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;; Modern interactive completion framework for the minibuffer
(use-package vertico
  :hook
  (after-init . vertico-mode)           ;; Enable vertico after Emacs has initialized.
  :custom
  (vertico-cycle nil)                   ;; Do not cycle through candidates when reaching the end of the list.
  :config
  ;; Customize the display of the current candidate in the completion list.
  ;; This will prefix the current candidate with “» ” to make it stand out.
  ;; Reference: https://github.com/minad/vertico/wiki#prefix-current-candidate-with-arrow
  (advice-add #'vertico--format-candidate :around
              (lambda (orig cand prefix suffix index _start)
                (setq cand (funcall orig cand prefix suffix index _start))
                (concat
                 (if (= vertico--index index)
                     (propertize "» " 'face '(:foreground "#80adf0" :weight bold))
                   "  ")
                 cand))))

(use-package which-key
  :ensure nil
  :config
  (which-key-mode 1))

(use-package orderless
  :defer t                                    ;; Load Orderless on demand.
  :after vertico                              ;; Ensure Vertico is loaded before Orderless.
  :init
  (setq completion-styles '(orderless basic)  ;; Set the completion styles.
        completion-category-defaults nil      ;; Clear default category settings.
        completion-category-overrides '((file (styles partial-completion))))) ;; Customize file completion styles.

;; Marginalia enhances the completion experience in Emacs by adding
;; additional context to the completion candidates. This includes
;; helpful annotations such as documentation and other relevant
;; information, making it easier to choose the right option.
(use-package marginalia
  :hook
  (after-init . marginalia-mode))

;;; CONSULT
;; Consult provides powerful completion and narrowing commands for Emacs.
;; It integrates well with other completion frameworks like Vertico, enabling
;; features like previews and enhanced register management. It's useful for
;; navigating buffers, files, and xrefs with ease.
(use-package consult
  :ensure t
  :defer t
  :init
  ;; Enhance register preview with thin lines and no mode line.
  (advice-add #'register-preview :override #'consult-register-window)

  ;; Use Consult for xref locations with a preview feature.
  (setq xref-show-xrefs-function #'consult-xref
        xref-show-definitions-function #'consult-xref)

  :bind (;; C-x bindings in `ctl-x-map'
         ("C-x M-:" . consult-complex-command)     ;; orig. repeat-complex-command
         ("C-x b" . consult-buffer)                ;; orig. switch-to-buffer
         ("C-x 4 b" . consult-buffer-other-window) ;; orig. switch-to-buffer-other-window
         ("C-x 5 b" . consult-buffer-other-frame)  ;; orig. switch-to-buffer-other-frame
         ("C-x t b" . consult-buffer-other-tab)    ;; orig. switch-to-buffer-other-tab
         ("C-x r b" . consult-bookmark)            ;; orig. bookmark-jump
         ("C-x p b" . consult-project-buffer)      ;; orig. project-switch-to-buffer
         ;; Custom M-# bindings for fast register access
         ("M-#" . consult-register-load)
         ("M-'" . consult-register-store)          ;; orig. abbrev-prefix-mark (unrelated)
         ("C-M-#" . consult-register)
         ;; Other custom bindings
         ("M-y" . consult-yank-pop)                ;; orig. yank-pop
         ;; M-g bindings in `goto-map'
         ("M-g e" . consult-compile-error)
         ("M-g r" . consult-grep-match)
         ("M-g f" . consult-flymake)               ;; Alternative: consult-flycheck
         ("M-g g" . consult-goto-line)             ;; orig. goto-line
         ("M-g M-g" . consult-goto-line)           ;; orig. goto-line
         ("M-g o" . consult-outline)               ;; Alternative: consult-org-heading
         ("M-g m" . consult-mark)
         ("M-g k" . consult-global-mark)
         ("M-g i" . consult-imenu)
         ("M-g I" . consult-imenu-multi)
         ;; M-s bindings in `search-map'
         ("M-s d" . consult-find)                  ;; Alternative: consult-fd
         ("M-s c" . consult-locate)
         ("M-s g" . consult-grep)
         ("M-s G" . consult-git-grep)
         ("M-s r" . consult-ripgrep)
         ("M-s l" . consult-line)
         ("M-s L" . consult-line-multi)
         ("M-s k" . consult-keep-lines)
         ("M-s u" . consult-focus-lines)
         ;; Isearch integration
         ("M-s e" . consult-isearch-history)
         :map isearch-mode-map
         ("M-e" . consult-isearch-history)         ;; orig. isearch-edit-string
         ("M-s e" . consult-isearch-history)       ;; orig. isearch-edit-string
         ("M-s l" . consult-line)                  ;; needed by consult-line to detect isearch
         ("M-s L" . consult-line-multi)            ;; needed by consult-line to detect isearch
         ;; Minibuffer history
         :map minibuffer-local-map
         ("M-s" . consult-history)                 ;; orig. next-matching-history-element
         ("M-r" . consult-history)))                ;; orig. previous-matching-history-element

(provide 'completion-config)