module ApplicationHelper
  def title(*args)
    res = content_tag :h1, class: 'page-title' do
      if args.first.is_a?(Symbol) && (args[1].respond_to?(:model_name) || args[1].class.respond_to?(:model_name))
        model = args[1].respond_to?(:model_name) ? args[1] : args[1].class
        if args.first == :index
          t('action.index.label', models: model.model_name.human_plural)
        else
          t("action.#{args.first}.label", model: model.model_name.human)
        end
      else
        args.first
      end
    end
    content_for :page_title, res
    res
  end

  # overwrite i18n l, to handle nil values
  def l(*args)
    return '' unless args.first
    super(*args)
  end

  def are_you_sure?(record)
    t('helpers.links.are_you_sure')
  end

  def active_list
    active_list_object
  end

  def application_title
    'Qwaiter'
  end

  # Helper for displaying HTML currency values
  def currency(amount, opts={})
    amount ||= 0.0
    amount = amount.to_f
    #prefix = case company.currency
    #         when 'GBP' then '£ '
    #         when 'USD' then '$ '
    #         else '€ '
    #         end
    prefix = '€ '
    return (prefix + ("%.2f" % amount)).html_safe

    # Rails native is ambiguous since is uses translation hashes 
    options = {:unit => '€'}.merge(opts)
    number_to_currency(amount, options)
  end
  def list_open?
    active_list_id.present?
  end

  def active_list_id
    current_user.try(:active_list_id)
  end

  def no_content_given(model)
    t('helpers.list.no_records')
  end

  def slider_image
    image_tag('spinner.gif')
  end

  def show_boolean(bool)
    t("general.boolean.boolean_#{bool.present? ? 'yes' : 'no'}")
  end

  def facebook_link
    link_to 'Facebook', 'https://www.facebook.com/Qwaiter', target: :_blank
  end
  def twitter_link
    link_to 'Twitter', 'https://www.twitter.com/Qwaiter', target: :_blank
  end

  # Add a script call to be executed when the dom is loaded.
  # When called without a script it will return the total added script content
  #  - onload_javascript 'var a=1'
  #  - onload_javascript 'var b=3'
  #  = onload_javascript #=> var a=1;var b=3
  def onload_javascript(script = nil)
    if block_given?
      script = script.to_s
      value = nil
      buffer = with_output_buffer {  value = yield }
      script += (buffer.presence || value).to_s
    end
    script = script.call if script.respond_to?(:call)
    script.present? ? (@onload_javascripts ||= []) << script : (@onload_javascripts || []).join(';')
  end

  def mustache_template(template)
    render(template, handlers: [:mustache])
  end

  def top_bar(options = {}, &block)
    title = options[:title]
    title = title.present? ? content_tag(:h3, t("user.#{title}"), class: 'title', data: {t: title}) : ''
    content_tag :div, class: 'top-button-bar' do
      content_tag :div, class: 'button-bar-inner' do
        content_tag :div, class: 'button-bar-content' do
          (title + capture(&block)).html_safe
        end
      end
    end
  end

end