Enabling company-mode with variable setup

Question

I want to enable and disable company-mode. Would I have to reset setup variables, everytime I want to enable company-mode? Should I call company-setup before calling company-enable. Is the placement of (add-hook 'after-init-hook 'global-company-mode) correct as part of setup?

(defun company-setup ()
  "Text completion-at-point drop-down framework displaying
possible candidates at cursor point as one types."

  (interactive)

  (setq company-minimum-prefix-length 2)

  (setq company-backends '(company-dabbrev company-dabbrev-code))

  (setq company-dabbrev-other-buffers 'all)
  (setq company-dabbrev-ignore-case 'keep-prefix)

  (setq company-dabbrev-code-other-buffers 'all)
  (setq company-dabbrev-code-ignore-case t)
  (setq company-dabbrev-code-everywhere t)
   
  (add-hook 'after-init-hook 'global-company-mode))

(defun company-enable ()
  "Disables company completion"
  (interactive)
  (company-mode 1))

Answer 1

The following should enable dabbrev customizations with company-mode.

(with-eval-after-load "company"
  (setq company-minimum-prefix-length 2
        company-backends '(company-dabbrev company-dabbrev-code)
        company-dabbrev-other-buffers 'all
        company-dabbrev-ignore-case 'keep-prefix
        company-dabbrev-code-other-buffers 'all
        company-dabbrev-code-ignore-case t
        company-dabbrev-code-everywhere t))

You can now enable/disable company-mode globally "at will" with "M-x global-company-mode". You can use the after-init-hook if you want to have the mode enabled on startup.