;; Debian packages: elpa-org elpa-org-bullets
(require 'org-capture)
(require 'org-protocol)
(require 'org-habit)
(require 'org-bullets)

;; --------
;; Org mode
;; --------

(require 'org)

(global-set-key (kbd "<f11>") 'org-agenda)

(setq org-cycle-separator-lines 0)
(setq org-startup-indented t)
(setq org-hide-leading-stars nil)

(add-hook 'org-mode-hook 'turn-off-auto-fill)
(add-hook 'org-mode-hook 'visual-line-mode)

(setq org-startup-indented t
      org-bullets-bullet-list '(" ") ;; no bullets, needs org-bullets package
      org-pretty-entities nil
      org-hide-emphasis-markers t
      ;; show actually italicized text instead of /italicized text/
      org-agenda-block-separator ""
      org-fontify-whole-heading-line t
      org-fontify-done-headline t
      org-fontify-quote-and-verse-blocks t)


;; ORG BINDINGS ;;
(global-set-key (kbd "<f9> I") 'bh/punch-in)
(global-set-key (kbd "<f9> O") 'bh/punch-out)

;; ORG STATES ;;
(setq org-todo-keywords
      (quote ((sequence "TODO(t)" "NEXT(n)" "|" "DONE(d)")
              (sequence "WAITING(w@/!)" "HOLD(h@/!)" "|" "CANCELLED(c@/!)" "PHONE" "MEETING"))))

(setq org-use-fast-todo-selection t)

(setq org-todo-state-tags-triggers
      (quote (("CANCELLED" ("CANCELLED" . t))
              ("WAITING" ("WAITING" . t))
              ("HOLD" ("WAITING") ("HOLD" . t))
              (done ("WAITING") ("HOLD"))
              ("TODO" ("WAITING") ("CANCELLED") ("HOLD"))
              ("NEXT" ("WAITING") ("CANCELLED") ("HOLD"))
              ("DONE" ("WAITING") ("CANCELLED") ("HOLD")))))

(setq org-enforce-todo-dependencies t)
(setq org-log-done (quote time))
(setq org-log-redeadline (quote time))
(setq org-log-reschedule (quote time))

;; CAPTURE ;;
(setq org-default-notes-file my-org-refile-path)

;; I use C-c c to start capture mode
(global-set-key (kbd "C-c c") 'org-capture)

(setq org-capture-templates
      (quote
       (
        ("w" "Todo" entry (file+headline my-org-refile-path "Tasks")
         "* TODO "
         :empty-lines 1)
        ("m" "Mail" entry (file+headline my-org-refile-path "Incoming")
         "* TODO %^{Title}\n\n  Source: %u, %c\n\n  %i"
         :empty-lines 1)
        )))

(add-hook 'org-capture-mode-hook 'delete-other-windows)
(setq my-org-protocol-flag nil)

(defadvice org-capture-finalize (after delete-frame-at-end activate)
  "Delete frame at remember finalization"
  (progn (if my-org-protocol-flag (delete-frame))
         (setq my-org-protocol-flag nil)))

(defadvice org-capture-kill (after delete-frame-at-end activate)
  "Delete frame at remember abort"
  (progn (if my-org-protocol-flag (delete-frame))
         (setq my-org-protocol-flag nil)))

(defadvice org-protocol-capture (before set-org-protocol-flag activate)
  (setq my-org-protocol-flag t))


;; REFILE ;;

; Targets include this file and any file contributing to the agenda - up to 9 levels deep
(setq org-refile-targets (quote ((nil :maxlevel . 9)
                                 (my-org-agenda-files :maxlevel . 9))))

; Exclude DONE state tasks from refile targets
(defun bh/verify-refile-target ()
  "Exclude todo keywords with a done state from refile targets"
  (not (member (nth 2 (org-heading-components)) org-done-keywords)))

(setq org-refile-target-verify-function 'bh/verify-refile-target)

; Targets complete directly with IDO
(setq org-outline-path-complete-in-steps nil)

; Allow refile to create parent tasks with confirmation
(setq org-refile-allow-creating-parent-nodes (quote confirm))

;; AGENDA VIEW ;;
(setq org-agenda-files my-org-agenda-files)

;; Do not dim blocked tasks
(setq org-agenda-dim-blocked-tasks nil)

