;;; Package

(require 'package)

;; Prevent loading packages twice
(setq package-enable-at-startup nil)

(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/") t)

(package-initialize)

(defalias '_prc 'package-refresh-contents)
(defalias '_pi 'package-install)

;;; Use-Package

(unless (package-installed-p 'use-package)
  (package-refresh-contents)
  (package-install 'use-package))

(require 'use-package)

;;; No-Littering

(use-package no-littering
  :ensure t
  :init
  (setq no-littering-etc-directory
        (expand-file-name "auto-package-configuration/" user-emacs-directory))

  (setq no-littering-var-directory
        (expand-file-name "auto-package-data/" user-emacs-directory))

  (setq auto-save-file-name-transforms
        `((".*" ,(no-littering-expand-var-file-name "auto-save/") t)))

  (setq custom-file (no-littering-expand-etc-file-name "custom.el"))
  ;; Create `custom-file' if it doesn't exist
  (or (file-exists-p custom-file)
      (make-empty-file custom-file)))

;;; Configuration Directory Structure

(defconst user-system-dependencies           (concat user-emacs-directory "system-dependencies/"))
(defconst user-src-packages                  (concat user-emacs-directory "src-packages/"))
;; Create while cloning repo
(defconst user-others-utils                  (concat user-emacs-directory "others-utils/"))
(defconst user-utils                         (concat user-emacs-directory "my-utils/"))

(load custom-file)

(unless (boundp 'user-installed-emacs-config?)
  (mapc #'make-directory `(,user-system-dependencies ,user-src-packages))

  ;; Append variable binding of `user-installed-emacs-config?' to file `custom-file'
  (write-region (format "%s" '(defconst user-installed-emacs-config? t))
                nil custom-file t))

;;; Built-in Primitives

(defalias 'yes-or-no-p 'y-or-n-p)

(setq inhibit-startup-screen t)

(setq default-directory "~/")

(setq visible-bell nil)
(setq ring-bell-function 'ignore)

;;; Exec Path From Shell

(use-package exec-path-from-shell
  :ensure t
  :config
  (exec-path-from-shell-initialize))

;;; Magit

(use-package magit
  :ensure t
  :defer t
  :bind
  (("C-c m s" . magit-status)
   ("C-c m c" . magit-commit)
   ("C-c m p" . magit-push)
   ("C-c m S" . magit-stage)))

;;; Utilities

(defvar user-others-utils-list
  (mapcar (lambda (util) (concat user-others-utils util))
          '("emacsredux.el" "fuco1.el")))

(unless (file-exists-p (car user-others-utils-list))
  (magit-call-git "clone" "https://git.lain.church/zdm/others-utils" (expand-file-name user-others-utils)))

(mapc 'load user-others-utils-list)

(defalias '_su 'emacsredux-sudo-edit)

;;; Winner

(use-package winner
  :config
  (winner-mode))

;;; Shell

(use-package shell
  :config
  (defalias '_sh 'shell))

;;; Paren

(use-package paren
  :config
  (show-paren-mode))

;;; Simple

(use-package simple
  :config
  (column-number-mode))

;;; Delete Selection

(use-package delsel
  :config
  (delete-selection-mode))

;; Tabs/Spaces

(setq-default indent-tabs-mode nil)
(setq-default tab-width 4)

;;; Minibuffer Depth

(use-package mb-depth
  :config
  (setq enable-recursive-minibuffers t)
  (setq minibuffer-depth-indicate-mode t))

;;; Aesthetics

(mapc (lambda (mode)
        (funcall mode -1))
      '(menu-bar-mode scroll-bar-mode tool-bar-mode))

(use-package doom-themes
  :ensure t
  :config
  (load-theme 'doom-wilmersdorf t))

(add-to-list 'default-frame-alist '(font . "Iosevka Custom 13"))

(setq-default cursor-type 'bar)

;;; Electric Pair

(use-package electric-pair
  :defer t
  :hook
  ((prog-mode) . electric-pair-mode))

;;; Aggressive Indent
(use-package aggressive-indent
  :ensure t
  :defer t
  :hook
  (prog-mode . aggressive-indent-mode))

;;; Man

(use-package man
  :bind
  ("C-c c m" . man))

;;; Ibuffer

(use-package ibuffer
  :init
  (setq ibuffer-expert t)
  (setq ibuffer-show-empty-filter-groups nil)

  (defun user-ibuffer-quit ()
    (interactive)
    (quit-window t))
  :bind
  (("C-x C-b" . ibuffer)
   :map ibuffer-mode-map
   ("q" . user-ibuffer-quit))
  :hook
  ((ibuffer-mode) . ibuffer-auto-mode)
  ((ibuffer-auto-mode) . ibuffer-set-filter-groups-by-mode)
  :config
  (fuco1-special-beginning-of-buffer ibuffer (ibuffer-forward-line 1))
  (fuco1-special-end-of-buffer ibuffer (ibuffer-backward-line 1)))

