;;; packages.el --- shell packages File for Spacemacs
;;
;; Copyright (c) 2012-2014 Sylvain Benner
;; Copyright (c) 2014-2015 Sylvain Benner & Contributors
;;
;; Author: Sylvain Benner <sylvain.benner@gmail.com>
;; URL: https://github.com/syl20bnr/spacemacs
;;
;; This file is not part of GNU Emacs.
;;
;;; License: GPLv3

(setq shell-packages
      '(
        company
        helm
        multi-term
        shell
        shell-pop
        term
        eshell
        eshell-prompt-extras
        esh-help
        magit
        ))

(defun shell/post-init-company ()
  ;; support in eshell
  (spacemacs|use-package-add-hook eshell
    :post-config
    (progn
      (setq-local company-idle-delay 0.2)
      ;; The default frontend screws everything up in short windows like
      ;; terminal often are
      (setq-local company-frontends '(company-preview-frontend))
      (push 'company-capf company-backends-eshell-mode)
      (spacemacs|add-company-hook eshell-mode))))

(defun shell/pre-init-helm ()
  (spacemacs|use-package-add-hook helm
    :post-init
    (progn
      ;; eshell
      (defun spacemacs/helm-eshell-history ()
        "Correctly revert to insert state after selection."
        (interactive)
        (helm-eshell-history)
        (evil-insert-state))
      (defun spacemacs/helm-shell-history ()
        "Correctly revert to insert state after selection."
        (interactive)
        (helm-comint-input-ring)
        (evil-insert-state))
      (defun spacemacs/init-helm-eshell ()
        "Initialize helm-eshell."
        ;; this is buggy for now
        ;; (define-key eshell-mode-map (kbd "<tab>") 'helm-esh-pcomplete)
        (evil-leader/set-key-for-mode 'eshell-mode
          "mH" 'spacemacs/helm-eshell-history)
        (define-key eshell-mode-map
          (kbd "M-l") 'spacemacs/helm-eshell-history))
      (add-hook 'eshell-mode-hook 'spacemacs/init-helm-eshell)
      ;;shell
      (evil-leader/set-key-for-mode 'shell-mode
        "mH" 'spacemacs/helm-shell-history))))

(defun shell/init-multi-term ()
  (use-package multi-term
    :defer t
    :init
    (progn
      (evil-leader/set-key "ast" 'shell-pop-multi-term)
      (defun multiterm (_)
        "Wrapper to be able to call multi-term from shell-pop"
        (interactive)
        (multi-term)))
    :config
    (progn
      (defun term-send-tab ()
        "Send tab in term mode."
        (interactive)
        (term-send-raw-string "\t"))
      (add-to-list 'term-bind-key-alist '("<tab>" . term-send-tab))

      (when (configuration-layer/package-usedp 'projectile)
        (defun projectile-multi-term-in-root ()
          "Invoke `multi-term' in the project's root."
          (interactive)
          (projectile-with-default-dir (projectile-project-root) (multi-term)))
        (evil-leader/set-key "p$t" 'projectile-multi-term-in-root)))))

(defun spacemacs/init-shell ()
  (defun shell-comint-input-sender-hook ()
    "Check certain shell commands.
 Executes the appropriate behavior for certain commands."
    (setq comint-input-sender
          (lambda (proc command)
            (cond
             ;; Check for clear command and execute it.
             ((string-match "^[ \t]*clear[ \t]*$" command)
              (comint-send-string proc "\n")
              (erase-buffer))
             ;; Check for man command and execute it.
             ((string-match "^[ \t]*man[ \t]*" command)
              (comint-send-string proc "\n")
              (setq command (replace-regexp-in-string "^[ \t]*man[ \t]*" "" command))
              (setq command (replace-regexp-in-string "[ \t]+$" "" command))
              (funcall 'man command))
             ;; Send other commands to the default handler.
             (t (comint-simple-send proc command))))))
  (add-hook 'shell-mode-hook 'shell-comint-input-sender-hook))

(defun shell/init-shell-pop ()
  (use-package shell-pop
    :defer t
    :init
    (progn
      (setq shell-pop-window-position shell-default-position
            shell-pop-window-height   shell-default-height
            shell-pop-term-shell      shell-default-term-shell
            shell-pop-full-span t)
      (defmacro make-shell-pop-command (type &optional shell)
        (let* ((name (symbol-name type)))
          `(defun ,(intern (concat "shell-pop-" name)) (index)
             (interactive "P")
             (require 'shell-pop)
             (shell-pop--set-shell-type
              'shell-pop-shell-type
              (backquote (,name
                          ,(concat "*" name "*")
                          (lambda nil (funcall ',type ,shell)))))
             (shell-pop index))))
      (make-shell-pop-command eshell)
      (make-shell-pop-command shell)
      (make-shell-pop-command term shell-pop-term-shell)
      (make-shell-pop-command multiterm)
      (make-shell-pop-command ansi-term shell-pop-term-shell)

