{ nixpkgs, nixos-hardware, ... }:
{ config, pkgs, ... }:
{
  imports = [
    "${nixpkgs}/nixos/modules/installer/sd-card/sd-image-aarch64.nix"

    nixos-hardware.nixosModules.raspberry-pi-4

    ../../users/root
    ../../users/erwin
  ];

  eboskma = {
    users.erwin.enable = true;
    base.kernel = pkgs.linuxPackages_rpi4;
    networking.enable = true;
    nix-common.enable = true;
    systemd.enable = true;
  };

  hardware = {
    enableRedistributableFirmware = true;
    raspberry-pi."4" = {
      fkms-3d.enable = true;
      audio.enable = true;
    };
  };

  networking = {
    hostName = "regin";
    useDHCP = false;
    useNetworkd = true;
  };

  systemd.network = {
    enable = true;

    networks = {
      "40-eth0" = {
        DHCP = "yes";
      };
    };
  };

  services.openssh.enable = true;

  ### 3D printer config
  # TODO: split to modules

  ### Klipper
  services.klipper = {
    enable = true;
    firmwares = {
      mcu = {
        enable = true;
        configFile = ./firmware-config;
        serial = "/dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A600KWST-if00-port0";
      };
    };

    settings = {
      stepper_x = {
        step_pin = "PA3";
        dir_pin = "!PA1";
        enabe_pin = "!PA5";
        rotation_distance = 40;
        microsteps = 16;
        endstop_pin = "^PA0";
        position_min = -10;
        position_endstop = -10;
        position_max = 195;
        homing_speed = 50;
        homing_retract_dist = 5;
      };
      stepper_y = {
        step_pin = "PC6";
        dir_pin = "!PC4";
        enabe_pin = "!PA7";
        rotation_distance = 40;
        microsteps = 16;
        endstop_pin = "^PA4";
        position_min = 0;
        position_endstop = 0;
        position_max = 200;
        homing_speed = 50;
        homing_retract_dist = 5;
      };
      stepper_z = {
        step_pin = "PC0";
        dir_pin = "PG2";
        enabe_pin = "!PC2";
        rotation_distance = 2;
        microsteps = 16;
        endstop_pin = "^PC7";
        position_min = 0;
        position_endstop = 0;
        position_max = 180;
        homing_speed = 5;
        homing_retract_dist = 5;
      };

      extruder = {
        step_pin = "PL6";
        dir_pin = "!PL4";
        enable_pin = "!PG0";
        rotation_distance = 34.043;
        microsteps = 16;
        nozzle_diameter = 0.400;
        filament_diameter = 1.75;
        max_extrude_only_distance = 150;
        heater_pin = "PE4";
        sensor_type = "EPCOS 100K B57560G104F";
        sensor_pin = "PK0";
        control = "pid";
        pid_Kp = 12.33;
        pid_Ki = 0.51;
        pid_Kd = 74.50;
        min_temp = 0;
        max_temp = 250;
        max_extrude_cross_section = 5;
      };

      heater_bed = {
        heater_pin = "PG5";
        sensor_type = "ATC Semitec 104GT-2";
        sensor_pin = "PK2";
        control = "pid";
        pid_Kp = 234.88;
        pid_Ki = 42.79;
        pid_Kd = 322.28;
        min_temp = 0;
        max_temp = 120;
      };

      bed_screws = {
        screw1 = "20,7";
        screw2 = "190,7";
        screw3 = "190,180";
        screw4 = "20,180";
      };

      fan.pin = "PH4";

      mcu.serial = config.services.klipper.firmwares.mcu.serial;

      printer = {
        kinematics = "cartesian";
        max_velocity = 400;
        max_accel = 5000;
        max_z_velocity = 5;
        max_z_accel = 75;
      };

      display = {
        lcd_type = "hd44780";
        rs_pin = "PD1";
        e_pin = "PH0";
        d4_pin = "PH1";
        d5_pin = "PD0";
        d6_pin = "PE3";
        d7_pin = "PH3";
        encoder_pins = "PL7,PG1";
        click_pin = "^!PD2";
      };

      # These are necessary for Fluidd
      virtual_sdcard = {
        path = "/var/lib/klipper/gcode_files";
      };

      display_status = { };

      pause_resume = { };
    } // (import ./klipper-macros.nix);
  };

  services.moonraker = {
    enable = true;
    allowSystemControl = true;
    settings = {
      authorization = {
        cors_domains = [
          "*.local"
          "*://app.fluidd.xyz"
        ];

        trusted_clients = [
          "10.0.0.0/24"
          "10.1.0.0/24"
          "127.0.0.0/8"
          "fe80::/10"
          "::1/128"
        ];
      };

      history = { };

      octoprint_compat = {
        enable_ufp = false;
      };

      zeroconf = { };
    };
  };

  services.fluidd = {
    enable = true;
    hostName = config.networking.hostName;
  };

  ### END 3D printer config

  security = {
    polkit.enable = true;
  };
  environment.systemPackages = with pkgs; [
    raspberrypi-eeprom
  ];

  system.stateVersion = "23.05";
}