{ pkgs, ... }:
let
  wallpaper = "/home/matt/.config/wallpapers/wall.png";
  cursorTheme = "macOS-Monterey";
  cursorThemePkg = pkgs.apple-cursor;
  cursorSize = 24;
  gtkThemeSize = "compact";
  gtkThemeAccent = "blue";
  gtkThemeVariant = "macchiato";
  gtkTheme = "catppuccin-${gtkThemeVariant}-${gtkThemeAccent}-${gtkThemeSize}";
  gtkThemePkg = pkgs.catppuccin-gtk.override {
                  size = gtkThemeSize;
                  accents = [ gtkThemeAccent ];
                  variant = gtkThemeVariant;
                };
  iconTheme = "Colloid-dark"; # Colloid, Colloid-light, Colloid-dark
  iconThemePkg = pkgs.colloid-icon-theme;
in
{
  imports = [
    ./config.nix
    ./config/btop
    ./config/hypr
    ./config/kitty
    ./config/mako
    ./config/waybar
    ./config/wofi
  ];

  services = {
    hyprpaper = {
      enable = true;
      settings = {
        preload = [ wallpaper ];
        wallpaper = [
          "DP-1, ${wallpaper}"
          "DP-2, ${wallpaper}"
        ];
        splash = false;
      };
    };

    hypridle = {
      enable = true;
      settings = {
        general = {
          before_sleep_cmd = "loginctl lock-session";     # lock before suspend.
          after_sleep_cmd = "hyprctl dispatch dpms on";   # to avoid having to press a key twice to turn on the display.
          ignore_dbus_inhibit = false;
          lock_cmd = "pidof hyprlock || hyprlock";        # avoid starting multiple hyprlock instances.
        };
        listener = [
          # {
          #   timeout = 300; # 5min
          #   on-timeout = "brightnessctl -s set 10"; # set monitor backlight to minimum, avoid 0 on OLED monitor.
          #   on-resume = "brightnessctl -r"; # monitor backlight restore.
          # }
          {
            timeout = 900; # 15 min
            on-timeout = "loginctl lock-session"; # lock screen when timeout has passed
          }
          {
            timeout = 930; # 15.5 min
            on-timeout = "hyprctl dispatch dpms off"; # screen off when timeout has passed
            on-resume = "hyprctl dispatch dpms on"; # screen on when activity is detected after timeout has fired.
          }
          {
            timeout = 3600; # 1hr
            on-timeout = "systemctl suspend"; # suspend pc
          }
        ];
      };
    };
  };

  programs.hyprlock = {
    enable = true;
    settings = {
      background = [
        {
          monitor = "";
          path = wallpaper;   # supports png, jpg, webp (no animations, though)
          color = "rgba(25, 20, 20, 1.0)";

          # all these options are taken from hyprland, see https://wiki.hyprland.org/Configuring/Variables/#blur for explanations
          blur_passes = "3"; # 0 disables blurring
          blur_size = "7";
          noise = "0.0117";
          contrast = "0.8916";
          brightness = "0.8172";
          vibrancy = "0.1696";
          vibrancy_darkness = "0.0";
        }
      ];
      input-field = [
        {
          size = "200, 50";
          position = "0, -80";
          monitor = "DP-1";
          dots_center = true;
          fade_on_empty = true;
          font_color = "rgb(202, 211, 245)";
          inner_color = "rgb(91, 96, 120)";
          outer_color = "rgb(24, 25, 38)";
          bothlock_color = -1;
          outline_thickness = 5;
          placeholder_text = ''<span foreground="##cad3f5">Password...</span>'';
          shadow_passes = 2;
        }
      ];
    };
  };

  home.sessionVariables = {
    BROWSER = "firefox";
    EDITOR = "nano";
    TERMINAL = "kitty";
    NIXOS_OZONE_WL = "1";
    QT_QPA_PLATFORMTHEME = "gtk3";
    QT_SCALE_FACTOR = "1";
    MOZ_ENABLE_WAYLAND = "1";
    SDL_VIDEODRIVER = "wayland";
    QT_QPA_PLATFORM = "wayland-egl";
    QT_WAYLAND_DISABLE_WINDOWDECORATION = "1";
    QT_AUTO_SCREEN_SCALE_FACTOR = "1";
    GTK_CSD = "0";
#    WLR_DRM_DEVICES = "/dev/dri/card0";
#    WLR_NO_HARDWARE_CURSORS = "1"; 
    CLUTTER_BACKEND = "wayland";
    # WLR_RENDERER = "vulkan";
    XCURSOR_THEME = cursorTheme;
    XCURSOR_SIZE = cursorSize;
    GTK_THEME = gtkTheme;
    XDG_CURRENT_DESKTOP = "Hyprland";
    XDG_SESSION_DESKTOP = "Hyprland";
    XDG_SESSION_TYPE = "wayland";
    GTK_USE_PORTAL = "1";
    NIXOS_XDG_OPEN_USE_PORTAL = "1";
    XDG_CACHE_HOME = "\${HOME}/.cache";
    XDG_CONFIG_HOME = "\${HOME}/.config";
    #XDG_BIN_HOME = "\${HOME}/.local/bin";
    XDG_DATA_HOME = "\${HOME}/.local/share";
  };

  home.pointerCursor = {
    gtk.enable = true;
    package = cursorThemePkg;
    name  = cursorTheme;
    size = cursorSize;
  };

  gtk = {
    enable = true;

    cursorTheme = {
        name = cursorTheme; # macOS-[BigSur, Monterey]-[ , White, White-Windows, Windows]
        package = cursorThemePkg;
    };

    theme = {
      name = gtkTheme;
      package = gtkThemePkg;
    };

    iconTheme = {
      name = iconTheme;
      package = iconThemePkg;
    };

    gtk3.extraConfig = {
      # gtk-application-prefer-dark-theme = true;
      "AdwStyleManager:color-scheme" = "ADW_COLOR_SCHEME_PREFER_DARK";
    };

    gtk4.extraConfig = {
      # gtk-application-prefer-dark-theme = true;
      "AdwStyleManager:color-scheme" = "ADW_COLOR_SCHEME_PREFER_DARK";
    };

  };
}