write(html)
  end
end