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{ pkgs, ... }:
let
  forwardedPort = 19000;
  internalPort = 9000;
in
{
  name = "webhook";

  nodes = {
    webhookMachine =
      { pkgs, ... }:
      {
        virtualisation.forwardPorts = [
          {
            host.port = forwardedPort;
            guest.port = internalPort;
          }
        ];
        services.webhook = {
          enable = true;
          port = internalPort;
          openFirewall = true;
          hooks = {
            echo = {
              execute-command = "echo";
              response-message = "Webhook is reachable!";
            };
          };
          hooksTemplated = {
            echoTemplate = ''
              {
                "id": "echo-template",
                "execute-command": "echo",
                "response-message": "{{ getenv "WEBHOOK_MESSAGE" }}"
              }
            '';
          };
          environment.WEBHOOK_MESSAGE = "Templates are working!";
        };
      };
  };

  extraPythonPackages = p: [
    p.requests
    p.types-requests
  ];

  testScript =
    { nodes, ... }:
    ''
      import requests
      webhookMachine.wait_for_unit("webhook")
      webhookMachine.wait_for_open_port(${toString internalPort})

      with subtest("Check that webhooks can be called externally"):
        response = requests.get("http://localhost:${toString forwardedPort}/hooks/echo")
        print(f"Response code: {response.status_code}")
        print("Response: %r" % response.content)

        assert response.status_code == 200
        assert response.content == b"Webhook is reachable!"

      with subtest("Check that templated webhooks can be called externally"):
        response = requests.get("http://localhost:${toString forwardedPort}/hooks/echo-template")
        print(f"Response code: {response.status_code}")
        print("Response: %r" % response.content)

        assert response.status_code == 200
        assert response.content == b"Templates are working!"
    '';
}