#+TITLE: Emacs Configuration
#+AUTHOR: Mars (@pupbrained)
#+EMAIL: mars@pupbrained.xyz

* Basic Setup

** Server

#+begin_src emacs-lisp
  (require 'bind-key)
  (load "server")
  (unless (server-running-p) (server-start))
#+end_src

** Auto-Save

*** Disable Built-In Auto-Save and Backup

#+begin_src emacs-lisp
  (setq auto-save-default nil
        make-backup-files nil)
#+end_src

*** Enable Real Auto-Save

#+begin_src emacs-lisp
  (use-package real-auto-save
    :ensure t
    :hook
    (prog-mode . real-auto-save-mode)
    :config
    (setq real-auto-save-interval 1))
#+end_src

** No Scratch On Open

#+begin_src emacs-lisp
  (setq initial-scratch-message nil)
  (setq initial-buffer-choice nil)

  (add-hook 'emacs-startup-hook
      (lambda ()
        (when (and (get-buffer "*scratch*")
       (not (eq (current-buffer) (get-buffer "*scratch*"))))
    (kill-buffer "*scratch*"))))
#+end_src

** Dirvish

#+begin_src emacs-lisp
  (add-hook 'dired-mode-hook 'dired-omit-mode)

  (defun my/dirvish-create-file ()
    "Create a new file in the current directory."
    (interactive)
    (let ((new-file (read-file-name "New file name: " (dired-current-directory))))
      (if (file-exists-p new-file)
          (message "File already exists!")
        (write-region "" nil new-file)
        (revert-buffer)  ;; Refresh the directory listing
        (message "File created: %s" new-file))))

  (use-package dirvish
    :ensure t
    :init
    (dirvish-override-dired-mode)
    :config
    (dirvish-peek-mode)
    (dirvish-side-follow-mode)
    (setq dired-listing-switches "-al --human-readable --group-directories-first"
          dired-mouse-drag-files t
          dired-omit-files (rx (or (seq bol (? ".") "#")
                                   (seq bol "." eol)
                                   (seq bol ".git" eol)))
          dirvish-emerge-groups '(("Recent files" (predicate . recent-files-2h))
                                  ("Documents" (extensions "pdf" "tex" "bib" "epub"))
                                  ("Video" (extensions "mp4" "mkv" "webm"))
                                  ("Pictures" (extensions "jpg" "png" "svg" "gif"))
                                  ("Audio" (extensions "mp3" "flac" "wav" "ape" "aac"))
                                  ("Archives" (extensions "gz" "rar" "zip")))
          dirvish-attributes '(vc-state subtree-state nerd-icons collapse git-msg file-time file-size)
          dirvish-mode-line-format '(:left (sort symlink) :right (omit yank index))
          dirvish-mode-line-height 25
          dirvish-subtree-state-style 'nerd
          mouse-drag-and-drop-region-cross-program t))

  ;; Addtional syntax highlighting for dired
  (use-package diredfl
    :ensure t
    :hook
    ((dired-mode . diredfl-mode)
     (dirvish-directory-view-mode . diredfl-mode))
    :config
    (set-face-attribute 'diredfl-dir-name nil :bold t))

  (use-package nerd-icons
    :ensure t
    :custom
    (nerd-icons-font-family "Maple Mono NF"))

  (use-package ns-auto-titlebar
    :ensure t
    :config
    (when (eq system-type 'darwin) (ns-auto-titlebar-mode)))
#+end_src

** Doom Modeline

#+begin_src emacs-lisp
  (use-package doom-modeline
    :ensure t
    :config
    (doom-modeline-mode))
#+end_src

** Nix

#+begin_src emacs-lisp
  (use-package nix-mode
    :mode "\\.nix\\'")
#+end_src

** Org Mode Templates

#+begin_src emacs-lisp
  ;; Inhibits autopairs from running for <> in org mode
  (add-hook 'org-mode-hook
      (lambda ()
        (setq-local electric-pair-inhibit-predicate
        `(lambda (c) (if (char-equal c ?<) t (,electric-pair-inhibit-predicate c))))))

  (require 'org-tempo)
  (add-to-list 'org-modules 'org-tempo t)

