;;; test-org-roam.el --- Tests for org-roam -*- lexical-binding: t; -*-

;; Copyright (C) 2020 Jethro Kuan

;; Author: Jethro Kuan <jethrokuan95@gmail.com>
;; Package-Requires: ((buttercup) (with-simulated-input))

;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with this program.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;;

;;; Code:

;;;; Requirements

(require 'buttercup)
(require 'with-simulated-input)
(require 'org-roam)
(require 'dash)

(defun abs-path (file-path)
  (file-truename (expand-file-name file-path org-roam-directory)))

(defun org-roam--test-find-new-file (path)
  (let ((path (abs-path path)))
    (make-directory (file-name-directory path) t)
    (find-file path)))

(defvar org-roam--tests-directory (file-truename (concat default-directory "tests/roam-files"))
  "Directory containing org-roam test org files.")

(defun org-roam--test-init ()
  (org-roam--db-close)
  (let ((original-dir org-roam--tests-directory)
        (new-dir (expand-file-name (make-temp-name "org-roam") temporary-file-directory)))
    (copy-directory original-dir new-dir)
    (setq org-roam-directory new-dir)
    (org-roam-mode +1)))

;;; Tests
(describe "org-roam-build-cache"
          (it "initializes correctly"
              (org-roam--test-init)
              (org-roam-build-cache)

              ;; Cache
              (expect (caar (org-roam-sql [:select (funcall count) :from files])) :to-be 8)
              (expect (caar (org-roam-sql [:select (funcall count) :from file-links])) :to-be 5)
              (expect (caar (org-roam-sql [:select (funcall count) :from titles])) :to-be 8)
              (expect (caar (org-roam-sql [:select (funcall count) :from titles
                                                   :where titles :is-null])) :to-be 2)
              (expect (caar (org-roam-sql [:select (funcall count) :from refs])) :to-be 1)

              ;; TODO Test files

              ;; Links -- File-from
              (expect (caar (org-roam-sql [:select (funcall count) :from file-links
                                                   :where (= file-from $s1)]
                                          (abs-path "foo.org"))) :to-be 1)
              (expect (caar (org-roam-sql [:select (funcall count) :from file-links
                                                   :where (= file-from $s1)]
                                          (abs-path "nested/bar.org"))) :to-be 2)

              ;; Links -- File-to
              (expect (caar (org-roam-sql [:select (funcall count) :from file-links
                                                   :where (= file-to $s1)]
                                          (abs-path "nested/foo.org"))) :to-be 1)
              (expect (caar (org-roam-sql [:select (funcall count) :from file-links
                                                   :where (= file-to $s1)]
                                          (abs-path "nested/bar.org"))) :to-be 1)
              (expect (caar (org-roam-sql [:select (funcall count) :from file-links
                                                   :where (= file-to $s1)]
                                          (abs-path "unlinked.org"))) :to-be 0)
              ;; TODO Test titles
              (expect (org-roam-sql [:select * :from titles])
                      :to-have-same-items-as
                      (list (list (abs-path "alias.org")
                                  (list "t1" "a1" "a 2"))
                            (list (abs-path "bar.org")
                                  (list "Bar"))
                            (list (abs-path "foo.org")
                                  (list "Foo"))
                            (list (abs-path "nested/bar.org")
                                  (list "Nested Bar"))
                            (list (abs-path "nested/foo.org")
                                  (list "Nested Foo"))
                            (list (abs-path "no-title.org") nil)
                            (list (abs-path "web_ref.org") nil)
                            (list (abs-path "unlinked.org")
                                  (list "Unlinked"))))

              (expect (org-roam-sql [:select * :from refs])
                      :to-have-same-items-as
                      (list (list "https://google.com/" (abs-path "web_ref.org"))))

              ;; Expect rebuilds to be really quick (nothing changed)
              (expect (org-roam-build-cache)
                      :to-equal
                      (list :files 0 :links 0 :titles 0 :refs 0 :deleted 0))))

(describe "org-roam-insert"
          (before-each
           (org-roam--test-init)
           (org-roam--db-clear)
           (org-roam-build-cache))

          (it "temp1 -> foo"
              (let ((buf (org-roam--test-find-new-file "temp1.org")))
                (with-current-buffer buf
                  (with-simulated-input
                   "Foo RET"
                   (org-roam-insert nil))))
              (expect (buffer-string) :to-match (regexp-quote "file:foo.org")))

          (it "temp2 -> nested/foo"
              (let ((buf (org-roam--test-find-new-file "temp2.org")))
                (with-current-buffer buf
                  (with-simulated-input
                   "Nested SPC Foo RET"
                   (org-roam-insert nil))))
              (expect (buffer-string) :to-match (regexp-quote "file:nested/foo.org")))

          (it "nested/temp3 -> foo"
              (let ((buf (org-roam--test-find-new-file "nested/temp3.org")))
                (with-current-buffer buf
                  (with-simulated-input
                   "Foo RET"
                   (org-roam-insert nil))))
              (expect (buffer-string) :to-match (regexp-quote "file:../foo.org")))

          (it "a/b/temp4 -> nested/foo"
              (let ((buf (org-roam--test-find-new-file "a/b/temp4.org")))
                (with-current-buffer buf
                  (with-simulated-input
                   "Nested SPC Foo RET"
                   (org-roam-insert nil))))
              (expect (buffer-string) :to-match (regexp-quote "file:../../nested/foo.org"))))

(describe "rename file updates cache"
          (before-each
           (org-roam--test-init)
           (org-roam--db-clear)
           (org-roam-build-cache))

