module Ratis

  class Itinerary

    attr_accessor :co2_auto, :co2_transit
    attr_accessor :final_walk_dir, :legs
    attr_accessor :reduced_fare, :regular_fare
    attr_accessor :transit_time

    def self.where(conditions)
      date = conditions.delete :date
      time = conditions.delete :time
      minimize = conditions.delete(:minimize).to_s.upcase

      origin_lat = conditions.delete(:origin_lat).to_f
      origin_long = conditions.delete(:origin_long).to_f
      destination_lat = conditions.delete(:destination_lat).to_f
      destination_long = conditions.delete(:destination_long).to_f

      raise ArgumentError.new('You must provide a date DD/MM/YYYY') unless DateTime.strptime(date, '%d/%m/%Y') rescue false
      raise ArgumentError.new('You must provide a time as 24-hour HHMM') unless DateTime.strptime(time, '%H%M') rescue false
      raise ArgumentError.new('You must provide a conditions of T|X|W to minimize') unless ['T', 'X', 'W'].include? minimize

      raise ArgumentError.new('You must provide an origin latitude') unless Ratis.valid_latitude? origin_lat
      raise ArgumentError.new('You must provide an origin longitude') unless Ratis.valid_longitude? origin_long
      raise ArgumentError.new('You must provide an destination latitude') unless Ratis.valid_latitude? destination_lat
      raise ArgumentError.new('You must provide an destination longitude') unless Ratis.valid_longitude? destination_long

      Ratis.all_conditions_used? conditions

      response = Request.get 'Plantrip',
        'Date' => date, 'Time' => time, 'Minimize' => minimize,
        'Originlat' => origin_lat, 'Originlong' => origin_long,
        'Destinationlat' => destination_lat, 'Destinationlong' => destination_long

      return [] unless response.success?

      response.to_array(:plantrip_response, :itin).map do |itinerary|
        atis_itinerary = Itinerary.new
        atis_itinerary.co2_auto = itinerary[:co2auto].to_f
        atis_itinerary.co2_transit = itinerary[:co2transit].to_f
        atis_itinerary.final_walk_dir = itinerary[:finalwalkdir]
        atis_itinerary.reduced_fare = itinerary[:reducedfare].to_f
        atis_itinerary.regular_fare = itinerary[:regularfare].to_f
        atis_itinerary.transit_time = itinerary[:transittime].to_i
        atis_itinerary.legs = itinerary.to_array :legs, :leg

        atis_itinerary
      end

    end

  end

end