;;; erc-scenarios-log.el --- erc-log scenarios -*- lexical-binding: t -*-

;; Copyright (C) 2023 Free Software Foundation, Inc.

;; This file is part of GNU Emacs.

;; GNU Emacs 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.

;; GNU Emacs 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 GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;;; Code:

(require 'ert-x)
(eval-and-compile
  (let ((load-path (cons (ert-resource-directory) load-path)))
    (require 'erc-scenarios-common)))

(require 'erc-log)
(require 'erc-truncate)

(defvar erc-timestamp-format-left)

(ert-deftest erc-scenarios-log--kill-hook ()
  :tags '(:expensive-test)
  (erc-scenarios-common-with-cleanup
      ((erc-scenarios-common-dialog "base/assoc/bouncer-history")
       (dumb-server (erc-d-run "localhost" t 'foonet))
       (tempdir (make-temp-file "erc-tests-log." t nil nil))
       (erc-log-channels-directory tempdir)
       (erc-modules (cons 'log erc-modules))
       (port (process-contact dumb-server :service))
       (logfile (expand-file-name (format "#chan!tester@127.0.0.1:%d.txt" port)
                                  tempdir))
       (erc-server-flood-penalty 0.1)
       (expect (erc-d-t-make-expecter)))

    (ert-info ("Connect to foonet")
      (with-current-buffer (erc :server "127.0.0.1"
                                :port port
                                :nick "tester"
                                :password "foonet:changeme"
                                :full-name "tester")
        (should (string= (buffer-name) (format "127.0.0.1:%d" port)))
        (funcall expect 5 "foonet")))

    (with-current-buffer (erc-d-t-wait-for 5 (get-buffer "#chan"))
      (funcall expect 10 "was created on")
      (funcall expect 10 "please your lordship")
      (with-current-buffer "foonet"
        (delete-process erc-server-process)
        (funcall expect 5 "failed"))
      (should-not (file-exists-p logfile))
      (kill-buffer)
      (should (file-exists-p logfile)))

    (with-temp-buffer
      (insert-file-contents logfile)
      (funcall expect 1 "You have joined")
      (funcall expect 1 "Playback Complete.")
      (funcall expect 1 "please your lordship"))

    (erc-log-mode -1)
    (if noninteractive
        (delete-directory tempdir :recursive)
      (add-hook 'kill-emacs-hook
                (lambda () (delete-directory tempdir :recursive))))))

;; This shows that, in addition to truncating the buffer, /clear also
;; syncs the log.

(ert-deftest erc-scenarios-log--clear-stamp ()
  :tags '(:expensive-test)
  (require 'erc-stamp)
  (erc-scenarios-common-with-cleanup
      ((erc-scenarios-common-dialog "base/assoc/bouncer-history")
       (dumb-server (erc-d-run "localhost" t 'foonet))
       (tempdir (make-temp-file "erc-tests-log." t nil nil))
       (erc-log-channels-directory tempdir)
       (erc-modules (cons 'log erc-modules))
       (erc-timestamp-format-left "\n[%a %b %e %Y @@STAMP@@]\n")
       (port (process-contact dumb-server :service))
       (logfile (expand-file-name (format "#chan!tester@127.0.0.1:%d.txt" port)
                                  tempdir))
       (erc-server-flood-penalty 0.1)
       (expect (erc-d-t-make-expecter)))

    (unless noninteractive
      (add-hook 'kill-emacs-hook
                (lambda () (delete-directory tempdir :recursive))))

    (ert-info ("Connect to foonet")
      (with-current-buffer (erc :server "127.0.0.1"
                                :port port
                                :nick "tester"
                                :password "foonet:changeme"
                                :full-name "tester")
        (should (string= (buffer-name) (format "127.0.0.1:%d" port)))
        (funcall expect 5 "foonet")))

