# Ripple
class Ripple
  def initialize(value, unit = nil)
    @value = value
    @unit = unit
    @drop = convert_to_drop if @unit
  end

  def convert_to_drop
    case @unit
    when :xrp
      @value * 1_000_000
    when :drop
      @value
    else
      @value
    end
  end

  def to_xrp
    @drop / 1_000_000.0
  end
  alias to_coin to_xrp

  def to_drop
    @drop
  end

  def to_smallest
    to_drop
  end

  def smallest_to_coin
    @unit ||= :drop
    @drop = @value
    to_coin
  end

  def coin_to_smallest
    @unit ||= :xrp
    @drop = convert_to_drop
    to_smallest
  end
end