;;; bootstrap.el

(eval-when-compile (require 'cl))

;; Shut up byte-compiler!
(defvar narf-current-theme)
(defvar narf-current-font)

;; Global constants
(eval-and-compile
  (defconst narf-default-theme 'wombat)
  (defconst narf-default-font  nil)

  (defconst narf-emacs-dir     (expand-file-name "." user-emacs-directory))
  (defconst narf-core-dir      (concat narf-emacs-dir "/core"))
  (defconst narf-modules-dir   (concat narf-emacs-dir "/modules"))
  (defconst narf-private-dir   (concat narf-emacs-dir "/private"))
  (defconst narf-packages-dir  (concat narf-emacs-dir "/.cask/" emacs-version "/elpa"))
  (defconst narf-script-dir    (concat narf-emacs-dir "/scripts"))
  (defconst narf-snippet-dirs  (list (concat narf-private-dir "/snippets")
                                     (concat narf-private-dir "/templates")))
  ;; Hostname and emacs version-based elisp temp directories
  (defconst narf-temp-dir      (format "%s/cache/%s/%s.%s/"
                                       narf-private-dir (system-name)
                                       emacs-major-version emacs-minor-version))

  (defconst IS-MAC     (eq system-type 'darwin))
  (defconst IS-LINUX   (eq system-type 'gnu/linux))
  (defconst IS-WINDOWS (eq system-type 'windows-nt))

  ;; Ensure that cask is in the right place
  ;; (let ((cask-dir (cond (IS-MAC "/usr/local/share/emacs/site-lisp/cask")
  ;;                       (t "~/.cask"))))
  ;;   (unless (file-exists-p cask-dir)
  ;;     (error "Cask folder not found"))
  ;;   (push cask-dir load-path))

  ;; Helper for traversing subdirectories recursively
  (defun --subdirs (path &optional include-self)
    (let ((result (if include-self (list path) (list))))
      (dolist (file (ignore-errors (directory-files path t "^[^.]" t)))
        (when (file-directory-p file)
          (push file result)))
      result)))


;;
;; Bootstrap
;;

(defun narf (packages)
  "Bootstrap NARF emacs and initialize PACKAGES"
  ;; stop package.el from being annoying. NARF relies entirely on Cask.
  (setq-default
   package--init-file-ensured t
   package-enable-at-startup nil
   gc-cons-threshold 4388608)

  ;; prematurely optimize for faster startup
  (let ((gc-cons-threshold  169715200)
        (gc-cons-percentage 0.3)
        file-name-handler-alist)

    ;; Scan various folders to populate the load-paths
    (defvar narf--load-path load-path)
    (setq load-path
          (append (list narf-private-dir)
                  (--subdirs narf-core-dir t)
                  (--subdirs narf-modules-dir t)
                  (--subdirs narf-packages-dir)
                  (--subdirs (expand-file-name "../bootstrap" narf-packages-dir))
                  narf--load-path)
          custom-theme-load-path
          (append (list (expand-file-name "themes/" narf-private-dir))
                  custom-theme-load-path))

    (require 'f)
    (require 'dash)
    (require 's)

    ;; Load local settings, if available
    (when (file-exists-p "~/.emacs.local.el")
      (load "~/.emacs.local.el"))

    ;; Global settings
    (setq narf-current-theme narf-default-theme
          narf-current-font  narf-default-font)

    ;; Load 'em up!
    (load-theme narf-current-theme t)
    (mapc 'require packages)

    (defun display-startup-echo-area-message ()
      (message ":: Loaded in %s" (emacs-init-time)))))

;;; bootstrap.el ends here