;;; -*- lexical-binding: t; -*-
;;; Window placement
;;; TODO: Test popper.el.
;; (global-set-key (kbd "C-`") #'window-toggle-side-windows)
;; (global-set-key (kbd "M-`") #'kj/popup-toggle-override)
;; (setq window-sides-slots '(0 0 2 2))  ; 2 right side windows
(setq switch-to-buffer-obey-display-actions t)
(setq switch-to-buffer-in-dedicated-window 'pop)
(setq even-window-sizes 'width-only)
(defvar kj/popup-override nil)

(defun kj/popup-clear-overrides ()
  (interactive)
  (dolist (buffer (buffer-list))
    (with-current-buffer buffer
      (kill-local-variable 'kj/popup-override))))

(defun kj/popup-toggle-override ()
  (interactive)
  (if (local-variable-p 'kj/popup-override)
      (kill-local-variable 'kj/popup-override)
    (setq-local kj/popup-override
                (not (kj/popup-buffer-base (buffer-name)))))
  (let ((buffer (buffer-name)))
    (switch-to-prev-buffer)
    (switch-to-buffer buffer)))

(defun kj/popup-buffer-base (buffer &optional condition)
  (or
   (s-matches-p
    (rx (| "*Help*"
           "*info*"
           (seq "*Messages*")
           (seq "*Warnings*")
           (seq "*Backtrace*")
           (seq "*eldoc " (* anything) "*")
           (seq "*WoMan " (* anything) "*")
           (seq "*man " (* anything) "*")
           (seq "fig: " (* anything))
           (seq "*htop*" (* anything))
           (seq "*Proced*" (* anything))
           (seq "*eshell" (* anything))
           (seq "*shell" (* anything))
           "*Occur*")) buffer)
   (with-current-buffer buffer
     (apply #'derived-mode-p
            '(magit-mode
              compilation-mode
              shell-mode
              comint-mode
              Custom-mode       ; For customization
              fig-commit-mode)))))

(defun kj/popup-buffer (buffer &optional condition)
  (with-current-buffer buffer
    (if (local-variable-p 'kj/popup-override)
        kj/popup-override
      (kj/popup-buffer-base buffer condition))))

;; (setq transient-display-buffer-action
;;       '(display-buffer-in-best-side
;;         (slot . -1)
;;         (inhibit-same-window . t)
;;         (window-parameters
;;          (no-other-window . t))))

(defun kj/display-new-popup (buffer alist)
    (let ((popup-window
         (display-buffer-in-direction
          buffer
          (append (if (> (frame-width) 160)
                      '((direction . rightmost)
                        (window-width . 80))
                    '((direction . bottom)))))))
      (set-window-parameter popup-window 'kj/popup t)
      popup-window))

(defun kj/find-popup-window ()
  (seq-find
   (lambda (w)
     (window-parameter w 'kj/popup))
   (window-list)))

(defun display-popup-buffer (buffer alist)
  (let ((window (kj/find-popup-window)))
    (if window
        (window--display-buffer buffer window 'reuse alist)
      (kj/display-new-popup buffer alist))))

;; (add-to-list 'display-buffer-alist
;;              `(kj/popup-buffer
;;                (display-popup-buffer)
;;                (slot . 0)))

(provide 'kj-popup)