module Callbacks
  class BasicMultiple
    include AASM

    def initialize(options={})
      @fail_event_guard = options[:fail_event_guard]
      @fail_transition_guard = options[:fail_transition_guard]
      @log = options[:log]
      reset_data
    end

    def reset_data
      @data = []
    end

    def data
      @data.join(' ')
    end

    aasm(:left) do
      state :open, :initial => true,
        :before_enter => :before_enter_open,
        :enter        => :enter_open,
        :after_enter  => :after_enter_open,
        :before_exit  => :before_exit_open,
        :exit         => :exit_open,
        :after_exit   => :after_exit_open

      state :closed,
        :before_enter => :before_enter_closed,
        :enter        => :enter_closed,
        :after_enter  => :after_enter_closed,
        :before_exit  => :before_exit_closed,
        :exit         => :exit_closed,
        :after_exit   => :after_exit_closed

      event :left_close, :before => :before_event, :after => :after_event, :guard => :event_guard do
        transitions :to => :closed, :from => [:open], :guard => :transition_guard, :after => :after_transition
      end

      event :left_open, :before => :before_event, :after => :after_event do
        transitions :to => :open, :from => :closed
      end
    end

    def log(text)
      @data << text
      puts text if @log
    end

    def aasm_write_state(*args); log("aasm_write_state(#{args.inspect})"); true; end

    def before_enter_open;    log('before_enter_open');   end
    def enter_open;           log('enter_open');          end
    def before_exit_open;     log('before_exit_open');    end
    def after_enter_open;     log('after_enter_open');    end
    def exit_open;            log('exit_open');           end
    def after_exit_open;      log('after_exit_open');     end

    def before_enter_closed;  log('before_enter_closed'); end
    def enter_closed;         log('enter_closed');        end
    def before_exit_closed;   log('before_exit_closed');  end
    def exit_closed;          log('exit_closed');         end
    def after_enter_closed;   log('after_enter_closed');  end
    def after_exit_closed;    log('after_exit_closed');   end

    def event_guard;          log('event_guard');         !@fail_event_guard;      end
    def transition_guard;     log('transition_guard');    !@fail_transition_guard; end

    def after_transition;     log('after_transition');    end

    def before_event;         log('before_event');        end
    def after_event;          log('after_event');         end
  end
end