module SearchHelper

  MAP_SEARCH_LIMIT = 2000
  LIST_SEARCH_LIMIT = 20
  BLOCKS_SEARCH_LIMIT = 24
  MULTIPLE_SEARCH_LIMIT = 8

  SEARCHES = ActiveSupport::OrderedHash[
    :articles, _('Contents'),
    :enterprises, _('Enterprises'),
    :people, _('People'),
    :communities, _('Communities'),
    :products, _('Products and Services'),
    :events, _('Events'),
  ]

  FILTER_TRANSLATION = {
    'more_popular' => _('More popular'),
    'more_active' => _('More active'),
    'more_recent' => _('More recent'),
    'more_comments' => _('More comments')
  }

  # FIXME remove it after search_controler refactored
  include EventsHelper

  def multiple_search?(searches=nil)
    ['index', 'category_index'].include?(params[:action]) || (searches && searches.size > 1)
  end

  def map_search?(searches=nil)
    !multiple_search?(searches) && params[:display] == 'map'
  end

  def asset_class(asset)
    asset.to_s.singularize.camelize.constantize
  end

  def search_page_title(title, category = nil)
    title = "<h1>" + title
    title += ' - <small>' + category.name + '</small>' if category
    title + "</h1>"
  end

  def category_context(category, url)
    content_tag('div', category.full_name + _(', ') +
        link_to(_('search in all categories'),
          url.merge(:category_path => [], :action => (params[:action] == 'category_index' ? 'index' : params[:action]) )),
      :align => 'center', :class => 'search-category-context') if category
  end

  def display?(asset, mode)
    defined?(asset_class(asset)::SEARCH_DISPLAYS) && asset_class(asset)::SEARCH_DISPLAYS.include?(mode.to_s)
  end

  def display_results(searches=nil, asset=nil)
    if display?(asset, :map) && map_search?(searches)
      partial = 'google_maps'
      klass = 'map'
    else
      partial = 'display_results'
      klass = 'list'
    end

    content_tag('div', render(:partial => partial), :class => "map-or-list-search-results #{klass}")
  end

  def display_filter(asset, display)
    asset = :articles if asset == :tag
    if display?(asset, display)
      display
    else
      asset_class(asset).default_search_display
    end
  end

  def city_with_state(city)
    if city and city.kind_of?(City)
      s = city.parent
      if s and s.kind_of?(State) and s.acronym
        city.name + ', ' + s.acronym
      else
        city.name
      end
    else
      nil
    end
  end

  def display_selector(asset, display, float = 'right')
    display = nil if display.blank?
    display ||= asset_class(asset).default_search_display
    if [display?(asset, :map), display?(asset, :compact), display?(asset, :full)].select {|option| option}.count > 1
      compact_link = display?(asset, :compact) ? (display == 'compact' ? _('Compact') : link_to(_('Compact'), params.merge(:display => 'compact'))) : nil
      map_link = display?(asset, :map) ? (display == 'map' ? _('Map') : link_to(_('Map'), params.merge(:display => 'map'))) : nil
      full_link = display?(asset, :full) ? (display == 'full' ? _('Full') : link_to(_('Full'), params.merge(:display => 'full'))) : nil
      content_tag('div', 
        content_tag('strong', _('Display')) + ': ' + [compact_link, map_link, full_link].compact.join(' | ').html_safe,
        :class => 'search-customize-options'
      )
    end
  end

  def filter_selector(asset, filter, float = 'right')
    klass = asset_class(asset)
    if klass::SEARCH_FILTERS.count > 1
      options = options_for_select(klass::SEARCH_FILTERS.map {|f| [FILTER_TRANSLATION[f], f]}, filter)
      url_params = url_for(params.merge(:filter => 'FILTER'))
      onchange = "document.location.href = '#{url_params}'.replace('FILTER', this.value)"
      select_field = select_tag(:filter, options, :onchange => onchange)
      content_tag('div',
        content_tag('strong', _('Filter')) + ': ' + select_field,
        :class => "search-customize-options"
      )
    end
  end

  def filter_title(asset, filter)
    {
      'articles_more_recent' => _('More recent contents from network'),
      'articles_more_popular' => _('More viewed contents from network'),
      'articles_more_comments' => _('Most commented contents from network'),
      'people_more_recent' => _('More recent people from network'),
      'people_more_active' => _('More active people from network'),
      'people_more_popular' => _('More popular people from network'),
      'communities_more_recent' => _('More recent communities from network'),
      'communities_more_active' => _('More active communities from network'),
      'communities_more_popular' => _('More popular communities from network'),
      'enterprises_more_recent' => _('More recent enterprises from network'),
      'enterprises_more_active' => _('More active enterprises from network'),
      'enterprises_more_popular' => _('More popular enterprises from network'),
      'products_more_recent' => _('Highlights'),
    }[asset.to_s + '_' + filter].to_s
  end

end