#
# TODO:
#   - setdisplay gamma (gnome-gamma-tool)
#   - split into logical components (OS, hardware, ...)
#   - tablet-mode
#     - sensors
#   - home manager (???)
#
#
# 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, ... }: {
  imports = [ 
    # Include the results of the hardware scan.
    ./hardware-configuration.nix
  ];

  config = lib.mkMerge [
    # Base configuration...
    #
    # The configuration is split into two parts to allow for two stage updates to conserve space
    # on storage-limited systems.
    #
    # To run a two stage update do:
    #   $ sudo NIX_LIGHTWEIGHT=1 nixos-rebbuild switch
    #   $ reboot
    #   $ sudo nix-collect-garbage --delete-old
    #   $ sudo nixos-rebbuild switch
    #
    {
      nix.settings.experimental-features = [ 
        "nix-command" 
        "flakes"
      ];

      # Allow unfree packages
      nixpkgs.config.allowUnfree = true;


      # intel video drivers...
      # XXX move to hardware...
      nixpkgs.config.packageOverrides = pkgs: {
        intel-vaapi-driver = pkgs.intel-vaapi-driver.override { enableHybridCodec = true; };
      };
      #hardware.opengl = {
      hardware.graphics = {
        enable = true;
        extraPackages = with pkgs; [
          intel-media-driver # LIBVA_DRIVER_NAME=iHD
          intel-vaapi-driver # LIBVA_DRIVER_NAME=i965 (older but works better for Firefox/Chromium)
          vaapiVdpau
          libvdpau-va-gl
        ];
      };
      environment.sessionVariables = { LIBVA_DRIVER_NAME = "iHD"; }; # Force intel-media-driver
      

      # Bootloader.
      boot.loader.systemd-boot.enable = true;
      boot.loader.efi.canTouchEfiVariables = true;

      # XXX this is the same swap partition as fedora...
      boot.resumeDevice = "/dev/disk/by-uuid/6ac0c126-f701-43a5-8576-09cc76be1409";
      #boot.kernelParams = [ "systemd.unified_cgroup_hierarchy=0" "resume_offset=13465600" ];
      swapDevices = [ 
      #  { 
      #    device = "/var/lib/swapfile"; 
      #    size = 8*1024; 
      #  } 
        { device = "/dev/disk/by-uuid/6ac0c126-f701-43a5-8576-09cc76be1409"; } 
      ];

      boot.kernelPackages = pkgs.linuxPackages_latest;
      # prevent the console fonts from being reset on driver detect/load...
      # XXX move to hardware-specific-file...
      boot.initrd.kernelModules = [ "i915" ];

      # fix an issue with the touchpad/touchpoint not working after suspend...
      # XXX move to hardware-specific-file...
      boot.blacklistedKernelModules = [
        "i2c_i801"
      ];
      #powerManagement.resumeCommands = ''
      #  ${pkgs.kmod}/bin/modprobe -r i2c_i801
      #  ${pkgs.kmod}/bin/modprobe i2c_i801
      #'';

      # NOTE: this will be reset on loading of gpu driver, this can be fixed by preloading the 
      #       driver manually via:
      #         boot.initrd.kernelModules = [ "i915" ];
      console = {
        earlySetup = true;
        packages = with pkgs; [ 
          terminus_font 
        ];
        font = "ter-u18n";
      };

      # ThinkPad keyboard auto highlight...
      # XXX this fails...
      #services.tp-auto-kbbl = {
      #  enable = true;
      #  device = "/dev/input/event19";
      #  arguments = [
      #  ];
      #};

      networking.hostName = "yoga-nix";
      # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.

      # Configure network proxy if necessary
      # networking.proxy.default = "http://user:password@proxy:port/";
      # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";

      # Enable networking
      networking.networkmanager.enable = true;

      # Set your time zone.
      time.timeZone = "Europe/Moscow";

      # Select internationalisation properties.
      i18n.defaultLocale = "en_US.UTF-8";
      #i18n.supportedLocales = [
      #  "en_US.UTF-8"
      #  "ru_RU.UTF-8"
      #];
      i18n.extraLocaleSettings = {
        LC_ADDRESS = "ru_RU.UTF-8";
        LC_IDENTIFICATION = "ru_RU.UTF-8";
        LC_MEASUREMENT = "en_GB.UTF-8";
        LC_MONETARY = "ru_RU.UTF-8";
        LC_NAME = "ru_RU.UTF-8";
        LC_NUMERIC = "en_GB.UTF-8";
        LC_PAPER = "ru_RU.UTF-8";
        LC_TELEPHONE = "ru_RU.UTF-8";
        LC_TIME = "en_GB.UTF-8";
      };

      services.gpm.enable = true;

      services.devmon.enable = true;
      services.gvfs.enable = true;
      services.udisks2.enable = true;

