;;; splash-phrases.el --- Generated package (no.7) from my config -*- lexical-binding: t; -*-
;;
;; Copyright (C) 2025 TEC
;;
;; Author: TEC <https://code.tecosaur.net/tec>
;; Maintainer: TEC <contact@tecosaur.net>
;; Created: April 17, 2025
;; Modified: April 17, 2025
;; Version: 2025.04.17
;; Homepage: https://code.tecosaur.net/tec/emacs-config
;; Package-Requires: ((emacs "29.1"))
;;
;; This file is not part of GNU Emacs.
;;
;;; Commentary:
;;
;;  Generated package (no.7) from my config.
;;
;;  During generation, dependency on other aspects of my configuration and
;;  packages is inferred via (regexp-based) static analysis.  While this seems
;;  to do a good job, this method is imperfect.  This code likely depends on
;;  utilities provided by Doom, and if you try to run it in isolation you may
;;  discover the code makes more assumptions.
;;
;;  That said, I've found pretty good results so far.
;;
;;; Code:

(defvar splash-phrase-source-folder
  (expand-file-name "misc/splash-phrases" doom-user-dir)
  "A folder of text files with a fun phrase on each line.")

(defvar splash-phrase-sources
  (let* ((files (directory-files splash-phrase-source-folder nil "\\.txt\\'"))
         (sets (delete-dups (mapcar
                             (lambda (file)
                               (replace-regexp-in-string "\\(?:-[0-9]+-\\w+\\)?\\.txt" "" file))
                             files))))
    (mapcar (lambda (sset)
              (cons sset
                    (delq nil (mapcar
                               (lambda (file)
                                 (when (string-match-p (regexp-quote sset) file)
                                   file))
                               files))))
            sets))
  "A list of cons giving the phrase set name, and a list of files which contain phrase components.")

(defvar splash-phrase-set
  (nth (random (length splash-phrase-sources)) (mapcar #'car splash-phrase-sources))
  "The default phrase set. See `splash-phrase-sources'.")

(defun splash-phrase-set-random-set ()
  "Set a new random splash phrase set."
  (interactive)
  (setq splash-phrase-set
        (nth (random (1- (length splash-phrase-sources)))
             (cl-set-difference (mapcar #'car splash-phrase-sources) (list splash-phrase-set))))
  (+doom-dashboard-reload t))

(defun splash-phrase-select-set ()
  "Select a specific splash phrase set."
  (interactive)
  (setq splash-phrase-set (completing-read "Phrase set: " (mapcar #'car splash-phrase-sources)))
  (+doom-dashboard-reload t))

(defvar splash-phrase--cached-lines nil)

(defun splash-phrase-get-from-file (file)
  "Fetch a random line from FILE."
  (let ((lines (or (cdr (assoc file splash-phrase--cached-lines))
                   (cdar (push (cons file
                                     (with-temp-buffer
                                       (insert-file-contents (expand-file-name file splash-phrase-source-folder))
                                       (split-string (string-trim (buffer-string)) "\n")))
                               splash-phrase--cached-lines)))))
    (nth (random (length lines)) lines)))

(defun splash-phrase (&optional set)
  "Construct a splash phrase from SET. See `splash-phrase-sources'."
  (mapconcat
   #'splash-phrase-get-from-file
   (cdr (assoc (or set splash-phrase-set) splash-phrase-sources))
   " "))

(defun splash-phrase-dashboard-formatted ()
  "Get a splash phrase, flow it over multiple lines as needed, and fontify it."
  (mapconcat
   (lambda (line)
     (+doom-dashboard--center
      +doom-dashboard--width
      (with-temp-buffer
        (insert-text-button
         line
         'action
         (lambda (_) (+doom-dashboard-reload t))
         'face 'doom-dashboard-menu-title
         'mouse-face 'doom-dashboard-menu-title
         'help-echo "Random phrase"
         'follow-link t)
        (buffer-string))))
   (split-string
    (with-temp-buffer
      (insert (splash-phrase))
      (setq fill-column (min 70 (/ (* 2 (window-width)) 3)))
      (fill-region (point-min) (point-max))
      (buffer-string))
    "\n")
   "\n"))

(defun splash-phrase-dashboard-insert ()
  "Insert the splash phrase surrounded by newlines."
  (insert "\n" (splash-phrase-dashboard-formatted) "\n"))

(provide 'splash-phrases)
;;; splash-phrases.el ends here