# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).
{
  config,
  pkgs,
  ...
}: {
  imports = [
    # Include the results of the hardware scan.
    ./hardware.nix
  ];

  programs.nix-ld = {
    enable = true;
  };

  boot.initrd.systemd = {
    enable = true;
    tpm2 = {enable = true;};
    dbus = {enable = true;};
  };

  boot.kernelPackages = pkgs.linuxPackages_cachyos;

  boot.kernelParams = [
    "default_hugepagesz=1G"
    "hugepagesz=1G"
  ];

  boot.kernel.sysctl = {
    "vm.nr_hugepages" = 512;
    "vm.swappiness" = 200;
    "net.core.netdev_max_backlog" = 32768;
    "net.core.somaxconn" = 16384;
    "net.core.rmem_default" = 1048576;
    "net.core.rmem_max" = 16777216;
    "net.core.wmem_default" = 1048576;
    "net.core.wmem_max" = 16777216;
    "net.core.optmem_max" = 65536;
    "net.ipv4.tcp_rmem" = "4096 1048576 2097152";
    "net.ipv4.tcp_wmem" = "4096 65536 16777216";
    "net.ipv4.udp_rmem_min" = 8192;
    "net.ipv4.udp_wmem_min" = 8192;
    "net.ipv4.tcp_fastopen" = 3;
    "net.core.default_qdisc" = "cake";
    "net.ipv4.tcp_congestion_control" = "bbr";
    "vm.dirty_ratio" = 20;
    "vm.dirty_background_ratio" = 10;
    "vm.vfs_cache_pressure" = 25;
    "vm.hugetlb_optimize_vmemmap" = 1;
  };

  services.scx = {
    enable = true;
    scheduler = "scx_lavd";
    extraArgs = ["--performance"];
  };

  boot.runSize = "100%";
  boot.devSize = "100%";
  boot.devShmSize = "100%";
  boot.tmp.useTmpfs = true;
  boot.tmp.tmpfsSize = "100%";
  boot.tmp.cleanOnBoot = true;

  fileSystems."/" = {
    device = "/dev/disk/by-uuid/11a954cd-1e6b-40e5-9322-e4b5349076fd";
    fsType = "btrfs";
    options = ["compress=zstd:6" "discard" "flushoncommit" "subvol=@"];
  };

  services.btrfs.autoScrub = {
    fileSystems = ["/"]; # Assuming root is formatted with Btrfs.
    interval = "daily";
    enable = true;
  };

  swapDevices = [
    {
      device = "/dev/disk/by-uuid/4d101e1e-8f76-472e-8282-62bb23d122e4";
      priority = 50;
    }
  ];

  zramSwap = {
    enable = true;
    priority = 100;
    memoryPercent = 100;
  };

  nix.gc = {
    automatic = true;
    options = "-d";
  };

  nix.optimise.automatic = true;

  nix.settings = {
    experimental-features = "cgroups dynamic-derivations flakes nix-command recursive-nix";
    auto-optimise-store = true;
    http-connections = 0;
    download-buffer-size = 671088640;
    max-jobs = "auto";
    sync-before-registering = true;
    use-cgroups = true;
  };

  boot.initrd.kernelModules = ["amdgpu"];

  # Processor settings for AMD
  hardware.cpu.amd = {
    sev.enable = true;
    updateMicrocode = true;
  };

  # Bootloader.
  boot.loader.systemd-boot = {
    enable = true;
    edk2-uefi-shell = {enable = true;};
    memtest86 = {enable = true;};
    configurationLimit = 3;
  };

  boot.plymouth = {
    enable = true;
  };

  boot.loader.efi.canTouchEfiVariables = true;

  networking.hostName = "zirconium"; # Hostname.

  networking.networkmanager = {
    enable = true;
    dns = "systemd-resolved";
    ethernet = {
      macAddress = "random";
    };
    wifi = {
      backend = "iwd";
      macAddress = "random";
    };
  };

  networking.tempAddresses = "default";

  # Set your time zone.
  time.timeZone = "America/Montevideo";

  # Select internationalisation properties.
  i18n.defaultLocale = "en_US.UTF-8";

  i18n.extraLocaleSettings = {
    LC_ADDRESS = "en_US.UTF-8";
    LC_IDENTIFICATION = "en_US.UTF-8";
    LC_MEASUREMENT = "en_US.UTF-8";
    LC_MONETARY = "en_US.UTF-8";
    LC_NAME = "en_US.UTF-8";
    LC_NUMERIC = "en_US.UTF-8";
    LC_PAPER = "en_US.UTF-8";
    LC_TELEPHONE = "en_US.UTF-8";
    LC_TIME = "en_US.UTF-8";
  };

  # Load AMD GPU drivers early
  hardware.amdgpu.initrd = {
    enable = true;
  };

  hardware.amdgpu.opencl = {
    enable = true;
  };

  # Graphics
  hardware.graphics = {
    enable = true;
    enable32Bit = true;
  };

  # Enable the X11 windowing system.
  services.xserver.enable = true;
  services.xserver.videoDrivers = ["amdgpu"];
  services.xserver.updateDbusEnvironment = true;
  services.xserver.enableTearFree = true;

  qt = {
    platformTheme = "kde";
  };

