;; SPDX-FileCopyrightText: 2021-2022 Nikita Domnitskii
;;
;; SPDX-License-Identifier: BSD-3-Clause

(define-module (rosenthal services networking)
  #:use-module ((guix import utils) #:select (flatten))
  #:use-module (guix gexp)
  #:use-module (guix records)
  #:use-module (gnu packages dns)
  #:use-module (gnu packages base)
  #:use-module (gnu packages networking)
  #:use-module (gnu services)
  #:use-module (gnu services dbus)
  #:use-module (gnu services shepherd)
  #:use-module (gnu services configuration)
  #:use-module (rosenthal utils home-services-utils)
  #:export (iwd-service-type
            iwd-configuration))

(define (serialize-ini-config config)
  (define (serialize-val val)
    (cond ((boolean? val) (if val "true" "false"))
          ((list? val) (string-join (map serialize-val val) ","))
          ((or (number? val) (symbol? val)) (maybe-object->string val))
          (else val)))

  (define (serialize-field key val)
    (let ((val (serialize-val val))
          (key (symbol->string key)))
      (list key " = " val "\n")))

  (generic-serialize-ini-config #:combine-ini (compose flatten interpose)
                                #:combine-alist list
                                #:combine-section-alist cons
                                #:serialize-field serialize-field
                                #:fields config))

(define-configuration iwd-configuration
  (iwd
   (file-like iwd)
   "The iwd package.")
  (config
   (ini-config '())
   "Association list of iwd configurations.")
  (no-serialization))

(define iwd-shepherd-service
  (match-record-lambda <iwd-configuration>
      (iwd config)
    (let ((environment
           #~(list (string-append
                    "PATH=" (string-join
                             (list #$(file-append openresolv "/sbin")
                                   #$(file-append coreutils "/bin"))
                             ":")))))
      (list (shepherd-service
             (documentation "Run iwd")
             (provision '(iwd networking))
             (requirement '(user-processes dbus-system loopback))
             (start #~(make-forkexec-constructor
                       (list (string-append #$iwd "/libexec/iwd"))
                       #:log-file "/var/log/iwd.log"
                       #:environment-variables #$environment))
             (stop #~(make-kill-destructor)))))))

(define iwd-etc-service
  (match-record-lambda <iwd-configuration>
      (iwd config)
    `(("iwd/main.conf"
       ,(apply mixed-text-file
               "main.conf"
               (serialize-ini-config config))))))

(define add-iwd-package (compose list iwd-configuration-iwd))

(define iwd-service-type
  (service-type
   (name 'iwd)
   (extensions
    (list (service-extension shepherd-root-service-type
                             iwd-shepherd-service)
          (service-extension dbus-root-service-type
                             add-iwd-package)
          (service-extension etc-service-type
                             iwd-etc-service)
          (service-extension profile-service-type
                             add-iwd-package)))
   (default-value (iwd-configuration))
   (description "Run iwd, the Internet Wireless Daemon.")))