;;; yow.el --- generate random zippyisms

;; Copyright (C) 1985, 1987 Free Software Foundation, Inc.

;; Maintainer: FSF
;; Keywords: games

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to
;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

;;; Commentary:

;; Important pinheaddery for GNU Emacs.
;; Expects file emacs/etc/yow.lines to be in ITS-style LINS format
;;  (ie strings terminated by ascii 0 characters.  Leading whitespace ignored)
;; Everything up to the first \000 is a comment.

;;; Code:

; Randomize the seed in the random number generator.
(random t)

;;;###autoload
(defun yow (&optional n interactive)
  "Return or display a Zippy quotation."
  (interactive "P\np")
  (if (null yow-vector)
      (setq yow-vector (snarf-yows)))
  (cond (n (setq n (prefix-numeric-value n)))
	((>= (setq n (random (length yow-vector))) 0))
	(t (setq n (- n))))
  (let ((yow (aref yow-vector n)))
    (cond ((not interactive)
	   yow)
	  ((not (string-match "\n" yow))
	   (delete-windows-on (get-buffer-create "*Help*"))
	   (message "%s" yow))
	  (t
	   (message "Yow!")
	   (with-output-to-temp-buffer "*Help*"
	     (princ yow))))))

(defvar yow-vector nil "Pertinent pinhead statements")
(defun snarf-yows (&optional file)
  (save-excursion
    (let ((buf (generate-new-buffer " yow"))
	  (result '())
	  (cursor-in-echo-area t))
      (message "Am I CONSING yet?...")
      (set-buffer buf)
      (insert-file-contents (or file
				(expand-file-name "yow.lines" data-directory)))
      (search-forward "\0")
      (while (progn (skip-chars-forward " \t\n\r\f") (not (eobp)))
	(let ((beg (point)))
	  (search-forward "\0")
	  (setq result (cons (buffer-substring beg (1- (point)))
			     result))))
      (kill-buffer buf)
      (message "I have SEEN the CONSING!!" (length result))
      (apply 'vector (nreverse result)))))

; Yowza!! Feed zippy quotes to the doctor. Watch results.
; fun, fun, fun. Entertainment for hours...
;
; written by Kayvan Aghaiepour

;;;###autoload
(defun psychoanalyze-pinhead ()
  "Zippy goes to the analyst."
  (interactive)
  (doctor)				; start the psychotherapy
  (if (null yow-vector)
      (setq yow-vector (snarf-yows)))
  (message "")
  (switch-to-buffer "*doctor*")
  (sit-for 0)
  (while (not (input-pending-p))
    (insert-string (yow))
    (sit-for 0)
    (doctor-ret-or-read 1)
    (doctor-ret-or-read 1)))

(provide 'yow)

;;; yow.el ends here