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;;; thanos-eshell.el --- eshell configuration        -*- lexical-binding: t; -*-

;; Copyright (C) 2023  Thanos Apollo

;; Author: Thanos Apollo <[email protected]>
;; Keywords: 

;; 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:
;; ╭━━━━┳╮╱╱╱╱╱╱╱╱╱╱╱╱╱╱╭━━━╮╱╱╱╱╱╭╮╭╮╱╱╱╱╱╱╱╱╭━━━╮
;; ┃╭╮╭╮┃┃╱╱╱╱╱╱╱╱╱╱╱╱╱╱┃╭━╮┃╱╱╱╱╱┃┃┃┃╱╱╱╱╱╱╱╱┃╭━━╯
;; ╰╯┃┃╰┫╰━┳━━┳━╮╭━━┳━━╮┃┃╱┃┣━━┳━━┫┃┃┃╭━━╮╱╱╱╱┃╰━━┳╮╭┳━━┳━━┳━━╮
;; ╱╱┃┃╱┃╭╮┃╭╮┃╭╮┫╭╮┃━━┫┃╰━╯┃╭╮┃╭╮┃┃┃┃┃╭╮┃╭━━╮┃╭━━┫╰╯┃╭╮┃╭━┫━━┫
;; ╱╱┃┃╱┃┃┃┃╭╮┃┃┃┃╰╯┣━━┃┃╭━╮┃╰╯┃╰╯┃╰┫╰┫╰╯┃╰━━╯┃╰━━┫┃┃┃╭╮┃╰━╋━━┃
;; ╱╱╰╯╱╰╯╰┻╯╰┻╯╰┻━━┻━━╯╰╯╱╰┫╭━┻━━┻━┻━┻━━╯╱╱╱╱╰━━━┻┻┻┻╯╰┻━━┻━━╯
;; ╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱┃┃
;; ╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╱╰╯
;;; Code:

(setenv "EDITOR" "emacsclient -n")
(setenv "DEBEMAIL" "[email protected]")
(setenv "DEBNAME" "Thanos Apollo")
;; configuration with eat
(require 'eshell)
(require 'eat)

(setf eshell-visual-commands '())
(eat-eshell-mode 1)

;;;; sudo completion
(defun pcomplete/sudo ()
  "Completion rules for the `sudo' command."
  (let ((pcomplete-ignore-case t))
    (pcomplete-here (funcall pcomplete-command-completion-function))
    (while (pcomplete-here (pcomplete-entries)))))

;;;; systemctl completion
(defcustom pcomplete-systemctl-commands
  '("disable" "enable" "status" "start" "restart" "stop" "reenable"
    "list-units" "list-unit-files")
  "p-completion candidates for `systemctl' main commands"
  :type '(repeat (string :tag "systemctl command"))
  :group 'pcomplete)

(defvar pcomplete-systemd-units
  (split-string
   (shell-command-to-string
    "(systemctl list-units --all --full --no-legend;systemctl list-unit-files --full --no-legend)|while read -r a b; do echo \" $a\";done;"))
  "p-completion candidates for all `systemd' units")

(defvar pcomplete-systemd-user-units
  (split-string
   (shell-command-to-string
    "(systemctl list-units --user --all --full --no-legend;systemctl list-unit-files --user --full --no-legend)|while read -r a b;do echo \" $a\";done;"))
  "p-completion candidates for all `systemd' user units")

(defun pcomplete/systemctl ()
  "Completion rules for the `systemctl' command."
  (pcomplete-here (append pcomplete-systemctl-commands '("--user")))
  (cond ((pcomplete-test "--user")
	 (pcomplete-here pcomplete-systemctl-commands)
	 (pcomplete-here pcomplete-systemd-user-units))
	(t (pcomplete-here pcomplete-systemd-units))))

;;;; man completion
(defvar pcomplete-man-user-commands
  (split-string
   (shell-command-to-string
    "apropos -s 1 .|while read -r a b; do echo \" $a\";done;"))
  "p-completion candidates for `man' command")

(defun pcomplete/man ()
  "Completion rules for the `man' command."
  (pcomplete-here pcomplete-man-user-commands))

;; hut completion
(defcustom pcomplete-hut-commands
  '("builds" "export" "git" "graphql" "lists" "help" "hg"
    "init" "meta" "pages" "paste" "todo")
  "p-completion candidates for `hut' main commands"
  :type '(repeat (string :tag "hut command"))
  :group 'pcomplete)

(defun pcomplete/hut ()
  "Completion rules for `hut' command"
  (pcomplete-here (append pcomplete-hut-commands)))

(setq thanos/eshell-aliases
      '((g . magit)
	(gl . magit-log)
	(d . dired)
	(o . find-file)	
	(oo . find-file-other-window)
	(ll . (lambda () (eshell/ls '-la)))
	(eshell/clear . eshell/clear-scrollback)))

;; Define aliases using `mapc`
(mapc (lambda (alias)
	(defalias (car alias) (cdr alias)))
      thanos/eshell-aliases)

;; PATH 
(defvar eshell-path-env (getenv "~/.local/bin"))

(require 'eshell-git-prompt)
;; customize multiline theme 
(defun eshell-git-prompt-multiline ()
  "Eshell Git prompt inspired by spaceship-prompt."
  (let (separator hr dir git git-dirty time sign command)
    (setq separator (with-face " | " 'eshell-git-prompt-multiline-secondary-face))
    (setq hr (with-face (concat "\n" (make-string (/ (window-total-width) 2) ?─) "\n") 'eshell-git-prompt-multiline-secondary-face))
    (setq dir
	  (concat
	   (concat  (abbreviate-file-name (eshell/pwd)))))
    (setq git
	  (concat (with-face "⎇" 'eshell-git-prompt-exit-success-face)
		  (concat (eshell-git-prompt--branch-name))))
    (setq git-dirty
	  (when (eshell-git-prompt--branch-name)
	    (if (eshell-git-prompt--collect-status)
		(with-face " ✎" 'eshell-git-prompt-modified-face)
	      (with-face " ✔" 'eshell-git-prompt-exit-success-face))))
    (setq time (with-face (format-time-string "%I:%M:%S %p") 'eshell-git-prompt-multiline-secondary-face))
    (setq sign
	  (if (= (user-uid) 0)
	      (with-face "\n#" 'eshell-git-prompt-multiline-sign-face)
	    (with-face "\nλ" 'eshell-git-prompt-multiline-sign-face)))
    (setq command (with-face " " 'eshell-git-prompt-multiline-command-face))


    (eshell-git-prompt---str-read-only
     (concat hr dir separator git git-dirty separator time sign command))))

(eshell-git-prompt-use-theme 'multiline)

(eshell-syntax-highlighting-global-mode 1)

(setq eshell-highlight-prompt t)


(define-prefix-command 'thanos/eshell-map)
(global-set-key (kbd "C-c e") 'thanos/eshell-map)

(define-key thanos/eshell-map (kbd "o") 'multi-eshell)
(define-key thanos/eshell-map (kbd "n") 'multi-eshell-switch)

(defvar thanos/vterm-map (make-sparse-keymap))
(define-prefix-command 'thanos/vterm-map)
(define-key global-map (kbd "C-c v") 'thanos/vterm-map)
(define-key thanos/vterm-map (kbd "n") 'multi-vterm-next)
(define-key thanos/vterm-map (kbd "p") 'multi-vterm-prev)
(define-key thanos/vterm-map (kbd "d") 'multi-vterm-dedicated-open)
(define-key thanos/vterm-map (kbd "o") 'multi-vterm)


(provide 'thanos-eshell)
;;; thanos-eshell.el ends here