;; Compact the block agenda view
(setq org-agenda-compact-blocks t)

;; Custom agenda command definitions
(setq org-agenda-custom-commands
      (quote (("N" "Notes" tags "NOTE"
               ((org-agenda-overriding-header "Notes")
                (org-tags-match-list-sublevels t)))
              ("h" "Habits" tags-todo "STYLE=\"habit\""
               ((org-agenda-overriding-header "Habits")
                (org-agenda-sorting-strategy
                 '(todo-state-down effort-up category-keep))))
              (" " "Agenda"
               ((agenda "" nil)
                (tags "REFILE"
                      ((org-agenda-overriding-header "Tasks to Refile")
                       (org-tags-match-list-sublevels nil)))
                (tags-todo "-CANCELLED/!"
                           ((org-agenda-overriding-header "Stuck Projects")
                            (org-agenda-skip-function 'bh/skip-non-stuck-projects)
                            (org-agenda-sorting-strategy
                             '(category-keep))))
                (tags-todo "-HOLD-CANCELLED/!"
                           ((org-agenda-overriding-header "Projects")
                            (org-agenda-skip-function 'bh/skip-non-projects)
                            (org-tags-match-list-sublevels 'indented)
                            (org-agenda-sorting-strategy
                             '(category-keep))))
                (tags-todo "-CANCELLED/!NEXT"
                           ((org-agenda-overriding-header (concat "Project Next Tasks"
                                                                  (if bh/hide-scheduled-and-waiting-next-tasks
                                                                      ""
                                                                    " (including WAITING and SCHEDULED tasks)")))
                            (org-agenda-skip-function 'bh/skip-projects-and-habits-and-single-tasks)
                            (org-tags-match-list-sublevels t)
                            (org-agenda-todo-ignore-scheduled bh/hide-scheduled-and-waiting-next-tasks)
                            (org-agenda-todo-ignore-deadlines bh/hide-scheduled-and-waiting-next-tasks)
                            (org-agenda-todo-ignore-with-date bh/hide-scheduled-and-waiting-next-tasks)
                            (org-agenda-sorting-strategy
                             '(todo-state-down effort-up category-keep))))
                (tags-todo "-REFILE-CANCELLED-WAITING-HOLD/!"
                           ((org-agenda-overriding-header (concat "Project Subtasks"
                                                                  (if bh/hide-scheduled-and-waiting-next-tasks
                                                                      ""
                                                                    " (including WAITING and SCHEDULED tasks)")))
                            (org-agenda-skip-function 'bh/skip-non-project-tasks)
                            (org-agenda-todo-ignore-scheduled bh/hide-scheduled-and-waiting-next-tasks)
                            (org-agenda-todo-ignore-deadlines bh/hide-scheduled-and-waiting-next-tasks)
                            (org-agenda-todo-ignore-with-date bh/hide-scheduled-and-waiting-next-tasks)
                            (org-agenda-sorting-strategy
                             '(category-keep))))
                (tags-todo "-REFILE-CANCELLED-WAITING-HOLD/!"
                           ((org-agenda-overriding-header (concat "Standalone Tasks"
                                                                  (if bh/hide-scheduled-and-waiting-next-tasks
                                                                      ""
                                                                    " (including WAITING and SCHEDULED tasks)")))
                            (org-agenda-skip-function 'bh/skip-project-tasks)
                            (org-agenda-todo-ignore-scheduled bh/hide-scheduled-and-waiting-next-tasks)
                            (org-agenda-todo-ignore-deadlines bh/hide-scheduled-and-waiting-next-tasks)
                            (org-agenda-todo-ignore-with-date bh/hide-scheduled-and-waiting-next-tasks)
                            (org-agenda-sorting-strategy
                             '(category-keep))))
                (tags-todo "-CANCELLED+WAITING|HOLD/!"
                           ((org-agenda-overriding-header (concat "Waiting and Postponed Tasks"
                                                                  (if bh/hide-scheduled-and-waiting-next-tasks
                                                                      ""
                                                                    " (including WAITING and SCHEDULED tasks)")))
                            (org-agenda-skip-function 'bh/skip-non-tasks)
                            (org-tags-match-list-sublevels nil)
                            (org-agenda-todo-ignore-scheduled bh/hide-scheduled-and-waiting-next-tasks)
                            (org-agenda-todo-ignore-deadlines bh/hide-scheduled-and-waiting-next-tasks)))
                (tags "-REFILE/"
                      ((org-agenda-overriding-header "Tasks to Archive")
                       (org-agenda-skip-function 'bh/skip-non-archivable-tasks)
                       (org-tags-match-list-sublevels nil))))
               nil))))

