require 'search_lingo/parsers/mdy'

module SearchLingo
  module Parsers # :nodoc:
    class DateParser
      include MDY

      def initialize(table, column, modifier = nil, **options)
        @table    = table
        @column   = column
        @prefix   = %r{#{modifier}:\s*} if modifier

        post_initialize **options
      end

      attr_reader :table, :column, :prefix

      # This implementation is specific to ActiveRecord::Base#where semantics.
      # Explore an agnostic implementation or rename the DateParser class (and
      # its descendants) to indicate that it is ActiveRecord-centric. If going
      # the latter route, provide a Sequel-specific implementation as well.
      def call(token)
        token.match /\A#{prefix}(?<date>#{US_DATE})\z/ do |m|
          date = parse m[:date]
          [:where, { table => { column => date } }] if date
        end
      end

      def post_initialize(**) # :nodoc:
      end

      def inspect # :nodoc:
        '#<%s:0x%x @table=%s @column=%s @prefix=%s>' %
          [self.class, object_id << 1, table.inspect, column.inspect, prefix.inspect]
      end
    end
  end
end