{
  pkgs,
  lib,
  self,
}:

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

  nodes = {
    # Test 1: Profile resolution, anime fallback (null -> profileName), idempotency,
    # and graceful skip when settings.json is missing.
    machine =
      { pkgs, lib, ... }:
      {
        imports = [ self.nixosModules.default ];

        system.stateVersion = "24.11";

        virtualisation.memorySize = 4096;

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

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

        services.radarr = {
          enable = true;
          dataDir = "/var/lib/radarr/.config/Radarr";
          settings.server.port = lib.mkDefault 7878;
        };

        # Mock Jellyseerr (not in nixpkgs); the init script only needs the
        # systemd unit to exist so Requires/After are satisfied and
        # `systemctl restart jellyseerr.service` succeeds.
        systemd.services.jellyseerr = {
          description = "Mock Jellyseerr";
          wantedBy = [ "multi-user.target" ];
          serviceConfig = {
            Type = "simple";
            ExecStart = "${pkgs.coreutils}/bin/sleep infinity";
          };
        };

        systemd.tmpfiles.rules = [
          "d /var/lib/jellyseerr 0755 root root -"
        ];

        services.jellyseerrInit = {
          enable = true;
          configDir = "/var/lib/jellyseerr";
          radarr = {
            profileName = "Any";
            dataDir = "/var/lib/radarr/.config/Radarr";
            port = 7878;
            serviceName = "radarr";
          };
          sonarr = {
            profileName = "Any";
            # animeProfileName defaults to null -> Nix config falls back to profileName
            dataDir = "/var/lib/sonarr/.config/NzbDrone";
            port = 8989;
            serviceName = "sonarr";
          };
        };
      };

    # Test 2: Explicit animeProfileName differs from profileName
    explicit_anime =
      { pkgs, lib, ... }:
      {
        imports = [ self.nixosModules.default ];

        system.stateVersion = "24.11";

        virtualisation.memorySize = 4096;

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

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

        services.radarr = {
          enable = true;
          dataDir = "/var/lib/radarr/.config/Radarr";
          settings.server.port = lib.mkDefault 7878;
        };

        systemd.services.jellyseerr = {
          description = "Mock Jellyseerr";
          wantedBy = [ "multi-user.target" ];
          serviceConfig = {
            Type = "simple";
            ExecStart = "${pkgs.coreutils}/bin/sleep infinity";
          };
        };

        systemd.tmpfiles.rules = [
          "d /var/lib/jellyseerr 0755 root root -"
        ];

        services.jellyseerrInit = {
          enable = true;
          configDir = "/var/lib/jellyseerr";
          radarr = {
            profileName = "Any";
            dataDir = "/var/lib/radarr/.config/Radarr";
            port = 7878;
            serviceName = "radarr";
          };
          sonarr = {
            profileName = "Any";
            animeProfileName = "SD";
            dataDir = "/var/lib/sonarr/.config/NzbDrone";
            port = 8989;
            serviceName = "sonarr";
          };
        };
      };
  };

  testScript = ''
    start_all()

    # ===== Test 1a: Basic profile resolution + anime fallback =====

    machine.wait_for_unit("sonarr.service")
    machine.wait_for_unit("radarr.service")
    machine.wait_for_unit("jellyseerr.service")

    # Wait for Sonarr API
    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,
    )

    # Wait for Radarr API
    machine.wait_until_succeeds(
        "API_KEY=$(grep -oP '(?<=<ApiKey>)[^<]+' /var/lib/radarr/.config/Radarr/config.xml) && "
        "curl -sf http://localhost:7878/api/v3/system/status -H \"X-Api-Key: $API_KEY\"",
        timeout=120,
    )