;;; Dired

(use-package dired+
  :load-path user-src-packages
  :defer t)

(unless (require 'dired+ nil 'noerror)
  (url-copy-file "https://www.emacswiki.org/emacs/download/dired%2b.el" (concat user-src-packages "dired+.el")))

(use-package dired
  :defer t
  :hook
  ((dired-mode) . dired-hide-details-mode)
  :init
  (setq dired-listing-switches "-la --group-directories-first")
  (setq dired-recursive-copies 'always)
  (setq dired-recursive-deletes 'top)
  (setq global-auto-revert-non-file-buffers t)
  (setq auto-revert-verbose nil)
  :config
  (fuco1-special-beginning-of-buffer dired
    (while (not (ignore-errors (dired-get-filename)))
      (dired-next-line 1)))
  (fuco1-special-end-of-buffer dired (dired-previous-line 1)))

;;; Doom Modeline

(use-package doom-modeline
  :ensure t
  :init (doom-modeline-mode 1))

;;; Ace Link

(use-package ace-link
  :ensure t
  :defer t
  :config
  (ace-link-setup-default))

;;; Avy

(use-package avy
  :ensure t
  :defer t
  :init
  (setq avy-style 'pre)
  :bind
  (("C-c w" . avy-goto-word-1)
   ("C-c l" . avy-goto-line)))

;;; Counsel

(use-package counsel
  :ensure t
  :defer t
  :init
  (setq counsel-find-file-at-point t)

  (defun user-ivy-switch-file-search ()
    (interactive)
    (ivy-quit-and-run (counsel-fzf nil ivy--directory)))
  :bind
  (("C-s"     . counsel-grep-or-swiper)
   ("M-x"     . counsel-M-x)
   ("M-y"     . counsel-yank-pop)
   ("C-x C-f" . counsel-find-file)
   ("C-h f"   . counsel-describe-function)
   ("C-h v"   . counsel-describe-variable)
   ("C-c c u" . counsel-unicode-char)
   ("C-c c o" . counsel-outline))
  (:map ivy-minibuffer-map
        ("M-s r" . user-ivy-switch-file-search)))

;;; Ivy

(use-package ivy
  :ensure t
  :defer t
  :init
  (setq ivy-use-virtual-buffers nil)
  :config
  (ivy-mode))

;;; Swiper

(use-package swiper
  :ensure t
  :defer t)

;;; Ivy-Avy

(use-package ivy-avy
  :ensure t)

;;; Hydra

(use-package hydra
  :ensure t
  :defer t)

;; Expand Region

(use-package expand-region
  :ensure t
  :defer t
  :bind
  ("C-=" . er/expand-region))

;;; Multiple Cursors

(use-package multiple-cursors
  :ensure t
  :defer t
  :bind
  ("C-S-<mouse-1>" . mc/add-cursor-on-click))

;;; Lispy

(use-package lispy
  :ensure t
  :defer t
  :hook
  ((emacs-lisp-mode scheme-mode) . lispy-mode))

;;; Ace Window

(use-package ace-window
  :ensure
  :defer t
  :init
  (setq aw-scope 'frame)
  :bind
  ("C-x o" . ace-window))

;;; Form Feed

(use-package form-feed
  :ensure t
  :defer t
  :hook
  ((Info-mode org-mode text-mode) . form-feed-mode))

;;; Unfill

(use-package unfill
  :ensure t
  :defer t)

;;; Flyspell

(use-package flyspell
  :defer t
  :hook
  ((prog-mode) . flyspell-prog-mode)
  ((text-mode org-mode) . flyspell-mode))

;;; PDF Tools

(use-package pdf-tools
  :ensure t
  :magic ("%PDF" . pdf-view-mode)
  :config
  (pdf-tools-install :no-query))

;;; Geiser

(use-package geiser
  :ensure t
  :defer t)

;;; Lsp

(let ((elixir-directory (expand-file-name (concat user-system-dependencies "elixir-ls/")))
      (elixir-zipfile (expand-file-name (concat user-system-dependencies "elixir-ls-1.11.zip"))))
  (unless (file-directory-p elixir-directory)
    (url-copy-file "https://github.com/elixir-lsp/elixir-ls/releases/download/v0.6.4/elixir-ls-1.11.zip"
                   elixir-zipfile)
    (shell-command (concat "unzip " elixir-zipfile " -d " elixir-directory))
    (delete-file elixir-zipfile)))

(use-package lsp-mode
  :commands lsp
  :ensure t
  :hook
  (elixir-mode . lsp)
  :init
  (add-to-list 'exec-path user-system-dependencies))

;;; DAP

(use-package dap-mode
  :ensure t
  :hook ((elixir-mode . dap-mode)
         (elixir-mode . dap-ui-mode)))

;;; inf-elixir

(use-package inf-elixir
  :after elixir-mode
  :load-path (lambda () (list (concat user-src-packages "inf-elixir/")))
  :bind (:map elixir-mode-map
              ("C-c i i" . 'inf-elixir)
              ("C-c i p" . 'inf-elixir-project)
              ("C-c i l" . 'inf-elixir-send-line)
              ("C-c i r" . 'inf-elixir-send-region)
              ("C-c i b" . 'inf-elixir-send-buffer)))

