{ config, pkgs, lib, flakeRoot, ... }:
let
  repoWallpaperDir = flakeRoot.outPath + "/assets/conf/desktop/wallpaper";
  userRelRoot = ".config/nixos_conf/wallpaperstuff";
  userAbsRoot = "${config.home.homeDirectory}/${userRelRoot}";
  userVideoPath = "${userAbsRoot}/videos/myWallpaper.mp4";
in
{
  home.packages = [
    pkgs.mpvpaper
    pkgs.mpv
  ];
  # Sync repo wallpapers (including videos/) into ~/nixos_conf/wallpaperstuff
  home.file."${userRelRoot}" = {
    source = repoWallpaperDir;
    recursive = true;
  };
  systemd.user.services.mpvpaper-wallpaper = {
    Unit = {
      Description = "Video wallpaper (mpvpaper)";
      After = [ "graphical-session.target" ];
      PartOf = [ "graphical-session.target" ];
    };
    Service = {
      Type = "simple";
      ExecStart = ''
        ${pkgs.mpvpaper}/bin/mpvpaper \
        -p \
        -o "no-audio --loop-file=inf --no-terminal --really-quiet --panscan=1.0 --keepaspect=yes" \
        '*' "${userVideoPath}"
      '';
      Restart = "on-failure";
      RestartSec = 1;
    };
    Install = {
      WantedBy = [ "graphical-session.target" ];
    };
  };
}