;;; init.el --- Configuration entry point -*- lexical-binding: t -*-
;;; Commentary:
;;; Code:

;; Set package dir to follow no-littering conventions
(setq package-user-dir "~/.emacs.d/var/elpa")

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

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

;; use-package
(eval-when-compile
  (setq use-package-always-ensure t)
  (require 'use-package))

;; no-littering
(use-package no-littering
  :config
  (no-littering-theme-backups)
  (setq custom-file (no-littering-expand-etc-file-name "custom.el")))

;; diminish
(use-package diminish
  :config
  (diminish 'abbrev-mode))

;; basic stuff
(use-package emacs
  :hook ((emacs-lisp-mode . my/-emacs-lisp-mode-setup-evil-lookup)
         (prog-mode . my/enable-electric-pair-mode))
  :init
  (defun my/-emacs-lisp-mode-setup-evil-lookup ()
    (setq-local evil-lookup-func
                #'my/describe-symbol-at-point))
  (defun my/enable-electric-pair-mode ()
    (electric-pair-local-mode 1))
  (defun my/describe-symbol-at-point ()
    "Calls `describe-symbol' on the return value of `form-at-point'."
    (interactive)
    (let ((form (form-at-point)))
      (if (consp form)
          (describe-symbol (cadr form))
        (describe-symbol form))))

  ;; Terminal mouse support
  (xterm-mouse-mode 1)

  ;; Make show paren instant
  (setq show-paren-delay 0)
  (show-paren-mode 1)

  ;; Display line numbers
  (global-display-line-numbers-mode 1)

  ;; Show some more context arround the point
  (setq scroll-margin 2)

  ;; Allow the frame to be any size
  (setq frame-resize-pixelwise t)

  ;; Disable startup screen
  (setq inhibit-startup-screen t)

  ;; show column numbers
  (column-number-mode 1)

  ;; Disable the menu and tool bars
  (menu-bar-mode -1)
  (tool-bar-mode -1)

  ;; No scroll bars
  (scroll-bar-mode -1)

  ;; Visual line mode
  (global-visual-line-mode 1)

  ;; Set fonts
  (add-to-list 'default-frame-alist '(font . "FiraCode Nerd Font Mono-12"))

  ;; Some settings for programming
  (setq-default indent-tabs-mode nil
		        tab-width 4
                c-basic-offset 4
                indent-line-function 'insert-tab)

  ;; Tree sitter download locations
  (setq treesit-language-source-alist
        '((c "https://github.com/tree-sitter/tree-sitter-c")
          (cpp "https://github.com/tree-sitter/tree-sitter-cpp")
          (java "https://github.com/tree-sitter/tree-sitter-java")
          (python "https://github.com/tree-sitter/tree-sitter-python")
          (rust "https://github.com/tree-sitter/tree-sitter-rust")))
  ;; Tree sitter major mode conversions
  (setq major-mode-remap-alist
        '((c-mode . c-ts-mode)
          (java-mode . java-ts-mode)
          (rust-mode . rust-ts-mode))))

(use-package recentf
  :config
  (recentf-mode 1))

;; evil
(use-package evil
  :init
  (setq evil-want-integration t
        evil-want-keybinding nil
        evil-undo-system 'undo-redo
  evil-search-module 'isearch)
  :config
  (evil-mode 1)
  (evil-define-key '(normal visual motion) proced-mode-map
                   "u" #'proced-unmark)
  (evil-define-key '(normal visual motion) dired-mode-map
                   "u" #'dired-unmark))
(use-package evil-collection
  :diminish evil-collection-unimpaired-mode
  :config
  (evil-collection-init))
(use-package evil-surround
  :config
  (global-evil-surround-mode 1))
(use-package evil-terminal-cursor-changer 
  :config
  (evil-terminal-cursor-changer-activate))

;; which-key
(use-package which-key
  :diminish which-key-mode
  :config
  (which-key-mode 1))

