package main

import (
	"context"
	"flag"
	"os"

	// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
	// to ensure that exec-entrypoint and run can make use of them.
	_ "k8s.io/client-go/plugin/pkg/client/auth"

	"edge-infra.dev/pkg/lib/fog"

	cmapi "github.com/cert-manager/cert-manager/pkg/apis/certmanager/v1"
	"k8s.io/apimachinery/pkg/runtime"
	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/healthz"
	"sigs.k8s.io/controller-runtime/pkg/metrics/server"
	"sigs.k8s.io/controller-runtime/pkg/webhook"

	edgeissuerv1alpha1 "edge-infra.dev/pkg/edge/edge-issuer/api/v1alpha1"
	"edge-infra.dev/pkg/edge/edge-issuer/controllers"
	"edge-infra.dev/pkg/edge/edge-issuer/signer"
	//+kubebuilder:scaffold:imports
)

// const inClusterNamespacePath = "/var/run/secrets/kubernetes.io/serviceaccount/namespace"

func main() {
	var metricsAddr string
	var probeAddr string
	var enableLeaderElection bool
	var disableApprovedCheck bool

	flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.")
	flag.StringVar(&probeAddr, "health-probe-bind-address", ":8082", "The address the probe endpoint binds to.")
	flag.BoolVar(&enableLeaderElection, "leader-elect", false,
		"Enable leader election for controller manager. "+
			"Enabling this will ensure there is only one active controller manager.")
	flag.BoolVar(&disableApprovedCheck, "disable-approved-check", false,
		"Disables waiting for CertificateRequests to have an approved condition before signing.")

	// Options for configuring logging
	log := fog.New()
	ctrl.SetLogger(log)

	setupLog := log.WithName("setup")

	scheme := runtime.NewScheme()
	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
	utilruntime.Must(cmapi.AddToScheme(scheme))
	utilruntime.Must(edgeissuerv1alpha1.AddToScheme(scheme))
	// +kubebuilder:scaffold:scheme

	setupLog.Info(
		"starting",
		"enable-leader-election", enableLeaderElection,
		"metrics-addr", metricsAddr,
	)

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme: scheme,
		Metrics: server.Options{
			BindAddress: metricsAddr,
		},
		WebhookServer: webhook.NewServer(webhook.Options{
			Port: 9443,
		}),
		HealthProbeBindAddress: probeAddr,
		LeaderElection:         enableLeaderElection,
		LeaderElectionID:       "54c549fd.edge-issuer.edge.ncr.com",
		// LeaderElectionReleaseOnCancel defines if the leader should step down voluntarily
		// when the Manager ends. This requires the binary to immediately end when the
		// Manager is stopped, otherwise, this setting is unsafe. Setting this significantly
		// speeds up voluntary leader transitions as the new leader don't have to wait
		// LeaseDuration time first.
		//
		// In the default scaffold provided, the program ends immediately after
		// the manager stops, so would be fine to enable this option. However,
		// if you are doing or is intended to do any operation such as perform cleanups
		// after the manager stops then its usage might be unsafe.
		LeaderElectionReleaseOnCancel: true,
	})
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}

	ctx, cancel := context.WithCancel(ctrl.SetupSignalHandler())
	defer cancel()

	cfg, err := controllers.NewConfig(os.Args)
	if err != nil {
		setupLog.Error(err, "an error occurred parsing config values")
		os.Exit(1)
	}

	err = cfg.AfterParse()
	if err != nil {
		log.Error(err, "an error occurred processing the parsed config values")
		os.Exit(1)
	}

	if err = (&controllers.Issuer{
		SignerBuilder: signer.FromEdgeCAStore,
		Config:        cfg,
	}).SetupWithManager(ctx, mgr); err != nil {
		setupLog.Error(err, "unable to create Signer controllers")
		os.Exit(1)
	}

	// +kubebuilder:scaffold:builder

	if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {
		setupLog.Error(err, "unable to set up health check")
		os.Exit(1)
	}
	if err := mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil {
		setupLog.Error(err, "unable to set up ready check")
		os.Exit(1)
	}

	setupLog.Info("starting manager")
	if err := mgr.Start(ctx); err != nil {
		setupLog.Error(err, "problem running manager")
		os.Exit(1)
	}
}