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

with lib;

let

  cfg  = config.services.etherpad;
  ethernet-pkg = import ./etherpad-pkg.nix;
  nodePackages = import ./node-packages.nix;
in

{

  ###### interface

  options = {

    services.etherpad = {

      enable = mkOption {
        type = types.bool;
        default = false;
        description = ''
          Whether to enable etherpad service.
        '';
      };
    };

  };


  ###### implementation

  config =  mkIf cfg.enable {
      environment.systemPackages = [nodePackages ethernet-pkg pkgs.nodejs pkgs.curl];
      systemd.services.etherpad = {
        description = "etherpad service";
        serviceConfig = {
          Type = "simple";
	  Restart   = "always";
	  User      = "etherpad";
          ExecStart = "${pkgs.nodejs} ${ethernet-pkg}/src/node/server.js";
        };
        wantedBy = [ "multi-user.target" ];
      };
  };
}