require_relative '../dencli'

class DenCli::CMD
	attr_reader :parent, :name, :desc, :exe, :completion

	def initialize parent, name, desc, exe
		raise "Proc expected, instead of: #{exe.inspect}"  unless Proc === exe
		@parent, @name, @desc, @exe = parent, name, desc, exe
		completion {|*a| [] }
	end

	def _full_cmd( post) parent._full_cmd [@name]+post end
	def full_cmd() _full_cmd [] end
	def call( *a) @exe.call *a end
	def help() "#{parent.full_cmd.join ' '} #{name}\n#{    desc}" end

	def complete( *pre, str) @completion.call *pre, str end

	def completion &exe
		@completion = exe
		self
	end

	def inspect
		"#<%s:0x%x %s @name=%p @desc=%p @parent=<%s:0x%x %s> @exe=<arity=%d>>" % [
			self.class.name, self.object_id, self.full_cmd,
			@name, @desc, @parent.class.name, @parent.class.object_id, @parent.full_cmd,
			@exe.arity
		]
	end
end