  (defun org-babel-edit-prep:emacs-lisp (babel-info)
    (setq-local buffer-file-name (->> babel-info caddr (alist-get :tangle)))
    (lsp))
#+end_src

** Fix Indents + Enable Autopairs

#+begin_src emacs-lisp
  (electric-indent-mode 1)
  (electric-pair-mode 1)
  (setq c-basic-offset 2)

  (setq-default tab-width 2)
  (setq-default indent-tabs-mode nil)
  (setq-default standard-indent 2)
  (global-set-key (kbd "TAB") 'indent-for-tab-command)

  (use-package evil
    :ensure t
    :init
    (setq evil-split-window-below t
          evil-undo-system 'undo-tree
          evil-vsplit-window-right t
          evil-want-C-i-jump nil
          evil-want-C-u-scroll t
          evil-want-integration t
          evil-want-integration t
          evil-want-keybinding nil)
    :config
    (evil-mode 1)
    (evil-define-key 'normal 'global (kbd "K") #'eldoc-box-help-at-point)
    (evil-define-key 'normal 'global (kbd "gg") #'magit-status)
    (evil-define-key 'normal 'global (kbd "gp") #'diff-hl-show-hunk)
    (evil-define-key 'normal 'global (kbd "gr") #'diff-hl-revert-hunk)
    (evil-define-key 'normal 'global (kbd "gs") #'diff-hl-stage-current-hunk))

  (use-package evil-collection
    :ensure t
    :config
    (evil-collection-init))

  (use-package evil-leader
    :ensure t
    :config
    (global-evil-leader-mode)
    (setq evil-leader/leader "<SPC>")
    (evil-leader/set-key "a" #'eglot-code-actions)
    (evil-leader/set-key "bb" #'switch-to-buffer)
    (evil-leader/set-key "bd" #'kill-this-buffer)
    (evil-leader/set-key "e" #'dirvish-side))

  (use-package catppuccin-theme
    :ensure t
    :demand t
    :config
    (load-theme 'catppuccin t))

  (setq auto-save-default nil
        make-backup-files nil)
#+end_src

** LSP

*** Eglot

#+begin_src emacs-lisp
  (use-package eglot
    :hook
    (prog-mode . eglot-ensure)
    :config
    (add-hook 'emacs-lisp-mode-hook 'eglot-ensure)
    (add-hook 'c-mode-hook 'hide-ifdef-mode)
    (add-hook 'c++-mode-hook 'hide-ifdef-mode))

  (setq-default eglot-workspace-configuration
    '((haskell
       (plugin
        (stan
         (globalOn . :json-false))))))  ;; disable stan

  (defun my/eglot-format-buffer-on-save ()
    "Format the current buffer if Eglot is active."
    (when (bound-and-true-p eglot--managed-p)
      (eglot-format-buffer)))

  (add-hook 'before-save-hook #'my/eglot-format-buffer-on-save)

  ;; Load posframe for popups
  (use-package eldoc-box :ensure t)
#+end_src

*** TreeSitter

#+begin_src emacs-lisp
  (use-package tree-sitter
    :ensure t
    :hook
    (prog-mode . tree-sitter-hl-mode)
    :config
    (global-tree-sitter-mode))

  (use-package tree-sitter-langs
    :ensure t)
#+end_src

** Rainbow Delimiters

#+begin_src emacs-lisp
  (use-package rainbow-delimiters
    :ensure t
    :config
    (add-hook 'prog-mode-hook 'rainbow-delimiters-mode))
#+end_src

** Disable Bars

#+begin_src emacs-lisp
  (menu-bar-mode -1)
  (scroll-bar-mode -1)
  (tool-bar-mode -1)
#+end_src

** Line Numbers

#+begin_src emacs-lisp
  (global-display-line-numbers-mode t)

  (setq display-line-numbers-type 'relative)

  (dolist (mode
           '(term-mode-hook
             vterm-mode-hook
             shell-mode-hook
             org-mode-hook
             dirvish-setup-hook
             eshell-mode-hook))
    (add-hook mode (lambda () (display-line-numbers-mode 0))))
#+end_src

