(defvar mk/useful-websites
  '(("https://regexr.com/" regex debug)
    ("https://regex101.com/" regex debug)
    ("https://www.regextester.com/" regex debug)
    ("https://extendsclass.com/regex-tester.html#python" regex debug)
    ("https://everything.curl.dev/" curl tool)))

(defvar mk/mirror-website
  "Locally mirror a website using `wget -mkEpnp <url>`")

(defvar mk/useful-regex
  '(("[\w\s]+:" "match any word or space that precede the :")
    ("\[.*\]" "search for anything in square brackets")
    ("[A-Za-z]+" "upper and lowercase english alphabet")
    ("[0-9]" "numbers from 0 to 9")
    ("[A-Za-z\-\.]" "upper and lowercase english alphabet, - and .")
    ("(a-z)" "a, - and z")
    ("(\s+|,)" "spaces or a comma")
    ("#\w+" "find hashtags")
    ("([@|#]\w+)" "matches both mentions (@) and hashtags")
    ("(^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$)" "email regex")
    ("-?\d+(\.\d*)?" "matching decimal numbers")
    ("(?:http|https|ftp|mailto|file|data|irc):\/\/[A-Za-z0-9\-]{0,63}(\.[A-Za-z0-9\-]{0,63})+(:\d{1,4})?\/*(\/*[A-Za-z0-9\-._]+\/*)*(\?.*)?(#.*)?" "matching urls")
    ("^\d{4}/(0[1-9]|1[0-2])/(0[1-9]|[12][0-9]|3[01])$" "matching dates yyyy/mm/dd")
    ("^(0[1-9]|1[0-2])/(0[1-9]|[12][0-9]|3[01])/\d{4}$" "matching dates mm/dd/yyyy")
    ("^(0[1-9]|[12][0-9]|3[01])/(0[1-9]|1[0-2])/\d{4}$" "matching dates dd/mm/yyyy")
    ("<.+>" "matching html")
    ("<\/?(?:p|a|b|img)(?: \/)?>" "matchig specific tags")))

;; (defun mk-show-modeline ()
;;   (interactive)
;;   (setq mode-line-format
;;         '(("-" mode-line-mule-info
;;            mode-line-modified
;;            mode-line-frame-identification
;;            mode-line-buffer-identification " "
;;            mode-line-position
;;            mode-line-modes
;;            (which-func-mode
;;             ("" which-func-format "--"))
;;            (global-mode-string
;;             ("--" global-mode-string)) "-%-")))
;;   (defvar mode-line-format-current
;;     (symbol-value 'mode-line-format)))

;; (defun mk-hide-modeline ()
;;   (interactive)
;;   (setq mode-line-format nil))

;; (defun mk-write-mode-enable ()
;;   (setq olivetti-body-width 73)
;;   (olivetti-mode)
;;   (mk-hide-modeline))

;; (defun mk-write-mode-disable ()
;;   (olivetti-mode)
;;   (mk-show-modeline))

(defun mk/split-windows-horizontal (count-windows)
  "Split windows horizontal by equal width."
  (interactive "nHow many splits? ")
  (delete-other-windows)
  (let ((width (/ (window-total-width) count-windows)))
    (dotimes (i (1- count-windows))
      (split-window-right (- width)))))

(defun mk/split-windows-vertical (count-windows)
  "Split windows vertical by equal width."
  (interactive "nHow many splits? ")
  (delete-other-windows)
  (let ((height (/ (window-total-height) count-windows)))
    (dotimes (i (1- count-windows))
      (split-window-below (- height)))))

(defun mk/split-h3 ()
  (interactive)
  (mk/split-windows-horizontal 3))

(defun mk/split-v3 ()
  (interactive)
  (mk/split-windows-vertical 3))

;; Set transparency of emacs
(defun transparency (value)
  "Sets the transparency of the frame window. 0=transparent/100=opaque"
  (interactive "nTransparency Value 0 - 100 opaque: ")
  (set-frame-parameter (selected-frame) 'alpha value))

(defun mk/show-agenda-list ()
  (if (display-graphic-p)
      (add-hook 'after-init-hook (lambda () (org-agenda-list) (me/split-h3)))
    (org-agenda-list)))

(defun mk/list-files (folder suffix)
  (let ((regexp (concat "\\." suffix "$")))
    (directory-files folder nil regexp)))

(defun mk/build-file-suffix ())

(defun mk/copy-files (src-dir dst-dir suffix)
  (let ((src-files '())
        (src-dir (expand-file-name src-dir))
        (dst-dir (expand-file-name dst-dir)))
    (dolist (file (mk/list-files src-dir suffix) src-files)
      (let ((src-file (expand-file-name (concat src-dir "/" file)))
            (dst-file (expand-file-name (concat dst-dir "/" file))))
        (add-to-list 'src-files src-file)
        (copy-file src-file dst-file t)))))

(defun mk/delete-files (lst)
  (dolist (file lst)
    (delete-file file t)))


;; (defun shr-insert (text)
;;   (when (and (not (bolp))
;; 	     (get-text-property (1- (point)) 'image-url))
;;     (insert "\n"))
;;   (cond
;;    ((eq shr-folding-mode 'none)
;;     (let ((start (point)))
;;       (insert text)
;;       (save-restriction
;; 	(narrow-to-region start (point))
;;         (shr--translate-insertion-chars)
;; 	(goto-char (point-max)))))
;;    (t
;;     (let ((font-start (point)))
;;       (when (and (string-match "\\`[ \t\n\r]" text)
;; 		 (not (bolp))
;; 		 (not (eq (char-after (1- (point))) ? )))
;; 	(insert " "))
;;       (let ((start (point))
;; 	    (bolp (bolp)))
;; 	(insert text)
;; 	(save-restriction
;; 	  (narrow-to-region start (point))
;; 	  (goto-char start)
;;           (when (looking-at "[\t\n\r]+")
;; 	    (replace-match "" t t))
;; 	  (while (re-search-forward "[\t\n\r]+" nil t)
;; 	    (replace-match " " t t))
;; 	  (goto-char start)
;;           (while (re-search-forward "  +" nil t)
;;             (replace-match " " t t))
;;           (shr--translate-insertion-chars)
;; 	  (goto-char (point-max)))
;; 	;; We may have removed everything we inserted if it was just
;; 	;; spaces.
;; 	(unless (= font-start (point))
;; 	  ;; Mark all lines that should possibly be folded afterwards.
;; 	  (when bolp
;; 	    (shr-mark-fill start))
;; 	  (when shr-use-fonts
;; 	    (put-text-property font-start (point)
;; 			       'face
;; 			       (or shr-current-font 'variable-pitch)))))))))