{ config, pkgs, ... }:

let
  lowBatteryNotifier = pkgs.writeScript "lowBatteryNotifier"
    ''
      DISPLAY=:0.0
      BAT=`${pkgs.acpi}/bin/acpi -b | ${pkgs.gnugrep}/bin/grep -P -o '[0-9]+(?=%)'`
      STAT=`${pkgs.acpi}/bin/acpi -b | ${pkgs.gnugrep}/bin/grep -P -o '\S+(harging)'`
      test $STAT = "Discharging" -a $BAT -le 15 -a $BAT -gt 7 && DISPLAY=:0.0 ${pkgs.libnotify}/bin/notify-send 'Low Battery'
      test $STAT = "Discharging" -a $BAT -le 7 && DISPLAY=:0.0 ${pkgs.libnotify}/bin/notify-send 'OMG I am dying'
    '';
in
{
  imports =
    [
      ./hardware-configuration.nix # Include the results of the hardware scan.
      ./packages.nix               # more environment.systemPackages
    ];

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

  networking.hostName = "ckopo-nix";
  networking.wireless = {
    enable = true;
    userControlled.enable = true;
    userControlled.group = "wheel";
    networks = {
      # not important and sensitive
    };
  };

  networking.extraHosts = ''
    127.0.0.1 localhost
  '';

  networking.firewall = {
    enable = true;
    allowedTCPPorts = [ 22 80 8055 8082 8080 24000 26000 ];
    allowedUDPPorts = [ 26000 ];
  };

  i18n = {
    consoleFont = "ruscii-8x16";
    # consoleKeyMap = "us";
    defaultLocale = "ru_RU.UTF-8";
  };

  time.timeZone = "Asia/Irkutsk";

  powerManagement.enable = true;

  # hardware.pulseaudio.enable = true;
  # hardware.pulseaudio.support32Bit = true;

  # hardware.bluetooth = {
  #   enable = true;
  #   powerOnBoot = false;
  # };

  hardware.opengl = {
    driSupport = true;
    driSupport32Bit = true;
  };

  # VirtualBox with Extension Pack
  virtualisation.virtualbox.host.enable = true;
  nixpkgs.config.virtualbox.enableExtensionPack = true;

  # Moar packages!
  nixpkgs.config.allowUnfree = true;

  # List packages installed in system profile. To search by name, run:
  # $ nix-env -qaP | grep wget
  environment = {

    systemPackages = with pkgs; [
      nox

      # wicd
      # networkmanager
      # networkmanagerapplet

      # acpi pciutils
      acpi gnugrep
      zip unzip

      wget mc
      w3m tmux byobu

      git gnumake
      # emacs # let's leave them both for this moment
      mdp

      vim xkb_switch vimPlugins.vim-xkbswitch

      gcc binutils
      zlib zlibStatic cmark # temp slibs

      python36Full
      jetbrains.pycharm-professional
      jetbrains.idea-ultimate

      aalib
      # android-studio
      acpi
      atom love
      bind
      blender
      cabal-install cabal2nix
      cmatrix
      codeblocks
      ctodo
      desmume
      dropbox
      # elm #
      # emem # Markdown to HTML
      file # file types
      freeglut
      freetype
      mesa_glu
      gnome3.gnome_terminal
      # gnum4 # m4 macro processor
      # guitarix
      gutenprint # ?
      gxmessage
      gzdoom
      # <> haxe
      # hedgewars
      # ies2-bus-arbiter
      imv
      # inotify-tools
      # ioquake3
      libcdio
      libnotify
      xorg.libSM
      lm_sensors
      mtools
      # mesa_noglu
      # mysql-workbench
      # netbeans
      netbeans
      # <> nexuiz
      # nix-repl
      nmap
      nodejs
      p7zip
      patchelf
      pciutils
      # pidgin
      psmisc
      pv
      # pypi2nix
      # python2nix
      python36Packages.tkinter
      python36Packages.numpy # matplotlib Pillow pip
      python36Packages.pyqt5 # requests setuptools sympy
      qtcreator
      # steam
      # screen
      sqlite
      sshpass
      sysstat
      system-config-printer
      tcpdump
      traceroute
      translate-shell
      unar
      usbutils
      xfce.xfce4notifyd
      # xfontsel
      xlsfonts
      xsel
      zlib

      ghc stack

      mesa_drivers mesa_glu
      xorg_sys_opengl glmark2

      # love # is user-space installed by now
      # busybox

      gksu
      scrot

      # moc
      # xdotool xlaunch
      # stalonetray xclip volumeicon

      libreoffice # do not ask
      vlc firefox gimp

      # haskellPackages.hmenu
      # haskellPackages.yeganesh
      # haskellPackages.xmobar

      # i3status
      python36Packages.i3-py
      # python35Packages.i3ipc
      # gnome2.zenity
      xorg.xmessage
      xorg.xbacklight
      # mpc_cli mpd ncmpcpp
      bar-xft conky
      dmenu

