attachment :file, uploader: FileUploader

module SelectedAction
  def select_action_by_params params
    # skip action table lookups for current revision
    rev_id = params[:rev_id]
    super unless rev_id && rev_id == last_content_action_id
  end

  def last_content_action_id
    # find action id from content (saves lookups)
    db_content.to_s.split(/[\/\.]/)[1]
  end

end
include SelectedAction

format do
  view :source do |args|
    card.attachment.url
  end

  view :core do |args|
    handle_source args do |source|
      card_url source
    end
  end

  def handle_source args
    source = _render_source args
    source ? yield( source ) : ''
  rescue
    'File Error'
  end
end



format :file do

  view :core do |args|                                    # returns send_file args.  not in love with this...
    if format = card.attachment_format( params[:format] ) # this means we only support known formats.  dislike.
      if params[:explicit_file] and r = controller.response
        r.headers["Expires"] = 1.year.from_now.httpdate
        #r.headers["Cache-Control"] = "public"            # currently using default "private", because proxy servers could block needed permission checks
      end

  #      elsif ![format, 'file'].member? params[:format]  # formerly supported redirecting to correct file format
  #        return redirect_to( request.fullpath.sub( /\.#{params[:format]}\b/, '.' + format ) ) #card.attachment.url(style) )

      file = selected_file_version
      [ file.path,
        {
          type: file.content_type,
          filename:  "#{card.cardname.safe_key}#{file.extension}",
          x_sendfile: true,
          disposition: (params[:format]=='file' ? 'attachment' : 'inline' )
        }
      ]
    else
      _render_not_found
    end
  end

  def selected_file_version
    card.attachment
  end

end


format :html do

  view :core do |args|
    handle_source args do |source|
      "<a href=\"#{source}\">Download #{ showname args[:title] }</a>"
    end
  end

  view :editor do |args|
    file_chooser args
  end


  def preview  args
    ''
  end

  view :preview_editor, tags: :unknown_ok do |args|
    <<-HTML
      <div class="chosen-file">
        <input type="hidden" name="cached_upload" value="#{card.selected_action_id}">
        <table role="presentation" class="table table-striped"><tbody class="files">
          <tr class="template-download fade in">
            <td>
              <span class="preview">
                #{preview(args)}
              </span>
            </td>
            <td>
              <p class="name">
                #{card.original_filename}
              </p>
            </td>
            <td>
              <span class="size">#{number_to_human_size(card.attachment.size)}</span>
            </td>
            <td class="pull-right">
              <button class="btn btn-danger delete cancel-upload" data-type="DELETE">
                <i class="glyphicon glyphicon-trash"></i>
                <span>Delete</span>
              </button>
            </td>
          </tr></tbody>
        </table>
      </div>
    HTML
  end

  def file_chooser args
    <<-HTML
      <div class="choose-file">
        #{preview(args)}
        <span class="btn btn-success fileinput-button">
            <i class="glyphicon glyphicon-cloud-upload"></i>
            <span>
                #{card.new_card? ? 'Add' : 'Replace'} #{card.attachment_name}...
            </span>
             #{file_field card.attachment_name, class: 'file-upload slotter'}
        </span>
      </div>
      <div id="progress" class="progress" style="display: none;">
        <div class="progress-bar progress-bar-success" style="width: 0%;"></div>
      </div>
      <div class="chosen-file"></div>
    HTML
  end

end