;;; FG42 --- The mighty editor for the emacsians -*- lexical-binding: t; -*-
;;
;; Copyright (c) 2010-2022 Sameer Rahmani <lxsameer@gnu.org>
;;
;; Author: Sameer Rahmani <lxsameer@gnu.org>
;; URL: https://gitlab.com/FG42/FG42
;; Version: 3.0.0
;;
;; This program 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 3 of the License, or
;; (at your option) any later version.
;;
;; This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
;;
;;; Commentary:
;;; Code:
(require 'fg42/modeline)
(require 'fg42/statusbar)


(defmacro fg42/percentage-face (value err warn)
  "Return the correct face with repect to VALUE and the given
thresholds ERR adn WARN"
  `(cond ((> ,value ,err) 'error) ((> ,value ,warn) 'warning) (t 'success)))

(defbar-unit fg42/statusbar-battery 30 "B--"
  (format "B%s"
          (string-trim
           (with-temp-buffer
             (insert-file-contents "/sys/class/power_supply/BAT0/capacity")
             (buffer-string)))))


(defbar-unit fg42/statusbar-memory 3 "M--S--"
  (let* ((struct (string-trim
                  (shell-command-to-string "free -k|tail -n 2|awk '{printf(\"%s,%s,\", $3, $2)}'")))
         (vals (mapcar #'cl-parse-integer (butlast (split-string struct ","))))
         ;; TODO: Check for division by zero
         (m (* 100  (/ (float(car vals)) (cadr vals))))
         ;; TODO: Check for division by zero
         (s (* 100  (/ (float(caddr vals)) (cadddr vals))))
         (x ))

    (format
     "M%sS%s"
     (propertize (format "%02d" m) 'face (fg42/percentage-face m 90 75))
     (propertize (format "%02d" s) 'face (fg42/percentage-face s 90 75)))))

;; The default modeline for FG42 that is compatible with
;; the FG42's status bar only
(defmode-line fg42/statusbar-default
  (if (display-graphic-p)
      (progn
        ;; We are in the graphical world
        (require 'all-the-icons)

        (list
         :brief (list
                 'fg42/statusbar-battery
                 'fg42/statusbar-memory
                 "|" '(buffer-name) "|" '(format-mode-line "%l:%c") "|" '(format-time-string "%m-%d %H:%M"))
         :long " "))
    ;; No GUI
    (list
     :brief (list)
     :long "")))


(provide 'fg42/modeline/statusbar-default)
;;; statusbar-default.el ends here