;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2019 Jakob L. Kreuze <zerodaysfordays@sdf.org>
;;; Copyright © 2020 Brice Waegeneire <brice@waegenei.re>
;;; Copyright © 2022 Matthew James Kraai <kraai@ftbfs.org>
;;; Copyright © 2022 Ricardo Wurmus <rekado@elephly.net>
;;;
;;; 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 machine digital-ocean)
  #:use-module (gnu machine ssh)
  #:use-module (gnu machine)
  #:use-module (gnu services)
  #:use-module (gnu services base)
  #:use-module (gnu services networking)
  #:use-module (gnu system)
  #:use-module (gnu system pam)
  #:use-module (guix base32)
  #:use-module (guix derivations)
  #:use-module (guix i18n)
  #:use-module ((guix diagnostics) #:select (formatted-message))
  #:use-module (guix import json)
  #:use-module (guix monads)
  #:use-module (guix records)
  #:use-module (guix ssh)
  #:use-module (guix store)
  #:use-module (ice-9 format)
  #:use-module (ice-9 iconv)
  #:use-module (ice-9 string-fun)
  #:use-module (json)
  #:use-module (rnrs bytevectors)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-2)
  #:use-module (srfi srfi-34)
  #:use-module (srfi srfi-35)
  #:use-module (ssh key)
  #:use-module (ssh sftp)
  #:use-module (ssh shell)
  #:use-module (web client)
  #:use-module (web request)
  #:use-module (web response)
  #:use-module (web uri)
  #:export (digital-ocean-configuration
            digital-ocean-configuration?

            digital-ocean-configuration-ssh-key
            digital-ocean-configuration-tags
            digital-ocean-configuration-region
            digital-ocean-configuration-size
            digital-ocean-configuration-enable-ipv6?

            digital-ocean-environment-type))

;;; Commentary:
;;;
;;; This module implements a high-level interface for provisioning "droplets"
;;; from the Digital Ocean virtual private server (VPS) service.
;;;
;;; Code:

(define %api-base "https://api.digitalocean.com")

(define %digital-ocean-token
  (make-parameter (getenv "GUIX_DIGITAL_OCEAN_TOKEN")))

(define* (post-endpoint endpoint body)
  "Encode BODY as JSON and send it to the Digital Ocean API endpoint
ENDPOINT. This procedure is quite a bit more specialized than 'http-post', as
it takes care to set headers such as 'Content-Type', 'Content-Length', and
'Authorization' appropriately."
  (let* ((uri (string->uri (string-append %api-base endpoint)))
         (body (string->bytevector (scm->json-string body) "UTF-8"))
         (headers `((User-Agent . "Guix Deploy")
                    (Accept . "application/json")
                    (Content-Type . "application/json")
                    (Authorization . ,(format #f "Bearer ~a"
                                              (%digital-ocean-token)))
                    (Content-Length . ,(number->string
                                        (bytevector-length body)))