{ pkgs, lib, ... }:
let
  inherit (lib)
    makeBinPath;
in
{
  systemd.services.udp2tcp = {
    wantedBy = [ "multi-user.target" ];
    after = [ "network.target" ];

    path = with pkgs; [ dig.host ];

    restartIfChanged = true;

    script = ''
      ${pkgs.udp-over-tcp}/bin/udp2tcp\
        --udp-listen 127.0.0.1:6665 \
        --tcp-forward "64.225.104.221:6001"
    '';
  };

  systemd.services.udp2tcp-wake-restart = {
    wantedBy = [
      "suspend.target"
      "hibernate.target"
      "hybrid-sleep.target"
      "suspend-then-hibernate.target"
    ];
    after = [
      "suspend.target"
      "hibernate.target"
      "hybrid-sleep.target"
      "suspend-then-hibernate.target"
    ];

    script = ''
      systemctl restart udp2tcp.service
    '';
  };

  networking.networkmanager.dispatcherScripts = [
    {
      source = pkgs.writeShellScript "udp2tcp.sh"
        ''
          export PATH=${makeBinPath [ pkgs.wireguard-tools ]}:$PATH
          _interface="$1"
          _action="$2"

          echo "action: $_action interface: $_interface id: $CONNECTION_ID"
          case "$_action" in
            up)
              case "$_interface" in
                wlo1)
                  case "$CONNECTION_ID" in
                    VU-Campusnet)
                      wg set wg0 \
                        peer h4g6vWjOB6RS0NbrP/Kvb2CZeutm/F+ZfDbJmEd1Dgk= \
                        endpoint 127.0.0.1:6665
                      systemctl restart udp2tcp.service
                      ;;
                    *)
                      wg set wg0 \
                        peer h4g6vWjOB6RS0NbrP/Kvb2CZeutm/F+ZfDbJmEd1Dgk= \
                        endpoint 64.225.104.221:6666
                      systemctl stop udp2tcp.service
                      ;;
                  esac
                  ;;
                *)
                  ;;
              esac
              ;;
            down)
              wg set wg0 \
                peer h4g6vWjOB6RS0NbrP/Kvb2CZeutm/F+ZfDbJmEd1Dgk= \
                endpoint 64.225.104.221:6666
              systemctl stop udp2tcp.service
              ;;
            *)
              ;;
          esac
        '';
    }
    {
      source = pkgs.writeShellScript "nfs-mounts.sh"
        ''
          export PATH=${makeBinPath [ pkgs.iputils ]}:$PATH

          ping -c 1 -W 0.7 8.8.4.4 # > /dev/null 2>&1

          if [ $? -eq 0 ] ; then
            echo "Mounting network drives"
            systemctl start mnt-net-kyle.mount \
              mnt-net-cartman.mount \
              mnt-net-stan.mount \
              mnt-net-getmail.d.mount \
              mnt-net-mail\\x2dconfiguration &
          else
            echo "Unmounting network drives"
            umount -ql \
              /mnt/net/kyle \
              /mnt/net/cartman \
              /mnt/net/stan \
              /mnt/net/getmail.d \
              /mnt/net/mail-configuration &
          fi
        '';
    }
  ];
}