const (
    // MetadataNamespace is the namespace for mesh metadata (labels, annotations)
    MetadataNamespace = "install.operator.istio.io"
    // OwningResourceName represents the name of the owner to which the resource relates
    OwningResourceName = MetadataNamespace + "/owning-resource"
    // OwningResourceNamespace represents the namespace of the owner to which the resource relates
    OwningResourceNamespace = MetadataNamespace + "/owning-resource-namespace"

    // IstioComponentLabelStr indicates which Istio component a resource belongs to.
    IstioComponentLabelStr = name.OperatorAPINamespace + "/component"
)

var (
    // ComponentDependencies is a tree of component dependencies. The semantics are ComponentDependencies[cname] gives
    // the subtree of components that must wait for cname to be installed before starting installation themselves.
    ComponentDependencies = componentNameToListMap{
        name.PilotComponentName: {
            name.CNIComponentName,
            name.IngressComponentName,
            name.EgressComponentName,
        },
        name.IstioBaseComponentName: {
            name.PilotComponentName,
            name.IstiodRemoteComponentName,
        },
    }

    // InstallTree is a top down hierarchy tree of dependencies where children must wait for the parent to complete
    // before starting installation.
    InstallTree = make(ComponentTree)
)

var (
    // NamespacedResources orders non cluster scope resources types which should be deleted, first to last
    NamespacedResources = []schema.GroupVersionKind{
        {Group: "autoscaling", Version: "v2beta1", Kind: name.HPAStr},
        {Group: "policy", Version: "v1beta1", Kind: name.PDBStr},
        {Group: "apps", Version: "v1", Kind: name.DeploymentStr},
        {Group: "apps", Version: "v1", Kind: name.DaemonSetStr},
        {Group: "", Version: "v1", Kind: name.ServiceStr},
        {Group: "", Version: "v1", Kind: name.CMStr},
        {Group: "", Version: "v1", Kind: name.PVCStr},
        {Group: "", Version: "v1", Kind: name.PodStr},
        {Group: "", Version: "v1", Kind: name.SecretStr},
        {Group: "", Version: "v1", Kind: name.SAStr},
        {Group: "rbac.authorization.k8s.io", Version: "v1", Kind: name.RoleBindingStr},
        {Group: "rbac.authorization.k8s.io", Version: "v1", Kind: name.RoleStr},
        {Group: name.NetworkingAPIGroupName, Version: "v1alpha3", Kind: name.DestinationRuleStr},
        {Group: name.NetworkingAPIGroupName, Version: "v1alpha3", Kind: name.EnvoyFilterStr},
        {Group: name.NetworkingAPIGroupName, Version: "v1alpha3", Kind: name.GatewayStr},
        {Group: name.NetworkingAPIGroupName, Version: "v1alpha3", Kind: name.VirtualServiceStr},
        {Group: name.SecurityAPIGroupName, Version: "v1beta1", Kind: name.PeerAuthenticationStr},
    }

    // ClusterResources are resource types the operator prunes, ordered by which types should be deleted, first to last.
    ClusterResources = []schema.GroupVersionKind{
        {Group: "admissionregistration.k8s.io", Version: "v1beta1", Kind: name.MutatingWebhookConfigurationStr},
        {Group: "admissionregistration.k8s.io", Version: "v1beta1", Kind: name.ValidatingWebhookConfigurationStr},
        {Group: "rbac.authorization.k8s.io", Version: "v1", Kind: name.ClusterRoleStr},
        {Group: "rbac.authorization.k8s.io", Version: "v1", Kind: name.ClusterRoleBindingStr},
    }
    // ClusterCPResources lists cluster scope resources types which should be deleted during uninstall command.
    ClusterCPResources = []schema.GroupVersionKind{
        {Group: "admissionregistration.k8s.io", Version: "v1beta1", Kind: name.MutatingWebhookConfigurationStr},
        {Group: "admissionregistration.k8s.io", Version: "v1", Kind: name.MutatingWebhookConfigurationStr},
        {Group: "rbac.authorization.k8s.io", Version: "v1", Kind: name.ClusterRoleStr},
        {Group: "rbac.authorization.k8s.io", Version: "v1", Kind: name.ClusterRoleBindingStr},
    }
    // AllClusterResources lists all cluster scope resources types which should be deleted in purge case, including CRD.
    AllClusterResources = append(ClusterResources,
        schema.GroupVersionKind{Group: "admissionregistration.k8s.io", Version: "v1beta1", Kind: name.MutatingWebhookConfigurationStr},
        schema.GroupVersionKind{Group: "admissionregistration.k8s.io", Version: "v1beta1", Kind: name.ValidatingWebhookConfigurationStr},
        schema.GroupVersionKind{Group: "apiextensions.k8s.io", Version: "v1", Kind: name.CRDStr},
        schema.GroupVersionKind{Group: "apiextensions.k8s.io", Version: "v1beta1", Kind: name.CRDStr})
)

var (
    // TestMode sets the controller into test mode. Used for unit tests to bypass things like waiting on resources.
    TestMode = false
)

type ComponentTree map[name.ComponentName]interface{}

type HelmReconciler struct {
    // contains filtered or unexported fields
}

type Options struct {
    // DryRun executes all actions but does not write anything to the cluster.
    DryRun bool
    // Log is a console logger for user visible CLI output.
    Log clog.Logger
    // Wait determines if we will wait for resources to be fully applied. Only applies to components that have no
    // dependencies.
    Wait bool
    // WaitTimeout controls the amount of time to wait for resources in a component to become ready before giving up.
    WaitTimeout time.Duration
    // Log tracks the installation progress for all components.
    ProgressLog *progress.Log
    // Force ignores validation errors
    Force bool
}