module Spiffy

# File lib/spiffy.rb, line 7
def self.markup_to_html(markup_file, css_file: nil, template_file: nil, output_html: true, output_pdf: false, output_dir: nil)
  markup_file_ext = File.extname(markup_file)
  markup_file_name = File.basename(markup_file, ".*")
  markup_file_directory = File.dirname(markup_file)
  markup = File.open(markup_file, "r:UTF-8", &:read)

  html = GitHub::Markup.render(markup_file, markup)
  
  if css_file
    css = File.open(css_file, "r:UTF-8", &:read)
  end

  if template_file
    template_ext = File.extname(template_file)
    template = File.open(template_file, "r:UTF-8", &:read)
    local_variables = {
      base_url: "file://#{File.absolute_path(markup_file_directory)}/",
      file: markup_file
    }
    html = case template_ext
           when ".erb"
             ERB.new(template).result do |section|
               case section; when :css; css; when :body, nil; html; end
             end
           when ".haml"
             engine = Haml::Engine.new(template)
             engine.render(Object.new, local_variables) do |section|
               case section; when :css; css; when :body, nil; html; end
             end
           else
             raise "Template file #{template_file} unsupported. Only .erb or .haml are supported."
           end
  end

  output_dir = File.join(output_dir, "") if output_dir
  output_dir = "#{output_dir}#{markup_file_directory}"
  FileUtils.mkdir_p(output_dir) unless File.directory?(output_dir)

  if output_html
    html_file = File.join(output_dir, "#{markup_file_name}.html")
    File.open(html_file, "w:UTF-8") { |f| f.write(html) }
  end

  if output_pdf
    pdf_file = File.join(output_dir, "#{markup_file_name}.pdf")
    pdf = PDFKit.new(html)
    pdf.stylesheets << css_file if css_file
    pdf.to_file(pdf_file)
  end
end