class DivvyBike

# File lib/divvy_bike.rb, line 15
def self.all   
        get_data
end

# File lib/divvy_bike.rb, line 19
def self.get(args)
        # Only valid arguments allowed
                args.each do |k_arg, v_arg| 
                if !VALID_ARGS.has_key?(k_arg)
                        return "#{k_arg} is not a valid argument"
                end
        end

        stations = get_data
        filtered_stations = []

        stations.each do |station|
                if args.all? { |k_arg, v_arg| station[VALID_ARGS[k_arg]] == v_arg }
                        filtered_stations.push(station) 
                end
        end

        return filtered_stations
end

# File lib/divvy_bike.rb, line 39
def self.has_available_bikes
        stations = get_data
        stations.select { |station| station["availableBikes"] > 0 }
end

# File lib/divvy_bike.rb, line 44
def self.has_available_docks
        stations = get_data
        stations.select { |station| station["availableDocks"] > 0 }
end

# File lib/divvy_bike.rb, line 51
def self.get_data
        if Time.now > @@response_date+60
              response = Net::HTTP.get(URI 'http://www.divvybikes.com/stations/json')
              response_json = JSON.parse(response)
              @@stations = response_json['stationBeanList']
              @@response_date = Time.parse(response_json['executionTime'])
        end
        return @@stations
end