          (it "foo -> new_foo"
              (rename-file (abs-path "foo.org")
                           (abs-path "new_foo.org"))
              ;; Cache should be cleared of old file
              (expect (caar (org-roam-sql [:select (funcall count)
                                           :from titles
                                           :where (= file $s1)]
                                          (abs-path "foo.org"))) :to-be 0)
              (expect (caar (org-roam-sql [:select (funcall count)
                                           :from refs
                                           :where (= file $s1)]
                                          (abs-path "foo.org"))) :to-be 0)
              (expect (caar (org-roam-sql [:select (funcall count)
                                           :from file-links
                                           :where (= file-from $s1)]
                                          (abs-path "foo.org"))) :to-be 0)

              ;; Cache should be updated
              (expect (org-roam-sql [:select [file-to]
                                     :from file-links
                                     :where (= file-from $s1)]
                                    (abs-path "new_foo.org"))
                      :to-have-same-items-as
                      (list (list (abs-path "bar.org"))))
              (expect (org-roam-sql [:select [file-from]
                                     :from file-links
                                     :where (= file-to $s1)]
                                    (abs-path "new_foo.org"))
                      :to-have-same-items-as
                      (list (list (abs-path "nested/bar.org"))))

              ;; Links are updated
              (expect (with-temp-buffer
                        (insert-file-contents (abs-path "nested/bar.org"))
                        (buffer-string))
                      :to-match
                      (regexp-quote "[[file:../new_foo.org][Foo]]")))

          (it "foo -> foo with spaces"
              (rename-file (abs-path "foo.org")
                           (abs-path "foo with spaces.org"))
              ;; Cache should be cleared of old file
              (expect (caar (org-roam-sql [:select (funcall count)
                                           :from titles
                                           :where (= file $s1)]
                                          (abs-path "foo.org"))) :to-be 0)
              (expect (caar (org-roam-sql [:select (funcall count)
                                           :from refs
                                           :where (= file $s1)]
                                          (abs-path "foo.org"))) :to-be 0)
              (expect (caar (org-roam-sql [:select (funcall count)
                                           :from file-links
                                           :where (= file-from $s1)]
                                          (abs-path "foo.org"))) :to-be 0)

              ;; Cache should be updated
              (expect (org-roam-sql [:select [file-to]
                                     :from file-links
                                     :where (= file-from $s1)]
                                    (abs-path "foo with spaces.org"))
                      :to-have-same-items-as
                      (list (list (abs-path "bar.org"))))
              (expect (org-roam-sql [:select [file-from]
                                     :from file-links
                                     :where (= file-to $s1)]
                                    (abs-path "foo with spaces.org"))
                      :to-have-same-items-as
                      (list (list (abs-path "nested/bar.org"))))

              ;; Links are updated
              (expect (with-temp-buffer
                        (insert-file-contents (abs-path "nested/bar.org"))
                        (buffer-string))
                      :to-match
                      (regexp-quote "[[file:../foo with spaces.org][Foo]]")))

          (it "no-title -> meaningful-title"
              (rename-file (abs-path "no-title.org")
                           (abs-path "meaningful-title.org"))
              ;; File has no forward links
              (expect (caar (org-roam-sql [:select (funcall count)
                                           :from file-links
                                           :where (= file-from $s1)]
                                          (abs-path "no-title.org"))) :to-be 0)
              (expect (caar (org-roam-sql [:select (funcall count)
                                           :from file-links
                                           :where (= file-from $s1)]
                                          (abs-path "meaningful-title.org"))) :to-be 1)

              ;; Links are updated with the appropriate name
              (expect (with-temp-buffer
                        (insert-file-contents (abs-path "meaningful-title.org"))
                        (buffer-string))
                      :to-match
                      (regexp-quote "[[file:meaningful-title.org][meaningful-title]]")))

          (it "web_ref -> hello"
              (expect (org-roam-sql
                       [:select [file] :from refs
                        :where (= ref $s1)]
                       "https://google.com/")
                      :to-equal
                      (list (list (abs-path "web_ref.org"))))
              (rename-file (abs-path "web_ref.org")
                           (abs-path "hello.org"))
              (expect (org-roam-sql
                       [:select [file] :from refs
                        :where (= ref $s1)]
                       "https://google.com/")
                      :to-equal (list (list (abs-path "hello.org"))))
              (expect (caar (org-roam-sql
                             [:select [ref] :from refs
                              :where (= file $s1)]
                             (abs-path "web_ref.org")))
                      :to-equal nil)))

(describe "delete file updates cache"
          (before-each
           (org-roam--test-init)
           (org-roam--db-clear)
           (org-roam-build-cache)
           (sleep-for 1))

          (it "delete foo"
              (delete-file (abs-path "foo.org"))
              (expect (caar (org-roam-sql [:select (funcall count)
                                           :from titles
                                           :where (= file $s1)]
                                          (abs-path "foo.org"))) :to-be 0)
              (expect (caar (org-roam-sql [:select (funcall count)
                                           :from refs
                                           :where (= file $s1)]
                                          (abs-path "foo.org"))) :to-be 0)
              (expect (caar (org-roam-sql [:select (funcall count)
                                           :from file-links
                                           :where (= file-from $s1)]
                                          (abs-path "foo.org"))) :to-be 0))

          (it "delete web_ref"
              (expect (org-roam-sql [:select * :from refs])
                      :to-have-same-items-as
                      (list (list "https://google.com/" (abs-path "web_ref.org"))))
              (delete-file (abs-path "web_ref.org"))
              (expect (org-roam-sql [:select * :from refs])
                      :to-have-same-items-as
                      (list))))