{ self, config, pkgs, ... }:
let
  lib = pkgs.lib;

  inherit (lib) fileContents mkIf;
  pkgBin = lib.dev.pkgBinNoDep pkgs;

  coreBin = v: "${pkgs.coreutils}/bin/${v}";
  nixBin = "${config.nix.package}/bin/nix";
in
{
  imports = [ ../cachix ../../locale ];

  boot = {
    tmpOnTmpfs = true;
    loader.systemd-boot.configurationLimit = 10;
  };

  console.font = "7x14";

  environment = {
    systemPackages = with pkgs; [
      binutils
      coreutils
      curl
      direnv
      dnsutils
      dosfstools
      fd
      git
      gotop
      gptfdisk
      iputils
      jq
      manix
      moreutils
      nix-index
      nmap
      ripgrep
      skim
      tealdeer
      usbutils
      utillinux
      whois
      bat
      exa
      git
      lm_sensors
      mkpasswd
      ntfs3g
      zoxide
      bottom
      amber
      unzip
      unrar
      grit
      hydra-check
      nix-index
    ];

    shellAliases =
      let ifSudo = string: mkIf config.security.sudo.enable string;
      in
      {
        gtw = "${pkgBin "grit"} tree wnv";
        gtwa = "${pkgBin "grit"} add -p wnv";
        gt = pkgBin "grit";

        g = pkgBin "git";

        grep = "${pkgs.ripgrep}/bin/rg";
        cat = "${pkgBin "bat"} -pp --theme=base16";
        c = "${pkgBin "bat"} -pp --theme=base16";

        df = "${coreBin "df"} -h";
        free = "${pkgs.procps}/bin/free -h";

        ls = pkgBin "exa";
        l = "${pkgBin "exa"} -lhg --git";
        la = "${pkgBin "exa"} -lhg --git -a";
        t = "${pkgBin "exa"} -lhg --git -T";
        ta = "${pkgBin "exa"} -lhg --git -a -T";

        n = nixBin;
        nf = "${nixBin} flake";
        nfc = "${nixBin} flake check";
        nfu = "${nixBin} flake update";
        nfua = "${nixBin} flake update --recreate-lock-file";
        nfs = "${nixBin} flake show";
        np = "${nixBin} profile";
        npl = "${nixBin} profile info";
        npi = "${nixBin} profile install";
        npr = "${nixBin} profile remove";
        nsh = "${nixBin} shell";
        nsr = "${nixBin} search";
        nsrp = "${nixBin} search nixpkgs";
        ndev = "${nixBin} develop";

        nosce = "cd /etc/nixos";
        nosr = ifSudo "sudo nixos-rebuild --fast";
        nosrs = ifSudo "sudo nixos-rebuild switch";
        nosrb = ifSudo "sudo nixos-rebuild boot";
        nosrt = ifSudo "sudo nixos-rebuild test";
        ncg = ifSudo "sudo nix-collect-garbage";
        ncgdo = ifSudo "sudo nix-collect-garbage --delete-old";

        top = "${pkgs.bottom}/bin/btm";

        myip =
          "${pkgs.dnsutils}/bin/dig +short myip.opendns.com @208.67.222.222 2>&1";
        mn = ''
          manix "" | grep '^# ' | sed 's/^# \(.*\) (.*/\1/;s/ (.*//;s/^# //' | sk --preview="manix '{}'" | xargs manix
        '';

        # fix nixos-option
        nixos-option = "nixos-option -I nixpkgs=${self}/lib/compat";

        # sudo
        s = ifSudo "sudo -E ";
        si = ifSudo "sudo -i";
        se = ifSudo "sudoedit";

        # top
        top = "gotop";

        # systemd
        ctl = "systemctl";
        stl = ifSudo "s systemctl";
        utl = "systemctl --user";
        ut = "systemctl --user start";
        un = "systemctl --user stop";
        up = ifSudo "s systemctl start";
        dn = ifSudo "s systemctl stop";
        jtl = "journalctl";
      };
  };

  system.activationScripts.diff = ''
    ${pkgs.nixUnstable}/bin/nix store \
        --experimental-features 'nix-command' \
        diff-closures /run/current-system "$systemConfig"
  '';

  nix = {
    autoOptimiseStore = true;
    gc.automatic = true;
    optimise.automatic = true;
    useSandbox = true;
    allowedUsers = [ "@wheel" ];
    trustedUsers = [ "root" "@wheel" ];
    extraOptions = ''
      min-free = 536870912
      keep-outputs = true
      keep-derivations = true
      fallback = true
    '';
  };

  programs.command-not-found.enable = false;
  home-manager.useGlobalPkgs = true;
  users.mutableUsers = false;

  services.earlyoom.enable = true;
}