module ReportsHelper
  def render_new_element(hide)
    render partial: 'reports/elements/new_element.html.erb',
          locals: { hide: hide }
  end

  def render_report_element(element, provided_locals = nil)
    children_html = ''.html_safe

    # First, recursively render element's children
    if element.comments? || element.project_header?
      # Render no children
    elsif element.result?
      # Special handling for result comments
      if element.has_children?
        children_html.safe_concat render_new_element(true)
        element.children.each do |child|
          children_html
            .safe_concat render_report_element(child, provided_locals)
        end
      else
        children_html.safe_concat render_new_element(false)
      end
    else
      if element.has_children?
        element.children.each do |child|
          children_html.safe_concat render_new_element(false)
          children_html
            .safe_concat render_report_element(child, provided_locals)
        end
      end
      children_html.safe_concat render_new_element(false)
    end

    file_name = element.type_of
    if element.type_of.in? %w(step result_asset result_table result_text)
      file_name = "my_module_#{element.type_of.singularize}"
    end
    view = "reports/elements/#{file_name}_element.html.erb"

    locals = provided_locals.nil? ? {} : provided_locals.clone
    locals[:children] = children_html

    # ReportExtends is located in config/initializers/extends/report_extends.rb

    ReportElement.type_ofs.keys.each do |type|
      next unless element.public_send("#{type}?")
      element.element_references.each do |el_ref|
        locals[el_ref.class.name.underscore.to_sym] = el_ref
      end
      locals[:order] = element
                       .sort_order if type.in? ReportExtends::SORTED_ELEMENTS
    end

    (render partial: view, locals: locals).html_safe
  end

  # "Hack" to omit file preview URL because of WKHTML issues
  def report_image_asset_url(asset)
    prefix = ''
    if ENV['PAPERCLIP_STORAGE'].present? &&
       ENV['MAIL_SERVER_URL'].present? &&
       ENV['PAPERCLIP_STORAGE'] == 'filesystem'
      prefix = ENV['MAIL_SERVER_URL']
    end
    if !prefix.empty? &&
       !prefix.include?('http://') &&
       !prefix.include?('https://')
      prefix = "http://#{prefix}"
    end
    url = prefix + asset.url(:medium, timeout: Constants::URL_LONG_EXPIRE_TIME)
    image_tag(url)
  end

  # "Hack" to load Glyphicons css directly from the CDN
  # site so they work in report
  def bootstrap_cdn_link_tag
    specs = Gem.loaded_specs['bootstrap-sass']
    return '' unless specs.present?
    stylesheet_link_tag("http://netdna.bootstrapcdn.com/bootstrap/" \
                        "#{specs.version.version}/css/bootstrap.min.css",
                        media: 'all')
  end

  def font_awesome_cdn_link_tag
    stylesheet_link_tag(
      'https://maxcdn.bootstrapcdn.com/font-awesome' \
      '/4.6.3/css/font-awesome.min.css'
    )
  end

  def step_status_label(step)
    if step.completed
      style = 'success'
      text = t('protocols.steps.completed')
    else
      style = 'default'
      text = t('protocols.steps.uncompleted')
    end
    "<span class=\"label label-#{style}\">#{text}</span>".html_safe
  end
end