  # TLP
  services.power-profiles-daemon.enable = false; # We disable this because it sucks
  services.tlp.enable = true;
  services.tlp.settings = {
    CPU_DRIVER_OPMODE_ON_AC = "active";
    CPU_DRIVER_OPMODE_ON_BAT = "active";
    CPU_SCALING_GOVERNOR_ON_AC = "performance";
    CPU_SCALING_GOVERNOR_ON_BAT = "schedutil";
    CPU_BOOST_ON_AC = 1;
    CPU_BOOST_ON_BAT = 0;
    PLATFORM_PROFILE_ON_AC = "performance";
    PLATFORM_PROFILE_ON_BAT = "low-power";
    DISK_IOSCHED = "kyber";
    RADEON_DPM_PERF_LEVEL_ON_AC = "high";
    WIFI_PWR_ON_AC = "off";
    WIFI_PWR_ON_BAT = "off";
  };

  # Configure keymap in X11
  services.xserver.xkb = {
    layout = "us";
    variant = "";
  };

  # Enable sound with pipewire.
  hardware.pulseaudio.enable = false;
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
    jack.enable = true;
  };

  # Enable touchpad support (enabled default in most desktopManager).
  services.libinput.enable = true;

  users.defaultUserShell = pkgs.zsh;
  environment.shells = with pkgs; [zsh];

  programs.zsh = {
    enable = true;
    enableCompletion = true;
    autosuggestions = {
      enable = true;
      strategy = ["completion"];
    };

    zsh-autoenv = {
      enable = true;
    };

    syntaxHighlighting = {
      enable = true;
      highlighters = ["main" "brackets" "pattern" "cursor" "regexp" "root" "line"];
    };

    shellAliases = {
      ll = "ls -l";
      update = "sudo nixos-rebuild switch --upgrade";
    };

    ohMyZsh = {
      enable = true;
      plugins = ["git" "direnv" "fzf"];
      theme = "half-life";
    };
  };

  # DirEnv support
  programs.direnv = {
    enable = true;
    enableZshIntegration = true;
    nix-direnv = {
      enable = true;
    };
  };

  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.xmm = {
    isNormalUser = true;
    description = "xmm";
    extraGroups = ["wheel"];
    packages = with pkgs; [
      (wrapOBS {
        plugins = with pkgs.obs-studio-plugins; [
          obs-backgroundremoval
          obs-pipewire-audio-capture
        ];
      })
      vesktop
      vscode-fhs
      jetbrains-toolbox
      spotify
      alacritty
      halloy
      alacritty-theme
    ];
  };

  services.displayManager.sddm.enable = true;
  services.desktopManager.plasma6.enable = true;
  services.displayManager.defaultSession = "plasma";
  services.displayManager.sddm.wayland.enable = true;

  programs.dconf.enable = true;

  xdg.portal.enable = true;
  xdg.portal.xdgOpenUsePortal = true;

  # Allow unfree packages
  nixpkgs.config.allowUnfree = true;

  environment.plasma6.excludePackages = with pkgs.kdePackages; [
    konsole
    oxygen
    libqaccessibilityclient
  ];

  environment.systemPackages = with pkgs; [
    ripgrep
    simp1e-cursors
    alejandra
    pre-commit
    unzip
    neovim
    fuzzel
    fzf
    firefox_nightly
    wget2
    git
    btop-rocm
    llvmPackages_19.clangUseLLVM
    llvmPackages_19.clang-tools
    llvmPackages_19.libllvm
    scx_git.rustscheds
    hyfetch
    fastfetch
    ffmpeg-full
    gnumake
    cmake
    python3
    meson
    ninja
    nodePackages_latest.nodejs
    pnpm
    vulkanPackages_latest.vulkan-extension-layer
    vulkanPackages_latest.vulkan-loader
    vulkanPackages_latest.vulkan-validation-layers
    luajitPackages.luarocks
  ];

  fonts.packages = with pkgs; [
    noto-fonts
    noto-fonts-cjk-sans
    noto-fonts-cjk-serif
    noto-fonts-lgc-plus
    noto-fonts-color-emoji
    cozette
  ];

  # Improve font quality
  fonts.fontconfig = {
    defaultFonts = {
      serif = ["Liberation Serif"];
      sansSerif = ["Liberation Sans"];
      monospace = ["Liberation Mono"];
      emoji = ["Noto Color Emoji"];
    };
    cache32Bit = true;
  };

  services.dbus = {
    implementation = "broker";
  };

  # SECURITY
  security = {
    tpm2 = {
      enable = true;
    }; # Having TPM2 is nice.
    polkit = {
      enable = true;
    };
    protectKernelImage = true;
    forcePageTableIsolation = true;
  };

  systemd.tpm2.enable = true;

  networking.nameservers = [
    "1.1.1.1#one.one.one.one"
    "1.0.0.1#one.one.one.one"
    "2606:4700:4700::1111#one.one.one.one"
    "2606:4700:4700::1001#one.one.one.one"
  ];

  services.resolved = {
    enable = true;
    dnssec = "true";
    domains = ["~."];
    fallbackDns = [
      "1.1.1.1#one.one.one.one"
      "1.0.0.1#one.one.one.one"
      "2606:4700:4700::1111#one.one.one.one"
      "2606:4700:4700::1001#one.one.one.one"
    ];
    dnsovertls = "true";
    llmnr = "false";
  };

  networking.firewall.enable = true;

  system.stateVersion = "24.05"; # Did you read the comment?
}