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

let 
  cfg = config.samfelag.modules.desktop.polybar;
  polybar_pkg = pkgs.polybar.override {
    i3Support = true;
    pulseSupport = true;
  };
  script = ''
    polybar top &
    polybar bottom &
  '';
  # Paths
  paths = {
    config = ../../config/.config/polybar/config.ini;
    bars = ../../config/.config/polybar/bars;
    scripts = ../../config/.config/polybar/scripts;
  };
in {

  options.samfelag.modules.desktop.polybar = {
    enable = lib.mkEnableOption "polybar";
  };

  config = lib.mkIf cfg.enable {

    # - Configuration ----------------------------

    environment.systemPackages = [
      polybar_pkg
    ];

    hm.xdg.configFile."polybar/config.ini".source = paths.config;
    hm.xdg.configFile."polybar/bars".source = paths.bars;
    hm.xdg.configFile."polybar/scripts".source = paths.scripts;

    hm.systemd.user.services.polybar = {
      Unit = {
        Description = "Polybar status bar";
        PartOf = [ "tray.target" ];
        X-Restart-Triggers = [ "${paths.config}" ];
      };

      Service = {
        Type = "forking";
        PassEnvironment = "PATH";
        ExecStart =
          let scriptPkg = pkgs.writeShellScriptBin "polybar-start" script;
          in "${scriptPkg}/bin/polybar-start";
        Restart = "on-failure";
      };

      Install = { WantedBy = [ "tray.target" ]; };
    };
  };
}