      # Enable the X11 windowing system.
      services.xserver.enable = true;
      # Configure keymap in X11
      services.xserver.xkb = {
        layout = "us,ru";
        options = "grp:alt_shift_toggle";
      };
      services.xserver.excludePackages = [ 
        pkgs.xterm 
      ];
      services.xrdp.enable = true;
      services.xrdp.defaultWindowManager = "gnome-remote-desktop";
      services.xrdp.openFirewall = true;


      # Enable the GNOME Desktop Environment.
      services.xserver.displayManager.gdm.enable = true;
      services.xserver.desktopManager.gnome.enable = true;
      # set keyboard layouts and switching and othe key bindings...
      services.xserver.desktopManager.gnome.extraGSettingsOverrides = ''
        [org.gnome.desktop.input-sources]
        sources=[('xkb', 'us'),('xkb', 'ru')]
        per-window=true


        [org.gnome.desktop.wm.keybindings]
        switch-input-source=['<Alt>Shift_L']
        switch-input-source-backward=['<Shift>Alt_L']

        panel-run-dialog=['<Super>r']


        [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/custom0]
        binding='<Super>v'
        command='gvim'
        name='gvim'
      '';

      environment.gnome.excludePackages = [ 
        pkgs.gnome-tour 
      ];

      security.rtkit.enable = true;

      # Enable CUPS to print documents.
      services.printing.enable = true;

      # Enable sound with pipewire.
      #sound.enable = true;
      #hardware.pulseaudio.enable = false;
      services.pulseaudio.enable = false;
      services.pipewire = {
        enable = true;
        alsa.enable = true;
        alsa.support32Bit = true;
        pulse.enable = true;
        # If you want to use JACK applications, uncomment this
        #jack.enable = true;

        # use the example session manager (no others are packaged yet so this is enabled by default,
        # no need to redefine it in your config for now)
        #media-session.enable = true;
      };

      services.colord.enable = true;

      services.flatpak.enable = true;

      # Laptop configuration...
      services.logind.lidSwitch = "lock";

      services.fwupd.enable = true;

      services.openssh.enable = true;

      services.keyd = {
        enable = true;
        keyboards = {
          default = {
            ids = ["*"];
            settings = {
              main = {
                # Modern ThinkPad's printscrn to menu key...
                sysrq = "overload(prtsc, compose)";

                rightshift = "overload(rightshift, rightshift)";
                rightalt = "overload(rightalt, rightalt)";
              };
              prtsc = {
                # Gnome: screenshot...
                rightshift = "sysrq";

                # Gnome: minimize/maximize...
                up = "M-up";
                down = "M-down";

                # Gnome: next/prev workspace...
                left = "M-A-left";
                right = "M-A-right";
              };
              "rightshift:S" = {
                # Gnome: screenshot...
                sysrq = "sysrq";
              };
              "rightalt:A" = {
                # Gnome: move window...
                left = "macro(A-f7 20ms left left enter)";
                right = "macro(A-f7 20ms right right enter)";
                up = "macro(A-f7 20ms up up enter)";
                down = "macro(A-f7 20ms down down enter)";
              };
            };
          };
        };
      };
      # group keyd keyboard with the rest of the internal HID devices letting libinput correctly
      # handle touchpad features line "disable while typing"...
      environment.etc."libinput/local-overrides.quirks".text = ''
        [keyd]
        MatchUdevType=keyboard
        MatchName=keyd virtual keyboard
        AttrKeyboardIntegration=internal
      '';

      services.syncthing = {
        enable = true;
        user = "f_lynx";
        configDir = "/home/f_lynx/.config/syncthing/";
        dataDir = "/home/f_lynx/Sync/";
      };

      # Tor
      # see: https://nixos.wiki/wiki/Tor
      services.tor = {
        enable = true;
        client.enable = true;

        settings = {
          UseBridges = true;

          # obfs4...
          ClientTransportPlugin = "obfs4 exec ${pkgs.obfs4}/bin/lyrebird";
          Bridge = [
            "obfs4 51.68.49.200:61511 D44D53FEBBD9BFB59726B5818CEAAC5A31DFDD24 cert=1Lc1kIQ84lYXsH3duofsZWh0Eb+xVVEmmsZP8YN8tLuFfjYghEgFfIsLmo78kXX383KMRw iat-mode=0"
            "obfs4 141.95.109.208:45280 377396B625F2A76E7DF51C1BF952EBD683EC3EA1 cert=R5X70kY6Hd4DdW8JbCsxBPMaMREIOwaqbwYGMff1NyPYUwLxnlQqzkP2fTD8uo2R7A5ROQ iat-mode=0"
          ];

