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{ config, lib, pkgs, ... }:
let
  certs = config.security.acme.certs.${domain};
  domain = "loang.net";
  bindUserDirs = sources: target: lib.mapAttrs' (user: dir: {
    name = "${target}/~${user}";
    value = {
      device = "${config.users.users.${user}.home}/${dir}";
      options = [ "bind" ];
    };
  }) sources;
in {
  environment = {
    enableAllTerminfo = true;
    systemPackages = with pkgs; [ git rsync vim ];
  };

  fileSystems = bindUserDirs {
    cnx = "www";
  } config.services.nginx.virtualHosts.${domain}.root;

  imports = [ ./vpsadminos.nix ];

  networking = {
    domain = domain;

    firewall = {
      allowedTCPPorts = [
        80 # HTTP
        443 # TLS
        1965 # Gemini
        2211 # SSH
        4001 # IPFS
      ];
      allowedUDPPorts = [
        4001 # IPFS
      ];
    };

    hostName = "brno";
  };

  security = {
    acme = {
      acceptTerms = true;
      certs.${domain} = {
        credentialsFile = pkgs.writeText "namesilo.env" ''
          NAMESILO_API_KEY_FILE=/var/lib/acme/namesilo.key
          NAMESILO_PROPAGATION_TIMEOUT=1800
        '';
        dnsProvider = "namesilo";
        extraDomainNames = [
          "*.ipfs.${domain}"
          "*.ipns.${domain}"
        ];
        webroot = null;
      };
      defaults.email = "mcsinyx@disroot.org";
    };

    sudo = {
      enable = true;
      execWheelOnly = true;
      wheelNeedsPassword = false;
    };
  };

  services = {
    ipfs = {
      enable = true;
      enableGC = true;
      extraConfig.GateWay = {
        NoFetch = true;
        PublicGateways.${domain} = {
          Paths =  [ "/ipfs" "/ipns" ];
          UseSubdomains = true;
        };
      };
    };

    molly-brown = let
      certDir = certs.directory;
    in {
      certPath = "${certDir}/cert.pem";
      docBase = "/var/lib/gemini/${domain}";
      enable = true;
      hostName = domain;
      keyPath = "${certDir}/key.pem";
    };

    nginx = let
      ipfsGateway = "http://localhost:8080";
      ipfsProxy = {
        forceSSL = true;
        locations."/".proxyPass = ipfsGateway;
        useACMEHost = domain;
      };
    in {
      enable = true;
      recommendedProxySettings = true;
      virtualHosts = {
        "${domain}" = {
          enableACME = true;
          forceSSL = true;
          locations = {
            "/ipfs".proxyPass = ipfsGateway;
            "/ipns".proxyPass = ipfsGateway;
          };
          root = "/var/lib/www/${domain}";
        };
        "*.ipfs.${domain}" = ipfsProxy;
        "*.ipns.${domain}" = ipfsProxy;
      };
    };

    openssh = {
      enable = true;
      passwordAuthentication = false;
      ports = [ 2211 ];
    };
  };

  system.stateVersion = "22.05";

  systemd = {
    extraConfig = ''
      DefaultTimeoutStartSec=900s
    '';
    services.molly-brown.serviceConfig.SupplementaryGroups = [ certs.group ];
  };

  time.timeZone = "UTC";

  users.users = {
    ckie = {
      isNormalUser = true;
      openssh.authorizedKeys.keyFiles = [ "/etc/ssh/ckie.pub" ];
    };

    cnx = {
      extraGroups = [ "wheel" ];
      isNormalUser = true;
      openssh.authorizedKeys.keyFiles = [ "/etc/ssh/cnx.pub" ];
      packages = with pkgs; [ stow ];
    };

    owocean = {
      isNormalUser = true;
      openssh.authorizedKeys.keyFiles = [ "/etc/ssh/owocean.pub" ];
    };

    xarvos = {
      isNormalUser = true;
      openssh.authorizedKeys.keyFiles = [ "/etc/ssh/xarvos.pub" ];
    };
  };
}