{ config, pkgs, ... }:

let
  trivmixService = opts: (pkgs.callPackage ./custom/trivmix-service.nix opts).out;
in {
  imports =
    [
      ./bragi-hw.nix
      ./customized/autofs.nix
      ./custom/zsh.nix
      ./users.nix
    ];

  boot.loader.grub.enable = true;
  boot.loader.grub.version = 2;
  boot.loader.grub.device = "/dev/sda";

  boot.loader.grub.extraConfig = "serial; terminal_output.serial";
  boot.kernelParams = [ "console=ttyS0,115200"
                      ];

  networking.hostName = "bragi";
  networking.hostId = "2af11085";
  networking.wireless.enable = true;

  nixpkgs.config.packageOverrides = pkgs:
    rec {
      customizedHaskellPackages = pkgs.recurseIntoAttrs (
        pkgs.haskellPackages.override {
          extension = self: super: let
            callPackage = pkgs.lib.callPackageWith ( pkgs // self );
          in {
            trivmix = callPackage ./custom/trivmix.nix {};
            filelock = callPackage ./custom/filelock.nix {};
          };
        }
      );
      trivmix = let trivmix = customizedHaskellPackages.trivmix; in
        pkgs.stdenv.mkDerivation {
          name = "trivmix-wrapper";
          nativeBuildInputs = [ pkgs.makeWrapper ];
          buildCommand = ''
            mkdir -p $out/bin
            makeWrapper ${trivmix}/bin/trivmix $out/bin/trivmix \
              --run "umask 0" \
              --set JACK_PROMISCUOUS_SERVER 1
          '';
        };
      jack2 = pkgs.callPackage ./customized/jack2.nix {};
      mpd = pkgs.callPackage ./customized/mpd.nix {
        gmeSupport = false;
        game-music-emu = null;
      };
      mpv = pkgs.stdenv.lib.overrideDerivation pkgs.mpv (oldAttrs: {
        buildInputs = oldAttrs.buildInputs ++ [pkgs.makeWrapper];
        postInstall = ''
          wrapProgram $out/bin/mpv \
            --set JACK_PROMISCUOUS_SERVER 1 \
            --run "umask 0"
        '';
      });
    };

  environment.systemPackages = with pkgs; [
    git
    mosh
    rsync
    tmux
    nfs-utils
    jack2
    trivmix
    zsh
  ];

  # List services that you want to enable:

  services.openssh = {
    enable = true;
  };

  services.fcron = {
    enable = true;
    systab = ''
      %weekly * * nix-collect-garbage --delete-older-than '7d'
    '';
  };

  services.autofs = {
    enable = true;
    autoMaster = let
      mapConf = pkgs.writeText "auto" ''
        odin -fstype=nfs,ro odin.asgard.yggdrasil:/srv/media
      '';
      in ''
        /media file:${mapConf}
      '';
  };

  systemd.services.jack = {
    wantedBy = [ "sound.target" ];
    serviceConfig = {
      Type = "simple";
      ExecStart = "${pkgs.jack2}/bin/jackd -d alsa -M -H -r 96000";
      User = "jack";
      Group = "audio";
    };
  };

  systemd.services."mpdmix0" = trivmixService { name = "mpdmix0"; connectOut = "system:playback_3"; group = "mpd"; };
  systemd.services."mpdmix1" = trivmixService { name = "mpdmix1"; connectOut = "system:playback_4"; group = "mpd"; };

  systemd.services."passmix0" = trivmixService { name = "passmix0"; connectOut = "system:playback_3"; connectIn = "system:capture_5"; group = "vali_out"; };
  systemd.services."passmix1" = trivmixService { name = "passmix1"; connectOut = "system:playback_4"; connectIn = "system:capture_6"; group = "vali_out"; };

  systemd.services."passmix2" = trivmixService { name = "passmix2"; connectOut = "system:playback_5"; connectIn = "system:capture_1"; group = "vali_in"; };
  systemd.services."passmix3" = trivmixService { name = "passmix3"; connectOut = "system:playback_6"; connectIn = "system:capture_1"; group = "vali_in"; };

  systemd.services."passmix4" = trivmixService { name = "passmix4"; connectOut = "system:playback_3"; connectIn = "system:capture_7"; group = "misc_out"; };
  systemd.services."passmix5" = trivmixService { name = "passmix5"; connectOut = "system:playback_4"; connectIn = "system:capture_8"; group = "misc_out"; };

  services.mpd = {
    enable = true;
    musicDirectory = "/media/odin/music";
    extraConfig = ''
      audio_output {
        name "JACK"
        type "jack"
        client_name "mpd"
        destination_ports "mpdmix0:in,mpdmix1:in"
      }
    '';
  };

  users.extraUsers.jack = {
    name = "jack";
    isSystemUser = true;
    group = "audio";
  };

  security.setuidPrograms = ["mount.nfs"];

  security.pam.loginLimits =
  [
    { domain = "@audio"; item = "memlock"; type = "-"; value = "unlimited"; }
    { domain = "@audio"; item = "rtprio"; type = "-"; value = "99"; }
    { domain = "@audio"; item = "nofile"; type = "soft"; value = "99999"; }
    { domain = "@audio"; item = "nofile"; type = "hard"; value = "99999"; }
  ];
  programs.bash.promptInit = ''
    PROMPT_COLOR="1;31m"
    return $UID && PROMPT_COLOR="1;32m"
    case "$TERM" in
      xterm*|rxvt*|kterm|aterm|gnome*) # Others can go here.
        PS1="\n\[\033[$PROMPT_COLOR\][\u@\h:\w]\\$\[\033[0m\] "
        if test "$TERM" = "xterm"; then
          PS1="\[\033]2;\h:\u:\w\007\]$PS1"
        fi
        ;;
      *)
        PS1="[\u@\h:\w]$ "
        ;;
    esac
  '';

  networking.interfaces = {
    "enp1s0" = {
      useDHCP = false;
      ipAddress = "10.141.4.1";
      prefixLength = 24;
    };
  };

  networking.nat = {
    enable = true;
    externalIP = "10.141.1.5";
    externalInterface = "wlp4s0";
    internalIPs = [ "10.141.4.0/24"
                  ];
    internalInterfaces = [ "enp1s0"
                         ];
  };

  networking.firewall = {
    enable = true;
    allowPing = true;
    allowedTCPPorts = [ 22
                      ];
    allowedUDPPortRanges = [ { from = 60000; to = 61000; } # mosh
                           ];
    extraCommands = ''
      iptables -t nat -A POSTROUTING -o wlp4s0 -j MASQUERADE
      iptables -A FORWARD -i wlp4s0 -o enp1s0 -m state --state RELATED,ESTABLISHED -j ACCPET
      iptables -A FORWARD -i enp1s0 -o wlp4s0 -j ACCEPT
    '';
  };

  services.dhcpd = {
    enable = true;
    interfaces = [ "enp1s0"
                 ];
    extraConfig = ''
      option subnet-mask 255.255.255.0;
      option domain-name-servers 10.141.1.1, 8.8.8.8, 8.8.4.4;
      option domain-name "bragisheimr.yggdrasil";
      option routers 10.141.4.1;
      subnet 10.141.4.0 netmask 255.255.255.0 {
        range 10.141.4.100 10.141.4.254;
      }

      group {
        use-host-decl-names on;

        host vali {
          hardware ethernet e0:cb:4e:f7:10:3d;
          fixed-address vali.bragisheimr.yggdrasil;
        }
      }
    '';
  };

  services.ntp = {
    enable = false;
  };

  services.chrony = {
    enable = true;
  };
}