          ## snowflake... (XXX fails)
          #ClientTransportPlugin = "snowflake exec ${pkgs.snowflake}/bin/snowflake-client -url https://snowflake-broker.torproject.net.global.prod.fastly.net/ -front cdn.sstatic.net -ice stun:stun.l.google.com:19302,stun:stun.voip.blackberry.com:3478,stun:stun.altar.com.pl:3478,stun:stun.antisip.com:3478,stun:stun.bluesip.net:3478,stun:stun.dus.net:3478,stun:stun.epygi.com:3478,stun:stun.sonetel.com:3478,stun:stun.sonetel.net:3478,stun:stun.stunprotocol.org:3478,stun:stun.uls.co.za:3478,stun:stun.voipgate.com:3478,stun:stun.voys.nl:3478";
          #ClientTransportPlugin = "snowflake exec ${pkgs.snowflake}/bin/snowflake-client";
          #Bridge = [
          #  "snowflake 192.0.2.4:80 8838024498816A039FCBBAB14E6F40A0843051FA fingerprint=8838024498816A039FCBBAB14E6F40A0843051FA url=https://1098762253.rsc.cdn77.org/ fronts=www.cdn77.com,www.phpmyadmin.net ice=stun:stun.l.google.com:19302,stun:stun.antisip.com:3478,stun:stun.bluesip.net:3478,stun:stun.dus.net:3478,stun:stun.epygi.com:3478,stun:stun.sonetel.net:3478,stun:stun.uls.co.za:3478,stun:stun.voipgate.com:3478,stun:stun.voys.nl:3478 utls-imitate=hellorandomizedalpn"
          #  "snowflake 192.0.2.4:80 8838024498816A039FCBBAB14E6F40A0843051FA fingerprint=8838024498816A039FCBBAB14E6F40A0843051FA url=https://1098762253.rsc.cdn77.org/ fronts=www.cdn77.com,www.phpmyadmin.net ice=stun:stun.l.google.com:19302,stun:stun.antisip.com:3478,stun:stun.bluesip.net:3478,stun:stun.dus.net:3478,stun:stun.epygi.com:3478,stun:stun.sonetel.net:3478,stun:stun.uls.co.za:3478,stun:stun.voipgate.com:3478,stun:stun.voys.nl:3478 utls-imitate=hellorandomizedalpn"
          #];
        };
      };


      # Define a user account. Don't forget to set a password with ‘passwd’.
      users.users.f_lynx = {
        isNormalUser = true;
        description = "Alex A. Naanou";
        extraGroups = [ "networkmanager" "wheel" ];
        packages = with pkgs; [
        ];
      };
      environment.localBinInPath = true;

      environment.variables.EDITOR = "vim";


      # List packages installed in system profile. To search, run:
      # $ nix search wget
      environment.systemPackages = with pkgs; [
        usbutils udiskie udisks
        exfat exfatprogs
        # XXX 20250614: does not build on 25.05
        #scrounge-ntfs

        vim-full
        #micro
        vifm mc far2l nnn 
        #ranger
        dos2unix

        psmisc
        #tdrop
        tmux
        tree
        btop htop iotop iftop
        ncdu du-dust

        # mostly needed for debugging...
        #libinput

        tlp acpi

        gparted
        #gdisk
        testdisk
        jdupes fdupes

        wget
        tor
        syncthingtray
        #shadowsocks-rust
        #shadowsocks-v2ray-plugin
        ungoogled-chromium
        #tor-browser

        zip unzip
        tldr
        bat

        # fonts...
        terminus_font 

        # GUI
        keepassxc
        ulauncher
        kitty #ghostty
        #logseq
        # XXX this does not work on default gnome...
        wl-gammactl
        nextcloud-client

        # dev
        gitFull
        gnumake
        nodejs
        electron
        go
        python3
        #python311Packages.pygobject3
        #sbcl

