;; Initialise the package system first of all.
(require 'package)
(add-to-list 'package-archives '("melpa" . "http://melpa.org/packages/") t)

(defvar fcuny-path-emacs-var (expand-file-name "var" user-emacs-directory)
  "Path to some files for Emacs.")

(defvar fcuny-path-emacs-elpa (expand-file-name "elpa" fcuny-path-emacs-var)
  "Path to elpa's local files.")

;; where to store the packages
(setq package-user-dir fcuny-path-emacs-elpa)

;; initialize it
(package-initialize)

;; if use-package is not present, we install it
(unless (package-installed-p 'use-package)
  (package-refresh-contents)
  (package-install 'use-package))

(require 'use-package)

(defvar fcuny-path-home (getenv "HOME")
  "Path to the user's home directory.")

(defvar fcuny-path-workspace (expand-file-name "workspace" fcuny-path-home)
  "Path to the workspace.")

(defvar fcuny-path-go (expand-file-name "go" fcuny-path-workspace)
  "Path to GOPATH.")

(defvar fcuny-path-go-bin (expand-file-name "bin" fcuny-path-go)
  "Path to the go binaries.")

(defvar fcuny-path-puppet-linter-svn (expand-file-name "twitter-ops/utilities/puppet/.puppet-lint.rc" fcuny-path-workspace)
  "Path to the linter's configuration for twitter-ops.")

(defvar fcuny-projects-ignored-dirs '(".git" ".svn" "target" "elpa")
  "Ignore the following directories when browsing with projectile.")

(defvar fcuny-bookmarks-dir (expand-file-name "bookmarks" fcuny-path-emacs-var)
  "Path to save the bookmarks")

(defvar fcuny-custom-settings (expand-file-name "emacs-custom.el" fcuny-path-emacs-var)
  "Path to emacs custom variables.")

(defun fc/rename-this-buffer-and-file ()
  "Renames current buffer and file it is visiting."
  (interactive)
  (let ((name (buffer-name))
        (filename (buffer-file-name))
        (read-file-name-function 'read-file-name-default))
    (if (not (and filename (file-exists-p filename)))
        (error "Buffer '%s' is not visiting a file!" name)
      (let ((new-name (read-file-name "New name: " filename)))
        (cond ((get-buffer new-name)
               (error "A buffer named '%s' already exists!" new-name))
              (t
               (rename-file filename new-name 1)
               (rename-buffer new-name)
               (set-visited-file-name new-name)
               (set-buffer-modified-p nil)
               (message "File '%s' successfully renamed to '%s'" name (file-name-nondirectory new-name))))))))

(defun fc/check-work-machine-p ()
  "Returns t if this is a work machine"
  (string-match "tw-mbp.*" (system-name)))

(defun fc/check-source-p ()
  "Finds if the current python file is in the `source' repository."
  (and (executable-find "check.pex")
       (buffer-file-name)
       (string-match "source/.*\.py$" (buffer-file-name))))

;; set utf-8 as the default encoding
(prefer-coding-system 'utf-8-unix)
(set-terminal-coding-system 'utf-8)
(set-keyboard-coding-system 'utf-8)

;; alias yes-or-no to y-or-n
(fset 'yes-or-no-p 'y-or-n-p)

(setq auto-save-default nil)                   ;; don't auto save files
(setq auto-save-list-file-prefix nil)          ;; no backups
(setq create-lockfiles nil)                    ;; don't use a lock file
(setq custom-file fcuny-custom-settings)       ;; where to save custom settings
(setq make-backup-files nil)                   ;; really no backups
(setq minibuffer-message-timeout 0.5)          ;; How long to display an echo-area message
(setq next-screen-context-lines 5)             ;; scroll 5 lines at a time
(setq require-final-newline t)                 ;; ensure newline exists at the end of the file
(setq ring-bell-function 'ignore)              ;; really no bell
(setq tab-always-indent 'complete)             ;; when using TAB, always indent
(setq visible-bell nil)                        ;; no bell
(setq column-number-mode t)                    ;; show column number in the mode line
(setq use-package-always-ensure t)             ;; always ensure packages are present
(setq-default indent-tabs-mode nil)            ;; turn off tab indentation
(setq-default cursor-type 'hbar)               ;; cursor is a horizontal bar

(set-face-attribute 'default nil :height 130 :weight 'normal :width 'normal)

