module Delayer

# File lib/delayer/error.rb, line 15
def self.StateError(state)
  case state
  when :run
    AlreadyRunningError
  when :done
    AlreadyExecutedError
  when :cancel
    AlreadyCanceledError
  else
    TooLate
  end
end

# File lib/delayer.rb, line 21
def generate_class(options = {})
  Class.new do
    include ::Delayer
    @expire = options[:expire] || 0
    if options.has_key?(:priority)
      @priorities = options[:priority].to_a.freeze
      @default_priority = options[:default]
    else
      @priorities = [:normal]
      @default_priority = :normal
    end
  end
end

# File lib/delayer/extend.rb, line 28
def self.included(klass)
  klass.class_eval do
    extend Extend
  end
end

# File lib/delayer.rb, line 35
def method_missing(fn, *args, **kwrest, &proc)
  if kwrest.empty?
    (@default ||= generate_class).__send__(fn, *args, &proc)
  else
    (@default ||= generate_class).__send__(fn, *args, **kwrest, &proc)
  end
end

# File lib/delayer/extend.rb, line 34
def initialize(priority = self.class.instance_eval { @default_priority }, *_args, delay: 0, &proc)
  self.class.validate_priority priority
  @priority = priority
  if delay == 0
    @procedure = Procedure.new(self, &proc)
  else
    @procedure = DelayedProcedure.new(self, delay: delay, &proc)
  end
end

# File lib/delayer/extend.rb, line 49
def cancel
  @procedure.cancel
  self
end