{ config, pkgs, ... }: {

nix = {
  extraOptions = ''
    auto-optimise-store = true
  '';
  gc = {
    automatic = true;
    dates = "weekly";
    options = "--delete-older-than 30d";
  };
};

nixpkgs.config = {
  allowUnfree = false;
};

time.timeZone = "Europe/Paris";

i18n = { # internationalization
  consoleFont   = "Lat2-Terminus16";
  consoleKeyMap = "fr";
  defaultLocale = "fr_FR.UTF-8";
};

networking = {
  networkmanager = {
    enable = true;
  };
  firewall = {
    enable = true;
    allowedTCPPorts = [
      51413 # transmission-gtk
      4662 # edonkey
    ];
    allowedUDPPorts = [
      51413 # transmission-gtk
      4667 # edonkey
      4672 # edonkey
    ];
  };
};

sound.enable = true;
hardware.pulseaudio.enable = true;

environment = {
  variables = {
    EDITOR = "gvim";
    PAGER  = "less -R";
  }; 
  systemPackages = with pkgs; [
    acpi
    binutils
    coreutils
    cryptsetup
    curl
    direnv
    dstat
    e2fsprogs
    elementary-xfce-icon-theme
    file
    glib # gio
    gnome3.defaultIconTheme
    gnome3.file-roller
    gnome3.gnome-keyring 
    gnome3.seahorse
    gvfs
    gnumake
    gnupg
    gparted
    ffmpeg
    hicolor-icon-theme
    htop
    less
    libfaketime
    lsof
    man
    miniupnpc
    ncdu
    ncurses
    networkmanagerapplet
    ntfs3g
    #pasystray
    pavucontrol
    powertop
    procps
    python
    redshift
    sudo
    tig
    tmux
    tree
    utillinux
    wget
    which
    xdg_utils
    xfce.thunar-volman
  ];
};

programs = {
  bash = {
    interactiveShellInit = ''
      bind '"\e[A":history-search-backward'
      bind '"\e[B":history-search-forward'
      
      # Ignore duplicate commands, ignore commands starting with a space
      export HISTCONTROL=erasedups:ignorespace
      export HISTSIZE=42000
      # Append to the history instead of overwriting (good for multiple connections)
      shopt -s histappend
      fan () {
        if [ $# -gt 0 ]
        then sudo tee /proc/acpi/ibm/fan <<<"level $1"
        else grep '^\(level\|speed\):' /proc/acpi/ibm/fan
        fi
        acpi -t
      }
    '';
    shellAliases = {
      cl = "clear";
      l  = "ls -alh";
      ll = "ls -l";
      ls = "ls --color=tty";
  
      s="sudo systemctl";
      s-u="systemctl --user";
      
      nix-clean="sudo nix-collect-garbage -d";
      nix-catalog="sudo nix-channel --list";
      nix-history="sudo nix-env --list-generations --profile /nix/var/nix/profiles/system";
      nix-rollback="sudo nixos-rebuild switch --rollback";
      nix-update="sudo nix-channel --update";
      nix-upgrade="sudo nixos-rebuild switch";
      nix-upstream="sudo nix-channel --list";
      nix-config="gvim ~/.config/nixos/*.nix";
    };
  };

  dconf.enable = true;

  gnupg.agent = {
    enable = true;
    enableSSHSupport = true;
  };

  mtr.enable = true;
};

services = {
  avahi = {
    enable  = true;
    nssmdns = true;
  };

  dbus = {
    packages = [ pkgs.gnome3.dconf ];
  };

  gnome3 = {
    gvfs = {
      enable = true;
    };
  };

  physlock = {
    enable = true;
    allowAnyUser = true;
    # NOTE: xfconf-query -c xfce4-session -p /general/LockCommand -s "physlock" --create -t string
  };

  printing = {
    enable = true;
    drivers = [
      pkgs.gutenprint
    ];
  };

  xserver = {
    enable = true;
    layout = "fr";
    xkbOptions = "eurosign:e";
    libinput.enable = true;

    desktopManager = {
      default = "xfce";
      xfce = {
        enable = true;
        thunarPlugins = [
          pkgs.xfce.thunar-archive-plugin
        ];
      };
      xterm.enable = false;
    };

  };
};

# 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 = "19.09"; # Did you read the comment?
}