(defun bh/skip-non-archivable-tasks ()
  "Skip trees that are not available for archiving"
  (save-restriction
    (widen)
    ;; Consider only tasks with done todo headings as archivable candidates
    (let ((next-headline (save-excursion (or (outline-next-heading) (point-max))))
          (subtree-end (save-excursion (org-end-of-subtree t))))
      (if (member (org-get-todo-state) org-todo-keywords-1)
          (if (member (org-get-todo-state) org-done-keywords)
              nil
            (or subtree-end (point-max)))
        next-headline))))

(defun bh/org-auto-exclude-function (tag)
  "Automatic task exclusion in the agenda with / RET"
  (and (cond
        ((string= tag "hold")
         t))
       (concat "-" tag)))

(setq org-agenda-auto-exclude-function 'bh/org-auto-exclude-function)
(setq org-agenda-span 'day)
(setq org-deadline-warning-days 30)


(defun bh/is-project-p ()
  "Any task with a todo keyword subtask"
  (save-restriction
    (widen)
    (let ((has-subtask)
          (subtree-end (save-excursion (org-end-of-subtree t)))
          (is-a-task (member (nth 2 (org-heading-components)) org-todo-keywords-1)))
      (save-excursion
        (forward-line 1)
        (while (and (not has-subtask)
                    (< (point) subtree-end)
                    (re-search-forward "^\*+ " subtree-end t))
          (when (member (org-get-todo-state) org-todo-keywords-1)
            (setq has-subtask t))))
      (and is-a-task has-subtask))))

(defun bh/is-project-subtree-p ()
  "Any task with a todo keyword that is in a project subtree.
Callers of this function already widen the buffer view."
  (let ((task (save-excursion (org-back-to-heading 'invisible-ok)
                              (point))))
    (save-excursion
      (bh/find-project-task)
      (if (equal (point) task)
          nil
        t))))

(defun bh/is-task-p ()
  "Any task with a todo keyword and no subtask"
  (save-restriction
    (widen)
    (let ((has-subtask)
          (subtree-end (save-excursion (org-end-of-subtree t)))
          (is-a-task (member (nth 2 (org-heading-components)) org-todo-keywords-1)))
      (save-excursion
        (forward-line 1)
        (while (and (not has-subtask)
                    (< (point) subtree-end)
                    (re-search-forward "^\*+ " subtree-end t))
          (when (member (org-get-todo-state) org-todo-keywords-1)
            (setq has-subtask t))))
      (and is-a-task (not has-subtask)))))

(defun bh/is-subproject-p ()
  "Any task which is a subtask of another project"
  (let ((is-subproject)
        (is-a-task (member (nth 2 (org-heading-components)) org-todo-keywords-1)))
    (save-excursion
      (while (and (not is-subproject) (org-up-heading-safe))
        (when (member (nth 2 (org-heading-components)) org-todo-keywords-1)
          (setq is-subproject t))))
    (and is-a-task is-subproject)))

(defun bh/list-sublevels-for-projects-indented ()
  "Set org-tags-match-list-sublevels so when restricted to a subtree we list all subtasks.
  This is normally used by skipping functions where this variable is already local to the agenda."
  (if (marker-buffer org-agenda-restrict-begin)
      (setq org-tags-match-list-sublevels 'indented)
    (setq org-tags-match-list-sublevels nil))
  nil)

(defun bh/list-sublevels-for-projects ()
  "Set org-tags-match-list-sublevels so when restricted to a subtree we list all subtasks.
  This is normally used by skipping functions where this variable is already local to the agenda."
  (if (marker-buffer org-agenda-restrict-begin)
      (setq org-tags-match-list-sublevels t)
    (setq org-tags-match-list-sublevels nil))
  nil)

(defvar bh/hide-scheduled-and-waiting-next-tasks t)

