(defvar javascript-packages
  '(
    js2-mode
    js2-refactor
    tern
    tern-auto-complete
    )
  "List of all packages to install and/or initialize. Built-in packages
which require an initialization must be listed explicitly in the list.")

(defun javascript/init-js2-mode ()
  (use-package js2-mode
    :defer t
    :init (add-to-list 'auto-mode-alist '("\\.js\\'" . js2-mode))
    :config
    (progn
      (spacemacs/declare-prefix-for-mode 'js2-mode "m" "major mode")

      (evil-leader/set-key-for-mode 'js2-mode "mw" 'js2-mode-toggle-warnings-and-errors)

      (spacemacs/declare-prefix-for-mode 'js2-mode "mz" "folding")
      (evil-leader/set-key-for-mode 'js2-mode "mzc" 'js2-mode-hide-element)
      (evil-leader/set-key-for-mode 'js2-mode "mzo" 'js2-mode-show-element)
      (evil-leader/set-key-for-mode 'js2-mode "mzr" 'js2-mode-show-all)
      (evil-leader/set-key-for-mode 'js2-mode "mze" 'js2-mode-toggle-element)
      (evil-leader/set-key-for-mode 'js2-mode "mzF" 'js2-mode-toggle-hide-functions)
      (evil-leader/set-key-for-mode 'js2-mode "mzC" 'js2-mode-toggle-hide-comments))))

(defun javascript/init-js2-refactor ()
  (use-package js2-refactor
    :defer t
    :init (eval-after-load 'js2-mode '(require 'js2-refactor))
    :config
    (progn
      (spacemacs/declare-prefix-for-mode 'js2-mode "mr" "refactor")

      (spacemacs/declare-prefix-for-mode 'js2-mode "mr3" "ternary")
      (evil-leader/set-key-for-mode 'js2-mode "mr3i" 'js2r-ternary-to-if)

      (spacemacs/declare-prefix-for-mode 'js2-mode "mra" "add/args")
      (evil-leader/set-key-for-mode 'js2-mode "mrag" 'js2r-add-to-globals-annotation)
      (evil-leader/set-key-for-mode 'js2-mode "mrao" 'js2r-arguments-to-object)

      (spacemacs/declare-prefix-for-mode 'js2-mode "mrb" "barf")
      (evil-leader/set-key-for-mode 'js2-mode "mrba" 'js2r-forward-barf)

      (spacemacs/declare-prefix-for-mode 'js2-mode "mrc" "contract")
      (evil-leader/set-key-for-mode 'js2-mode "mrca" 'js2r-contract-array)
      (evil-leader/set-key-for-mode 'js2-mode "mrco" 'js2r-contract-object)
      (evil-leader/set-key-for-mode 'js2-mode "mrcu" 'js2r-contract-function)

      (spacemacs/declare-prefix-for-mode 'js2-mode "mre" "expand/extract")
      (evil-leader/set-key-for-mode 'js2-mode "mrea" 'js2r-expand-array)
      (evil-leader/set-key-for-mode 'js2-mode "mref" 'js2r-extract-function)
      (evil-leader/set-key-for-mode 'js2-mode "mrem" 'js2r-extract-method)
      (evil-leader/set-key-for-mode 'js2-mode "mreo" 'js2r-expand-object)
      (evil-leader/set-key-for-mode 'js2-mode "mreu" 'js2r-expand-function)
      (evil-leader/set-key-for-mode 'js2-mode "mrev" 'js2r-extract-var)

      (spacemacs/declare-prefix-for-mode 'js2-mode "mri" "inline/inject/introduct")
      (evil-leader/set-key-for-mode 'js2-mode "mrig" 'js2r-inject-global-in-iife)
      (evil-leader/set-key-for-mode 'js2-mode "mrip" 'js2r-introduce-parameter)
      (evil-leader/set-key-for-mode 'js2-mode "mriv" 'js2r-inline-var)

      (spacemacs/declare-prefix-for-mode 'js2-mode "mrl" "localize/log")
      (evil-leader/set-key-for-mode 'js2-mode "mrlp" 'js2r-localize-parameter)
      (evil-leader/set-key-for-mode 'js2-mode "mrlt" 'js2r-log-this)

      (spacemacs/declare-prefix-for-mode 'js2-mode "mrr" "rename")
      (evil-leader/set-key-for-mode 'js2-mode "mrrv" 'js2r-rename-var)

      (spacemacs/declare-prefix-for-mode 'js2-mode "mrs" "split/slurp")
      (evil-leader/set-key-for-mode 'js2-mode "mrsl" 'js2r-forward-slurp)
      (evil-leader/set-key-for-mode 'js2-mode "mrss" 'js2r-split-string)
      (evil-leader/set-key-for-mode 'js2-mode "mrsv" 'js2r-split-var-declaration)

      (spacemacs/declare-prefix-for-mode 'js2-mode "mrt" "toggle")
      (evil-leader/set-key-for-mode 'js2-mode "mrtf" 'js2r-toggle-function-expression-and-declaration)

      (spacemacs/declare-prefix-for-mode 'js2-mode "mru" "unwrap")
      (evil-leader/set-key-for-mode 'js2-mode "mruw" 'js2r-unwrap)

      (spacemacs/declare-prefix-for-mode 'js2-mode "mrv" "var")
      (evil-leader/set-key-for-mode 'js2-mode "mrvt" 'js2r-var-to-this)

      (spacemacs/declare-prefix-for-mode 'js2-mode "mrw" "wrap")
      (evil-leader/set-key-for-mode 'js2-mode "mrwi" 'js2r-wrap-buffer-in-iife)
      (evil-leader/set-key-for-mode 'js2-mode "mrwl" 'js2r-wrap-in-for-loop)

      (evil-leader/set-key-for-mode 'js2-mode "mk" 'js2r-kill)
      (evil-leader/set-key-for-mode 'js2-mode "xmj" 'js2r-move-line-down)
      (evil-leader/set-key-for-mode 'js2-mode "xmk" 'js2r-move-line-up))))

(defun javascript/init-tern ()
  (use-package tern
    :defer t
    :init (add-hook 'js2-mode-hook (lambda () (tern-mode t)))
    :config
    (progn
      (spacemacs/declare-prefix-for-mode 'js2-mode "mt" "tern")
      (evil-leader/set-key-for-mode 'js2-mode "m." 'tern-find-definition)
      (evil-leader/set-key-for-mode 'js2-mode "m," 'tern-pop-find-definition)
      (evil-leader/set-key-for-mode 'js2-mode "mf" 'tern-find-definition-by-name)
      (evil-leader/set-key-for-mode 'js2-mode "mc" 'tern-rename-variable)
      (evil-leader/set-key-for-mode 'js2-mode "mt" 'tern-get-type)
      (evil-leader/set-key-for-mode 'js2-mode "mg" 'tern-get-docs))))

(defun javascript/init-tern-auto-complete ()
  (use-package tern-auto-complete
    :defer t
    :config (tern-ac-setup)))