;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 Arun Isaac <address@hidden>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix 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 Guix 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 Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu services games)
  #:use-module (gnu services)
  #:use-module (gnu services shepherd)
  #:use-module (gnu packages admin)
  #:use-module (gnu packages linux) ;; for strace - remove this
  #:use-module (gnu packages games)
  #:use-module (gnu system shadow)
  #:use-module (guix gexp)
  #:use-module (guix modules)
  #:use-module (guix records)
  #:use-module (ice-9 match)
  #:export (wesnothd-configuration
            wesnothd-configuration?
            wesnothd-service-type
            minetest-configuration
            minetest-configuration?
            minetest-service-type))

;;;
;;; The Battle for Wesnoth server
;;;

(define-record-type* <wesnothd-configuration>
  wesnothd-configuration make-wesnothd-configuration wesnothd-configuration?
  (package wesnothd-configuration-package
           (default wesnoth-server))
  (port wesnothd-configuration-port
        (default 15000)))

(define %wesnothd-accounts
  (list
   (user-account
    (name "wesnothd")
    (group "wesnothd")
    (system? #t)
    (comment "Wesnoth daemon user")
    (home-directory "/var/empty")
    (shell
     (file-append shadow "/sbin/nologin")))
   (user-group
    (name "wesnothd")
    (system? #t))))

(define wesnothd-shepherd-service
  (match-lambda
    (($ <wesnothd-configuration> package port)
     (with-imported-modules
         (source-module-closure
          '((gnu build shepherd)))
       (shepherd-service
        (documentation "The Battle for Wesnoth server")
        (provision
         '(wesnoth-daemon))
        (requirement
         '(networking))
        (modules
         '((gnu build shepherd)))
        (start #~(make-forkexec-constructor/container
                  (list #$(file-append package "/bin/wesnothd")
                        "-p" #$(number->string port))
                  #:user "wesnothd" #:group "wesnothd"))
        (stop #~(make-kill-destructor)))))))

(define wesnothd-service-type
  (service-type
   (name 'wesnothd)
   (description
    "Run The Battle for Wesnoth server @command{wesnothd}.")
   (extensions
    (list
     (service-extension account-service-type
                        (const %wesnothd-accounts))
     (service-extension shepherd-root-service-type
                        (compose list wesnothd-shepherd-service))))
   (default-value
     (wesnothd-configuration))))

(define-record-type* <minetest-configuration>
  minetest-configuration make-minetest-configuration minetest-configuration?
  (package minetest-configuration-package
           (default minetest))
  (config-file minetest-config-file
               (default "/etc/minetest.conf"))
  (map-dir minetest-map-dir
           (default "/tmp")))

(define %minetest-accounts
  (list
   (user-account
    (name "minetest")
    (group "minetest")
    (system? #t)
    (comment "Minetest daemon user")
    (home-directory "/var/minetest")
    (shell
     (file-append shadow "/sbin/nologin")))
   (user-group
    (name "minetest")
    (system? #t))))

(define minetest-shepherd-service
  (match-lambda
    (($ <minetest-configuration> package port map-dir)
     (shepherd-service
      (documentation "Minetest server.")
      (requirement '(networking))
      (provision '(minetest))
      (start #~(make-forkexec-constructor
                ;;(list #$(file-append package "/bin/minetest")
                ;;      "--server" "testworld"
                ;;      "--map-dir" #$map-dir)
                (list #$(file-append strace "/bin/strace") "-s1024" "-vfe" "trace=execve" #$(file-append package "/bin/minetest")
                      "--server" "testworld"
                      "--map-dir" #$map-dir)
                #:user "minetest"
                #:group "minetest"))
                ;;#:environment-variables
                ;;'("HOME=/var/minetest")))
      (stop #~(make-kill-destructor))))))

(define minetest-service-type
  (service-type
   (name 'minetest)
   (description
    "Run the Minetest server @command{minetest}.")
   (extensions
    (list (service-extension account-service-type
                             (const %minetest-accounts))
          (service-extension profile-service-type
                             (lambda (config)
                               (list (minetest-configuration-package
                                      config))))
          (service-extension shepherd-root-service-type
                             (compose list minetest-shepherd-service))))
   (default-value (minetest-configuration))))