class EacRubyUtils::Enum::Value

def <=>(other)
  key <=> other.key
end

def apply
  define_constant
  define_class_method
  self
end

def class_method_name
  key.to_s
end

def constant_name
  class_method_name.upcase
end

def define_class_method
  the_value = self
  klass.define_singleton_method(class_method_name) { the_value.value }
end

def define_constant
  klass.const_set(constant_name, value)
end

def initialize(klass, key, args, &block)
  @klass = klass
  @key = ::EacRubyUtils::Inflector.variableize(key.to_s).to_sym
  @args = args
  @block = block
end

def uncached_value
  klass.new(key, *value_args)
end

def value
  @value ||= uncached_value
end

def value_args
  r = if block
        block.call
      elsif args.count == 1 && args.first.is_a?(::Enumerable)
        args.first
      else
        args
      end
  r.is_a?(::Enumerable) ? r : [r]
end