{ pkgs, lib, ... }:
let
  pkgs' = pkgs;

  testLib = pkgs.callPackage ../common.nix {};

  subdomain = "grafana";
  domain = "example.com";
  fqdn = "${subdomain}.${domain}";

  password = "securepw";

  commonTestScript = testLib.accessScript {
    inherit fqdn;
    hasSSL = { node, ... }: !(isNull node.config.shb.monitoring.ssl);
    waitForServices = { ... }: [
      "nginx.service"
    ];
    waitForPorts = { node, ... }: [
      node.config.shb.monitoring.grafanaPort
    ];
  };

  base = {
    imports = [
      (pkgs'.path + "/nixos/modules/profiles/headless.nix")
      (pkgs'.path + "/nixos/modules/profiles/qemu-guest.nix")
      {
        options = {
          shb.backup = lib.mkOption { type = lib.types.anything; };
        };
      }
      ../../modules/blocks/postgresql.nix
      ../../modules/blocks/monitoring.nix
    ];

    # Nginx port.
    networking.firewall.allowedTCPPorts = [ 80 443 ];
  };

  certs = { config, ... }: {
    imports = [
      ../../modules/blocks/ssl.nix
    ];

    shb.certs = {
      cas.selfsigned.myca = {
        name = "My CA";
      };
      certs.selfsigned = {
        n = {
          ca = config.shb.certs.cas.selfsigned.myca;
          domain = "*.${domain}";
          group = "nginx";
        };
      };
    };

    systemd.services.nginx.after = [ config.shb.certs.certs.selfsigned.n.systemdService ];
    systemd.services.nginx.requires = [ config.shb.certs.certs.selfsigned.n.systemdService ];
  };

  basic = { config, ... }: {
    shb.monitoring = {
      enable = true;
      inherit subdomain domain;
      grafanaPort = 3000;
      adminPasswordFile = pkgs.writeText "admin_password" password;
      secretKeyFile = pkgs.writeText "secret_key" "secret_key";
    };
  };

  https = { config, ...}: {
    shb.monitoring = {
      ssl = config.shb.certs.certs.selfsigned.n;
    };
  };
in
{
  basic = pkgs.testers.runNixOSTest {
    name = "monitoring-basic";

    nodes.server = lib.mkMerge [
      base
      basic
      {
        options = {
          shb.authelia = lib.mkOption { type = lib.types.anything; };
        };
      }
    ];

    nodes.client = {};

    testScript = commonTestScript;
  };

  https = pkgs.testers.runNixOSTest {
    name = "monitoring-https";

    nodes.server = lib.mkMerge [
      base
      certs
      basic
      https
      {
        options = {
          shb.authelia = lib.mkOption { type = lib.types.anything; };
        };
      }
    ];

    nodes.client = {};

    testScript = commonTestScript;
  };
}