module Spina
  module ApplicationHelper

    def markdown(text)
      sha = Digest::SHA1.hexdigest(text.to_s)
      Rails.cache.fetch sha do
        renderer = Redcarpet::Render::HTML.new(hard_wrap: true, filter_html: false)
        options = {
          autolink: true,
          no_intra_emphasis: true,
          fenced_code_blocks: true,
          lax_spacing: true,
          strikethrough: true,
          superscript: true
        }
        html = Redcarpet::Markdown.new(renderer, options).render(text.to_s)

        html.gsub!(/\[vimeo\s+(\d*)\]/, '<figure class="video"><iframe src="http://player.vimeo.com/video/\1?portrait=0&title=0&byline=0" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe></figure>')
        html.gsub!(/\[button\s+(.*)\](.*)\[\/button\]/, '<a href="\1" class="button">\2</a>')
        html.html_safe
      end
    end

    def link_to_add_fields(name, f, association)
      new_object = f.object.send(association).klass.new
      id = new_object.object_id
      fields = f.fields_for(association, new_object, child_index: id) do |builder|
        render(association.to_s.singularize + "_fields", f: builder)
      end
      link_to(name, '#', class: "add_fields button button-primary button-link", data: {id: id, fields: fields.gsub("\n", ""), icon: '&'})
    end

    def current_account
      @current_account ||= Account.first
    end

    def image_tag_with_at2x(name_at_1x, options={})
      name_at_2x = name_at_1x.gsub(%r{\.\w+$}, '@2x\0')
      image_tag(name_at_1x, options.merge("data-at2x" => asset_path(name_at_2x)))
    end

    def error_explanation!(resource)
      return "" if resource.errors.empty?

      messages = resource.errors.full_messages.map { |msg| content_tag(:li, msg) }.join
      sentence = I18n.t("errors.messages.not_saved", count: resource.errors.count, resource: resource.class.model_name.human.downcase)

      html = <<-HTML
      <div id="error_explanation" class="notification notification-error" data-icon='m'>
        <p>#{sentence}</p>
        <ul>#{messages}</ul>
      </div>
      HTML

      html.html_safe
    end

    def captcha
      NegativeCaptcha.new(
        secret: Engine.config.NEGATIVE_CAPTCHA_SECRET,
        spinner: request.remote_ip,
        fields: [:email, :message, :name],
        params: params
      )
    end

  end
end