(fringe-mode '(8 . 8))                         ;; size of the fringe

(global-set-key (kbd "M-j") 'join-line)                           ;; Remap join-line to M-j where it's easier to get to.
(global-set-key (kbd "<s-return>") 'toggle-frame-fullscreen)      ;; Shift-Return switch to full-screen

(custom-set-variables
 '(tool-bar-mode nil)
 '(scroll-bar-mode nil)
 '(use-file-dialog nil)
 '(use-dialog-box nil)
 '(blink-cursor-mode nil)
 '(inhibit-startup-screen t)
 '(inhibit-startup-message t)
 '(inhibit-startup-echo-area-message t))

;; when using darwin, I don't want to use the native fullscreen mode (it opens a new workspace)
(when (eq system-type 'darwin)
  (setq ns-use-native-fullscreen nil))

(use-package auto-package-update
  :custom
  (auto-package-update-delete-old-versions t)
  (auto-package-update-hide-results t)
  (auto-package-update-last-update-day-filename (expand-file-name "last-package-update-day" fcuny-path-emacs-var))
  :hook
  (after-init . auto-package-update-maybe))

(use-package bookmark
  :custom
  (bookmark-default-file fcuny-bookmarks-dir)
  (bookmark-save-flag 1))

(use-package autorevert
  :config
  (global-auto-revert-mode t))

(use-package midnight
  :config
  (midnight-mode t))

(use-package autorevert
  :config
  (setq global-auto-revert-non-file-buffers t)
  (setq auto-revert-verbose nil)
  (global-auto-revert-mode t))

(use-package recentf
  :config
  (setq recentf-save-file (expand-file-name "var/recentf" user-emacs-directory)))

(use-package server
  :if window-system
  :init
  (add-hook 'after-init-hook 'server-start))

(use-package hl-line
  :config
  (global-hl-line-mode t))

(use-package tramp
  :custom
  (tramp-default-method "ssh")
  (tramp-persistency-file-name (expand-file-name "var/tramp" user-emacs-directory)))

(use-package whitespace
  :custom
  (whitespace-style '(face trailing))
  (show-trailing-whitespace t)
  :hook (whitespace-mode))

(use-package counsel
  :bind
  (("M-x"     . counsel-M-x)
   ("C-s"     . counsel-grep-or-swiper)
   ("C-x C-f" . counsel-find-file)
   ("C-x C-r" . counsel-recentf)
   ("C-c f"   . counsel-git)
   ("C-c s"   . counsel-git-grep)
   ("C-c /"   . counsel-ag))
  :custom
  (counsel-find-file-at-point t)
  :config
  (use-package swiper)
  (use-package counsel-projectile))

(use-package ivy
  :diminish (ivy-mode . "")
  :bind ("C-c m" . ivy-switch-project)
  :config
  (ivy-mode 1)
  (setq ivy-use-virtual-buffers t
        ivy-height 10
        ivy-count-format "(%d/%d) "
        ivy-initial-inputs-alist nil
        ivy-use-ignore-default 'always
        ivy-ignore-buffers '("company-statistics-cache.el" "company-statistics-autoload.el")
        ivy-re-builders-alist '((swiper . ivy--regex-ignore-order)
                                (t      . ivy--regex-fuzzy)
                                (t      . ivy--regex-ignore-order)))

  (defun ivy-switch-project ()
    (interactive)
    (ivy-read
     "Switch to project: "
     (if (projectile-project-p)
         (cons (abbreviate-file-name (projectile-project-root))
               (projectile-relevant-known-projects))
       projectile-known-projects)
     :action #'projectile-switch-project-by-name))

  (ivy-set-actions
   'ivy-switch-project
   '(("d" dired "Open Dired in project's directory")
     ("v" counsel-projectile "Open project root in vc-dir or magit")
     ("c" projectile-compile-project "Compile project")
     ("r" projectile-remove-known-project "Remove project(s)"))))

(use-package projectile
  :diminish projectile-mode
  :bind-keymap ("C-c p" . projectile-command-map)

  :init
  (add-hook 'after-init-hook #'projectile-mode)

