{ config
, pkgs
, inputs
, lib
, ...
}:

let
  # uuids.enc = "e2abdea5-71dc-4a9e-aff3-242117342d60";
  uuids.boot = "49b5ab26-a8f4-4873-a235-da2b3608e870";
  uuids.swap = "b7eb326b-69d8-4347-a2dc-549ec6201e7f";
  uuids.root = "99cda95f-f866-42a0-883f-343ad3662920";
  parts = builtins.mapAttrs (k: v: "/dev/disk/by-uuid/${v}") uuids;
in

{
  imports = [
    ../hardware/kobo-clara
    ../hosts/ereader
  ];

  fonts.enableDefaultPackages = false;
  # defaults without noto-fonts-color-emoji
  fonts.packages = with pkgs; [
    dejavu_fonts
    freefont_ttf
    gyre-fonts # TrueType substitutes for standard PostScript fonts
    liberation_ttf
    unifont
  ];

  nixpkgs.overlays = [
    (self: super: let
      overrideFfmpeg = ffmpeg: ffmpeg.override {
        withAlsa = false;
        withJack = false;
        withMp3lame = false;
        withOgg = false;
        withOpus = false;
        withPulse = false;
        withSpeex = false;
        withVaapi = false;
        withVdpau = false;
        withVorbis = false;
      };
    in {
      ffmpeg = overrideFfmpeg super.ffmpeg;
      waybar = super.waybar.override {
        hyprlandSupport = false;
        jackSupport = false;
        mpdSupport = false;
        mprisSupport = false;
        pipewireSupport = false;
        pulseSupport = false;
        sndioSupport = false;
        cavaSupport = false;
        wireplumberSupport = false;
      };
      awesome = super.awesome.overrideAttrs (old: {
        # broken cross tests
        doCheck = false;
      });
      # ffmpeg isnt actually used in wlroots anymore, remove the useless dependency
      wlroots_0_17 = super.wlroots_0_17.overrideAttrs (old: {
        buildInputs = builtins.filter (x: x.pname != "ffmpeg") old.buildInputs;
      });
      # heif/avif support isnt worth an extra rust dependency
      imagemagick = super.imagemagick.override {
        libheifSupport = false;
      };
      jasper = super.jasper.override {
        enableHEIFCodec = false;
      };
      # no audio, so no need to bring in the audio libs
      SDL2 = super.SDL2.override {
        alsaSupport = false;
        pipewireSupport = false;
        pulseaudioSupport = false;
      };
      openalSoft = super.openalSoft.override {
        alsaSupport = false;
        pipewireSupport = false;
        pulseSupport = false;
      };
      openal = super.openal.override {
        alsaSupport = false;
        pipewireSupport = false;
        pulseSupport = false;
      };
      # luajit has to be built on a system with 32-bit pointer width when targeting 32-bit systems
      luajit = (import inputs.nixpkgs { system = "i686-linux"; }).pkgsCross.armv7l-hf-multiplatform.luajit;
      # fix cross https://github.com/NixOS/nixpkgs/pull/328919/
      texinfo = super.texinfo.overrideAttrs (old: {
        configureFlags = old.configureFlags
          ++ lib.optional
               (self.stdenv.hostPlatform != self.stdenv.buildPlatform)
               "texinfo_cv_sys_iconv_converts_euc_cn=yes";
      });
      koreader = super.koreader.overrideAttrs (old: {
        src = self.fetchurl {
          url = "https://github.com/koreader/koreader/releases/download/v${old.version}/koreader-${old.version}-armhf.deb";
          hash = "sha256-LgeWQcHm5Qq/7MUuidjily0WsOFZAWGWeO52jNHWKMw=";
        };
        meta = old.meta // {
          platforms = [ "armv7l-linux" ];
        };
      });
    })
  ];

  networking.wireless.iwd.enable = true;

  fileSystems = let
    neededForBoot = true;
  in {
    "/" =     { device = "none"; fsType = "tmpfs"; inherit neededForBoot;
                options = [ "defaults" "size=2G" "mode=755" ]; };
    "/persist" =
              { device = parts.root; fsType = "btrfs"; inherit neededForBoot;
                options = [ "discard=async" "compress=zstd:15" ]; };
    "/boot" = { device = parts.boot; fsType = "ext4"; };
  };

  swapDevices = [ { device = parts.swap; } ];
  boot.resumeDevice = parts.swap;

  system.build.rootfsImage = pkgs.callPackage "${pkgs.path}/nixos/lib/make-btrfs-fs.nix" {
    storePaths = config.system.build.toplevel;
    compressImage = true;
    volumeLabel = "NIX_ROOTFS";
    uuid = uuids.root;
  };
  system.build.bootFiles = pkgs.runCommand "kobo-clara-boot-files" {} ''
    mkdir -p "$out"
    ${config.boot.loader.generic-extlinux-compatible.populateCmd} -c ${config.system.build.toplevel} -d $out -g 0
  '';

  impermanence = {
    enable = true;
    path = /persist;
    directories = [
      { directory = /home/${config.common.mainUsername}; user = config.common.mainUsername; group = "users"; mode = "0700"; }
      { directory = /root; mode = "0700"; }
      { directory = /nix; }
      { directory = /secrets; mode = "0000"; }
    ];
  };
}