(use-package clang-format
  :ensure t)
(use-package projectile
  :ensure t)

;;; Code:
(defun setup-c()
  "Set up c common mode."
  (setq c++-tab-always-indent 0)
  (setq c-basic-offset 4)                  ;; Default is 2
  (setq c-indent-level 4)                  ;; Default is 2

  (setq tab-stop-list '(4 8 12 16 20 24 28 32 36 40 44 48 52 56 60))
  (setq tab-width 4)
  (c-set-offset 'brace-list-open 0)
  (c-set-offset 'substatement-open 0)
  (c-set-offset 'arglist-intro '+)
  (c-set-offset 'arglist-cont-non-empty '+)
  (c-set-offset 'arglist-close '+)
  (c-set-offset 'statement-cont 0)
  (c-set-offset 'statement-case-open 0)
  )

(setup-c)
(add-hook 'c-mode-common-hook 'setup-c)

(defun mk/cpp/generate-compile-commands-cmake()
  "Regenerates a compile_commands.json database"
  (interactive)
  (shell-command (format "cd %s && cmake -S . -B build -D CMAKE_EXPORT_COMPILE_COMMANDS=1" (projectile-project-root)))
  )

(defun mk/cpp/maybe-regenerate-compile-commands()
  (if (string= (buffer-file-name) "CMakeLists.txt")
      (mk/cpp/generate-compile-commands-cmake)))

(defun mk/cpp/clang-format-buffer-if-project-file ()
  "Run clang-format-buffer only if a .clang-format exists in the Projectile project."
  (when (and (projectile-project-p) ; inside a projectile project
             (locate-dominating-file (buffer-file-name) ".clang-format"))
    (clang-format-buffer)))

;; Add this hook to C/C++/ObjC modes
(add-hook 'c-mode-common-hook
          (lambda ()
            (add-hook 'before-save-hook
                      #'mk/cpp/clang-format-buffer-if-project-file
                      nil 'local)))

(add-hook 'after-save-hook 'mk/cpp/maybe-regenerate-compile-commands)

(provide 'cpp)
;;; cpp.el ends here