(setq package-archives '(("gnu" . "https://mirrors.ustc.edu.cn/elpa/gnu/")
                         ("melpa" . "https://mirrors.ustc.edu.cn/elpa/melpa/")
                         ("nongnu" . "https://mirrors.ustc.edu.cn/elpa/nongnu/")))
(use-package counsel
  :ensure t)

(use-package ivy
  :ensure t
  :init
  (ivy-mode 1)
  (counsel-mode 1)
  :config
  (setq ivy-use-virtual-buffers t)
  (setq search-default-mode #'char-fold-to-regexp)
  (setq ivy-count-format "(%d/%d) ")
  :bind
  (("C-s" . 'swiper)
   ("C-x b" . 'ivy-switch-buffer)
   ("C-c v" . 'ivy-push-view)
   ("C-c s" . 'ivy-switch-view)
   ("C-c V" . 'ivy-pop-view)
   ("C-x C-@" . 'counsel-mark-ring); 在某些终端上 C-x C-SPC 会被映射为 C-x C-@，比如在 macOS 上，所以要手动设置
   ("C-x C-SPC" . 'counsel-mark-ring)
   :map minibuffer-local-map
   ("C-r" . counsel-minibuffer-history)))

(use-package ace-window
  :ensure t
  :bind (("C-x o" . 'ace-window)))

(use-package undo-tree
  :ensure t
  :init (global-undo-tree-mode)
  :custom
  (undo-tree-auto-save-history nil))

(use-package which-key
  :ensure t
  :init (which-key-mode))

(use-package marginalia
  :ensure t
  :init (marginalia-mode)
  :bind (:map minibuffer-local-map
	      ("M-A" . marginalia-cycle)))

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

 (use-package dashboard
  :ensure t
  :config
  (setq dashboard-banner-logo-title "Welcome to Emacs!") ;; 个性签名，随读者喜好设置
  ;; (setq dashboard-projects-backend 'projectile) ;; 读者可以暂时注释掉这一行，等安装了 projectile 后再使用
  (setq dashboard-startup-banner 'official) ;; 也可以自定义图片
  (setq dashboard-items '((recents  . 5)   ;; 显示多少个最近文件
			  (bookmarks . 5)  ;; 显示多少个最近书签
			  (projects . 10))) ;; 显示多少个最近项目
  (dashboard-setup-startup-hook))

(use-package highlight-symbol
  :ensure t
  :init (highlight-symbol-mode)
  :bind ("<f3>" . highlight-symbol))

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

(use-package company
  :ensure t
  :init (global-company-mode)
  :config
  (setq company-minimum-prefix-length 1) ; 只需敲 1 个字母就开始进行自动补全
  (setq company-tooltip-align-annotations t)
  (setq company-idle-delay 0.0)
  (setq company-show-numbers t) ;; 给选项编号 (按快捷键 M-1、M-2 等等来进行选择).
  (setq company-selection-wrap-around t)
  (setq company-transformers '(company-sort-by-occurrence))) ; 根据选择的频率进行排序，读者如果不喜欢可以去掉

(use-package yasnippet
  :ensure t
  :hook
  (prog-mode . yas-minor-mode)
  :config
  (yas-reload-all)
  ;; add company-yasnippet to company-backends
  (defun company-mode/backend-with-yas (backend)
    (if (and (listp backend) (member 'company-yasnippet backend))
	backend
      (append (if (consp backend) backend (list backend))
              '(:with company-yasnippet))))
  (setq company-backends (mapcar #'company-mode/backend-with-yas company-backends))
  ;; unbind <TAB> completion
  (define-key yas-minor-mode-map [(tab)]        nil)
  (define-key yas-minor-mode-map (kbd "TAB")    nil)
  (define-key yas-minor-mode-map (kbd "<tab>")  nil)
  :bind
  (:map yas-minor-mode-map ("S-<tab>" . yas-expand)))

(use-package yasnippet-snippets
  :ensure t
  :after yasnippet)

(use-package flycheck
  :ensure t
  :config
  (setq truncate-lines nil) ; 如果单行信息很长会自动换行
  :hook
  (prog-mode . flycheck-mode))

(use-package lsp-mode
  :ensure t
  :init
  ;; set prefix for lsp-command-keymap (few alternatives - "C-l", "C-c l")
  (setq lsp-keymap-prefix "C-c l"
	lsp-file-watch-threshold 500)
  :hook 
  (lsp-mode . lsp-enable-which-key-integration) ; which-key integration
  :commands (lsp lsp-deferred)
  :config
  (setq lsp-completion-provider :none) ;; 阻止 lsp 重新设置 company-backend 而覆盖我们 yasnippet 的设置
  (setq lsp-headerline-breadcrumb-enable t)
  :bind
  ("C-c l s" . lsp-ivy-workspace-symbol)) ;; 可快速搜索工作区内的符号（类名、函数名、变量名等）

(use-package lsp-ui
  :ensure t
  :config
  (define-key lsp-ui-mode-map [remap xref-find-definitions] #'lsp-ui-peek-find-definitions)
  (define-key lsp-ui-mode-map [remap xref-find-references] #'lsp-ui-peek-find-references)
  (setq lsp-ui-doc-position 'top))

(use-package lsp-ivy
  :ensure t
  :after (lsp-mode))

(use-package lsp-ivy
  :ensure t
  :after (lsp-mode))

(use-package magit
  :ensure t)

(use-package c++-mode
  :functions 			; suppress warnings
  c-toggle-hungry-state
  :hook
  (c-mode . lsp-deferred)
  (c++-mode . lsp-deferred)
  (c++-mode . c-toggle-hungry-state))

(use-package treemacs
  :ensure t
  :defer t
  :config
  (treemacs-tag-follow-mode)
  :bind
  (:map global-map
        ("M-0"       . treemacs-select-window)
        ("C-x t 1"   . treemacs-delete-other-windows)
        ("C-x t t"   . treemacs)
        ("C-x t B"   . treemacs-bookmark)
        ;; ("C-x t C-t" . treemacs-find-file)
        ("C-x t M-t" . treemacs-find-tag))
  (:map treemacs-mode-map
	("/" . treemacs-advanced-helpful-hydra)))

(use-package treemacs-projectile
  :ensure t
  :after (treemacs projectile))

(use-package lsp-treemacs
  :ensure t
  :after (treemacs lsp))


(provide 'packages)