** Vim-Style Scrolling

#+begin_src emacs-lisp
  (setq scroll-step 3
        scroll-conservatively 9999)
#+end_src

** System-Specific Settings

#+begin_src emacs-lisp
  (cond
   ((eq system-type 'darwin)
    (set-face-attribute 'default nil :font "Iosevka Comfy-14")
    (set-face-attribute 'fixed-pitch nil :font "Iosevka Comfy-14")
    (set-face-attribute 'variable-pitch nil :font "Iosevka Comfy Motion Duo-16")
    (setq default-frame-alist '((font . "Iosevka Comfy-14"))))
   ((eq system-type 'gnu/linux)
    (set-face-attribute 'default nil :font "Iosevka Comfy Medium-12")
    (set-face-attribute 'fixed-pitch nil :font "Iosevka Comfy Medium-12")
    (set-face-attribute 'variable-pitch nil :font "Iosevka Comfy Motion Duo Md-14")
    (setq default-frame-alist
          '((font . "Iosevka Comfy Medium-12")
            (undecorated . t)))))
#+end_src

** Use Short Answers

#+begin_src emacs-lisp
  (setq use-short-answers t)
#+end_src

** Enable ctrl+c/ctrl+v

#+begin_src emacs-lisp
  (cua-mode 1)
#+end_src

** Undo Tree

#+begin_src emacs-lisp
  (use-package undo-tree
    :ensure t
    :demand t
    :config
    (global-undo-tree-mode)
    (setq undo-tree-history-directory-alist '(("." . "~/.emacs.d/undo"))))
#+end_src

** Dashboard

#+begin_src emacs-lisp
  (use-package dashboard
    :ensure t
    :config
    (dashboard-setup-startup-hook)
    (setq dashboard-startup-banner 'logo
          dashboard-center-content t
          dashboard-vertically-center-content t
          dashboard-startup-banner 'logo
          initial-buffer-choice (lambda () (get-buffer-create "*dashboard*"))))
#+end_src

** Git Integration

#+begin_src emacs-lisp
  (use-package transient :ensure t)

  (use-package magit
    :ensure t
    :commands magit-status magit-blame magit-version
    :init
    (defadvice magit-status (around magit-fullscreen activate)
      (window-configuration-to-register :magit-fullscreen) ad-do-it
      (delete-other-windows))
    :config
    (setq magit-branch-arguments nil
          magit-completing-read-function 'magit-ivy-completing-read
          magit-default-tracking-name-function 'magit-default-tracking-name-branch-only
          magit-push-always-verify nil
          magit-restore-window-configuration t))

  (use-package diff-hl
    :ensure t
    :hook ((magit-post-refresh . diff-hl-magit-post-refresh))
    :config
    (global-diff-hl-mode))

  (use-package git-gutter
    :ensure t
    :config
    (global-git-gutter-mode +1))
#+end_src

** Direnv

#+begin_src emacs-lisp
  (use-package direnv
    :config
    (direnv-mode))
#+end_src

** Better M-x

*** Ivy Mode (Completions)

#+begin_src emacs-lisp
  (setq ivy-ignore-buffers '("\\` " "\\`\\*"))

  (use-package ivy
    :ensure t
    :config
    (ivy-mode)
    (setq ivy-use-virtual-buffers t
          enable-recursive-minibuffers t))
#+end_src

*** Amx Mode (Better Interface)

#+begin_src emacs-lisp
  (use-package amx
    :ensure t
    :config
    (amx-mode))
#+end_src

** Org Mode Improvements

#+begin_src emacs-lisp
  (add-hook 'org-mode-hook 'visual-line-mode)

  (use-package mixed-pitch
    :hook
    (org-mode . mixed-pitch-mode))

  (use-package org-modern
    :ensure t
    :hook (org-mode . org-modern-mode)
    :config
    (setq org-ellipsis "…")
    (setq org-modern-star 'replace))

  (use-package org-modern-indent
    :ensure (org-modern-indent :type git :host github :repo "jdtsmith/org-modern-indent")
    :config
    (add-hook 'org-mode-hook #'org-modern-indent-mode 90))
#+end_src