(in-package :cl-zk)

(defun make-clos-field (name)
  (let ((keyword-name (values (alexandria:make-keyword name))))
    `(,name :accessor ,name :initarg ,keyword-name)))

(defun writer-for-type (fieldspec stream)
  (let ((name (first fieldspec))
        (type (second fieldspec)))
    (ccase type
      (int `(write-int ,name ,stream)))))

(defmacro define-message (name superclasses fields)
  (let ((names (mapcar #'car fields))
        (value-sym (gensym))
        (stream-sym (gensym)))
    `(progn
       (defclass ,name ,superclasses
         ,(mapcar #'make-clos-field names))
       (defmethod encode-value ((,value-sym ,name) ,stream-sym)
         (with-slots ,names ,value-sym
           ,@(mapcar (lambda (p)
                       (writer-for-type p stream-sym)) fields))))))

(define-message connect-request ()
  ((protocol-version int)
   (last-zxid-seen bigint)
   (timeout int)
   (session-id bigint)
   (password byte-array)))

(define-message connect-request