    # Create settings.json with placeholder profile data
    import json
    settings = {
        "radarr": [
            {
                "name": "Radarr Main",
                "activeProfileId": -1,
                "activeProfileName": "",
            }
        ],
        "sonarr": [
            {
                "name": "Sonarr Main",
                "activeProfileId": -1,
                "activeProfileName": "",
                "activeAnimeProfileId": -1,
                "activeAnimeProfileName": "",
            }
        ],
    }
    machine.succeed(
        f"cat > /var/lib/jellyseerr/settings.json << 'SETTINGS'\n"
        f"{json.dumps(settings, indent=2)}\n"
        f"SETTINGS"
    )

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

    # Verify Radarr profile was resolved
    machine.succeed(
        "jq -e '.radarr[0].activeProfileName == \"Any\"' /var/lib/jellyseerr/settings.json"
    )
    machine.succeed(
        "jq -e '.radarr[0].activeProfileId > 0' /var/lib/jellyseerr/settings.json"
    )

    # Verify Sonarr profile was resolved
    machine.succeed(
        "jq -e '.sonarr[0].activeProfileName == \"Any\"' /var/lib/jellyseerr/settings.json"
    )
    machine.succeed(
        "jq -e '.sonarr[0].activeProfileId > 0' /var/lib/jellyseerr/settings.json"
    )

    # Verify anime profile defaulted to regular profile (animeProfileName was null)
    machine.succeed(
        "jq -e '.sonarr[0].activeAnimeProfileName == \"Any\"' /var/lib/jellyseerr/settings.json"
    )
    machine.succeed(
        "jq -e '.sonarr[0].activeAnimeProfileId == .sonarr[0].activeProfileId' /var/lib/jellyseerr/settings.json"
    )

    # ===== Test 1b: Idempotency — second run should not rewrite the file =====

    machine.succeed("cp /var/lib/jellyseerr/settings.json /tmp/settings_before.json")
    machine.succeed("systemctl restart jellyseerr-init.service")
    machine.wait_for_unit("jellyseerr-init.service")
    machine.succeed("diff /tmp/settings_before.json /var/lib/jellyseerr/settings.json")

    # ===== Test 1c: Missing settings.json — graceful skip =====

    machine.succeed("rm /var/lib/jellyseerr/settings.json")
    machine.succeed("systemctl restart jellyseerr-init.service")
    machine.wait_for_unit("jellyseerr-init.service")
    machine.succeed("test ! -f /var/lib/jellyseerr/settings.json")

    # ===== Test 2: Explicit anime profile (SD) differs from regular (Any) =====

    explicit_anime.wait_for_unit("sonarr.service")
    explicit_anime.wait_for_unit("radarr.service")
    explicit_anime.wait_for_unit("jellyseerr.service")

    explicit_anime.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: $API_KEY\"",
        timeout=120,
    )
    explicit_anime.wait_until_succeeds(
        "API_KEY=$(grep -oP '(?<=<ApiKey>)[^<]+' /var/lib/radarr/.config/Radarr/config.xml) && "
        "curl -sf http://localhost:7878/api/v3/system/status -H \"X-Api-Key: $API_KEY\"",
        timeout=120,
    )

    explicit_anime.succeed(
        f"cat > /var/lib/jellyseerr/settings.json << 'SETTINGS'\n"
        f"{json.dumps(settings, indent=2)}\n"
        f"SETTINGS"
    )

    explicit_anime.succeed("systemctl restart jellyseerr-init.service")
    explicit_anime.wait_for_unit("jellyseerr-init.service")

    # Regular profile is "Any"
    explicit_anime.succeed(
        "jq -e '.sonarr[0].activeProfileName == \"Any\"' /var/lib/jellyseerr/settings.json"
    )

    # Anime profile is "SD" (explicitly set)
    explicit_anime.succeed(
        "jq -e '.sonarr[0].activeAnimeProfileName == \"SD\"' /var/lib/jellyseerr/settings.json"
    )

    # Profile IDs must differ since the profiles are different
    explicit_anime.succeed(
        "jq -e '.sonarr[0].activeAnimeProfileId != .sonarr[0].activeProfileId' /var/lib/jellyseerr/settings.json"
    )
  '';
}