{ pkgs, lib, user, host, secrets, ...}:
let 
  devices = {
    north = { name = "NxNORTH"; id = ""; };
    xps = { name = "NxXPS"; id = ""; };
    ace = { name = "NxACE"; id = ""; };
    s21u = { name = "NxS21U"; id = ""; };
    diane = { name = "diane"; id = ""; };
    daniel = { name = "daniel"; id = ""; };
    tessa = { name = "tessa"; id = ""; };
    georg = { name = "georg"; id = ""; };
  };
  conv = _: device: with device; { "${name}" = {id = id;};}; 
  dirs = {
    default = { name = "sync"; path = "/home/${user}/sync"; };
  };
  justname = devices: (builtins.map (device: device.name)) devices;
  cd = /home/${user}/.config/syncthing;
in 
lib.mkIf (user != "tv")
{
  services.syncthing = {
    enable = true;
    user = "${user}";
    dataDir = "/home/${user}/.local/share/syncthing"; # useless ?
    configDir = cd; 
    # key = builtins.toFile "key.pem" secrets.syncthing.${host}.key;
    # cert = builtins.toFile "cert.pem" secrets.syncthing.${host}.cert;
    # overrideDevices = true;    
    # overrideFolders = true;    
    settings = {
      devices = with (builtins.mapAttrs conv devices); if (host == "NxXPS") then (
        north // ace // s21u
      ) else if (host == "NxNORTH") then (
        xps // ace // s21u
      ) else (
        north // xps // s21u // diane // daniel // tessa // georg 
      );
      folders = with dirs; if (host == "NxXPS") then {
        "${default.name}" = {        
          path = default.path;
          devices = with devices; (justname [ north ace s21u ]);     
        };
      } else {
        what = "dman";
      };
    };
  };
  
}