;;;; cl-scopes/csys/program - common and general csys program definitions

(defpackage :scopes/csys/program
  (:use :common-lisp)
  (:local-nicknames (:actor :scopes/core/actor)
                    (:csys :scopes/csys)
                    (:environ :scopes/csys/environ)
                    (:util :scopes/util))
  (:export #:basic-0 #:basic-1))

(in-package :scopes/csys/program)

;;;; basic-0: minimal recursive system

(defun basic-0 ()
  (csys:make-program
    (list '(:c00 :initial) (csys:std-proc :next (b0-next-zero))
          '(:e01 :initial) (csys:eff-proc)
          ':default (csys:std-proc))))

(defun b0-next-zero ()
  (lambda (msg scope) 
    (let ((self actor:*self*))
      (csys:send-create self :cat :e01 :connect :succ)
      (csys:send-create self :cat :s01 :loc "0-1" :connect :pred)
      (csys:send-connect self self :op (csys:multiply -1))
      ;; switch :active
      nil)))
 
;;;; basic-1: minimal cross-linked system

(defun basic-1 ()
  (csys:make-program
    (list '(:s00 :initial) (csys:std-proc :next (b1-next-zero))
          '(:s00 :basic) (csys:std-proc :next (b1-next-one))
          '(:e00 :default) (csys:eff-proc)
          ':default (csys:std-proc))))

(defun b1-next-zero ()
  (lambda (msg scope) 
    (let ((self actor:*self*))
      (csys:send-create self :cat :e00 :loc "1-0" :connect :succ)
      (csys:send-create self :cat :e00 :loc "1-1" :connect :succ :op (csys:multiply -1))
      (csys:send-create self :cat :s00 :loc "0-1" :stage :basic)
      ;; switch :active
      nil)))
 
(defun b1-next-one ()
  (lambda (msg scope) 
    (let ((self actor:*self*)
          (env (csys:environ scope)))
      (environ:send-connect env :to self :target '(:csys :e00 "1-0") 
                            :op (csys:multiply -1))
      (environ:send-connect env :to self :target '(:csys :e00 "1-1"))
      ;; switch :active
      nil)))