(defun bh/toggle-next-task-display ()
  (interactive)
  (setq bh/hide-scheduled-and-waiting-next-tasks (not bh/hide-scheduled-and-waiting-next-tasks))
  (when  (equal major-mode 'org-agenda-mode)
    (org-agenda-redo))
  (message "%s WAITING and SCHEDULED NEXT Tasks" (if bh/hide-scheduled-and-waiting-next-tasks "Hide" "Show")))

(defun bh/skip-stuck-projects ()
  "Skip trees that are not stuck projects"
  (save-restriction
    (widen)
    (let ((next-headline (save-excursion (or (outline-next-heading) (point-max)))))
      (if (bh/is-project-p)
          (let* ((subtree-end (save-excursion (org-end-of-subtree t)))
                 (has-next ))
            (save-excursion
              (forward-line 1)
              (while (and (not has-next) (< (point) subtree-end) (re-search-forward "^\\*+ NEXT " subtree-end t))
                (unless (member "WAITING" (org-get-tags-at))
                  (setq has-next t))))
            (if has-next
                nil
              next-headline)) ; a stuck project, has subtasks but no next task
        nil))))

(defun bh/skip-non-stuck-projects ()
  "Skip trees that are not stuck projects"
  ;; (bh/list-sublevels-for-projects-indented)
  (save-restriction
    (widen)
    (let ((next-headline (save-excursion (or (outline-next-heading) (point-max)))))
      (if (bh/is-project-p)
          (let* ((subtree-end (save-excursion (org-end-of-subtree t)))
                 (has-next ))
            (save-excursion
              (forward-line 1)
              (while (and (not has-next) (< (point) subtree-end) (re-search-forward "^\\*+ NEXT " subtree-end t))
                (unless (member "WAITING" (org-get-tags-at))
                  (setq has-next t))))
            (if has-next
                next-headline
              nil)) ; a stuck project, has subtasks but no next task
        next-headline))))

(defun bh/skip-non-projects ()
  "Skip trees that are not projects"
  ;; (bh/list-sublevels-for-projects-indented)
  (if (save-excursion (bh/skip-non-stuck-projects))
      (save-restriction
        (widen)
        (let ((subtree-end (save-excursion (org-end-of-subtree t))))
          (cond
           ((bh/is-project-p)
            nil)
           ((and (bh/is-project-subtree-p) (not (bh/is-task-p)))
            nil)
           (t
            subtree-end))))
    (save-excursion (org-end-of-subtree t))))

(defun bh/skip-non-tasks ()
  "Show non-project tasks.
Skip project and sub-project tasks, habits, and project related tasks."
  (save-restriction
    (widen)
    (let ((next-headline (save-excursion (or (outline-next-heading) (point-max)))))
      (cond
       ((bh/is-task-p)
        nil)
       (t
        next-headline)))))

(defun bh/skip-project-trees-and-habits ()
  "Skip trees that are projects"
  (save-restriction
    (widen)
    (let ((subtree-end (save-excursion (org-end-of-subtree t))))
      (cond
       ((bh/is-project-p)
        subtree-end)
       ((org-is-habit-p)
        subtree-end)
       (t
        nil)))))

(defun bh/skip-projects-and-habits-and-single-tasks ()
  "Skip trees that are projects, tasks that are habits, single non-project tasks"
  (save-restriction
    (widen)
    (let ((next-headline (save-excursion (or (outline-next-heading) (point-max)))))
      (cond
       ((org-is-habit-p)
        next-headline)
       ((and bh/hide-scheduled-and-waiting-next-tasks
             (member "WAITING" (org-get-tags-at)))
        next-headline)
       ((bh/is-project-p)
        next-headline)
       ((and (bh/is-task-p) (not (bh/is-project-subtree-p)))
        next-headline)
       (t
        nil)))))

(defun bh/skip-project-tasks-maybe ()
  "Show tasks related to the current restriction.
When restricted to a project, skip project and sub project tasks, habits, NEXT tasks, and loose tasks.
When not restricted, skip project and sub-project tasks, habits, and project related tasks."
  (save-restriction
    (widen)
    (let* ((subtree-end (save-excursion (org-end-of-subtree t)))
           (next-headline (save-excursion (or (outline-next-heading) (point-max))))
           (limit-to-project (marker-buffer org-agenda-restrict-begin)))
      (cond
       ((bh/is-project-p)
        next-headline)
       ((org-is-habit-p)
        subtree-end)
       ((and (not limit-to-project)
             (bh/is-project-subtree-p))
        subtree-end)
       ((and limit-to-project
             (bh/is-project-subtree-p)
             (member (org-get-todo-state) (list "NEXT")))
        subtree-end)
       (t
        nil)))))

