;;; oni-termux.el --- Termux-specific configuration  -*- lexical-binding: t; -*-

;; Copyright (C) 2019  Tom Willemse

;; Author: Tom Willemse <tom@ryuslash.org>
;; Keywords: local
;; Version: 2021.1123.003341
;; Package-Requires: (oni-alert oni-tui alert-termux)

;; 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 <https://www.gnu.org/licenses/>.

;;; Commentary:

;; Configuration specific to running in Termux.

;; This configuration shows the battery power in the mode-line, since
;; the devices running Emacs in Termux will most likely always have a
;; battery.

;;; Code:

(require 'alert)
;;(require 'alert-termux)
(require 'json)
(require 'oni-tui)

(defun oni-termux--battery-status ()
  "Get battery status information using `termux-battery status'.

The following %-sequences are provided:
%h Health
%p Percentage
%L Plugged
%B Status
%d Temperature"
  (let ((default-directory user-emacs-directory)
        (info (with-temp-buffer
                (call-process "termux-battery-status" nil t)
                (goto-char (point-min))
                (json-read))))
    (list
     (cons ?h (alist-get 'health info "N/A"))
     (cons ?p (number-to-string (alist-get 'percentage info -1)))
     (cons ?P (alist-get 'plugged info "N/A"))
     (cons ?B (alist-get 'status info "N/A"))
     (cons ?t (number-to-string (alist-get 'temperature info -1))))))

(defun oni-termux--load-alert-termux ()
  "Load ‘alert-termux’.
This can’t be done by a require because it appears that
‘alert-termux’ gets added to the load path and loaded after this
library, so use this function in ‘after-init-hook’ instead."
  (load-library "alert-termux"))

;; To keep the byte-compiler happy I use a `defvar' here.
(defvar battery-status-function #'oni-termux--battery-status)

;; The battery library needs to be loaded after the battery variables
;; have been set, otherwise loading it will produce the error that
;; access is denied to /sys/class/power_supply.
(require 'battery)

(setq battery-mode-line-format "%p%%")

(setq alert-default-style 'termux)

(add-hook 'after-init-hook #'oni-termux--load-alert-termux)

(display-battery-mode)

(provide 'oni-termux)
;;; oni-termux.el ends here