const (
    // DefaultSystemNamespace default value for SystemNamespace
    DefaultSystemNamespace = "istio-system"

    // IntegrationTestDefaultsIOP is the path of the default IstioOperator spec to use
    // for integration tests
    IntegrationTestDefaultsIOP = "tests/integration/iop-integration-test-defaults.yaml"

    // IntegrationTestRemoteDefaultsIOP is the path of the default IstioOperator spec to use
    // on remote clusters for integration tests
    IntegrationTestRemoteDefaultsIOP = "tests/integration/iop-remote-integration-test-defaults.yaml"

    // DefaultDeployTimeout for Istio
    DefaultDeployTimeout = time.Second * 300

    // DefaultCIDeployTimeout for Istio
    DefaultCIDeployTimeout = time.Minute * 10

    // DefaultUndeployTimeout for Istio.
    DefaultUndeployTimeout = time.Second * 300

    // DefaultCIUndeployTimeout for Istio.
    DefaultCIUndeployTimeout = time.Second * 900
)

const (
    ReleasePrefix     = "istio-"
    BaseChart         = "base"
    DiscoveryChart    = "istio-discovery"
    BaseReleaseName   = ReleasePrefix + BaseChart
    IstiodReleaseName = "istiod"
    ControlChartsDir  = "istio-control"
)

type Config struct {
    // The namespace where the Istio components (<=1.1) reside in a typical deployment (default: "istio-system").
    SystemNamespace string

    // The namespace in which istio ca and cert provisioning components are deployed.
    IstioNamespace string

    // The namespace in which config, discovery and auto-injector are deployed.
    ConfigNamespace string

    // The namespace in which kiali, tracing providers, graphana, prometheus are deployed.
    TelemetryNamespace string

    // The namespace in which istio policy checker is deployed.
    PolicyNamespace string

    // The namespace in which istio ingressgateway is deployed
    IngressNamespace string

    // The namespace in which istio egressgateway is deployed
    EgressNamespace string

    // DeployTimeout the timeout for deploying Istio.
    DeployTimeout time.Duration

    // UndeployTimeout the timeout for undeploying Istio.
    UndeployTimeout time.Duration

    // The IstioOperator spec file to be used for Control plane cluster by default
    PrimaryClusterIOPFile string

    // The IstioOperator spec file to be used for Config cluster by default
    ConfigClusterIOPFile string

    // The IstioOperator spec file to be used for Remote cluster by default
    RemoteClusterIOPFile string

    // Override values specifically for the ICP crd
    // This is mostly required for cases where --set cannot be used
    // These values are applied to non-remote clusters
    ControlPlaneValues string

    // Override values specifically for the ICP crd
    // This is mostly required for cases where --set cannot be used
    // These values are only applied to remote clusters
    // Default value will be ControlPlaneValues if no remote values provided
    RemoteClusterValues string

    // Override values specifically for the ICP crd
    // This is mostly required for cases where --set cannot be used
    // These values are only applied to config clusters
    // Default value will be ControlPlaneValues if no remote values provided
    ConfigClusterValues string

    // Overrides for the Helm values file.
    Values map[string]string

    // Indicates that the test should deploy Istio into the target Kubernetes cluster before running tests.
    DeployIstio bool

    // Do not wait for the validation webhook before completing the deployment. This is useful for
    // doing deployments without Galley.
    SkipWaitForValidationWebhook bool

    // Indicates that the test should deploy Istio's east west gateway into the target Kubernetes cluster
    // before running tests.
    DeployEastWestGW bool

    // Indicates that the test should deploy Istio's using helm charts
    DeployHelm bool
}

type Instance interface {
    resource.Resource

    // IngressFor returns an ingress used for reaching workloads in the given cluster.
    // The ingress's service name will be "istio-ingressgateway" and the istio label will be "ingressgateway".
    IngressFor(cluster resource.Cluster) ingress.Instance
    // CustomIngressFor returns an ingress with a specific service name and "istio" label used for reaching workloads
    // in the given cluster.
    CustomIngressFor(cluster resource.Cluster, serviceName, istioLabel string) ingress.Instance

    // RemoteDiscoveryAddressFor returns the external address of the discovery server that controls
    // the given cluster. This allows access to the discovery server from
    // outside its cluster.
    RemoteDiscoveryAddressFor(cluster resource.Cluster) (net.TCPAddr, error)

    Settings() Config
}

type SetupConfigFn func(ctx resource.Context, cfg *Config)

type SetupContextFn func(ctx resource.Context) error