#
# 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

        exiftool vips
      ];

      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 varwidth hyphenat bigfoot lipsum 
          anyfontsize cprotect ccicons multitoc hardwrap catchfile 
          titlesec hypdoc doctools needspace xstring listings imakeidx  
          latexmk;
          pax

          # fonts...
          opensans courier

          # languages...
          russ babel-russian hyphen-russian
          
          # photobook...
          photobook
          
          #(setq org-latex-compiler "lualatex")
          #(setq org-preview-latex-default-process 'dvisvgm)
        })

        # jdk - required by texlive-pax (BUG: no dependency??)
        temurin-jre-bin

        # 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);

    }) 
  ];
}