{
  config,
  lib,
  inputs,
  pkgs,
  ...
}:
{
  imports = [ inputs.preload-ng.nixosModules.default ];

  ## Variaveis de ambiente contendo o aumento de cache para placas da nvidia
  environment.variables = {
    __GL_SHADER_DISK_CACHE_SIZE = "12000000000";
    VK_LAYER_PATH = "${pkgs.vulkan-validation-layers}/share/vulkan/explicit_layer.d";
  };

  ## Configuraçoes de boot para otimzar o kernel e alguns patchs para nvidia
  boot = {
    modprobeConfig.enable = true;
    kernelModules = [ "tcp_bbr" ];
    extraModprobeConfig = ''
      options nvidia NVreg_UsePageAttributeTable=1
      NVreg_InitializeSystemMemoryAllocations=0
      NVreg_DynamicPowerManagement=0x02 '';
    kernel.sysctl = {
      "kernel.split_lock_mitigate" = 0;
      "kernel.nmi_watchdog" = 0;
      "net.core.netdev_max_backlog" = 4096;
      "fs.file-max" = 2097152;
      "net.ipv4.tcp_congestion_control" = "bbr";
    };
  };

  services = {

    earlyoom = {
      enable = true;
      freeSwapThreshold = 2;
      freeMemThreshold = 2;
      extraArgs = [
        "-g"
        "--avoid"
        "'^(X|plasma.*|konsole|kwin|wayland|gnome.*)$'"
      ];
    };

    ## Otimizaçao do Udev para placas de Video da Nvidia
    udev = {
      enable = true;
      extraRules = ''
        # Enable runtime PM for NVIDIA VGA/3D controller devices on driver bind
        ACTION=="add|bind", SUBSYSTEM=="pci", DRIVERS=="nvidia", \
        ATTR{vendor}=="0x10de", ATTR{class}=="0x03[0-9]*", \
        TEST=="power/control", ATTR{power/control}="auto"

        # Disable runtime PM for NVIDIA VGA/3D controller devices on driver unbind
        ACTION=="remove|unbind", SUBSYSTEM=="pci", DRIVERS=="nvidia", \
        ATTR{vendor}=="0x10de", ATTR{class}=="0x03[0-9]*", \
        TEST=="power/control", ATTR{power/control}="on"

        ## celular


        # atack shark
        KERNEL=="hidraw*", ATTRS{idVendor}=="1d57", ATTRS{idProduct}=="fa60", MODE="0666", SYMLINK+="xenta-mouse-hidraw", TAG+="uaccess"
        KERNEL=="hidraw*", ATTRS{idVendor}=="1d57", ATTRS{idProduct}=="fa55", MODE="0666", SYMLINK+="xenta-mouse-hidraw", TAG+="uaccess"

        # Akko Keyboard (WebHID)
        KERNEL=="hidraw*", ATTRS{idVendor}=="3151", ATTRS{idProduct}=="502d", MODE="0666", TAG+="uaccess"
        SUBSYSTEM=="usb", ATTRS{idVendor}=="3151", ATTRS{idProduct}=="502d", MODE="0666", TAG+="uaccess"
      '';
    };

    preload-ng = {
      enable = true;
      settings = {
        cycle = 15;
        memTotal = -5;
        memFree = 70;
        memCached = 10;
        memBuffers = 50;
        minSize = 1000000;
        processes = 60;
        sortStrategy = 0;
        autoSave = 1800;
        mapPrefix = "/nix/store/;/run/current-system/;!/";
        exePrefix = "/nix/store/;/run/current-system/;!/";
      };
    };
  };

  systemd.services.set-min-free-mem = {
    description = "Set vm.min_free_kbytes dynamically";
    wantedBy = [ "multi-user.target" ];
    after = [ "local-fs.target" ];
    serviceConfig = {
      User = "root";
      RemainAfterExit = true;
    };
    script = ''
      TOTAL_MEM=$(${pkgs.gawk}/bin/awk '/MemTotal/ {printf "%.0f", $2 * 0.01}' /proc/meminfo)
      if [ -z "$TOTAL_MEM" ] || [ "$TOTAL_MEM" -eq 0 ]; then
        echo "Failed to calculate memory size" >&2
        exit 1
      fi
      ${pkgs.sysctl}/bin/sysctl -w vm.min_free_kbytes=$TOTAL_MEM
    '';
  };

  ## sistema de compressao compressao brtfs
  fileSystems = {
    "/" = {
      options = [ "compress=zstd:3" ];
    };
  };

  ## confiuraçao da zram
  zramSwap = {
    enable = true;
    memoryPercent = 40;
    algorithm = "zstd";
  };

}