;; avy
(use-package avy
  :bind (("C-c C-j" . avy-resume)
         ("M-s s" . evil-avy-goto-char-2)
         ("M-s S" . evil-avy-goto-line))
  :init
  (define-minor-mode my/evil-avy-mode
    "A minor mode for binding avy commands to s and S in evil's normal and
visual states."
    :keymap (make-sparse-keymap))
  (evil-define-key '(normal visual operator motion) my/evil-avy-mode-map
                   "s" #'evil-avy-goto-char-2
                   "S" #'evil-avy-goto-line)
  (define-globalized-minor-mode my/evil-avy-global-mode my/evil-avy-mode
    (lambda () (my/evil-avy-mode 1))
    :predicate '((not magit-mode dired-mode proced-mode) t))
  (my/evil-avy-global-mode 1)
  :config
  (avy-setup-default))

;; ace-window
(use-package ace-window
  :diminish ace-window-mode
  :bind ("M-o" . ace-window)
  :init
  (setq aw-scope 'frame
        aw-minibuffer-flag t))

;; savehist
(use-package savehist
  :config
  (savehist-mode 1))

;; vertico
(use-package vertico
  :bind (:map vertico-map
              ("C-S-k" . kill-line)
              ("C-k" . vertico-previous)
              ("C-j" . vertico-next)
              ("RET" . vertico-directory-enter)
              ("DEL" . vertico-directory-delete-char)
              ("M-DEL" . vertico-directory-delete-word))
  :init
  (setq vertico-cycle t
        enable-recursive-minibuffers t
        read-extended-command-predicate #'command-completion-default-include-p
        minibuffer-prompt-properties '(read-only t
                                       cursor-intangible t
                                       face minibuffer-prompt))
  (add-hook 'minibuffer-setup-hook #'cursor-intangible-mode)
  (vertico-mode 1))

;; orderless
(use-package orderless
  :autoload orderless-define-completion-style
  :hook (text-mode . my/-setup-text-mode-completion-styles)
  :init
  (defun my/-setup-text-mode-completion-styles ()
    (setq-local completion-styles '(basic)))
  (orderless-define-completion-style my/orderless-with-initialism
    (orderless-matching-styles '(orderless-initialism
                                 orderless-literal
                                 orderless-regexp)))
  (setq completion-styles '(orderless basic)
        completion-category-defaults nil
        completion-category-overrides '((file
                                         (styles basic partial-completion))
                                        (command
                                         (my/orderless-with-initialism basic))
                                        (eglot
                                         (orderless basic)))))

;; marginalia
(use-package marginalia
  :bind (:map minibuffer-local-map
         ("M-a" . marginalia-cycle))
  :init
  (marginalia-mode 1))

;; embark
(use-package embark
  :bind (("C-." . embark-act)
	 ("C-;" . embark-dwim))
  :init
  (setq embark-quit-after-action nil)
  (add-to-list 'display-buffer-alist
             '("\\`\\*Embark Collect \\(Live\\|Completions\\)\\*"
               nil
               (window-parameters (mode-line-format . none)))))

;; consult
(use-package consult
  :bind (("C-s" . consult-line)
         ("C-x b" . consult-buffer)
         ("C-S-s" . consult-ripgrep)
         ("C-x C-S-f" . consult-fd)
         ("C-x C-m" . consult-man)
         ("C-h TAB" . consult-info)
         ("C-h C-m" . my/consult-emacs-info)
         ("C-x c k" . consult-keep-lines)
         ("C-x c f" . consult-focus-lines)
         ("C-x c r" . consult-recent-file)
         ("C-x c b" . consult-bookmark)
         ("M-g i" . consult-imenu)
         ("M-g I" . consult-imenu-multi)
         ("M-g r" . consult-imenu-multi))
  :init
  (defun my/consult-emacs-info ()
    "`consult-info' for emacs specific pages."
    (interactive)
    (consult-info "emacs" "efaq" "cl" "compat" "elisp"))
  (evil-declare-motion #'consult-line))

;; integration for embark and consult
(use-package embark-consult
  :hook (embark-collect-mode . consult-preview-at-point-mode))

