;; -*- lexical-binding: t -*-

;;;; open pdfs
(jao-when-linux
 (use-package saveplace-pdf-view
  :ensure t
  :demand t
  :after doc-view))

(use-package jao-pdf :demand t)

(setq jao-open-doc-fun 'jao-find-or-open)
(setq jao-org-open-pdf-fun 'jao-find-or-open)

(defun jao-zathura-open (file page)
  (let ((id (jao-x11-search-window (jao-pdf-zathura-title-rx file))))
    (if (string-blank-p id)
        (progn
          (when jao-xmonad-enabled (jao-x11-goto-ws 2))
          (jao-shell-exec (jao-pdf-zathura-open-cmd file page)))
      (let* ((page (if page (format " && xdotool type %dg" page) ""))
             (cmd (format "xdotool windowactivate %s%s" id page)))
        (jao-shell-exec cmd t)))))

(defun jao-x11-zathura-goto-org (&optional title no-ask)
  (let ((title (or title (jao-shell-string "xdotool"
                                           "getactivewindow"
                                           "getwindowname"))))
    (jao-org-open-from-zathura title no-ask)))

(defun jao-find-or-open (file &optional page height)
  (cond ((and jao-browse-doc-use-emacs-p window-system)
         (let* ((buffs (buffer-list))
                (b (catch 'done
                     (while buffs
                       (when (string-equal (buffer-file-name (car buffs)) file)
                         (throw 'done (car buffs)))
                       (setq buffs (cdr buffs))))))
           (jao-afio-goto-docs)
           (if b (pop-to-buffer b) (find-file file))
           (when page (jao-doc-view-goto-page page height))))
        (jao-river-enabled (jao-river-open-with-zathura file page))
        (jao-sway-enabled (jao-sway-open-with-zathura file page))
        (t (jao-zathura-open file page))))

(defun jao-open-doc (&optional file page height)
  (interactive)
  (when-let (file (or file
                      (read-file-name "Document: "
                                      (concat jao-org-dir "/doc/"))))
    (funcall jao-open-doc-fun file page height)))

(defun jao-select-pdf ()
  (interactive)
  (jao-buffer-same-mode '(pdf-view-mode doc-view-mode)
                        #'jao-afio-goto-docs))

(defun jao-open-with-zathura ()
  (interactive)
  (when-let (f buffer-file-name)
    (let ((p (jao-doc-view-current-page)))
      (cond (jao-river-enabled (jao-river-open-with-zathura f p))
            (jao-sway-enabled (jao-sway-open-with-zathura f p))
            (t (jao-zathura-open f p))))))

;; doc:// links for browse-url
(defun jao-open-doc-url (url &rest _)
  (when (string-match "doc://\\([^?]+\\)\\(\\?.*\\)?" url)
    (let ((file (match-string 1 url))
          (page (when-let* ((qs (match-string 2 url))
                            (long (> (length qs) 1))
                            (ps (url-parse-query-string (substring qs 1)))
                            (pn (cadr (assoc "page" ps))))
                  (string-to-number pn))))
      (jao-open-doc (expand-file-name (concat "doc/" file) jao-org-dir) page))))

(add-to-list 'browse-url-handlers (cons "^doc://.+" 'jao-open-doc-url))

;;;; doc-view
(use-package doc-view
  :init
  (setq doc-view-cache-directory "~/.emacs.d/cache/docview"
        doc-view-resolution 110
        doc-view-continuous t
        doc-view-conversion-refresh-interval 1
        doc-view-mupdf-use-svg t)
  :hook ((doc-view-mode . jao-doc-session-mark))
  :bind (:map doc-view-mode-map
              ("j" . doc-view-next-line-or-next-page)
              ("J" . doc-view-search-next-match)
              ("k" . doc-view-previous-line-or-previous-page)
              ("K" . doc-view-search-previous-match)
              ("z" . jao-open-with-zathura)))

(use-package jao-doc-session :demand t)

(use-package jao-doc-view
  :demand t
  :bind (:map doc-view-mode-map
              ("b" . jao-doc-view-back)
              ("B" . jao-doc-view-forward)
              ("S" . jao-doc-session-save)
              ("u" . jao-doc-view-visit-url)))

;;;; transient
(defun jao-org-pdf-goto-org-linking ()
  (interactive)
  (jao-org-pdf-goto-org 4))

(jao-transient-major-mode doc-view
  ["Notes"
   ("o" "notes file" jao-org-pdf-goto-org)
   ("O" "notes file, linking" jao-org-pdf-goto-org-linking)]
  ["Navigation"
   ("b" "back jump" jao-doc-view-back)
   ("B" "forward jump" jao-doc-view-back)
   ("u" "visit URL" jao-doc-view-visit-url)]
  ["Slices"
   ("cb" "bounding box" doc-view-set-slice-from-bounding-box)
   ("cm" "using mouse" doc-view-set-slice-using-mouse)]
  ["Session"
   ("s" "load session" jao-afio-open-pdf-session)
   ("S" "save session" jao-doc-session-save)
   ("d" "visit cache directory" doc-view-dired-cache)]
  ["External viewers"
   ("z" "open with zathura" jao-open-with-zathura)])

(with-eval-after-load "pdf-view"
  (jao-transient-major-mode pdf-view
    ["Notes"
     ("o" "notes file" jao-org-pdf-goto-org)
     ("O" "notes file, linking" jao-org-pdf-goto-org-linking)]
    ["Navigation"
     ("b" "back jump" pdf-history-backward)
     ("f" "forward jump" pdf-history-forward)]
    ["Session"
     ("s" "load session" jao-afio-open-pdf-session)
     ("S" "save session" jao-doc-session-save)]
    ["External viewers"
     ("z" "open with zathura" jao-open-with-zathura)]))

;; (transient-get-suffix 'jao-transient-pdf-view '(0 -1))

(provide 'jao-custom-pdf)