nix-config-v2/modules/apps/gaming.nix

{
  config,
  lib,
  pkgs,
  ...
}: let
  cfg = config.gaming;
in {
  options.gaming = {
    steam = {
      enable = lib.mkEnableOption "Steam gaming platform";

      firewall = {
        remotePlay = lib.mkOption {
          type = lib.types.bool;
          default = true;
          description = "Open firewall ports for Steam Remote Play";
        };

        localNetworkGameTransfers = lib.mkOption {
          type = lib.types.bool;
          default = true;
          description = "Open firewall ports for local network game transfers";
        };
      };
    };

    gamemode = {
      enable = lib.mkEnableOption "Gamemode performance optimization";
      config = lib.mkOption {
        type = lib.types.attrs;
        default = {};
        description = "Custom Gamemode configuration options";
      };
    };

    gamescope = {
      enable = lib.mkEnableOption "Gamescope gaming compositor";
      settings = {
        resolution = lib.mkOption {
          type = lib.types.nullOr (lib.types.submodule {
            options = {
              width = lib.mkOption {
                type = lib.types.int;
                description = "Gamescope rendering width";
              };
              height = lib.mkOption {
                type = lib.types.int;
                description = "Gamescope rendering height";
              };
            };
          });
          default = null;
          description = "Gamescope rendering resolution";
        };

        refreshRate = lib.mkOption {
          type = lib.types.nullOr lib.types.int;
          default = null;
          description = "Gamescope rendering refresh rate";
        };
      };
    };

    lutris = {
      enable = lib.mkEnableOption "Lutris game manager and launcher";
      package = lib.mkOption {
        type = lib.types.package;
        default = pkgs.lutris;
        description = "Lutris package to use (allows for custom or alternative packages)";
      };

      wine = {
        enable = lib.mkEnableOption "Enable Wine support for Lutris";
        package = lib.mkOption {
          type = lib.types.package;
          default = pkgs.wine-staging;
          description = "Wine package to use with Lutris";
        };
      };

      # Compatibility layers for Lutris
      compatibility = {
        protonSupport = lib.mkOption {
          type = lib.types.bool;
          default = true;
          description = "Enable Proton-like compatibility layers for Lutris";
        };

        extraTools = lib.mkOption {
          type = lib.types.listOf lib.types.package;
          default = [];
          description = "Additional compatibility tools for Lutris";
        };
      };

      # Additional system packages for Lutris
      extraPackages = lib.mkOption {
        type = lib.types.listOf lib.types.package;
        default = [];
        description = "Additional packages to install alongside Lutris";
      };
    };

    minecraft = {
      enable = lib.mkEnableOption "Minecraft in the form of PrismLauncher, a tool for launching Minecraft";
    };
    ffxiv = {
      enable = lib.mkEnableOption "Final Fantasy XIV and it's accompanied (unofficial) launcher";
    };
  };

  config = {
    programs.steam = lib.mkIf cfg.steam.enable {
      enable = true;
      remotePlay.openFirewall = cfg.steam.firewall.remotePlay;
      localNetworkGameTransfers.openFirewall = cfg.steam.firewall.localNetworkGameTransfers;
    };

    programs.gamemode = lib.mkIf cfg.gamemode.enable {
      enable = true;
      settings = cfg.gamemode.config;
    };

    programs.gamescope = lib.mkIf cfg.gamescope.enable {
      enable = true;

      # Apply custom resolution if specified
      args =
        lib.optional (cfg.gamescope.settings.resolution != null) [
          "-w"
          (toString cfg.gamescope.settings.resolution.width)
          "-h"
          (toString cfg.gamescope.settings.resolution.height)
        ]
        ++ lib.optional (cfg.gamescope.settings.refreshRate != null) [
          "-r"
          (toString cfg.gamescope.settings.refreshRate)
        ];
    };

    environment.systemPackages =
      (lib.optionals cfg.lutris.enable (
        [cfg.lutris.package] ++
        (lib.optionals cfg.lutris.wine.enable [
          cfg.lutris.wine.package
          pkgs.winetricks
        ]) ++
        (lib.optionals cfg.lutris.compatibility.protonSupport [
          pkgs.protonup-ng
          pkgs.protonup-qt
        ]) ++
        cfg.lutris.compatibility.extraTools ++
        cfg.lutris.extraPackages
      )) ++
      (lib.optionals cfg.minecraft.enable [pkgs.prismlauncher]) ++
      (lib.optionals cfg.ffxiv.enable [pkgs.xivlauncher]);
  };
}