;; corfu (autocomplete)
(use-package corfu
  :bind (("M-<tab>" . completion-at-point)
         :map corfu-map
         ("M-SPC" . corfu-insert-separator)
         ("M-m" . my/corfu-move-to-minibuffer))
  :init
  (defun my/corfu-move-to-minibuffer ()
    (interactive)
    (when completion-in-region--data
      (let ((completion-extra-properties corfu--extra)
            completion-cycle-threshold completion-cycling)
        (apply #'consult-completion-in-region completion-in-region--data))))
  (setq corfu-cycle t
        corfu-auto t
        corfu-on-exact-match nil
        completion-cycle-threshold 3)
  (global-corfu-mode 1)
  (corfu-popupinfo-mode 1)
  :config
  (add-to-list 'corfu-continue-commands #'corfu-move-to-minibuffer))
(use-package corfu-terminal
  :init
  (corfu-terminal-mode 1))

;; cape (a bunch of capfs!)
(use-package cape
  :bind (("M-p" . cape-dabbrev)
         ("M-P" . cape-line))
  :hook (text-mode . my/-cape-setup-text-mode)
  :init
  (defun my/-cape-setup-text-mode ()
    (setq-local completion-at-point-functions
                '(cape-dict cape-dabbrev)))
  (add-to-list 'completion-at-point-functions #'cape-file))

;; xref
(use-package xref
  :init
  (evil-define-key '(normal motion) 'global
       "gr" #'xref-find-references)
  (setq xref-show-xrefs-function #'consult-xref
  xref-show-definitions-function #'consult-xref))

;; popup.el
(use-package popup)

;; flymake
(use-package flymake
  :bind (:map flymake-mode-map
              ("C-c e" . my/flymake-show-diagnostic-at-point)
              ("C-c C-e" . consult-flymake))
  :hook (emacs-lisp-mode . my/enable-flymake-mode)
  :init
  (defun my/flymake-show-diagnostic-at-point ()
    (interactive)
    (if-let ((pos (point))
             (diag (and flymake-mode
                        (get-char-property pos 'flymake-diagnostic)))
             (message (flymake--diag-text diag)))
        (popup-tip message)))
  (defun my/enable-flymake-mode ()
    (flymake-mode 1)))

;; eldoc
(use-package eldoc
  :diminish eldoc-mode
  :init
  (set eldoc-echo-area-use-multiline-p nil))

;; eglot
(use-package eglot
  :hook (((c-ts-mode c++-ts-mode java-ts-mode rust-ts-mode
           python-ts-mode) . eglot-ensure)
         (eglot-managed-mode . my/-eglot-setup))
  :init
  (defun my/-eglot-setup ()
    "Setup eldoc variables for `eglot-managed-mode-hook'."
    (setq-local eldoc-echo-area-use-multiline-p
                nil)
    (eglot-inlay-hints-mode -1))
  (advice-add 'eglot-completion-at-point :around #'cape-wrap-buster)
  (setq eglot-autoshutdown t))

;; rust
(use-package rust-mode)

;; json
(use-package json-mode)

;; vterm
(use-package vterm
  :bind ("C-x C-a" . vterm))

;; proced
(use-package proced
  :bind ("C-x o" . proced)
  :init
  (setq proced-auto-update-flag t
        proced-auto-update-interval 1))

;; dired
(use-package dired
  :ensure nil
  :init
  (evil-define-key '(normal visual motion) dired-mode-map
                   "u" #'dired-unmark
                   "U" #'dired-unmark-all-marks)
  (evil-define-key '(normal visual motion) wdired-mode-map
                   "u" #'dired-unmark
                   "U" #'dired-unmark-all-marks))

;; magit
(use-package magit
  :bind ("C-x C-m" . magit)
  :init
  (evil-define-key '(normal visual motion) magit-mode-map
                   "s" #'magit-stage-file
                   "S" #'magit-stage-modified))

;; rainbow-delimiters
(use-package rainbow-delimiters
  :hook (prog-mode . rainbow-delimiters-mode))

;; Theme (doom-themes)
(use-package doom-themes
  :config
  (load-theme 'doom-molokai t)
  (doom-themes-org-config))

;; solaire-mode
(use-package solaire-mode
  :config
  (solaire-global-mode 1))