    (with-current-buffer (erc-d-t-wait-for 5 (get-buffer "#chan"))
      (funcall expect 10 "@@STAMP@@")
      (funcall expect 10 "Grows, lives")
      (should-not (file-exists-p logfile))
      (goto-char (point-max))
      (erc-cmd-CLEAR)
      (should (file-exists-p logfile))
      (funcall expect 10 "please your lordship")
      (ert-info ("Buffer truncated")
        (goto-char (point-min))
        (funcall expect 10 "@@STAMP@@" (point)) ; reset
        (funcall expect -0.1 "Grows, lives")
        (funcall expect 1 "For these two")))

    (ert-info ("Current contents saved")
      (with-temp-buffer
        (insert-file-contents logfile)
        (funcall expect 1 "@@STAMP@@")
        (funcall expect 1 "You have joined")
        (funcall expect 1 "Playback Complete.")
        (funcall expect 1 "Grows, lives")
        (funcall expect -0.01 "please your lordship")))

    (ert-info ("Remainder saved, timestamp printed when option non-nil")
      (with-current-buffer "foonet"
        (delete-process erc-server-process)
        (funcall expect 5 "failed"))
      (kill-buffer "#chan")
      (with-temp-buffer
        (insert-file-contents logfile)
        (funcall expect 1 "@@STAMP@@")
        (funcall expect 1 "Grows, lives")
        (funcall expect -0.01 "@@STAMP@@")
        (forward-line 1) ; no blank, no timestamp
        (should (looking-at (rx "<bob> alice: For these two hours,")))
        (funcall expect 1 "please your lordship")))

    (erc-log-mode -1)
    (when noninteractive (delete-directory tempdir :recursive))))

(ert-deftest erc-scenarios-log--truncate ()
  :tags '(:expensive-test :unstable)
  (erc-scenarios-common-with-cleanup
      ((erc-scenarios-common-dialog "base/assoc/bouncer-history")
       (dumb-server (erc-d-run "localhost" t 'foonet))
       (tempdir (make-temp-file "erc-tests-log." t nil nil))
       (erc-log-channels-directory tempdir)
       (erc-modules (cons 'truncate (cons 'log erc-modules)))
       (erc-max-buffer-size 512)
       (port (process-contact dumb-server :service))
       (logchan (expand-file-name (format "#chan!tester@127.0.0.1:%d.txt" port)
                                  tempdir))
       (logserv (expand-file-name
                 (format "127.0.0.1:%d!tester@127.0.0.1:%d.txt" port port)
                 tempdir))
       (erc-server-flood-penalty 0.1)
       (expect (erc-d-t-make-expecter)))

    (unless noninteractive
      (add-hook 'kill-emacs-hook
                (lambda () (delete-directory tempdir :recursive))))

    (ert-info ("Connect to foonet")
      (with-current-buffer (erc :server "127.0.0.1"
                                :port port
                                :nick "tester"
                                :password "foonet:changeme"
                                :full-name "tester")
        (should (string= (buffer-name) (format "127.0.0.1:%d" port)))
        (should-not (file-exists-p logserv))
        (should-not (file-exists-p logchan))
        (funcall expect 10 "*** MAXLIST=beI:60")
        (should (= (pos-bol) (point-min)))
        (should (file-exists-p logserv))))

    (ert-info ("Log file ahead of truncation point")
      ;; Log contains lines still present in buffer.
      (with-temp-buffer
        (insert-file-contents logserv)
        (funcall expect 10 "*** MAXLIST=beI:60")))

    (with-current-buffer (erc-d-t-wait-for 5 (get-buffer "#chan"))
      (funcall expect 10 "please your lordship")
      (should (file-exists-p logchan))
      (funcall expect -0.1 "[07:04:37] alice: Here," (point-min)))

    (ert-info ("Log ahead of truncation point")
      (with-temp-buffer
        (insert-file-contents logchan)
        (funcall expect 1 "You have joined")
        (funcall expect 1 "[07:04:37] alice: Here,")
        (funcall expect 1 "loathed enemy")
        (funcall expect -0.1 "please your lordship")))

    (erc-log-mode -1)
    (erc-truncate-mode -1)
    (when noninteractive (delete-directory tempdir :recursive))))

;;; erc-scenarios-log.el ends here