{ config, pkgs, ... }:

{
  imports =
    [
      ./hardware-configuration.nix
      ../../configuration/proxmox-vm
    ];

  boot.loader.grub.enable = true;
  boot.loader.grub.version = 2;
  boot.loader.grub.device = "/dev/vda";
  
  boot.binfmt.emulatedSystems = [
    "armv6l-linux"
    "armv7l-linux"
    "aarch64-linux"
  ];

  networking.hostName = "hydra-1";

  networking.useDHCP = false;
  networking.interfaces.ens18.ipv6.addresses = [ { address = "2001:638:904:ffcb::a"; prefixLength = 64; } ];
  networking.interfaces.ens19.ipv4.addresses = [ { address = "192.168.10.36"; prefixLength = 24; } ];
  networking.defaultGateway6 = { address = "2001:638:904:ffcb::1"; interface = "ens18"; };
  networking.defaultGateway = { address = "192.168.10.1"; interface = "ens19"; };
  networking.nameservers = [ "2001:638:904:ffcc::3" "2001:638:904:ffcc::4" "141.24.40.3" "141.24.40.4" ];

  nix = {
    settings.allowed-uris = "http:// https://";
    distributedBuilds = true;
    buildMachines = [
      {
        hostName = "localhost";
        systems = [
          "x86_64-linux"
          "armv6l-linux"
          "armv7l-linux"
          "aarch64-linux"
        ];
      }
      {
        hostName = "hydra-2.net.clerie.de";
        sshUser = "root";
        systems = [
          "x86_64-linux"
          "armv6l-linux"
          "armv7l-linux"
          "aarch64-linux"
        ];
        sshKey = "/var/lib/hydra/id_ed25519";
        publicHostKey = "c3NoLWVkMjU1MTkgQUFBQUMzTnphQzFsWkRJMU5URTVBQUFBSURaRUQ5UU0rcWU3c0I2UjZhdHZQNldOYUkyc0Mybmg3VFRzRDZrZ1JwbnIgcm9vdEBoeWRyYS0yCg==";
      }
    ];
  };

  programs.ssh.knownHosts."hydra-1.net.clerie.de".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIE2xQBCsFBCwL9n4OP/bPngtNO1fy9kPw13Z/NDoba16 root@hydra-1";
  programs.ssh.knownHosts."hydra-2.net.clerie.de".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDZED9QM+qe7sB6R6atvP6WNaI2sC2nh7TTsD6kgRpnr root@hydra-2";

  services.openssh.settings = {
    PermitRootLogin = "yes";
  };

  users.extraUsers.root.openssh.authorizedKeys.keys = [
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMv8Lbca/CR4das3HJ2F/sQ9dA7kdGS1hSVTt5lX4diP root@hydra-1"
  ];

  services.hydra = {
    enable = true;
    port = 3001;
    hydraURL = "https://hydra.clerie.de";
    listenHost = "localhost";
    notificationSender = "noreply@hydra.clerie.de";
    useSubstitutes = true;
    extraConfig = ''
      binary_cache_public_uri = https://nix-cache.clerie.de
    '';
  };

  services.nix-serve = {
    enable = true;
    port = 5005;
    bindAddress = "127.0.0.1";
    secretKeyFile = config.age.secrets.nix-cache-key.path;
    # Workaround https://github.com/NixOS/nix/issues/7704#issuecomment-1409480909
    package = pkgs.nix-serve-ng.override {
      nix = pkgs.nixVersions.nix_2_12;
    };
  };

  services.nginx.enable = true;
  services.nginx.virtualHosts = {
    "hydra.clerie.de" = {
      enableACME = true;
      forceSSL = true;
      locations = {
        "/" = {
          proxyPass = "http://localhost:3001";
        };
      };
    };
    "nix-cache.clerie.de" = {
      enableACME = true;
      forceSSL = true;
      locations."= /" = {
        return = ''200 'Nix Cache by clerie\n\nPublic key:\n\n  nix-cache.clerie.de:bAt1GJTS9BOTcXFWj3nURrSlcjqikCev9yDvqArMP5g=\n\nNixOS Configuration:\n\n  nix.settings = {\n    substituters = [\n      "https://nix-cache.clerie.de"\n    ];\n    trusted-public-keys = [\n      "nix-cache.clerie.de:bAt1GJTS9BOTcXFWj3nURrSlcjqikCev9yDvqArMP5g="\n    ];\n  }\n\nTry:\n\n  nix build --substituters "https://nix-cache.clerie.de" \\\n  --trusted-public-keys "nix-cache.clerie.de:bAt1GJTS9BOTcXFWj3nURrSlcjqikCev9yDvqArMP5g=" \\\n  "git+https://git.clerie.de/clerie/fieldpoc.git#fieldpoc"\n\n.-*..*-.' '';
        extraConfig = ''
          types { } default_type "text/plain; charset=utf-8";
        '';
      };
      locations."/" = {
        proxyPass = "http://127.0.0.1:5005";
      };
    };
  };

  networking.firewall.allowedTCPPorts = [ 80 443 ];

  clerie.monitoring = {
    enable = true;
    id = "210";
    pubkey = "bA7b+vRlfvbGma74+Tz+FHGcRKPe+oAOfXmuqDR4+Sc=";
  };

  system.stateVersion = "22.11";
}