dotfiles/nixos/systems/heater/arma3.nix

{
  inputs',
  pkgs,
  lib,
  ...
}: let
  mods = [
    {
      id = "463939057";
      name = "ACE";
    }
    {
      id = "2867537125";
      name = "Antistasi";
    }
    {
      id = "450814997";
      name = "CBA_A3";
    }
    {
      id = "843425103";
      name = "RHSAFRF";
    }
    {
      id = "843593391";
      name = "RHSGREF";
    }
    {
      id = "843632231";
      name = "RHSSAF";
    }
    {
      id = "843577117";
      name = "RHSUSAF";
    }
  ];

  inherit
    (lib)
    getExe
    getExe'
    concatMapStringsSep
    ;
in {
  networking.nat.internalInterfaces = [
    "arma3"
  ];
  networking.nat = {
    forwardPorts =
      map (port: {
        destination = "10.99.99.2:${toString port}";
        proto = "udp";
        sourcePort = port;
      })
      [
        2302
        2303
        2304
      ];
  };

  ucontainers."arma3" = {
    network = [
      {
        hostAddress = "10.99.99.1/24";
        guestAddress = "10.99.99.2/24";
        hostInterface = "arma3";
        guestInterface = "eth0";
      }
    ];
    settings = {
      ephemeral = true;
      bind = [
        "/etc/resolv.conf"
        "/var/lib/arma3/steam_library:/home/steam/Steam"
        "/var/lib/arma3/steam:/home/steam/.local/share/Steam"
        "/var/lib/arma3/game:/var/lib/game"
        "/var/lib/arma3/secret:/secret"
      ];
    };
    path =
      (inputs'.nixng.nglib.makeSystem {
        inherit (pkgs.stdenv) system;
        inherit (inputs') nixpkgs;
        name = "arma3";

        config = {
          dumb-init = {
            enable = true;
            type.services = {};
          };

          nixpkgs.pkgs = pkgs;

          init.services.network = {
            enabled = true;
            script = pkgs.writeShellScript "network-start" ''
              ip addr add "10.99.99.2/24" dev "eth0"
              ip link set "eth0" up
              ip route add "10.99.99.0/24" dev "eth0"
              ip route add default via "10.99.99.1" dev "eth0"

              touch /etc/hosts

              exec sleep infinity
            '';
          };

          users.users."steam" = {
            uid = 1001;
            home = "/home/steam";
            group = "steam";
          };

          users.groups."steam" = {
            gid = 1001;
          };

          ## Steam doesn't allow me to download the mods as that account doesn't own Arma 3...
          # ${concatMapStringsSep "\n" (mod: ''
          #     HOME=/home/steam USER=steam chpst -U steam:steam -u steam:steam ${getExe' pkgs.steamcmd "steamcmd"} \
          #       +login "$(cat /secret/user | tr -d '\n ')" "$(cat /secret/password | tr -d '\n ')" \
          #       +"workshop_download_item 107410 ${mod.id}" validate \
          #       +quit

          #     ln -sf /home/steam/Steam/steamapps/workshop/content/107410/${mod.id} /var/lib/game/mods/@${mod.name}
          #   '')
          #   mods}

          init.services.steam-login = {
            enabled = true;
            script = pkgs.writeShellScript "steam-login-start" ''
              set -e -o pipefail

              mkdir -p /home/steam
              chown steam:steam -R /home/steam
              chown steam:steam -R /var/lib/game
              HOME=/home/steam USER=steam chpst -U steam:steam -u steam:steam ${getExe' pkgs.steamcmd "steamcmd"} \
                +force_install_dir /var/lib/game \
                +login "$(cat /secret/user | tr -d '\n ')" "$(cat /secret/password | tr -d '\n ')" \
                +app_update 233780 validate \
                +quit

              ${concatMapStringsSep "\n" (
                  mod: ''
                    ln -sf /var/lib/game/mods/${mod.id} /var/lib/game/mods/@${mod.name}
                  ''
                )
                mods}

              sv start arma3
              exec sleep infinity
            '';
          };

          init.services.arma3 = {
            dependencies = [
              "steam-login"
            ];
            enabled = false;
            script = pkgs.writeShellScript "arma3-start" ''
              cd /var/lib/game
              PATH=${pkgs.coreutils}/bin:$PATH LD_LIBRARY_PATH=${pkgs.stdenv.cc.cc.lib}/lib:$PWD exec \
                chpst -u steam:steam \
                ${getExe' pkgs.glibc "ld.so"} ./arma3server_x64 \
                  -config=./server.cfg \
                ${concatMapStringsSep " \\\n" (
                  mod: "-mod=./mods/${mod.id}"
                )
                mods}
            '';
          };
        };
      })
      .config
      .system
      .build
      .toplevel;
  };
}