module CurationConcerns
  module Messages
    extend ActiveSupport::Concern

    # Borrowed from AbstractController so we can render html content tags
    attr_accessor :output_buffer
    include ActionView::Helpers::TagHelper
    include ActionView::Helpers::UrlHelper

    def success_subject
      I18n.t('curation_concerns.messages.success.subject')
    end

    def failure_subject
      I18n.t('curation_concerns.messages.failure.subject')
    end

    def single_success(id, file)
      content_tag :span, id: 'ss-' + id do
        [link_to_file(file), I18n.t('curation_concerns.messages.success.single')].join(' ').html_safe
      end
    end

    def multiple_success(id, files)
      content_tag :span, id: 'ss-' + id do
        [success_link(files), I18n.t('curation_concerns.messages.success.multiple.tag')].join(' ').html_safe
      end
    end

    def single_failure(id, file)
      content_tag :span, id: 'ss-' + id do
        [link_to_file(file), I18n.t('curation_concerns.messages.failure.single')].join(' ').html_safe
      end
    end

    def multiple_failure(id, files)
      content_tag :span, id: 'ss-' + id do
        [failure_link(files), I18n.t('curation_concerns.messages.failure.multiple.tag')].join(' ').html_safe
      end
    end

    # Double-quotes are replaced with single ones so this list can be included in a data block. Ex:
    #   <a href="#" data-content="<a href='#'>embedded link</a>" data-toggle="popover">Click me</a>
    def file_list(files)
      files.map { |fs| link_to_file(fs) }.join(', ').tr("\"", "'")
    end

    def link_to_file(file)
      link_to(file.to_s, Rails.application.class.routes.url_helpers.curation_concerns_file_set_path(file))
    end

    private

      def success_link(files)
        link_to I18n.t('curation_concerns.messages.success.multiple.link'), '#',
                data: { toggle: 'popover',
                        content: file_list(files).html_safe,
                        title: I18n.t('curation_concerns.messages.success.title') }
      end

      def failure_link(files)
        link_to I18n.t('curation_concerns.messages.failure.multiple.link'), '#',
                data: { toggle: 'popover',
                        content: file_list(files).html_safe,
                        title: I18n.t('curation_concerns.messages.failure.title') }
      end
  end
end