# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running 'nixos-help').

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

{

  services = {
    # Enable the login manager
    displayManager.cosmic-greeter.enable = lib.mkDefault true;
    # Enable the COSMIC DE itself
    desktopManager.cosmic = {
      enable = lib.mkDefault true;
      # Enable XWayland support in COSMIC
      xwayland.enable = lib.mkDefault true;
    };
    # to avoid a timeout on shutdown, enable the GeoClue 2 service without the demo agent
    # will not be needed in future version of cosmic : testing or 25.11
    geoclue2 = {
      enable = true;
      enableDemoAgent = false;
    };
  };

  environment.sessionVariables = {
    # to make Clipboard Manager work
    COSMIC_DATA_CONTROL_ENABLED = 1;
    # enable Ozone Wayland support in Chromium and Electron
    NIXOS_OZONE_WL = "1";
  };

  # to allow to open link in web browser from any app
  systemd.user.extraConfig = ''DefaultEnvironment="PATH=/run/wrappers/bin:/etc/profiles/per-user/%u/bin:/nix/var/nix/profiles/default/bin:/run/current-system/sw/bin"'';

  specialisation = {
    gnome.configuration = {
      services = {
        # Disable Cosmic
        desktopManager.cosmic = {
          enable = false;
          xwayland.enable = false;
        };
        displayManager.cosmic-greeter.enable = false;
        # Enable Gnome
        xserver = {
          enable = true;
          desktopManager.gnome.enable = true;
          displayManager.gdm.enable = true;
        };
      };
      environment.systemPackages = with pkgs; [
        adwaita-icon-theme
        gnomeExtensions.appindicator
        gnomeExtensions.arcmenu
        gnomeExtensions.blur-my-shell
        gnomeExtensions.caffeine
        gnomeExtensions.clipboard-indicator
        gnomeExtensions.clipboard-history
        gnomeExtensions.compiz-alike-magic-lamp-effect
        gnomeExtensions.compiz-windows-effect
        gnomeExtensions.coverflow-alt-tab
        gnomeExtensions.custom-accent-colors
        gnomeExtensions.dash-to-panel
        gnomeExtensions.gtk4-desktop-icons-ng-ding
#        gnomeExtensions.put-windows
        gnomeExtensions.transparent-window-moving
        gnomeExtensions.unblank
        gnomeExtensions.window-state-manager
        gnome-settings-daemon
        gnome-themes-extra
        gnome-tweaks
      ];
      programs.dconf = {
        enable = true;
        profiles = {
          user.databases = [{
            settings = with lib.gvariant; {
              "org/gnome/desktop/interface" = {
                cursor-theme = "Adwaita";
                gtk-theme = "Adwaita";
                icon-theme = "Adwaita";
                clock-format = "24h";
                clock-show-weekday = true;
                clock-show-seconds = true;
                show-battery-percentage = true;
              };
              "org/gnome/desktop/calendar".show-weekdate = true; 
            
              "org/gtk/settings/file-chooser" = {
                sort-directories-first = true;
#               show-hidden = true;
#               view-type = "list";
              };

              "org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/custom0" = {
                binding = "<Control><Alt>t";
                command = "kgx";
                name = "Terminal";
              };

              "org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/custom1" = {
                binding = "<Control><Alt>m";
                command = "gnome-system-monitor";
                name = "Monitor";
              };

              "org/gnome/settings-daemon/plugins/media-keys".custom-keybindings = [
                "/org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/custom0/"
                "/org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/custom1/"
              ];
            
              "org/gnome/shell".enabled-extensions = [
                "appindicatorsupport@rgcjonas.gmail.com"
                "arcmenu@arcmenu.com"
                "auto-move-windows@gnome-shell-extensions.gcampax.github.com"
                "blur-my-shell@aunetx"
                "caffeine@patapon.info"
                "clipboard-history@alexsaveau.dev"
                "CoverflowAltTab@palatis.blogspot.com"
                "custom-accent-colors@demiskp"
                "dash-to-panel@jderose9.github.com"
                "gsconnect@andyholmes.github.io"
                "gtk4-ding@smedius.gitlab.com"
                "transparent-window-moving@noobsai.github.com"
                "user-theme@gnome-shell-extensions.gcampax.github.com"
                "workspace-switch-wraparound@theychx.org"
              ];
         
#             "org/gnome/shell".favorite-apps = [
#               "firefox.desktop"
#               "thunderbird.desktop"
#               "element-desktop.desktop"
#               "org.keepassxc.KeePassXC.desktop"
#               "org.gnome.Nautilus.desktop"
#               "org.gnome.TextEditor.desktop"
#             ];
         
              "org/gnome/shell/extensions/dash-to-panel" = {
                # Even when we are not using multiple panels on multiple monitors,
                # the extension still creates them in the config, so we set the same
                # configuration for each (up to 2 monitors).
                animate-appicon-hover =  true;
                dot-position = "BOTTOM";
                dot-style-focused = "METRO";
                dot-style-unfocused = "DOTS";
                intellihide = false;
#                panel-positions = builtins.toJSON (lib.genAttrs [ "0" "1" ] (x: "TOP"));
#                panel-sizes = builtins.toJSON (lib.genAttrs [ "0" "1" ] (x: 32));
                panel-element-positions = builtins.toJSON (lib.genAttrs [ "0" "1" ] (x: [
                  { element = "showAppsButton"; visible = false; position = "stackedTL"; }
                  { element = "activitiesButton"; visible = false; position = "stackedTL"; }
                  { element = "leftBox"; visible = true; position = "stackedTL"; }
                  { element = "taskbar"; visible = true; position = "centered"; }
                  { element = "centerBox"; visible = false; position = "stackedBR"; }
                  { element = "rightBox"; visible = true; position = "stackedBR"; }
                  { element = "dateMenu"; visible = true; position = "stackedBR"; }
                  { element = "systemMenu"; visible = true; position = "stackedBR"; }
                  { element = "desktopButton"; visible = false; position = "stackedBR"; }
                ]));
                multi-monitors = true;
#                show-apps-icon-file = "${pkgs.nixos-icons}/share/icons/hicolor/scalable/apps/nix-snowflake-white.svg";
#                show-apps-icon-padding = mkInt32 4;
#                focus-highlight-dominant = true;
#                dot-size = mkInt32 0;
#                appicon-padding = mkInt32 2;
#                appicon-margin = mkInt32 0;
#                trans-use-custom-opacity = true;
#                trans-panel-opacity = 0.25;
#                show-favorites = false;
#                group-apps = false;
#                isolate-workspaces = true;
#                hide-overview-on-startup = true;
#                stockgs-keep-dash = true;
              };
         
              "org/gnome/shell/extensions/arcmenu" = {
                menu-layout = "Budgie";
                menu-button-icon = "Distro_Icon";
                distro-icon = "22";
              };
         
              "org/gnome/shell/extensions/custom-accent-colors" = {
                accent-color = "purple";
                theme-flatpak = true;
                theme-gtk3 = true;
                theme-shell = true;
              };

              "org/gnome/shell/extensions/user-theme".name = "Custom-Accent-Colors";
            };
          }];
        };
      };
      system.nixos.tags = [ "Gnome" ];
    };
  };
}