(defun bh/skip-project-tasks ()
  "Show non-project tasks.
Skip project and sub-project tasks, habits, and project related tasks."
  (save-restriction
    (widen)
    (let* ((subtree-end (save-excursion (org-end-of-subtree t))))
      (cond
       ((bh/is-project-p)
        subtree-end)
       ((org-is-habit-p)
        subtree-end)
       ((bh/is-project-subtree-p)
        subtree-end)
       (t
        nil)))))

(defun bh/skip-non-project-tasks ()
  "Show project tasks.
Skip project and sub-project tasks, habits, and loose non-project tasks."
  (save-restriction
    (widen)
    (let* ((subtree-end (save-excursion (org-end-of-subtree t)))
           (next-headline (save-excursion (or (outline-next-heading) (point-max)))))
      (cond
       ((bh/is-project-p)
        next-headline)
       ((org-is-habit-p)
        subtree-end)
       ((and (bh/is-project-subtree-p)
             (member (org-get-todo-state) (list "NEXT")))
        subtree-end)
       ((not (bh/is-project-subtree-p))
        subtree-end)
       (t
        nil)))))

(defun bh/skip-projects-and-habits ()
  "Skip trees that are projects and tasks that are habits"
  (save-restriction
    (widen)
    (let ((subtree-end (save-excursion (org-end-of-subtree t))))
      (cond
       ((bh/is-project-p)
        subtree-end)
       ((org-is-habit-p)
        subtree-end)
       (t
        nil)))))

(defun bh/skip-non-subprojects ()
  "Skip trees that are not projects"
  (let ((next-headline (save-excursion (outline-next-heading))))
    (if (bh/is-subproject-p)
        nil
      next-headline)))

;; CLOCKING ;;
;; Resume clocking task when emacs is restarted
(org-clock-persistence-insinuate)
;;
;; Show lot of clocking history so it's easy to pick items off the C-F11 list
(setq org-clock-history-length 23)
;; Resume clocking task on clock-in if the clock is open
(setq org-clock-in-resume t)
;; Change tasks to NEXT when clocking in
(setq org-clock-in-switch-to-state 'bh/clock-in-to-next)
;; Separate drawers for clocking and logs
(setq org-drawers (quote ("PROPERTIES" "LOGBOOK")))
;; Save clock data and state changes and notes in the LOGBOOK drawer
(setq org-clock-into-drawer t)
;; Sometimes I change tasks I'm clocking quickly - this removes clocked tasks with 0:00 duration
(setq org-clock-out-remove-zero-time-clocks t)
;; Clock out when moving task to a done state
(setq org-clock-out-when-done t)
;; Save the running clock and all clock history when exiting Emacs, load it on startup
(setq org-clock-persist t)
;; Do not prompt to resume an active clock
(setq org-clock-persist-query-resume nil)
;; Enable auto clock resolution for finding open clocks
(setq org-clock-auto-clock-resolution (quote when-no-clock-is-running))
;; Include current clocking task in clock reports
(setq org-clock-report-include-clocking-task t)


(setq bh/keep-clock-running nil)

(defun bh/clock-in-to-next (kw)
  "Switch a task from TODO to NEXT when clocking in.
Skips capture tasks, projects, and subprojects.
Switch projects and subprojects from NEXT back to TODO"
  (when (not (and (boundp 'org-capture-mode) org-capture-mode))
    (cond
     ((and (member (org-get-todo-state) (list "TODO"))
           (bh/is-task-p))
      "NEXT")
     ((and (member (org-get-todo-state) (list "NEXT"))
           (bh/is-project-p))
      "TODO"))))

(defun bh/find-project-task ()
  "Move point to the parent (project) task if any"
  (save-restriction
    (widen)
    (let ((parent-task (save-excursion (org-back-to-heading 'invisible-ok) (point))))
      (while (org-up-heading-safe)
        (when (member (nth 2 (org-heading-components)) org-todo-keywords-1)
          (setq parent-task (point))))
      (goto-char parent-task)
      parent-task)))

