;;; bandali-erc.el --- bandali's ERC setup           -*- lexical-binding: t; -*-

;; Copyright (C) 2018-2021  Amin Bandali

;; Author: Amin Bandali <bandali@gnu.org>
;; Keywords: IRC, chat, client, Internet

;; 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:

;; My ERC setup for IRC in GNU Emacs.

;;; Code:

(with-eval-after-load 'erc
  (make-directory (b/var "erc/dcc") t)
  (csetq
   erc-auto-query 'bury
   erc-autojoin-domain-only nil
   erc-dcc-get-default-directory (b/var "erc/dcc")
   erc-email-userid "bandali"
   erc-format-nick-function 'erc-format-@nick
   erc-join-buffer 'bury
   ;; erc-lurker-hide-list '("JOIN" "PART" "QUIT")
   erc-nick "bandali"
   erc-prompt "erc>"
   erc-prompt-for-password nil
   erc-query-display 'buffer
   erc-rename-buffers t
   erc-server-reconnect-attempts 5
   erc-server-reconnect-timeout 3)

  (declare-function erc-message "erc-backend"
                    (message-command line &optional force))
  (declare-function erc-default-target "erc")
  (declare-function erc-current-nick "erc")
  (defun erc-cmd-OPME ()
    "Ask chanserv to op me in the current channel."
    (erc-message "PRIVMSG"
                 (format "chanserv op %s %s"
                         (erc-default-target)
                         (erc-current-nick))
                 nil))
  (declare-function erc-cmd-DEOP "erc" (&rest people))
  (defun erc-cmd-DEOPME ()
    "Deop myself in the current channel."
    (erc-cmd-DEOP (format "%s" (erc-current-nick))))
  (add-to-list 'erc-modules 'keep-place)
  (add-to-list 'erc-modules 'log)
  (when (display-graphic-p)
    (add-to-list 'erc-modules 'notifications)
    (add-to-list 'erc-modules 'smiley))
  (add-to-list 'erc-modules 'spelling)
  (declare-function erc-update-modules "erc")
  (erc-update-modules)

  ;; (set-face-attribute
  ;;  'erc-nick-default-face nil
  ;;  ;; :weight 'semibold
  ;;  ;; :background "#f2f2f2"
  ;;  ;; :foreground "#222222"
  ;;  :weight 'bold
  ;;  :background "#f8f8f8"
  ;;  :foreground "#6a6a6a")

  ;; (set-face-attribute
  ;;  'erc-notice-face nil
  ;;  ;; :background "#fffadf"
  ;;  ;; :background "#f9f9f9"
  ;;  :background 'unspecified
  ;;  ;; :foreground "#809de5"
  ;;  :foreground "steel blue")

  ;; erc-fill
  ;; (csetq
  ;;  erc-fill-column 77
  ;;  erc-fill-function 'erc-fill-variable
  ;;  erc-fill-static-center 18)
  ;; to disable:
  ;; (erc-fill-mode -1)

  ;; erc-log
  (defun b/erc-log-directory (buffer target _nick server _port)
    (let ((directory (concat (b/var "erc/logs/")
                             ;; (or (with-current-buffer buffer
                             ;;       (symbol-name erc-network))
                             ;;     server)
                             server
                             (if (erc-server-buffer-p buffer)
                                 (concat "/" server)
                               (and target (concat "/" target))))))
      (unless (file-exists-p directory)
        (make-directory directory 'make-parents))
      directory))
  (defun b/erc-log-file-name (&rest _)
    (concat (format-time-string "%Y-%m-%d") ".log"))
  (csetq
   ;; erc-enable-logging 'erc-log-all-but-server-buffers
   erc-generate-log-file-name-function #'b/erc-log-file-name
   erc-log-channels-directory #'b/erc-log-directory
   erc-log-file-coding-system 'utf-8
   erc-log-write-after-insert t
   erc-log-write-after-send t
   erc-save-buffer-on-part nil
   erc-save-queries-on-quit nil)

  ;; erc-match
  (csetq
   erc-pal-highlight-type 'nick
   erc-pals
   '("bremner" "^gopar" "^iank" "quidam" "^rwp" "sudoman"
     "technomancy" "thomzane"))
  (with-eval-after-load 'erc-match
    (set-face-attribute
     'erc-pal-face nil
     :foreground 'unspecified
     :weight 'unspecified
     :inherit 'erc-nick-default-face
     ;; :background (face-attribute 'font-lock-string-face :background)
     :background "#ffffdf"))

  ;; erc-pcomplete
  (csetq erc-pcomplete-nick-postfix ",")

  ;; erc-stamp
  (csetq erc-timestamp-only-if-changed-flag nil
         erc-timestamp-format "%T "
         erc-insert-timestamp-function 'erc-insert-timestamp-left)
  (with-eval-after-load 'erc-match
    (set-face-attribute
     'erc-timestamp-face nil
     :foreground "#aaaaaa"
     :weight 'unspecified
     :background 'unspecified))

  ;; erc-track
  (csetq
   erc-track-enable-keybindings nil
   erc-track-exclude-types '("JOIN" "MODE" "NICK" "PART" "QUIT"
                             "324" "329" "332" "333" "353" "477")
   erc-track-position-in-mode-line t
   erc-track-priority-faces-only 'all
   erc-track-shorten-function nil
   erc-track-showcount t)

  ;; key bindings
  (global-set-key (kbd "C-c w e") #'erc-switch-to-buffer-other-window)
  (define-key erc-mode-map (kbd "M-a") #'erc-track-switch-buffer))

;; global key bindings
(global-set-key
 (kbd "C-c a e f")
 (lambda ()
   (interactive)
   (erc-tls :server "chat.freenode.net" :port 6697
            :client-certificate t)))
(global-set-key
 (kbd "C-c a e o")
 (lambda ()
   (interactive)
   (erc-tls :server "irc.oftc.net" :port 6697
            :client-certificate t)))
(global-set-key
 (kbd "C-c a e t")
 (lambda ()
   (interactive)
   (erc-tls :server "na.tilde.chat" :port 6697
            :client-certificate t)))

(provide 'bandali-erc)
;;; bandali-erc.el ends here