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

let
  cfg = config.modules.system.vpns;
in
{
  options.modules.system.vpns = {
    enable = lib.mkEnableOption "enables vpns";
  
    # toggle for pia mexico w/ openvpn
    openvpn_pia_mexico = lib.mkOption {
      type = lib.types.bool;
      default = false;
      description = "enable pia vpn to mexico using openvpn";
    };
     wg_pia_mexico = lib.mkOption {
      type = lib.types.bool;
      default = false;
      description = "enable pia vpn to mexico using wireguard";
    };
    
  };

  config = lib.mkIf cfg.enable {
    
    # enable pia mexico w/ openvpn
    services.openvpn.servers = lib.mkIf cfg.openvpn_pia_mexico { 
      openvpn_pia_mexico = {
        config = ''
          config ${config.sops.secrets."openvpn_pia_mexico_config".path}
          auth-user-pass ${config.sops.secrets."_pia_auth".path}
        '';
      };
    };

    # enable pia mexico w/ wireguard
    networking.wireguard.interfaces = lib.mkIf cfg.wg_pia_mexico {
      wg_piamex = {
        privateKeyFile = config.sops.secrets."wg_pia_mexico_key".path;
        listenPort = 51820;
        ips = [ "10.4.244.34/32" ];

        peers = [
          {
            publicKey = "avK/Bdg+hyLMqP2k/7eEBTkxwCSzyy8FymwO/vFjbQg=";
            allowedIPs = [ "0.0.0.0/0" ];
            endpoint = "77.81.142.245:1337";
            persistentKeepalive = 25;
          }
        ];
        postUp = ''
          ip route add default dev wg_piamex table qbittorrent
          ip rule add uidrange 2003-2003 lookup qbittorrent
        '';
        preDown = ''
          ip rule del uidrange 2003-2003 lookup qbittorrent
        '';
      };
    };

    # secrets only if VPN is enabled
    sops.secrets = lib.mkIf cfg.enable {
      "wg_pia_mexico_key" = { owner = "root"; group = "root"; };
      "pia_auth" = { owner = "root"; group = "root"; };
      "openvpn_pia_mexico_config" = {owner = "root"; group = "root"; };
 
    };
  };
}