(unless (require 'inf-elixir nil 'noerror)
  (magit-call-git "clone" "https://github.com/J3RN/inf-elixir/" (expand-file-name (concat user-src-packages "inf-elixir/"))))

;;; Elixir

(use-package elixir-mode
  :ensure t
  :defer t)

;;; Exunit

(use-package exunit
  :ensure t
  :defer t)

;;; Emacs Upload

(use-package emacs-upload
  :load-path (lambda () (list (concat user-src-packages "emacs-upload/")))
  :defer t
  :bind
  ("C-c e" . emacs-upload))

(unless (require 'emacs-upload nil 'noerror)
  (magit-call-git "clone" "https://git.lain.church/zdm/emacs-upload.git" (expand-file-name (concat user-src-packages "emacs-upload/"))))

;;; ERC

(use-package erc
  :defer t
  :bind
  (:map erc-mode-map
        ("C-<return>" . ace-link))
  :init
  (defun user-erc-mpv-url (url &optional new-window)
    (start-process "mpv" "*mpv*" "mpv" url))

  (defun user-erc-feh-url (url &optional new-window)
    (start-process "feh" "*feh*" "feh" url))

  (setq browse-url-browser-function '(("\\(?:flac\\|m\\(?:kv\\|p[34]\\)\\|webm\\|youtube\\)" . user-erc-mpv-url)
                                      ("\\(?:JPG\\|PNG\\|\\(?:jp\\|pn\\)g\\)" . user-erc-feh-url)
                                      ("." . browse-url-firefox)))

  (defun user-erc-part-reason (&optional s)
    (or s (format "(part-or-quit)")))

  (setq erc-quit-reason 'user-erc-part-reason)
  (setq erc-part-reason 'user-erc-part-reason)

  (setq erc-modules
        '(pcomplete netsplit fill button match track completion readonly networks ring
                    autojoin noncommands irccontrols move-to-prompt stamp menu list
                    notifications))

  (setq erc-timestamp-only-if-changed-flag nil
        erc-timestamp-format "%I:%M:%S "
        erc-insert-timestamp-function 'erc-insert-timestamp-left)
  
  (setq erc-format-query-as-channel-p t
        erc-track-priority-faces-only 'all
        erc-track-faces-priority-list
        '(erc-error-face
          erc-current-nick-face
          erc-keyword-face
          erc-nick-msg-face
          erc-direct-msg-face
          erc-dangerous-host-face
          erc-notice-face
          erc-prompt-face)
        erc-track-exclude-types
        '("JOIN" "NICK" "PART" "QUIT" "MODE"
          "324" "329" "332" "333" "353" "477"))
  
  (defadvice erc-track-find-face (around erc-track-find-face-promote-query activate)
    (if (erc-query-buffer-p) 
        (setq ad-return-value (intern "erc-current-nick-face"))
      ad-do-it))

  (defadvice erc-track-modified-channels (around erc-track-modified-channels-promote-query activate)
    (if (erc-query-buffer-p) (setq erc-track-priority-faces-only 'nil))
    ad-do-it
    (if (erc-query-buffer-p) (setq erc-track-priority-faces-only 'all)))
  
  (setq erc-nick "zdm"
        erc-user-full-name "zdm"
        erc-system-name "c"
        erc-email-userid "zdm")

  (setq erc-disable-ctcp-replies t)

  (setq erc-fill-prefix nil
        erc-fill-column 120)
  
  (setq erc-flood-protect nil)
  
  (setq erc-auto-query 'buffer)
  
  (setq erc-prompt ">")

  (setq erc-format-nick-function 'erc-format-@nick)

  (setq erc-after-connect nil)
  
  (setq erc-interpret-mirc-color t
        erc-interpret-controls-p t)

  (setq erc-server-coding-system '(utf-8 . utf-8))

  (setq erc-prompt-for-password nil)

  (defun user-erc-servers-connect ()
    (interactive)
    (erc-tls :server "lainchan.org" :port 6697))

  (defalias 'irc 'user-erc-servers-connect)

  ;; https://emacs.stackexchange.com/a/39212
  (defun basil-default-completion ()
    "Locally revert completion variables to their default values."
    (setq-local completing-read-function #'completing-read-default)
    (setq-local completion-in-region-function #'completion--in-region))

  :hook
  ((erc-insert-post erc-send-post) . erc-save-buffer-in-logs)
  ((erc-mode) . basil-default-completion)
  :config
  (load (concat user-utils "erc-faces"))
  
  (erc-spelling-mode)
  (erc-autojoin-mode)

  (erc-update-modules)

  (erc-notifications-disable)
  (add-hook 'focus-in-hook 'erc-notifications-disable)
  (add-hook 'focus-out-hook 'erc-notifications-enable))