      (defun spacemacs//term-kill-buffer-hook ()
        "Function that hook `kill-buffer-hook'."
        (when (eq major-mode 'term-mode)
          (when (term-check-proc (current-buffer))
            (term-quit-subjob))))
      (add-hook 'kill-buffer-hook 'spacemacs//term-kill-buffer-hook)

      (defun ansi-term-handle-close ()
        "Close current term buffer when `exit' from term buffer."
        (when (ignore-errors (get-buffer-process (current-buffer)))
          (set-process-sentinel (get-buffer-process (current-buffer))
                                (lambda (proc change)
                                  (when (string-match "\\(finished\\|exited\\)" change)
                                    (kill-buffer (process-buffer proc))
                                    (delete-window))))))
      (add-hook 'term-mode-hook 'ansi-term-handle-close)

      (defun spacemacs/default-pop-shell ()
        "Open the default shell in a popup."
        (interactive)
        (let ((shell (if (eq 'multi-term shell-default-shell)
                         'multiterm
                       shell-default-shell)))
          (call-interactively (intern (format "shell-pop-%S" shell)))))
      (evil-leader/set-key
        "'"   'spacemacs/default-pop-shell
        "ase" 'shell-pop-eshell
        "asi" 'shell-pop-shell
        "asm" 'shell-pop-multiterm
        "ast" 'shell-pop-ansi-term
        "asT" 'shell-pop-term))))

(defun shell/init-term ()
  (defun term-send-tab ()
    "Send tab in term mode."
    (interactive)
    (term-send-raw-string "\t"))
  ;; hack to fix pasting issue, the paste micro-state won't
  ;; work in term
  (evil-define-key 'normal term-raw-map "p" 'term-paste)
  (evil-define-key 'insert term-raw-map (kbd "C-c C-d") 'term-send-eof)
  (evil-define-key 'insert term-raw-map (kbd "<tab>") 'term-send-tab))

(defun shell/init-eshell ()
  (use-package eshell
    :defer t
    :init
    (progn
      (setq eshell-cmpl-cycle-completions nil
            ;; auto truncate after 20k lines
            eshell-buffer-maximum-lines 20000
            ;; history size
            eshell-history-size 350
            ;; buffer shorthand -> echo foo > #'buffer
            eshell-buffer-shorthand t
            ;; my prompt is easy enough to see
            eshell-highlight-prompt nil
            ;; treat 'echo' like shell echo
            eshell-plain-echo-behavior t)

      (defun spacemacs//eshell-auto-end ()
        "Move point to end of current prompt when switching to insert state."
        (when (and (eq major-mode 'eshell-mode)
                   ;; Not on last line, we might want to edit within it.
                   (not (eq (line-end-position) (point-max))))
          (end-of-buffer)))

      (defun spacemacs//init-eshell ()
        "Stuff to do when enabling eshell."
        (setq pcomplete-cycle-completions nil)
        (add-hook 'evil-insert-state-entry-hook
                  'spacemacs//eshell-auto-end nil t)
        (when (configuration-layer/package-usedp 'semantic)
          (semantic-mode -1)))
      (add-hook 'eshell-mode-hook 'spacemacs//init-eshell))
    :config
    (progn
      (require 'esh-opt)

      ;; quick commands
      (defalias 'e 'find-file-other-window)
      (defalias 'd 'dired)
      (setenv "PAGER" "cat")

      ;; support `em-smart'
      (when shell-enable-smart-eshell
        (require 'em-smart)
        (setq eshell-where-to-jump 'begin
              eshell-review-quick-commands nil
              eshell-smart-space-goes-to-end t)
        (add-hook 'eshell-mode-hook 'eshell-smart-initialize))

      ;; Visual commands
      (require 'em-term)
      (mapc (lambda (x) (push x eshell-visual-commands))
            '("el" "elinks" "htop" "less" "ssh" "tmux" "top"))

      ;; automatically truncate buffer after output
      (when (boundp 'eshell-output-filter-functions)
        (push 'eshell-truncate-buffer eshell-output-filter-functions)))))

(defun shell/init-eshell-prompt-extras ()
  (use-package eshell-prompt-extras
    :commands epe-theme-lambda
    :init
    (setq eshell-highlight-prompt nil
          eshell-prompt-function 'epe-theme-lambda)))

(defun shell/init-esh-help ()
  (use-package esh-help
    :defer t
    :init (add-hook 'eshell-mode-hook 'eldoc-mode)
    :config (setup-esh-help-eldoc)))

(defun shell/pre-init-magit ()
  (spacemacs|use-package-add-hook magit
    :post-init
    (progn
      ;; add a quick alias to open magit-status in current directory
      (defun spacemacs/eshell-magit-status ()
        "Function to open magit-status for the current directory"
        (interactive)
        (magit-status default-directory))
      (defalias 's 'spacemacs/eshell-magit-status))))