  :config
  (setq projectile-switch-project-action 'projectile-dired
        projectile-enable-caching t
        projectile-completion-system 'ivy
        projectile-known-projects-file (expand-file-name "var/projectile-bookmarks.eld" user-emacs-directory)
        projectile-cache-file (expand-file-name "var/projectile.cache" user-emacs-directory)
        projectile-globally-ignored-directories (append fcuny-projects-ignored-dirs
                                                        projectile-globally-ignored-directories)
        projectile-globally-ignored-files (append
                                                  projectile-globally-ignored-files)))

(use-package ag
  :bind (:map ag-mode-map
              ("p" . compilation-previous-error)
              ("n" . compilation-next-error)
              ("N" . compilation-next-file)
              ("P" . compilation-previous-file))
  :custom
  (ag-highlight-search t)
  (ag-reuse-buffers t)
  (ag-reuse-window t))

(use-package dired
  :ensure nil
  :defer t
  :bind ("C-x C-d"  . dired)
  :init
  (setq-default dired-dwim-target t)
  (setq dired-recursive-deletes 'always)
  (setq dired-recursive-copies 'always)

  (let ((gls (executable-find "/opt/twitter/bin/gls")))
    (when gls (setq insert-directory-program gls))))

(use-package ibuffer
  :bind ("C-x C-b" . ibuffer))

(use-package flycheck
  :config
  (progn
    (add-hook 'prog-mode-hook 'flycheck-mode)
    (setq flycheck-highlighting-mode 'lines)
    (setq flycheck-check-syntax-automatically '(mode-enabled save))
    (setq flycheck-checkers (delq 'emacs-lisp-checkdoc flycheck-checkers))
    (if (fc/check-work-machine-p)
      (flycheck-define-checker fc/twitter-source-check
        "A syntax checker for python source code in Source, using `check.pex'"
        :command ("check.pex" source)
        :error-patterns ((error line-start (id (1+ nonl)) ":ERROR" (1+ nonl) ":" line (message) line-end)
                         (warning line-start (id (1+ nonl)) ":WARNING" (1+ nonl) ":" line (message) line-end))
        :predicate fc/check-source-p
        :modes (python-mode))
      (add-to-list 'flycheck-checkers 'fc/twitter-source-check))))

(use-package ispell
  :config
  (when (executable-find "aspell")
    (setq ispell-program-name "aspell"
          ispell-list-command "--list")))

(use-package flyspell-correct)

(use-package flyspell
  :hook ((text-mode-hook . flyspell-mode)
         (prog-mode-hook . flyspell-prog-mode)))

(use-package markdown-mode
  :after (flyspell)
  :mode (("\\.md\\'" . gfm-mode)
         ("\\.markdown\\'" . gfm-mode))
  :hook (markdown-mode . flyspell-mode)
  :init (setq markdown-command "pandoc -f markdown_github -c https://goo.gl/OVmlwT --self-contained"
              markdown-header-scaling 't)
  :config
  (add-hook 'gfm-mode-hook 'visual-line-mode))

(use-package exec-path-from-shell
  :if (memq window-system '(mac ns))
  :config
  (exec-path-from-shell-initialize)
  (if (fc/check-work-machine-p)
      (dolist (var '("GEM_HOME" "GEM_PATH" "MY_RUBY_HOME"))
        (unless (getenv var)
          (exec-path-from-shell-copy-env var)))))

;; auto close bracket, parenthesis insertion
(electric-pair-mode 1)

(use-package paren
  :custom
  (show-paren-delay 0)
  :config
  (show-paren-mode 1))

(use-package lisp-mode
  :ensure f
  :bind
  (("C-c C-e" . eval-buffer)
   ("C-c C-r" . eval-region)))

(use-package eldoc
  :ensure t
  :hook (emacs-lisp-mode-hook))

(use-package pants
  :load-path (lambda () (expand-file-name  "github.com/fcuny/pants.el/" fcuny-path-workspace))
  :custom
  (pants-completion-system 'ivy)
  (pants-source-tree-root (expand-file-name "git.twitter.biz/source" fcuny-path-workspace))
  (pants-bury-compilation-buffer t)
  (pants-extra-args "-q")
  :bind (("C-c b" . pants-find-build-file)
         ("C-c r" . pants-run-binary)
         ("C-c t" . pants-run-test))
  :init
  (if (fc/check-work-machine-p)
      (add-to-list 'auto-mode-alist '("BUILD" . python-mode))))

(use-package make-mode
  :ensure t
  :config
  (add-hook 'makefile-mode-hook (lambda () (setq-local tab-width 2))))

