module SearchHelper

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

  FILTERS_TRANSLATIONS = {
    :order => _('Order'),
    :display => _('Display')
  }

  FILTERS_OPTIONS_TRANSLATION = {
    :order => {
      'more_popular' => _('More popular'),
      'more_active' => _('More active'),
      'more_recent' => _('More recent'),
      'more_comments' => _('More comments')
    },
    :display => {
      'map' => _('Map'),
      'full' => _('Full'),
      'compact' => _('Compact')
    }
  }

  COMMON_PROFILE_LIST_BLOCK = [
    :enterprises,
    :people,
    :communities
  ]

  # 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_FILTERS[:display]) && asset_class(asset)::SEARCH_FILTERS[:display].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 select_filter(name, options, default = nil)
    if options.size <= 1
      return
    else
      options = options.map {|option| [FILTERS_OPTIONS_TRANSLATION[name][option], option]}
      options = options_for_select(options, :selected => (params[name] || default))
      select_tag(name, options)
    end
  end

  def city_with_state_for_profile(p)
    city_with_state(p.region) || [p.city, p.state].compact.reject(&:blank?).join(', ')
  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 filters(asset)
    return if !asset
    klass = asset_class(asset)
    content_tag('div', klass::SEARCH_FILTERS.map do |name, options|
      default = klass.respond_to?("default_search_#{name}") ? klass.send("default_search_#{name}".to_s) : nil
      select_filter(name, options, default)
    end.join("\n"), :id => 'search-filters')
  end

  def assets_menu(selected)
    assets = @enabled_searches.keys
    #     Events is a search asset but do not have a good interface for
    #TODO searching. When this is solved we may add it back again to the assets
    #     menu.
    assets.delete(:events)
    content_tag('ul',
      assets.map do |asset|
        options = {}
        options.merge!(:class => 'selected') if selected.to_s == asset.to_s
        content_tag('li', asset_link(asset), options)
      end.join("\n"),
    :id => 'assets-menu')
  end

  def asset_link(asset)
    link_to(@enabled_searches[asset], "/search/#{asset}")
  end

  def assets_submenu(asset)
    return '' if @templates[asset].blank? || @templates[asset].length == 1
    options = @templates[asset].map {|template| [template.name, template.id]}
    options = options_for_select([[_('Choose a template'), nil]] + options, selected: (params[:template_id]))
    select_tag('template_id', options, :id => 'submenu')
  end

end