package main

import (
	"flag"
	"fmt"
	"os"
	goruntime "runtime"

	cmv1 "github.com/cert-manager/cert-manager/pkg/apis/certmanager/v1"
	gozap "go.uber.org/zap"
	"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/log/zap"
	metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
	gwapiv1 "sigs.k8s.io/gateway-api/apis/v1"

	"gitea.home.hrajfrisbee.cz/kacerr/gatewayapi-certificates-operator/internal/controller"
	"gitea.home.hrajfrisbee.cz/kacerr/gatewayapi-certificates-operator/internal/version"
)

func main() {
	var metricsAddr string
	var probeAddr string
	var showVersion bool

	flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metrics endpoint binds to.")
	flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
	flag.BoolVar(&showVersion, "version", false, "Print the commit this binary was built from and exit.")
	opts := zap.Options{Development: true, ZapOpts: []gozap.Option{gozap.AddCaller()}}
	opts.BindFlags(flag.CommandLine)
	flag.Parse()

	if showVersion {
		fmt.Println(version.Resolve())
		return
	}

	scheme := runtime.NewScheme()
	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
	utilruntime.Must(cmv1.AddToScheme(scheme))
	utilruntime.Must(gwapiv1.Install(scheme))

	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
	log := ctrl.Log.WithName("setup")
	log.Info("starting gateway-cert-operator", "commit", version.Resolve(), "goVersion", goruntime.Version())

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme:                 scheme,
		Metrics:                metricsserver.Options{BindAddress: metricsAddr},
		HealthProbeBindAddress: probeAddr,
	})
	if err != nil {
		log.Error(err, "unable to create manager")
		os.Exit(1)
	}

	if err := controller.SetupCertificateReconciler(mgr); err != nil {
		log.Error(err, "unable to setup certificate controller")
		os.Exit(1)
	}

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

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