;;; -*- lexical-binding: t -*-
;;
;; this file:
;;   https://dataswamp.org/~incal/emacs-init/survivor.el

(require 'cl-lib)
(require 'math-incal)

(defun five-mean (one two three four five)
  (move-end-of-line nil)
  (insert
    (format " [mean %s%%]"
            (round (mean-value (list one two three four five))) )))

(defun read-votes ()
  (interactive)
  (let*((vts-str  (thing-at-point 'symbol t))
        (vts-strs (split-string vts-str "-"))
        (vts      (cl-map 'list #'string-to-number vts-strs))
        (str      (apply #'votes vts)) )
    (move-end-of-line nil)
    (insert " " str) ))

(defun votes (&rest votes)
  (let*((vts (sort votes #'>=))
        (num (apply #'+ vts))
        (win (car vts))
        (per (percent win num t)) )
    per) )

(defun cost-at-day (day)
  (apply #'+ (number-sequence 1 day)) )

;; (cost-at-day 48) ; 1176 AUS
;; (cost-at-day 39) ;  780 USA old era
;; (cost-at-day 28) ;  406 SWE
;; (cost-at-day 27) ;  378 USA new era
;; (cost-at-day  1) ;    1
;; (cost-at-day  0) ;    0

(provide 'survivor)