      # xfce
      # gtk                  # To get GTK+'s themes
      # gnome.gnomeicontheme # more icons
      hicolor_icon_theme     # icons for thunar
      shared_mime_info

      xorg.xsetroot nitrogen # wallpapers
      # lxappearance gtk-engine-murrine
      # gtk_engines

      gnome2.gnome_icon_theme
      desktop_file_utils
      xfce.garcon
      xfce.thunar_volman
      xfce.gvfs
      xfce.xfce4_appfinder

      xfce.exo
      xfce.gtk_xfce_engine
      xfce.gvfs            # auto mounting
      xfce.libxfce4ui
      xfce.libxfcegui4
      # xfce.thunar          # file manager
      # xfce.thunar_volman   # auto mounting
      # xfce.xfceutils       # this should be deleted
      xfce.xfce4icontheme  # for thunar
      xfce.xfce4settings
      xfce.xfconf
      xfce.mousepad
      xfce.terminal

      # zathura              # pdf viewer
    ];

    shellAliases = {
      # g = "git";
      # gl = "git log --pretty=format:\"%an, %ar, %h: %s\"";
      # gs = "git status";
      # gf = "git fetch";
      # ga = "git add";
      # gcl = "git clone";
      # gc = "git commit -m";
      # gca = "git commit -a -m";
      # gm = "git merge";
      # gb = "git branch";
      # gco = "git checkout";
      # gd = "git diff";
      gp = "git pull --rebase && git push";
      gull = "git pull --rebase";
      gpp = "git pull --rebase git push";
      gush = "git push";
      gu = "git ls-files --other --exclude-standard";
      gt = "git log --graph --oneline --decorate --all";

      nixos-fix = "nix-store --verify --check-contents --repair";
      nixos-repkg = "nix-build --check -A";
      nixos-clean = "nix-collect-garbage -d";
      nixos-search = "nix-env -qaP --description \\* | sed -re \"s/^nixos\\.//g\" | fgrep -i";
      nixos-update = "nixos-rebuild switch";
      nixos-upgrade = "nixos-rebuild switch --upgrade";
      nxf = "nixos-fix";
      nxr = "nixos-repkg";
      nxc = "nixos-clean";
      nxs = "nixos-search";
      nxu = "nixos-update";
      nxg = "nixos-upgrade"; # TODO: sync git in /etc/nixos/* from imports

      nxedit = "vim -p /etc/nixos/packages.nix /etc/nixos/configuration.nix";
      # nxedit = "vim /etc/nixos/configuration.nix";

      pff = "poweroff";
      stb = "stack --nix build";
      stg = "stack --nix ghci";

      ".." = "cd ..";
      e = "$=EDITOR";
      d = "$=TILE_CMD";
      st = "$=TERM_CMD";
      cg = "grep --color=always";
      cgr = "cg -r";
      less = "less -R";
      timestamp = "date +%s -d";
      wtf-size = "du -ha -d1 | sort -h";
      my-ip = "curl ipecho.net/plain";

      shakal-1 = "nix-store --optimize";
      shakal-2 = "nix-env --delete-generations 2d";
      shakal-3 = "nix-collect-garbage --delete-older-than 2d";

      ies2-1 = "curl http://game.ies2/api/stage/prepare";
      ies2-2 = "curl http://game.ies2/api/stage/scripting";
      ies2-3 = "curl http://game.ies2/api/stage/start";
      ies2-s = "ssh game.ies2 -p 24000";
    };

  };

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

  # Cron.
  services.cron = {
    enable = true;
    mailto = "user";
    systemCronJobs = [
      # "30 23 * * * user DISPLAY=:0.0 ${pkgs.libnotify}/bin/notify-send 'Time to go to bed'"
      "* * * * *   user ${lowBatteryNotifier}"
      # "@weekly     root   nix-collect-garbage"
    ];
  };

  services.openssh = {
    enable = true;
    extraConfig = ''
      ClientAliveInterval 15
      X11Forwarding yes
      X11UseLocalHost no
    '';
    permitRootLogin = "no";
    ports = [ 22 ];
    passwordAuthentication = true;
  };

