module SearchHelper

  MAP_SEARCH_LIMIT = 2000
  LIST_SEARCH_LIMIT = 20
  BLOCKS_SEARCH_LIMIT = 18
  MULTIPLE_SEARCH_LIMIT = 8
  DistFilt = 200
  DistBoost = 50

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

  SortOptions = {
    :products => ActiveSupport::OrderedHash[ :none, {:label => _('Relevance')},
      :more_recent, {:label => _('More recent'), :solr_opts => {:sort => 'updated_at desc, score desc'}},
      :name, {:label => _('Name'), :solr_opts => {:sort => 'name_sortable asc'}},
      :closest, {:label => _('Closest to me'), :if => proc{ logged_in? && (profile=current_user.person).lat && profile.lng },
        :solr_opts => {:sort => "geodist() asc",
          :latitude => proc{ current_user.person.lat }, :longitude => proc{ current_user.person.lng }}},
    ],
    :events => ActiveSupport::OrderedHash[ :none, {:label => _('Relevance')},
      :name, {:label => _('Name'), :solr_opts => {:sort => 'name_sortable asc'}},
    ],
    :articles => ActiveSupport::OrderedHash[ :none, {:label => _('Relevance')},
      :name, {:label => _('Name'), :solr_opts => {:sort => 'name_sortable asc'}},
      :more_recent, {:label => _('More recent'), :solr_opts => {:sort => 'updated_at desc, score desc'}},
    ],
    :enterprises => ActiveSupport::OrderedHash[ :none, {:label => _('Relevance')},
      :name, {:label => _('Name'), :solr_opts => {:sort => 'name_sortable asc'}},
    ],
    :people => ActiveSupport::OrderedHash[ :none, {:label => _('Relevance')},
      :name, {:label => _('Name'), :solr_opts => {:sort => 'name_sortable asc'}},
    ],
    :communities => ActiveSupport::OrderedHash[ :none, {:label => _('Relevance')},
      :name, {:label => _('Name'), :solr_opts => {:sort => 'name_sortable asc'}},
    ],
  }

  # FIXME remove it after search_controler refactored
  include EventsHelper

  def multiple_search?
    ['index', 'category_index'].include?(params[:action]) or @results.size > 1
  end

  def map_search?
    !@empty_query and !multiple_search? and params[:display] == 'map'
  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_results(map_capable = false)
    if map_capable and map_search?
      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_map_list_button
    button(:search, params[:display] == 'map' ? _('Display in list') : _('Display in map'),
           params.merge(:display => (params[:display] == 'map' ? 'list' : 'map')),
           :class => "map-toggle-button" )
  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 facets_menu(asset, _facets)
    @asset_class = asset_class(asset)
    @facets = _facets
    render(:partial => 'facets_menu')
  end

  def facets_unselect_menu(asset)
    @asset_class = asset_class(asset)
    render(:partial => 'facets_unselect_menu')
  end

  def facet_javascript(input_id, facet, array)
    array = [] if array.nil?
    hintText = _('Type in an option')
    text_field_tag('facet['+input_id+']', '', :id => input_id) +
      javascript_tag("jQuery.TokenList(jQuery('##{input_id}'), #{array.to_json},
        {searchDelay: 0, permanentDropdown: true, theme: 'facet', dontAdd: true, preventDuplicates: true,
        #{jquery_token_input_messages_json(hintText)}});")
  end

  def facet_link_html(facet, params, value, label, count)
    params = params ? params.dup : {}
    has_extra = label.kind_of?(Array)
    link_label = has_extra ? label[0] : label
    id = facet[:solr_field].to_s
    params[:facet] ||= {}
    params[:facet][id] ||= {}
    params[:page] = {} if params[:page]

    selected = facet[:label_id].nil? ? params[:facet][id] == value : params[:facet][id][facet[:label_id]].to_a.include?(value)

    if count > 0
      url = params.merge(:facet => params[:facet].merge(
        id => facet[:label_id].nil? ? value : params[:facet][id].merge( facet[:label_id] => params[:facet][id][facet[:label_id]].to_a | [value] )
      ))
    else
      # preserve others filters and change this filter
      url = params.merge(:facet => params[:facet].merge(
        id => facet[:label_id].nil? ? value : { facet[:label_id] => value }
      ))
    end

    content_tag 'div', link_to(link_label, url, :class => 'facet-result-link-label') +
        content_tag('span', (has_extra ? label[1] : ''), :class => 'facet-result-extra-label') +
        (count > 0 ? content_tag('span', " (#{count})", :class => 'facet-result-count') : ''),
      :class => 'facet-menu-item' + (selected ? ' facet-result-link-selected' : '')
  end

  def facet_selecteds_html_for(environment, klass, params)
    def name_with_extra(klass, facet, value)
      name = klass.facet_result_name(facet, value)
      name = name[0] + name[1] if name.kind_of?(Array)
      name
    end

    ret = []
    params = params.dup
    params[:facet].each do |id, value|
      facet = klass.facet_by_id(id.to_sym)
      next unless facet
      if value.kind_of?(Hash)
        label_hash = facet[:label].call(environment)
        value.each do |label_id, value|
          facet[:label_id] = label_id
          facet[:label] = label_hash[label_id]
          value.to_a.each do |value|
            ret << [facet[:label], name_with_extra(klass, facet, value),
              params.merge(:facet => params[:facet].merge(id => params[:facet][id].merge(label_id => params[:facet][id][label_id].to_a.reject{ |v| v == value })))]
          end
        end
      else
        ret << [klass.facet_label(facet), name_with_extra(klass, facet, value),
          params.merge(:facet => params[:facet].reject{ |k,v| k == id })]
      end
    end

    ret.map do |label, name, url|
      content_tag('div', content_tag('span', label, :class => 'facet-selected-label') +
        content_tag('span', name, :class => 'facet-selected-name') +
        link_to('', url, :class => 'facet-selected-remove', :title => 'remove facet'), :class => 'facet-selected')
    end.join
  end

  def order_by(asset)
    options = SortOptions[asset].map do |name, options|
      next if options[:if] and ! instance_eval(&options[:if])
      [_(options[:label]), name.to_s]
    end.compact

    content_tag('div', _('Sort results by ') +
      select_tag(asset.to_s + '[order]', options_for_select(options, params[:order_by] || 'none'),
        {:onchange => "window.location = jQuery.param.querystring(window.location.href, { 'order_by' : this.options[this.selectedIndex].value})"}),
      :class => "search-ordering")
  end

  def label_total_found(asset, total_found)
    labels = {
      :products => _("%s products offers found"),
      :articles => _("%s articles found"),
      :events => _("%s events found"),
      :people => _("%s people found"),
      :enterprises => _("%s enterprises found"),
      :communities => _("%s communities found"),
    }
    content_tag('span', labels[asset] % total_found,
      :class => "total-pages-found") if labels[asset]
  end

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

  def asset_table(asset)
    asset_class(asset).table_name
  end

end