{ config, pkgs, flakeRoot, ... }:

let
  username   = config.defaultUser or "henrov";
  homeDir    = "/home/${username}";
  scriptFile = "${homeDir}/Wallpapers/set-wallpapers-at-logon.sh";
  socketFile = "/run/user/${config.users.users.${username}.uid or 1000}/wayland-1-swww-daemon.1.sock";
in
{
  ############################
  # System-wide packages
  ############################
  environment.systemPackages = with pkgs; [
    swww
    waypaper
    jq
    rsync
  ];

  ############################
  # swww daemon for the user
  ############################
  systemd.user.services.swwwDaemon = {
    description = "swww wallpaper daemon";
    after       = [ "graphical-session.target" ];
    wantedBy    = [ "default.target" ];
    serviceConfig = {
      ExecStart = "${pkgs.swww}/bin/swww daemon";
      Restart   = "always";
      Type      = "simple";
    };
  };

  ############################
  # Run the wallpaper script at login
  ############################
  systemd.user.services.wallpaperSyncLogin = {
    description = "Run wallpaper script at login";
    wantedBy    = [ "default.target" ];
    after       = [ "swwwDaemon.service" ];
    requires    = [ "swwwDaemon.service" ];
    serviceConfig = {
      Type        = "oneshot";
      Environment = "PATH=/run/current-system/sw/bin:/usr/bin:/bin";
      # Wait for the swww socket
      ExecStartPre = ''
        for i in $(seq 1 10); do
          [ -S ${socketFile} ] && exit 0
          sleep 0.5
        done
        echo "swww daemon socket not found, aborting"
        exit 1
      '';
      ExecStart   = "${pkgs.bash}/bin/bash ${scriptFile}";
      Restart     = "on-failure";
    };
  };

  ############################
  # Timer: run service every 15 minutes
  ############################
  systemd.user.timers.wallpaperSyncTimer = {
    description              = "Run wallpaperSync service every 15 minutes";
    wantedBy                 = [ "timers.target" ];
    timerConfig.OnUnitActiveSec = "15min";
    timerConfig.Persistent      = true;
  };

  ############################
  # Run the script every 15 min
  ############################
  systemd.user.services.wallpaperSync = {
    description = "Run wallpaper script periodically";
    wantedBy   = [ "default.target" ];
    after      = [ "swwwDaemon.service" ];
    requires   = [ "swwwDaemon.service" ];
    serviceConfig = {
      Type        = "oneshot";
      Environment = "PATH=/run/current-system/sw/bin:/usr/bin:/bin";
      ExecStart   = "${pkgs.bash}/bin/bash ${scriptFile}";
      Restart     = "on-failure";
    };
  };
}