You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: search_facets.rb
    path of file: ./repos/picky/server/lib/picky
    
    the code of the file until where you have to start completion: module Picky

  class Search

    # Returns a list/hash of filtered facets.
    # 
    # Params
    #   category: The category whose facets to return.
    # 
    # Options
    #   counts: Whether you want counts (returns a Hash) or not (returns an Array). (Default true)
    #   at_least: A minimum count a facet needs to have (inclusive). (Default 1)
    #   filter: A query to filter the facets with(no_args).
    #
    # Usage:
    #   search.facets :name, filter: 'surname:peter', at_least: 2
    #
    def facets category_identifier, options = {}
      # TODO Make it work. How should it work with multiple indexes?
      #
      raise "#{__method__} cannot be used on searches with more than 1 index yet. Sorry!" if indexes.size > 1
      index = indexes.first
      
      # Get index-specific facet counts.
      #
      counts = index.facets category_identifier, options
      
      # We're done if there is no filter.
      #
      return counts unless filter_query = options[:filter]
      
      # Pre-tokenize query token category.
      #
      predefined_categories = [index[category_identifier]]
      
      # Pre-tokenize key token â€“ replace text bel
    
    def facets category_identifier, options = {}
      # TODO Make it work. How should it work with multiple indexes?
      #
      raise "#{__method__} cannot be used on searches with more than 1 index yet. Sorry!" if indexes.size > 1
      index = indexes.first
      
      # Get index-specific facet counts.
      #
      counts = index.facets category_identifier, options
      
      # We're done if there is no filter.
      #
      return counts unless filter_query = options[:filter]
      
      # Pre-tokenize query token category.
      #
      predefined_categories = [index[category_identifier]]
      
      # Pre-tokenize key token â€“ replace text below.
      # Note: The original is not important.
      #
      # TODO Don't use predefined. Perhaps do:
      # key_token = Query::Token.new ''
      # key_token.predefined_categories = [index[category_identifier]]
      #
      empty = @symbol_keys ? :'' : ''
      key_token = Query::Token.new empty, nil, predefined_categories
      
      # Pre-tokenize filter for reuse.
      #
      tokenized_filter_query = tokenized filter_query, false
      tokenized_filter_query.tokens.push key_token
      
      # Extract options.
      #
      no_counts = options[:counts] == false
      minimal_counts = options[:at_least] || 1 # Default needs at least one.
      
      # Get actual counts.
      #
      if no_counts
        facets_without_counts counts, minimal_counts, tokenized_filter_query, options do |last_text|
          key_token.text = last_text # TODO Why is this necessary?
        end
      else
        facets_with_counts counts, minimal_counts, tokenized_filter_query, key_token.text, options do |last_text|
          key_token.text = last_text # TODO Why is this necessary?
        end
      end
    end
    def facets_without_counts counts, minimal_counts, tokenized_filter_query, last_token_text, options = {}
      counts.inject([]) do |result, (key, _)|
        # Replace only the key token text because that
        # is the only information that changes in between
        # queries.
        #
        # Note: DOes not use replace anymore.
        #
        yield key
        
        # Calculate up to 1000 facets using unique to show correct facet counts.
        # TODO Redesign and deoptimize the whole process.
        #
        total = search_with(tokenized_filter_query, 1000, 0, nil, true).total
        
        next result unless total >= minimal_counts
        result << key
      end
    end
    def facets_with_counts counts, minimal_counts, tokenized_filter_query, last_token_text, options = {}
      counts.inject({}) do |result, (key, _)|
        # Replace only the key token text because that
        # is the only information that changes in between
        # queries.
        #
        yield key
        
        # Calculate up to 1000 facets using unique to show correct facet counts.
        # TODO Redesign and deoptimize the whole process.
        #
        total = search_with(tokenized_filter_query, 1000, 0, nil, true).total
        
        next result unless total >= minimal_counts
        result[key] = total
        result
      end
    end

  end