;;; oni-smt.el --- Smart Modeline Themes configuration  -*- lexical-binding: t; -*-

;; Copyright (C) 2019  Tom Willemse

;; Author: Tom Willemse <tom@ryuslash.org>
;; Keywords: local
;; Version: 2019.0904.210822
;; Package-Requires: (smart-mode-line oni-flycheck)

;; 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:

;; Configuration for `smt-themes'.

;;; Code:

(require 'flycheck)
(require 'svg-mode-line-themes)

;; (require 'mode-icons)

(defun oni-smt-flycheck-errors-text (_)
  "Show an indicator of the number of errors and warnings from flycheck."
  (when flycheck-mode
    (let* ((counts (flycheck-count-errors flycheck-current-errors))
           (err-color (if (smt/window-active-p) "#a85454" "#969696"))
           (warn-color (if (smt/window-active-p) "#a88654" "#969696"))
           (info-color (if (smt/window-active-p) "#5476a8" "#969696"))
           (err-count (alist-get 'error counts 0))
           (warn-count (alist-get 'warning counts 0))
           (info-count (alist-get 'info counts 0)))
      `(tspan " " (tspan :fill ,err-color ,err-count)
              "/" (tspan :fill ,warn-color ,warn-count)
              "/" (tspan :fill ,info-color ,info-count)))))

(smt/defwidget oni-smt-flycheck-errors
  :text #'oni-smt-flycheck-errors-text)

(defun oni-smt-jabber-activity-text (_)
  "Show jabber activity indicator."
  (if (and (smt/window-active-p)
           (boundp 'jabber-activity-mode-string)
           (not (equal jabber-activity-mode-string "")))
      (concat jabber-activity-mode-string " ")))

(smt/defwidget oni-smt-jabber-activity
  :text #'oni-smt-jabber-activity-text)

;;; TODO Turn:
;;    #("message: (FORMAT-STRING &rest ARGS)"
;;       0  7 (face font-lock-function-name-face)
;;      10 23 (face eldoc-highlight-function-argument))
;;; into:
;;;  (tspan (tspan :fill (fg-color font-lock-function-name-face) "message:")
;;;         " ("
;;;         (tspan :fill (fg-color highlight-function-argument) "FORMAT-STRING")
;;;         " &rest ARGS)")

(defvar oni-smt-eldoc-message nil)

(defun oni-smt-eldoc-minibuffer-message (format-string &rest args)
  (if (minibufferp)
      (progn
        (add-hook 'minibuffer-exit-hook
                  (lambda () (setq oni-smt-eldoc-message nil
                              eldoc-mode-line-string nil
                              eldoc-last-message nil))
                  nil t)
        (setq oni-smt-eldoc-message
              (when (stringp format-string)
                (apply 'format format-string args)))
        (force-mode-line-update t))
    (apply 'message format-string args)))

(smt/defwidget oni-smt-eldoc-message
  :text (lambda (widget)
          (ignore widget)
          (when oni-smt-eldoc-message
            `(tspan :fill "#bfbfbf" " (" (tspan :fill "#5476a8" ,oni-smt-eldoc-message) ")"))))

(defun oni-smt-yoshi-title-style (_)
  "Fill color for either active or inactive windows."
  (list :fill (if (smt/window-active-p) "#65a854" "#969696")
        :font-weight (if (smt/window-active-p) "bold" "normal")))

(smt/defwidget oni-smt-po-counters
  :text (lambda (widget)
          (ignore widget)
          (when (eql major-mode 'po-mode)
            (format " %dt+%df+%du+%do" po-translated-counter
                    po-fuzzy-counter po-untranslated-counter
                    po-obsolete-counter))))

(smt/defwidget oni-smt-buffer-identification
  :style 'oni-smt-yoshi-title-style
  :text (lambda (widget)
          (ignore widget)
          (concat
           (string-trim
            (substring-no-properties
             (format-mode-line mode-line-buffer-identification)))
           (when (and (or buffer-file-name
                          buffer-offer-save)
                      (buffer-modified-p))
             "*"))))

(smt/defwidget oni-smt-current-dictionary
  :text (lambda (widget)
          (ignore widget)
          (if flyspell-mode
              (concat " " (or ispell-current-dictionary
                              ispell-local-dictionary
                              flyspell-default-dictionary)))))

(smt/defwidget oni-smt-erc
  :text (lambda (_)
          (when (boundp 'erc-modified-channels-alist)
            erc-modified-channels-object)))

(smt/defwidget oni-smt-position
  :text (lambda (_) (format-mode-line "%l/%c:%p")))

(defun oni-smt-read-only/write (_)
  "Show a locked or unlocked icon."
  `(tspan :font-family "FontAwesome"
          :font-size 13
          ,(if buffer-read-only " " " ")))

(smt/defwidget oni-smt-rwo
  :text #'oni-smt-read-only/write)

