# frozen_string_literal: true

module Rcmdr
  # Subcommands should extend this module once they are instantiated
  # so that the Subcommand instance has access to all necessary
  # class methods for this subcommand to work.
  module Subcommand
    class << self
      def extended(mod)
        mod.singleton_class.delegate :command_namespace, :commands,
          :command_add, :command_subcommand_add, :command_prompt, :help, to: mod.class
      end
    end

    # Subcommand-specific instance methods.
    #
    # Define Subcommand-specific method equivalents of the Command class
    # methods needed to make this Subcommand instance unique.

    # def command_namespace(namespace = nil)
    #   return @command_namespace || name if namespace.nil?

    #   @command_namespace = namespace
    # end

    # Subcommands can be used by any Command, so the :command_parent needs
    # to be unique to this Subcommand instance.
    def command_parent(parent = nil)
      return @command_prompt if parent.nil?

      @command_prompt = parent
    end

    def command_namespaces(namespaces = [])
      command_parent&.command_namespaces(namespaces)

      namespaces << command_namespace
      namespaces
    end
  end
end