(use-package go-mode
  :ensure t
  :after (exec-path-from-shell flycheck flyspell company company-go hydra)
  :hook ((go-mode . fcuny/go-mode-setup)
         (go-mode . company-mode))
  :bind (("C-c a ?" . godoc-at-point)
         ("C-c a ." . godef-jump)
         ("C-c a a" . go-import-add))
  :custom
  (godoc-use-completing-read t)
  (gofmt-command "goimports")
  ;; see https://github.com/dominikh/go-mode.el/issues/262
  (godoc-at-point-function 'godoc-gogetdoc)
  :init
  (defun fcuny/go-mode-setup ()
    (setq tab-width 4)
    (add-hook 'before-save-hook 'gofmt-before-save))
  :config
  (when (memq window-system '(mac ns))
    (exec-path-from-shell-copy-env "GOPATH"))
  (defhydra go-hydra (:color teal :columns 3)
    "Go"
    ("r" go-guru-referrers "referrers")
    ("i" go-guru-implements "implements")
    ("d" go-guru-definition "definition")
    ("D" go-guru-describe "describe")
    ("t" go-test-current-test "run this test")
    ("f" go-test-current-file "run tests for this file"))
  (define-key go-mode-map (kbd "C-c g") 'go-hydra/body))

(use-package go-guru
  :ensure t
  :after go-mode
  :commands (go-guru-describe go-guru-freevars go-guru-implements go-guru-peers
             go-guru-referrers go-guru-definition go-guru-pointsto
             go-guru-callstack go-guru-whicherrs go-guru-callers go-guru-callees
             go-guru-expand-region)
  :config
  (unless (executable-find "guru")
    (warn "go-mode: couldn't find guru, refactoring commands won't work"))
  (add-hook 'go-mode-hook #'go-guru-hl-identifier-mode))

(use-package go-eldoc
  :ensure t
  :after go-mode
  :config
  (add-hook 'go-mode-hook 'go-eldoc-setup))

(use-package godoctor
  :ensure t
  :after go-mode)

(use-package gotest
  :ensure t
  :after go-mode)

(provide 'fcuny-go)