(defun oni-smt-extra-minor-modes (minor-modes)
  "Add some more info to MINOR-MODES."
  (if (boundp 'evil-state)
      (let ((l (capitalize (elt (symbol-name evil-state) 0))))
        `(tspan ,minor-modes (tspan :fill "#54a875" ,(char-to-string l))))
    minor-modes))

(add-function
 :filter-return
 (symbol-function 'smt/minor-mode-indicator-text)
 #'oni-smt-extra-minor-modes)

(smt/defrow oni-smt-right
  :prototype 'default-right
  :widgets '(oni-smt-jabber-activity
             oni-smt-erc
             major-mode
             oni-smt-current-dictionary
             oni-smt-flycheck-errors
             version-control
             minor-modes)
  :margin 17)

;; (defun smt/r-export-image (row theme)
;;   `(image
;;     :x ,(if (equal (smt/r-align row) "left")
;;             (* (smt/r-margin row)
;;                (frame-char-width))
;;           (- (smt/window-pixel-width)
;;              (* (smt/r-margin row)
;;                 (frame-char-width))))
;;     :y 2
;;     :width 16
;;     :height 16
;;     :xlink:href ,(concat "data:image/png;base64,"
;;                          (let ((name (nth 1 (mode-icons-get-icon-spec mode-name))))
;;                            (if name
;;                                (with-temp-buffer
;;                                  (insert-file-contents (concat (mode-icons-get-icon-file name) ".png"))
;;                                  (base64-encode-region (point-min) (point-max))
;;                                  (buffer-substring-no-properties (point-min) (point-max)))
;;                              mode-name)))))

;; (smt/defrow oni-smt-major-mode
;;   :prototype 'default-right
;;   :export 'smt/r-export-image
;;   :margin 40)

(smt/defrow oni-smt-left
  :prototype 'default-left
  :widgets '(buffer-info
             oni-smt-rwo
             oni-smt-buffer-identification
             oni-smt-po-counters
             which-function
             oni-smt-eldoc-message))

(smt/defrow oni-smt-position
  :prototype 'default-position
  :widgets '(oni-smt-position))

(defun oni-smt-major-mode-style (widget)
  (ignore widget)
  '(:fill "#ccc" :font-family "Signika" :filter nil
          :font-weight "regular" :font-style "italic"))

(defun oni-smt-background (_)
  ""
  (let ((stops '(("0%" "#484848" 0.3)
                 ("25%" "#484848" 0.3)
                 ("75%" "#484848" 0.3)
                 ("100%" "#111111" 0.3))))
    `((\defs
       (linearGradient
        :id "twisted" :x1 "0%" :y1 "0%" :x2 "100%" :y2 "25%"
        (stop :offset ,(first (nth 1 stops)) :stop-color ,(second (nth 1 stops)) :stop-opacity ,(third (nth 1 stops)))
        (stop :offset ,(first (nth 2 stops)) :stop-color ,(second (nth 2 stops)) :stop-opacity ,(third (nth 2 stops)))
        (stop :offset ,(first (nth 3 stops)) :stop-color ,(second (nth 3 stops)) :stop-opacity ,(third (nth 3 stops)))
        (stop :offset ,(first (nth 4 stops)) :stop-color ,(second (nth 4 stops)) :stop-opacity ,(third (nth 4 stops)))))
      (rect :width "100%" :height "100%" :x 0 :y 0 :fill "url(#twisted)"))))

(defun oni-smt-overlay (_)
  ""
  (let ((stops '(("0%" "#FFFFFF" 0.1)
                 ("20%" "#111111" 0.0)
                 ("90%" "#111111" 0.5)
                 ("100%" "#111111" 0.8))))
    `((\defs
       (linearGradient
        :id "over-gradient" :x1 "0%" :y1 "0%" :x2 "0%" :y2 "100%"
        (stop :offset ,(first (nth 1 stops)) :stop-color ,(second (nth 1 stops)) :stop-opacity ,(third (nth 1 stops)))
        (stop :offset ,(first (nth 2 stops)) :stop-color ,(second (nth 2 stops)) :stop-opacity ,(third (nth 2 stops)))
        (stop :offset ,(first (nth 3 stops)) :stop-color ,(second (nth 3 stops)) :stop-opacity ,(third (nth 3 stops)))
        (stop :offset ,(first (nth 4 stops)) :stop-color ,(second (nth 4 stops)) :stop-opacity ,(third (nth 4 stops)))))
      (rect :width "100%" :height "100%" :x 0 :y 0 :fill "url(#over-gradient)"))))

(smt/deftheme oni-smt
  :prototype 'black-crystal
  :overlay 'oni-smt-overlay
  :background 'oni-smt-background
  :local-widgets (list (cons 'major-mode
                             (smt/make-widget
                              :prototype 'major-mode
                              :style 'oni-smt-major-mode-style)))
  :rows '(oni-smt-left oni-smt-position oni-smt-right))

(add-function :override (symbol-function 'eldoc-minibuffer-message)
              #'oni-smt-eldoc-minibuffer-message)

(provide 'oni-smt)
;;; oni-smt.el ends here