18F/hhs-acf-uc-dashboard

module Admin
  module Attributes
    class CapacityData
      attr_reader :params

      def initialize(params)
        @params = params
      end

      def valid?
        integer_error_fields.empty?
      end

      def validation_errors
        integer_error_fields.map { |value_key|
          ValidationError.new(value_key, 'must be 0 or greater')
        }
      end

      def normalized_status
        return 'locked' if params[:status] == 'locked'
        'unlocked'
      end

      def update_attributes(date)
        {
          date:         date,
          funded:     params[:funded],
          reserve:      params[:reserve],
          activated:    params[:activated],
          unavailable:  params[:unavailable],
          status:       normalized_status
        }
      end

      def self.value_fields
        [:funded, :reserve, :activated, :unavailable]
      end

      private

      def integer_error_fields
        self.class.value_fields.select { |value_key|
          !is_positive_integer?(params[value_key].to_i)
        }
      end

      def is_positive_integer?(value)
        value >= 0
      end
    end
  end
end