;;; jao-spt.el --- Access to the spotify-tui CLI     -*- lexical-binding: t; -*-

;; Copyright (C) 2021, 2022, 2024  jao

;; Author: jao <mail@jao.io>
;; Keywords: multimedia

;; 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:

;; Simple spotifyd controls via the spt executable.

;;; Code:

(require 'jao-minibuffer)
(require 'jao-notify)

(defvar jao-spt-bin "spt")
(defvar jao-spt-format "'%s %t - %a [%r] %f'")
(defvar jao-spt-device nil)

(defun jao-spt--exec-async (&rest args)
  (let ((display-buffer-alist `((".*spt commands.*" display-buffer-no-window)))
        (buff (get-buffer-create "* spt commands *")))
    (apply #'start-process "spt" buff jao-spt-bin args)))

(defvar jao-spt--status-str "")

(defun jao-spt--pb (&rest args)
  (let* ((args (mapconcat #'identity args " "))
         (dev (if jao-spt-device (format "-d '%s'" jao-spt-device) ""))
         (cmd (format "%s pb %s -f %s %s" jao-spt-bin args jao-spt-format dev))
         (st (string-trim (shell-command-to-string cmd))))
    (setq jao-spt--status-str (when (string-prefix-p "▶" st) st))
    (jao-minibuffer-refresh)
    st))

(defun jao-spt--pb* (&rest args)
  (message "%s" (apply 'jao-spt--pb args)))

;;;###autoload
(defun jao-spt-play-uri (uri)
  (jao-spt--exec-async "play" "--uri" uri))

;;;###autoload
(defun jao-spt-update-status ()
  (interactive)
  (jao-spt--pb))

;;;###autoload
(defun jao-spt-toggle ()
  (interactive)
  (jao-spt--pb* "-t"))

;;;###autoload
(defun jao-spt-next ()
  (interactive)
  (jao-spt--pb* "-n"))

;;;###autoload
(defun jao-spt-previous ()
  (interactive)
  (jao-spt--pb* "-p"))

;;;###autoload
(defun jao-spt-like ()
  (interactive)
  (jao-spt--pb* "--like"))

;;;###autoload
(defun jao-spt-dislike ()
  (interactive)
  (jao-spt--pb* "--dislike"))

;;;###autoload
(defun jao-spt-toggle-shuffle ()
  (interactive)
  (jao-spt--pb* "--shuffle"))

;;;###autoload
(defun jao-spt-seek (&optional secs)
  (interactive "p")
  (let ((secs (if (zerop (or secs 0)) 10 secs)))
    (jao-spt--pb* "--seek" (format "%d" secs))))

;;;###autoload
(defun jao-spt-seek-back (&optional secs)
  (interactive "p")
  (jao-spt-seek (- secs)))

(defun jao-spt--get-vol (delta)
  (let* ((jao-spt-format "%v")
         (v (string-to-number (jao-spt--pb))))
    (number-to-string (max 0 (+ delta v)))))

;;;###autoload
(defun jao-spt-vol (&optional n)
  (interactive "p")
  (let ((n (or n 10)))
    (jao-spt--pb* "--volume" (jao-spt--get-vol (if (zerop n) 10 n)))))

;;;###autoload
(defun jao-spt-vol-down (&optional n)
  (interactive "p")
  (jao-spt-vol (- (or n 10))))

;;;###autoload
(defun jao-spt-echo-current ()
  (interactive)
  (let ((jao-notify-use-messages t))
    (jao-notify (jao-spt-update-status))))

;;;###autoload
(defun jao-spt-toggle-shuffle ()
  (interactive)
  (jao-spt--pb* "--shuffle"))

;;;###autoload
(defun jao-spt-set-up ()
  (jao-minibuffer-add-msg-variable 'jao-spt--status-str))

(defun jao-spt-lyrics-info ()
  (let* ((jao-spt-format "%a~~~%t")
         (s (jao-spt--pb))
         (at (split-string s "~~~")))
    (cons (car at) (cadr at))))

(declare jao-show-lyrics "jao-lyrics")

;;;###autoload
(defun jao-spt-show-lyrics (force)
  (interactive "P")
  (jao-show-lyrics force #'jao-spt-lyrics-info))

(provide 'jao-spt)
;;; jao-spt.el ends here
