{ config, lib, pkgs, ... }:

let
  inherit (lib) mkIf mkMerge mkThenElse;
  cfg = config.r6d.config-generator;
  computers = config.r6d.computers;
  profiles = config.r6d.profiles;
in

mkIf cfg.hydra-core {

  # Paquets
  environment.systemPackages = with pkgs; [
  ];

  # Services

  ## Hydra
  # 2. créer un utilisateur pour gérer hydra
  # su - hydra
  # hydra-create-user jpierre03 --password xxx --role 'admin'

  services.hydra = {
    enable = true;
    hydraURL = "http://hydra.${config.networking.hostName}";
    notificationSender = "hydra@${config.networking.hostName}";
    listenHost = "localhost";
    minimumDiskFree = 50; # Go
  };

  ## Ménage
  #nix.gc.automatic = true;

  ## Délégation des actions de compilation à la compilefarm

  ### Machines connues
  # 2. récupérer la clef publique du serveur ssh : ssh-keyscan localhost + l'ajouter dans les knownHosts
  
  programs.ssh.knownHosts = {
	"pedro.dubronetwork.fr".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIM7fjo2ysLqlfSo6BKnc6I6m1ayoPrbwEEyTKZmUzsOD";
  };

  # une fois installé :
  # 1. créer chef SSH : ssh-keygen -C "hydra@pedro.dubronetwork.fr" -N "" -f /etc/nixos/id_buildfarm
  # accessible à hydra.pedro.dubnronetwork.fr

  
  nix = {
    distributedBuilds = true;
    buildMachines = [
    #      { hostName = "pedro.dubronetwork.fr"; maxJobs = 2; speedFactor = 10; sshKey = "/etc/nixos/id_buildfarm"; sshUser = "root"; system = "x86_64-linux"; }
    ];
    extraOptions = "auto-optimise-store = true";
  };
  
}