{
  pkgs,
  lib,
  config,
  ...
}: {
  options = {
    alyraffauf.desktop.theme.enable =
      lib.mkEnableOption "GTK and Qt themes.";
    alyraffauf.desktop.theme.gtk = {
      name = lib.mkOption {
        description = "GTK theme name.";
        default = "Catppuccin-Frappe-Compact-Mauve-Dark";
        type = lib.types.str;
      };
      package = lib.mkOption {
        description = "GTK theme package.";
        default = pkgs.catppuccin-gtk.override {
          accents = ["mauve"];
          size = "compact";
          variant = "frappe";
          tweaks = ["normal"];
        };
        type = lib.types.package;
      };
    };
    alyraffauf.desktop.theme.iconTheme = {
      name = lib.mkOption {
        description = "Icon theme name.";
        default = "Papirus-Dark";
        type = lib.types.str;
      };
      package = lib.mkOption {
        description = "Icon theme package.";
        default = pkgs.catppuccin-papirus-folders.override {
          flavor = "frappe";
          accent = "mauve";
        };
        type = lib.types.package;
      };
    };
    alyraffauf.desktop.theme.cursorTheme = {
      name = lib.mkOption {
        description = "Cursor theme name.";
        default = "Catppuccin-Frappe-Dark-Cursors";
        type = lib.types.str;
      };
      size = lib.mkOption {
        description = "Cursor size.";
        default = 24;
        type = lib.types.int;
      };
      package = lib.mkOption {
        description = "Cursor theme package.";
        default = pkgs.catppuccin-cursors.frappeDark;
        type = lib.types.package;
      };
    };
    alyraffauf.desktop.theme.font = {
      name = lib.mkOption {
        description = "Font name.";
        default = "NotoSansNerdFont";
        type = lib.types.str;
      };
      size = lib.mkOption {
        description = "Font size.";
        default = 11;
        type = lib.types.int;
      };
      package = lib.mkOption {
        description = "Font package.";
        default = pkgs.nerdfonts.override {fonts = ["Noto"];};
        type = lib.types.package;
      };
    };
    alyraffauf.desktop.theme.terminalFont = {
      name = lib.mkOption {
        description = "Font name.";
        default = "NotoSansMNerdFont";
        type = lib.types.str;
      };
      size = lib.mkOption {
        description = "Font size.";
        default = 11;
        type = lib.types.int;
      };
      package = lib.mkOption {
        description = "Font package.";
        default = pkgs.nerdfonts.override {fonts = ["Noto"];};
        type = lib.types.package;
      };
    };
    alyraffauf.desktop.theme.colors = {
      text = lib.mkOption {
        description = "Text color.";
        default = "#FAFAFA";
        type = lib.types.str;
      };
      background = lib.mkOption {
        description = "Background color.";
        default = "#232634";
        type = lib.types.str;
      };
      primary = lib.mkOption {
        description = "Primary color.";
        default = "#CA9EE6";
        type = lib.types.str;
      };
      secondary = lib.mkOption {
        description = "Secondary color.";
        default = "#99D1DB";
        type = lib.types.str;
      };
      inactive = lib.mkOption {
        description = "Inactive color.";
        default = "#626880";
        type = lib.types.str;
      };
      shadow = lib.mkOption {
        description = "Drop shadow color.";
        default = "#1A1A1A";
        type = lib.types.str;
      };
    };
    alyraffauf.desktop.theme.wallpaper = lib.mkOption {
      description = "Default wallpaper.";
      default = "${config.xdg.dataHome}/backgrounds/jr-korpa-9XngoIpxcEo-unsplash.jpg";
      type = lib.types.str;
    };
  };

  config = lib.mkIf config.alyraffauf.desktop.theme.enable {
    home.pointerCursor = {
      gtk.enable = true;
      x11.enable = true;
      package = config.alyraffauf.desktop.theme.cursorTheme.package;
      name = config.alyraffauf.desktop.theme.cursorTheme.name;
      size = config.alyraffauf.desktop.theme.cursorTheme.size;
    };

    qt = {
      enable = true;
      platformTheme.name = "gtk";
      style.name = "gtk2";
    };

    gtk = {
      enable = true;

      theme = {
        package = config.alyraffauf.desktop.theme.gtk.package;
        name = config.alyraffauf.desktop.theme.gtk.name;
      };

      iconTheme = {
        package = config.alyraffauf.desktop.theme.iconTheme.package;
        name = config.alyraffauf.desktop.theme.iconTheme.name;
      };

      font = {
        name = "${config.alyraffauf.desktop.theme.font.name}-Regular";
        package = config.alyraffauf.desktop.theme.font.package;
        size = config.alyraffauf.desktop.theme.font.size;
      };

      gtk3.extraConfig = {gtk-application-prefer-dark-theme = 1;};

      gtk4.extraConfig = {gtk-application-prefer-dark-theme = 1;};
    };

    dconf.settings = {
      "org/gnome/desktop/interface" = {
        gtk-theme = config.alyraffauf.desktop.theme.gtk.name;
        color-scheme = "prefer-dark";
        cursor-theme = config.alyraffauf.desktop.theme.cursorTheme.name;
        cursor-size = config.alyraffauf.desktop.theme.cursorTheme.size;
      };
    };
  };
}