# TFTP boot with shared image
# Requests store path to install from master
# Runs disko and nixos-install

{ pkgs, lib, config, nodes, ... }@args:

with lib;

let
  targets = {
    "50:46:5d:da:0b:d6" = "node-00";
    "50:46:5d:da:0c:56" = "node-01";
    "10:bf:48:1f:a6:8f" = "node-02";
    "10:bf:48:1b:57:47" = "node-03";
    "10:bf:48:19:a2:4d" = "node-04";
    "10:bf:48:1b:56:df" = "node-05";
    "50:46:5d:da:0c:52" = "node-06";
  };

  installer = pkgs.nixos [
    ./installer.nix
    {
      _module.args = {
        nodes = getAttrs [ "manager" ] nodes;
      };
    }
  ];

  apiEntry = name:
    let
      node = nodes.${name}.config.system.build;
      boot = installer.config.system.build;

      install = pkgs.writeScript "install-${name}" ''
        #!/usr/bin/env bash

        set -xeuo pipefail

        "${node.diskoScript}"

        "${node.nixos-install}/bin/nixos-install" \
          --root /mnt \
          --system "${node.toplevel}" \
          --no-channel-copy \
          --no-root-password \
          --verbose

        reboot
      '';
    in
    pkgs.writeText "pixieboot-api-${name}" (builtins.toJSON {
      kernel = "file://${boot.kernel}/bzImage";
      initrd = [ "file://${boot.netbootRamdisk}/initrd" ];
      cmdline = concatStringsSep " " [
        "init=${boot.toplevel}/init"
        "loglevel=4"
        "nixos.install=${install}"
      ];
      message = "NixOS Automatic Installer for ${name}";
    });

  api = pkgs.linkFarm "pixiecore-api" (mapAttrs'
    (mac: name: nameValuePair "pixiecore/v1/boot/${mac}" (apiEntry name))
    targets);
in
{
  services.pixiecore = {
    enable = true;
    mode = "api";
    dhcpNoBind = true;
    debug = true;
    openFirewall = true;
    port = 5080;
    statusPort = 6080;
    apiServer = "http://boot.${config.networking.domain}/pixiecore";
  };

  services.nginx = {
    virtualHosts = {
      "boot.${config.networking.domain}" = {
        locations."/".proxyPass = "http://localhost:${toString config.services.pixiecore.port}";
        locations."/status".proxyPass = "http://localhost:${toString config.services.pixiecore.statusPort}";
        locations."/pixiecore".root = api;
      };
    };
  };

  services.dhcpd4 = {
    enable = true;
    interfaces = [ "enp11s0f0" ];

    extraConfig = ''
      option domain-name-servers 10.0.0.53, 10.1.1.10;
      option domain-name "${config.networking.domain}";

      subnet 10.32.47.0 netmask 255.255.255.0 {
        interface enp11s0f0;
        range 10.32.47.200 10.32.47.230;

        option routers 10.32.47.1;
      }
    '';
  };

  hpc.hostFile.aliases = [
    "boot.${config.networking.domain}"
  ];
}