module NotificationsHelper
  include PeopleHelper
  include PostsHelper

  def object_link(note, actors)
    target_type = note.popup_translation_key
    actors_count = note.actors.size

    if note.instance_of?(Notifications::Mentioned)
      if post = note.linked_object
        translation(target_type, :actors => actors, :count => actors_count, :post_link => link_to(post_page_title(post), post_path(post)).html_safe)
      else
        t(note.deleted_translation_key, :actors => actors, :count => actors_count).html_safe
      end
    elsif note.instance_of?(Notifications::CommentOnPost) || note.instance_of?(Notifications::AlsoCommented) || note.instance_of?(Notifications::Reshared) || note.instance_of?(Notifications::Liked)
      if post = note.linked_object
        translation(target_type, :actors => actors, :count => actors_count, :post_author => h(post.author_name), :post_link => link_to(post_page_title(post), post_path(post), 'data-ref' => post.id, :class => 'hard_object_link').html_safe)
      else
        t(note.deleted_translation_key, :actors => actors, :count => actors_count).html_safe
      end
    else #Notifications:StartedSharing, etc.
      translation(target_type, :actors => actors, :count => actors_count)
    end
  end

  def translation(target_type, opts = {})
    {:post_author => nil}.merge!(opts)
    t("#{target_type}", opts).html_safe
  end

  def notification_people_link(note, people=nil)
    actors =people || note.actors
    number_of_actors = actors.size
    sentence_translations = {:two_words_connector => " #{t('notifications.index.and')} ", :last_word_connector => ", #{t('notifications.index.and')} " }
    actor_links = actors.collect{ |person|
      person_link(person, :class => 'hovercardable')
    }

    if number_of_actors < 4
      message = actor_links.to_sentence(sentence_translations)
    else
      first, second, third, *others = actor_links
      others_sentence = others.to_sentence(sentence_translations)
      if others.count == 1
        others_sentence = " #{t('notifications.index.and')} " + others_sentence
      end
      message = "#{first}, #{second}, #{third},"
      message += "<a class='more' href='#'> #{t('notifications.index.and_others', :count =>(number_of_actors - 3))}</a>"
      message += "<span class='hidden'> #{others_sentence} </span>"
    end
    message.html_safe
  end

  def notification_message_for(note)
    object_link(note, notification_people_link(note))
  end

  def the_day(date)
    date.split('-')[2].to_i
  end

  def the_month(date)
    I18n.l(Date.strptime(date, '%Y-%m-%d'), :format => '%B')
  end

  def the_year(date)
    date.split('-')[0].to_i
  end

  def locale_date(date)
    I18n.l(Date.strptime(date, '%Y-%m-%d'), :format => I18n.t('date.formats.fullmonth_day'))
  end

  def display_year?(year, date)
    unless year
      Date.current.year != the_year(date)
    else
      year != the_year(date)
    end
  end
end