(defun bh/punch-in (arg)
  "Start continuous clocking and set the default task to the
selected task.  If no task is selected set the Organization task
as the default task."
  (interactive "p")
  (setq bh/keep-clock-running t)
  (if (equal major-mode 'org-agenda-mode)
      ;;
      ;; We're in the agenda
      ;;
      (let* ((marker (org-get-at-bol 'org-hd-marker))
             (tags (org-with-point-at marker (org-get-tags-at))))
        (if (and (eq arg 4) tags)
            (org-agenda-clock-in '(16))
          (bh/clock-in-organization-task-as-default)))
    ;;
    ;; We are not in the agenda
    ;;
    (save-restriction
      (widen)
      ; Find the tags on the current task
      (if (and (equal major-mode 'org-mode) (not (org-before-first-heading-p)) (eq arg 4))
          (org-clock-in '(16))
        (bh/clock-in-organization-task-as-default)))))

(defun bh/punch-out ()
  (interactive)
  (setq bh/keep-clock-running nil)
  (when (org-clock-is-active)
    (org-clock-out))
  (org-agenda-remove-restriction-lock))

(defun bh/clock-in-default-task ()
  (save-excursion
    (org-with-point-at org-clock-default-task
      (org-clock-in))))

(defun bh/clock-in-parent-task ()
  "Move point to the parent (project) task if any and clock in"
  (let ((parent-task))
    (save-excursion
      (save-restriction
        (widen)
        (while (and (not parent-task) (org-up-heading-safe))
          (when (member (nth 2 (org-heading-components)) org-todo-keywords-1)
            (setq parent-task (point))))
        (if parent-task
            (org-with-point-at parent-task
              (org-clock-in))
          (when bh/keep-clock-running
            (bh/clock-in-default-task)))))))

(defvar bh/organization-task-id "eb155a82-92b2-4f25-a3c6-0304591af2f9")

(defun bh/clock-in-organization-task-as-default ()
  (interactive)
  (org-with-point-at (org-id-find bh/organization-task-id 'marker)
    (org-clock-in '(16))))

(defun bh/clock-out-maybe ()
  (when (and bh/keep-clock-running
             (not org-clock-clocking-in)
             (marker-buffer org-clock-default-task)
             (not org-clock-resolving-clocks-due-to-idleness))
    (bh/clock-in-parent-task)))

(add-hook 'org-clock-out-hook 'bh/clock-out-maybe 'append)


;; ORG REPORTS ;;
; Set default column view headings: Task Effort Clock_Summary
(setq org-columns-default-format "%80ITEM(Task) %10Effort(Effort){:} %10CLOCKSUM")

(defun my-org-clocktable-indent-string (level)
  (if (= level 1)
      ""
    (let ((str "^"))
      (while (> level 2)
        (setq level (1- level)
              str (concat str "--")))
      (concat str "-> "))))

(advice-add 'org-clocktable-indent-string :override #'my-org-clocktable-indent-string)

(setq org-clock-clocktable-default-properties '(:maxlevel 4 :scope file :formula %))

; global Effort estimate values
; global STYLE property values for completion
(setq org-global-properties (quote (("Effort_ALL" . "0:15 0:30 0:45 1:00 2:00 3:00 4:00 5:00 6:00 0:00")
                                    ("STYLE_ALL" . "habit"))))

;; Agenda log mode items to display (closed and state changes by default)
(setq org-agenda-log-mode-items (quote (closed state)))

;; TAGS ;;
; Tags with fast selection keys
(setq org-tag-alist (quote ((:startgroup)
                            ("@errand" . ?e)
                            ("@office" . ?o)
                            ("@home" . ?H)
                            (:endgroup)
                            ("WAITING" . ?w)
                            ("HOLD" . ?h)
                            ("PERSONAL" . ?P)
                            ("WORK" . ?W)
                            ("ORG" . ?O)
                            ("NOTE" . ?n)
                            ("CANCELLED" . ?c)
                            ("FLAGGED" . ??))))

; Allow setting single tags without the menu
(setq org-fast-tag-selection-single-key (quote expert))

; For tag searches ignore tasks with scheduled and deadline dates
(setq org-agenda-tags-todo-honor-ignore-options t)