(use-package company
  :ensure t
  :diminish company-mode
  :config
  (global-company-mode)
  (setq company-global-modes '(not term-mode)
        company-idle-delay 0.3
        company-minimum-prefix-length 3
        company-selection-wrap-around t
        company-show-numbers t
        company-tooltip-align-annotations t
        company-require-match nil))

(use-package magit
  :ensure t
  :mode (("differential-update-comments" . git-commit-mode)
         ("new-commit"                   . git-commit-mode))
  :bind (("C-x g s" . magit-status)
         ("C-x g b" . magit-checkout))
  :init
  (progn
    (setq magit-completing-read-function 'ivy-completing-read))

  :config
  (progn
    (global-git-commit-mode)

    ;; I don't care about other VC backend for work
    (if (fc/check-work-machine-p)
      (setf vc-handled-backends nil
            vc-follow-symlinks t))

    (use-package git-commit :ensure t)

    (add-hook 'magit-log-edit-mode-hook
              #'(lambda ()
                  (set-fill-column 72)
                  (flyspell-mode)))))

(use-package go-mode
  :ensure t
  :after (company flycheck)
  :preface
  (defun fcuny/go-mode-setup ()
    (add-hook 'go-mode-hook 'flycheck-mode)
    (setq-default)
    (setq tab-width 2))
  :config
  (add-hook 'go-mode-hook #'fcuny/go-mode-setup))

(use-package go-eldoc
  :after go-mode
  :ensure t
  :hook (go-mode . go-eldoc-setup))

(use-package gotest
  :ensure t)

(use-package go-guru
  :ensure t)

(use-package go-imports
  :ensure t)

(use-package golint
  :ensure t)

(use-package go-projectile
  :ensure t)

(use-package company-go
  :ensure t
  :after (company go-mode)
  :custom
  (company-go-show-annotation t)
  :config
  (add-hook 'go-mode-hook 'company-mode)
  (add-to-list 'company-backends 'company-go))

(use-package python
  :mode (("\\.py$" . python-mode))
  :ensure t
  :commands python-mode
  :custom (python-indent-offset 2))

(use-package anaconda-mode
  :ensure t
  :after python
  :hook ((python-mode . anaconda-mode)
         (python-mode . eldoc-mode))
  :custom (anaconda-mode-eldoc-as-single-line t))

(use-package company-anaconda
  :ensure t
  :after anaconda-mode
  :init
  (add-to-list 'company-backends 'company-anaconda))

(use-package scala-mode :ensure t)

(use-package sh-script
  :mode ("bashrc" . sh-mode)
  :config
  (defun set-sh-mode-indent ()
    (setq sh-basic-offset 2
          sh-indentation 2))
  (add-hook 'sh-mode-hook 'set-sh-mode-indent)
  (add-hook 'after-save-hook 'executable-make-buffer-file-executable-if-script-p))

(use-package dockerfile-mode
  :ensure t)

(use-package puppet-mode
  :ensure t
  :mode ("\\.pp\\'" . puppet-mode)
  ;:hook (flycheck-mode)
  :config
  (if (fc/check-work-machine-p)
    (setq flycheck-puppet-lint-rc fcuny-path-puppet-linter-svn)))


(use-package yaml-mode
  :ensure t
  :after (flycheck flyspell)
  :mode (("\\.yml?\\'" . yaml-mode)
         ("\\.yaml?\\'" . yaml-mode))
  :hook ((yaml-mode . flycheck-mode)
         (yaml-mode . flyspell-prog-mode)))

(use-package json-mode
  :ensure t
  :after (flycheck flyspell)
  :custom
  (json-reformat:indent-width 2)
  (js-indent-level 2)
  :hook ((json-mode . flyspell-prog-mode)
         (json-mode . flycheck-mode))
  :init
  (if (fc/check-work-machine-p)
    (add-to-list 'auto-mode-alist '("\\.workflow$" . json-mode))))

(use-package thrift
  :ensure t
  :after (flycheck flyspell)
  :custom
  (thrift-indent-level 2)
  :hook ((thrift . flyspell-prog-mode)
         (thrift . flycheck-mode)))

(use-package protobuf-mode
  :ensure t
  :after (flycheck flyspell)
  :hook ((protobuf-mode . flyspell-prog-mode)
         (protobuf-mode . flycheck-mode)))