package main

import (
	"flag"
	"os"

	"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"

	forgebotv1alpha1 "git.unkin.net/unkin/forgebot/api/v1alpha1"
	"git.unkin.net/unkin/forgebot/internal/controller"
)

var scheme = runtime.NewScheme()

func init() {
	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
	utilruntime.Must(forgebotv1alpha1.AddToScheme(scheme))
}

func main() {
	var metricsAddr string
	var probeAddr string
	var leaderElect bool
	var apiURL string

	flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "metrics endpoint")
	flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "health probe endpoint")
	flag.BoolVar(&leaderElect, "leader-elect", false, "enable leader election")
	flag.StringVar(&apiURL, "api-url", "", "forgebot API base URL for task completion callbacks")
	flag.Parse()

	if v := os.Getenv("FORGEBOT_API_URL"); v != "" && apiURL == "" {
		apiURL = v
	}

	ctrl.SetLogger(zap.New(zap.UseDevMode(false)))
	logger := ctrl.Log.WithName("setup")

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

	if err := controller.SetupAll(mgr, controller.SetupOptions{APIURL: apiURL}); err != nil {
		logger.Error(err, "unable to setup controllers")
		os.Exit(1)
	}

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

	logger.Info("starting manager")
	if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
		logger.Error(err, "manager exited with error")
		os.Exit(1)
	}
}