{
  pkgs,
  lib,
  self,
}:

pkgs.testers.runNixOSTest {
  name = "arr-init-multiple-clients";

  nodes.machine =
    { pkgs, lib, ... }:
    let
      mocks = import ./lib/mocks.nix { inherit pkgs; };
    in
    {
      imports = [ self.nixosModules.default ];

      system.stateVersion = "24.11";

      virtualisation.memorySize = 4096;

      environment.systemPackages = with pkgs; [
        curl
        jq
        gnugrep
      ];

      # Mock qBittorrent on port 6011
      systemd.services.mock-qbittorrent = mocks.mkMockQbittorrent {
        initialCategories = {
          tv = {
            name = "tv";
            savePath = "/downloads";
          };
        };
      };

      # Mock SABnzbd on port 6012
      systemd.services.mock-sabnzbd = mocks.mkMockSabnzbd { };

      systemd.tmpfiles.rules = [
        "d /media/tv 0755 sonarr sonarr -"
      ];

      services.sonarr = {
        enable = true;
        dataDir = "/var/lib/sonarr/.config/NzbDrone";
        settings.server.port = lib.mkDefault 8989;
      };

      # Sonarr with TWO download clients: qBittorrent + SABnzbd
      services.arrInit.sonarr = {
        enable = true;
        serviceName = "sonarr";
        dataDir = "/var/lib/sonarr/.config/NzbDrone";
        port = 8989;
        downloadClients = [
          {
            name = "qBittorrent";
            implementation = "QBittorrent";
            configContract = "QBittorrentSettings";
            protocol = "torrent";
            fields = {
              host = "127.0.0.1";
              port = 6011;
              useSsl = false;
              tvCategory = "tv";
            };
          }
          {
            name = "SABnzbd";
            implementation = "Sabnzbd";
            configContract = "SabnzbdSettings";
            protocol = "usenet";
            fields = {
              host = "127.0.0.1";
              port = 6012;
              useSsl = false;
              apiKey = "test-api-key";
              tvCategory = "tv";
            };
          }
        ];
        rootFolders = [ "/media/tv" ];
      };
    };

  testScript = ''
    start_all()

    # Wait for mock services
    machine.wait_for_unit("mock-qbittorrent.service")
    machine.wait_for_unit("mock-sabnzbd.service")
    machine.wait_until_succeeds("curl -sf http://localhost:6011/api/v2/app/version", timeout=30)

    # Wait for Sonarr
    machine.wait_for_unit("sonarr.service")
    machine.wait_until_succeeds(
        "API_KEY=$(grep -oP '(?<=<ApiKey>)[^<]+' /var/lib/sonarr/.config/NzbDrone/config.xml) && "
        "curl -sf http://localhost:8989/api/v3/system/status -H \"X-Api-Key: $API_KEY\"",
        timeout=120,
    )

    # Trigger init
    machine.succeed("systemctl restart sonarr-init.service")
    machine.wait_for_unit("sonarr-init.service")

    # Verify both download clients exist
    result = machine.succeed(
        "API_KEY=$(grep -oP '(?<=<ApiKey>)[^<]+' /var/lib/sonarr/.config/NzbDrone/config.xml) && "
        "curl -sf http://localhost:8989/api/v3/downloadclient -H \"X-Api-Key: $API_KEY\" | "
        "jq '. | length'"
    ).strip()
    assert result == "2", f"Expected 2 Sonarr download clients, got {result}"

    # Verify qBittorrent client
    machine.succeed(
        "API_KEY=$(grep -oP '(?<=<ApiKey>)[^<]+' /var/lib/sonarr/.config/NzbDrone/config.xml) && "
        "curl -sf http://localhost:8989/api/v3/downloadclient -H \"X-Api-Key: $API_KEY\" | "
        "jq -e '.[] | select(.name == \"qBittorrent\")'"
    )

    # Verify SABnzbd client
    machine.succeed(
        "API_KEY=$(grep -oP '(?<=<ApiKey>)[^<]+' /var/lib/sonarr/.config/NzbDrone/config.xml) && "
        "curl -sf http://localhost:8989/api/v3/downloadclient -H \"X-Api-Key: $API_KEY\" | "
        "jq -e '.[] | select(.name == \"SABnzbd\")'"
    )

    # Idempotency test: restart init and verify still exactly 2 clients
    machine.succeed("systemctl restart sonarr-init.service")
    machine.wait_for_unit("sonarr-init.service")

    result = machine.succeed(
        "API_KEY=$(grep -oP '(?<=<ApiKey>)[^<]+' /var/lib/sonarr/.config/NzbDrone/config.xml) && "
        "curl -sf http://localhost:8989/api/v3/downloadclient -H \"X-Api-Key: $API_KEY\" | "
        "jq '. | length'"
    ).strip()
    assert result == "2", f"Expected 2 Sonarr download clients after idempotency test, got {result}"

    # Verify qBittorrent has correct configuration
    machine.succeed(
        "API_KEY=$(grep -oP '(?<=<ApiKey>)[^<]+' /var/lib/sonarr/.config/NzbDrone/config.xml) && "
        "curl -sf http://localhost:8989/api/v3/downloadclient -H \"X-Api-Key: $API_KEY\" | "
        "jq -e '.[] | select(.name == \"qBittorrent\") | .protocol == \"torrent\"'"
    )

    # Verify SABnzbd has correct configuration
    machine.succeed(
        "API_KEY=$(grep -oP '(?<=<ApiKey>)[^<]+' /var/lib/sonarr/.config/NzbDrone/config.xml) && "
        "curl -sf http://localhost:8989/api/v3/downloadclient -H \"X-Api-Key: $API_KEY\" | "
        "jq -e '.[] | select(.name == \"SABnzbd\") | .protocol == \"usenet\"'"
    )
  '';
}