        # Gnome stuff...
        gnome-tweaks
        dconf-editor
        gnome-remote-desktop
        gnomeExtensions.advanced-alttab-window-switcher
        gnomeExtensions.search-light
        gnomeExtensions.quick-settings-tweaker
        #gnomeExtensions.quake-mode
        gnomeExtensions.quake-terminal
        gnomeExtensions.gsconnect
        gnomeExtensions.dash-to-panel
        gnomeExtensions.blur-my-shell
        gnomeExtensions.unmess
        gnomeExtensions.custom-accent-colors
        #gnomeExtensions.tray-icons-reloaded
        gnomeExtensions.appindicator
        gnomeExtensions.customize-ibus
        gnomeExtensions.date-menu-formatter
        gnomeExtensions.lock-keys
        gnomeExtensions.clipboard-indicator
        gnomeExtensions.hibernate-status-button
        gnomeExtensions.caffeine
        gnomeExtensions.grand-theft-focus
        # XXX seems to be out of date for Gnome 46...
        gnomeExtensions.guillotine
        # XXX this seems to be missing...
        #   see: https://github.com/AstraExt/astra-monitor
        #gnomeExtensions.astra-monitor

        gnome-firmware-updater
        gedit

        # media...
        vlc mpv cmus
        yt-dlp media-downloader
        ffmpeg #ffmpegthumbnailer
        httrack

      ];

      programs.geary.enable = false;

      #programs.git.enable = true;
      programs.dconf.enable = true;
      programs.firefox.enable = true;

      # XXX not sure who wants electron...
      nixpkgs.config.permittedInsecurePackages = [
        "electron-25.9.0"
      ];


      # Some programs need SUID wrappers, can be configured further or are
      # started in user sessions.
      # programs.mtr.enable = true;
      # programs.gnupg.agent = {
      #   enable = true;
      #   enableSSHSupport = true;
      # };

      # ulauncher... 
      # XXX can't get ulauncher to be centered and focus on launch...
      #systemd.user.services.ulauncher = {
      #  enable = true;
      #  description = "Start Ulauncher";
      #  script = ''
      #    ${pkgs.coreutils-full}/bin/sleep 2
      #    ${pkgs.ulauncher}/bin/ulauncher --hide-window
      #  '';

      #  documentation = [ "https://github.com/Ulauncher/Ulauncher/blob/f0905b9a9cabb342f9c29d0e9efd3ba4d0fa456e/contrib/systemd/ulauncher.service" ];
      #  # XXX this does not work for some reason...
      #  #wantedBy = [ "graphical.target" ];
      #  wantedBy = [ "graphical-session.target" ];
      #  after = [ "display-manager.service" ];
      #};


      # Open ports in the firewall.
      # networking.firewall.allowedTCPPorts = [ ... ];
      # networking.firewall.allowedUDPPorts = [ ... ];
      # Or disable the firewall altogether.
      # networking.firewall.enable = false;


      # This value determines the NixOS release from which the default
      # settings for stateful data, like file locations and database versions
      # on your system were taken. It‘s perfectly fine and recommended to leave
      # this value at the release version of the first install of this system.
      # Before changing this value read the documentation for this option
      # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
      system.stateVersion = "23.05"; # Did you read the comment?
    }


    # Full config...
    (lib.mkIf (builtins.getEnv "NIX_LIGHTWEIGHT" == "") {
      environment.systemPackages = with pkgs; [

        # LaTeX
        #texlive.combined.scheme-full 
        (texlive.combine {
          inherit (texlive) scheme-medium
          # missing:
          #   calc graphicx ifthen pgffor rotating trimclip xinttools 
          kvoptions xargs ifthenx iftex xint listofitems xkeyval
          etoolbox changepage pdfcomment eso-pic environ numprint xcolor
          pagecolor colorspace graphics adjustbox textpos fancyvrb flowfram
          fancyhdr pdfpages geometry 
          anyfontsize cprotect ccicons 
          # XXX this seems to be missing...
          #suffix 
          lipsum 
          hardwrap catchfile 
          # photobook...
          photobook
          # doc...
          titlesec hypdoc doctools needspace xstring listings imakeidx  
          latexmk;
          #(setq org-latex-compiler "lualatex")
          #(setq org-preview-latex-default-process 'dvisvgm)
        })

        # fonts...
        #nerdfonts

        #blender
        #krita
        #gimp3
        gimp3-with-plugins

      ];

      # Nerd Fonts...
      fonts.packages = [
        pkgs.nerd-fonts.droid-sans-mono
      ];
      #fonts.packages = [ ... ] ++ builtins.filter lib.attrsets.isDerivation (builtins.attrValues pkgs.nerd-fonts);
      # all nerd fonts (~8G)...
      #fonts.packages = builtins.filter lib.attrsets.isDerivation (builtins.attrValues pkgs.nerd-fonts);

    }) 
  ];
}