{ config, lib, pkgs, ... }:

let
  octoprintPort = 8080;
in
{
  imports = [
    ./hardware-configuration.nix
  ];

  c3d2 = {
    isInHq = true;
    mergeHostsFile = true;
    hq.interface = "eth0";
    hq.statistics.enable = true;
    k-ot.enable = true;
    audioServer.enable = true;
  };

  boot = {
    loader = {
      grub.enable = false;
      raspberryPi = {
        enable = true;
        version = 3;
        uboot.enable = true;
      };
    };
    kernelPackages = pkgs.linuxPackages_latest;
    # No ZFS on latest kernel:
    supportedFilesystems = lib.mkForce [ "vfat" "ext4" ];
    kernelParams = [ "console=tty0" ];
    tmpOnTmpfs = true;
  };

  hardware.deviceTree = {
    enable = true;
    kernelPackage = config.boot.kernelPackages.kernel;
  };

  nixpkgs.config.packageOverrides = pkgs: {
    makeModulesClosure = x:
      # prevent kernel install fail due to missing modules
      pkgs.makeModulesClosure (x // { allowMissing = true; });
  };

  nix = {
    buildCores = 4;
    maxJobs = 2;
  };

  networking = {
    hostName = "pulsebert"; # Define your hostname.

    # The global useDHCP flag is deprecated, therefore explicitly set to false here.
    # Per-interface useDHCP will be mandatory in the future, so this generated config
    # replicates the default behaviour.
    useDHCP = false;
    interfaces.eth0.useDHCP = true;
    interfaces.wlan0.useDHCP = true;
    firewall.enable = false;
  };

  environment.systemPackages = with pkgs; [
    libraspberrypi
    mpd
    mpv
    ncmpcpp
    ncpamixer
    pulseaudio # required for pactl
  ];

  programs.tmux.enable = true;

  security.sudo = {
    enable = true;
    wheelNeedsPassword = false;
  };

  # quirk for this pi3
  systemd.services.bluetooth.serviceConfig = {
    Restart = "always";
    RestartSec = "1s";
  };

  users.users = {
    # Allow access to printer serial port and GPIO
    "${config.services.octoprint.user}".extraGroups = [ "dialout" ];
    # Allow gpio group to access GPIO devices
    gpio = {
      isNormalUser = true;
      group = "gpio";
    };
  };

  services = {
    # Do not log to flash:
    journald.extraConfig = ''
      Storage=volatile
    '';

    openssh = {
      enable = true;
    };

    mjpg-streamer = {
      enable = true;
      inputPlugin = "input_uvc.so -d /dev/v4l/by-id/usb-046d_0817_4B7115A0-video-index0 -r 640x480 -f 30 -pl 50hz -ex auto";
      outputPlugin = "output_http.so -p 3020";
    };

    nginx = {
      enable = true;
      virtualHosts = {
        "drkkr.hq.c3d2.de" = {
          default = true;
          enableACME = true;
          forceSSL = true;
          locations."/" = {
            proxyPass = "http://127.0.0.1:${toString octoprintPort}";
            proxyWebsockets = true;
            extraConfig = ''
              proxy_set_header X-Scheme $scheme;
              proxy_set_header Accept-Encoding identity;
              client_max_body_size 2000M;
            '';
          };
          locations."/cam/stream" = {
            proxyPass = "http://localhost:3020/?action=stream";
            extraConfig = "proxy_pass_request_headers off;";
          };
          locations."/cam/capture" = {
            proxyPass = "http://localhost:3020/?action=snapshot";
            extraConfig = "proxy_pass_request_headers off;";
          };
        };
      };
    };

    octoprint = rec {
      enable = true;
      port = octoprintPort;
      extraConfig.webcam = {
        snapshot = "http://localhost:3020?action=snapshot";
        stream = "https://drkkr.hq.c3d2.de/cam/stream";
      };
      # plugins = let
      #   python = pkgs.octoprint.python;

      #   octoprint-filament-sensor-universal = python.pkgs.buildPythonPackage rec {
      #     pname = "OctoPrint-Filament-Sensor-Universal";
      #     version = "1.0.0";

      #     src = pkgs.fetchFromGitHub {
      #       owner = "lopsided98";
      #       repo = pname;
      #       rev = "8a72696867a9a008c5a79b49a9b029a4fc426720";
      #       sha256 = "1a7lzmjbwx47qhrkjp3hggiwnx172x4axcz0labm9by17zxlsimr";
      #     };

      #     propagatedBuildInputs = [ pkgs.octoprint python.pkgs.libgpiod ];
      #   };
      # #in p: [ octoprint-filament-sensor-universal ];
      # in p: [];
    };

    udev.extraRules = ''
      KERNEL=="gpiochip*", GROUP="gpio", MODE="0660"
    '';
  };

  system.stateVersion = "21.05"; # Did you read the comment?
}