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

  # ANDROID DEBUG

  # Huawei
  # services.udev.extraRules = ''
  #   SUBSYSTEM=="usb", ATTRS{idVendor}=="12d1", MODE="0660", GROUP="plugdev"
  # '';

  # Acer Aspire sound device fix
  boot.extraModprobeConfig = ''
    options snd_hda_intel id=PCH,HDMI index=1,0
  '';

  # Less sudden poweroffs
  services.logind.extraConfig = ''
    HandleLidSwitch=suspend
    HandlePowerKey=ignore
  '';

  services.xserver = {
    enable = true;
    defaultDepth = 24;
    videoDriver = "intel";
    layout = "us, ru";
    xkbOptions = "compose:ralt, grp:ctrl_shift_toggle, grp_led:caps";
                  # grp:caps_toggle, grp_led:caps
    # libinput.enable = true;
    # libinput.disableWhileTyping = true;
    synaptics = { # yes, I would need that
      enable = true;
      twoFingerScroll = true;
      additionalOptions = ''
        MatchProduct "ETPS/2 Elantech Touchpad"
      '';
    };

    windowManager.i3.enable = true;
    # windowManager.xmonad = {
    #   enable = true;
    #   enableContribAndExtras = true;
    # };
    windowManager.default = "i3";

    # displayManager.lightdm.enable = true;
    displayManager = {
      slim = {
	      enable = true;
	      defaultUser = "user";
              theme = pkgs.fetchurl {
                url = "https://github.com/edwtjo/nixos-black-theme/archive/v1.0.tar.gz";
                sha256 = "13bm7k3p6k7yq47nba08bn48cfv536k4ipnwwp1q1l2ydlp85r9d";
              };
              # theme = pkgs.slimThemes.subway;
	      # TODO: download, hack and upload to db.tt
	      # theme = pkgs.fetchurl {
        #   url = "https://github.com/Hinidu/nixos-solarized-slim-theme/archive/master.zip";
        #   sha256 = "f0ef5ed9518f05b9c540a5dd7e21111a26e91d405f1292ad86b1fc8704733ca8";
        # };
      };
    };

    desktopManager.xterm.enable = false;

    # displayManager.kdm.enable = true;
    # desktopManager.kde4.enable = true;
  };

  fonts = {
    enableFontDir = true;
    enableGhostscriptFonts = true;
    fonts = with pkgs; [
      font-awesome-ttf
      fira
      fira-mono
      # nerdfonts
      # input-fonts
      terminus_font
      powerline-fonts
      (let input-fonts  = let version = "2017-01-23";
         in with pkgs; stdenv.mkDerivation rec {
           name = "input-fonts-${version}";
           src = pkgs.fetchurl {
             name = "Input-Font.zip";
             url = "http://input.fontbureau.com/build/?fontSelection=whole&a=0&g=ss&i=serif&l=serifs_round&zero=0&asterisk=0&braces=straight&preset=dejavu&line-height=1.2&accept=I+do&email=";
             sha256 = "15b1mw4pzck91k5msqfsc20syv5rl84di1ylbjdilnpxhq9ggz29";
           };
           nativeBuildInputs = [ unzip ];
           phases = [ "unpackPhase" "installPhase" ];
           sourceRoot = ".";
           installPhase = ''
             mkdir -p $out/share/fonts/truetype
             find Input_Fonts -name "*.ttf" -exec cp -a {} "$out"/share/fonts/truetype/ \;
             mkdir -p "$out"/share/doc
             cp -a *.txt "$out"/share/doc/
           '';

           meta = with stdenv.lib; {
             description = "Fonts for Code, from Font Bureau";
             homepage = http://input.fontbureau.com;
             license = licenses.unfree;
             maintainers = with maintainers; [ romildo ];
             platforms = platforms.all;
           };
      }; in input-fonts)
    ];
  };

  users.groups = {
    dialout = {
      members = [ "user" ];
    };
    vboxusers = {
      members = [ "user" ];
    };
  };

  users.users.user = {
    isNormalUser = true;
    uid = 1000;
    extraGroups = [ "wheel" "network" "dialout" "audio" "cdrom" ];
    shell = pkgs.bashInteractive; # Hey?
    # set password by passwd!
  };


  # Nixos Manual on tty8
  services.nixosManual.showManual = true;

  # This value determines the NixOS release with which your system is to be
  # compatible, in order to avoid breaking some software such as database
  # servers. You should change this only after NixOS release notes say you
  # should.
  # system.stateVersion = "17.09"; # Did you read the comment?
  system.stateVersion = "18.03"; # Did you read the comment?

  # a little workaround, which didn't work with chmod issue
  nix.readOnlyStore = false;
}