/*
 * Copyright (c) 2024 Huawei Technologies Co., Ltd.
 * openFuyao is licensed under Mulan PSL v2.
 * You can use this software according to the terms and conditions of the Mulan PSL v2.
 * You may obtain a copy of Mulan PSL v2 at:
 *          http://license.coscl.org.cn/MulanPSL2
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PSL v2 for more details.
 *
 * Code generated by kubebuilder. DO NOT EDIT.
 *
 * functions modified:
 * use prepareAddrs and prepareBools to gather parameters in main()
 * add AddToScheme methods in func init()
 * function add:
 * func initManager()
 */

// npu-operator is the entrypoint for the operator
package main

import (
	"crypto/tls"
	"flag"
	"os"

	monitoringv1 "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1"
	"go.uber.org/zap/zapcore"
	apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/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/log/zap"
	"sigs.k8s.io/controller-runtime/pkg/manager"
	"sigs.k8s.io/controller-runtime/pkg/metrics/filters"
	metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
	"sigs.k8s.io/controller-runtime/pkg/webhook"
	"volcano.sh/apis/pkg/apis/batch/v1alpha1"
	busv1alpha1 "volcano.sh/apis/pkg/apis/bus/v1alpha1"
	flowv1alpha1 "volcano.sh/apis/pkg/apis/flow/v1alpha1"
	nodeinfov1alpha1 "volcano.sh/apis/pkg/apis/nodeinfo/v1alpha1"
	"volcano.sh/apis/pkg/apis/scheduling"
	// +kubebuilder:scaffold:imports

	v1 "openfuyao.com/npu-operator/api/v1"
	"openfuyao.com/npu-operator/internal/controller"
)

var (
	scheme   = runtime.NewScheme()
	setupLog = ctrl.Log.WithName("setup")
)

func init() {
	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
	utilruntime.Must(v1.AddToScheme(scheme))
	utilruntime.Must(apiextensionsv1.AddToScheme(scheme))
	utilruntime.Must(v1alpha1.AddToScheme(scheme))
	utilruntime.Must(busv1alpha1.AddToScheme(scheme))
	utilruntime.Must(flowv1alpha1.AddToScheme(scheme))
	utilruntime.Must(nodeinfov1alpha1.AddToScheme(scheme))
	utilruntime.Must(scheduling.AddToScheme(scheme))
	utilruntime.Must(monitoringv1.AddToScheme(scheme))

	// +kubebuilder:scaffold:scheme
}

func main() {
	var metricsAddr string
	var enableLeaderElection bool
	var probeAddr string
	var secureMetrics bool
	var enableHTTP2 bool
	flag.StringVar(&metricsAddr, "metrics-bind-address", "0", "The address the metrics endpoint binds to. "+
		"Use :8443 for HTTPS or :8080 for HTTP, or leave as 0 to disable the metrics service.")
	flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "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(&secureMetrics, "metrics-secure", true,
		"If set, the metrics endpoint is served securely via HTTPS. Use --metrics-secure=false to use HTTP instead.")
	flag.BoolVar(&enableHTTP2, "enable-http2", false,
		"If set, HTTP/2 will be enabled for the metrics and webhook servers")
	mgr, err := initManager(enableHTTP2, metricsAddr, secureMetrics, probeAddr, enableLeaderElection)

	if err = (&controller.NPUClusterPolicyReconciler{
		Client: mgr.GetClient(),
		Scheme: mgr.GetScheme(),
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "NPUClusterPolicy")
		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(ctrl.SetupSignalHandler()); err != nil {
		setupLog.Error(err, "problem running manager")
		os.Exit(1)
	}
}

func initManager(enableHTTP2 bool, metricsAddr string, secureMetrics bool, probeAddr string,
	enableLeaderElection bool) (manager.Manager, error) {
	opts := zap.Options{
		Development:          true,
		Level:                zapcore.InfoLevel,
		StacktraceLevel:      zapcore.ErrorLevel,
		TimeEncoder:          zapcore.RFC3339NanoTimeEncoder,
		EncoderConfigOptions: []zap.EncoderConfigOption{},
	}
	opts.BindFlags(flag.CommandLine)
	flag.Parse()

	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))

	disableHTTP2 := func(c *tls.Config) {
		setupLog.Info("disabling http/2")
		c.NextProtos = []string{"http/1.1"}
	}

	var tlsOpts []func(*tls.Config)
	if !enableHTTP2 {
		tlsOpts = append(tlsOpts, disableHTTP2)
	}

	webhookServer := webhook.NewServer(webhook.Options{
		TLSOpts: tlsOpts,
	})

	metricsServerOptions := metricsserver.Options{
		BindAddress:   metricsAddr,
		SecureServing: secureMetrics,
		TLSOpts:       tlsOpts,
	}

	if secureMetrics {
		metricsServerOptions.FilterProvider = filters.WithAuthenticationAndAuthorization
	}

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme:                        scheme,
		Metrics:                       metricsServerOptions,
		WebhookServer:                 webhookServer,
		HealthProbeBindAddress:        probeAddr,
		LeaderElection:                enableLeaderElection,
		LeaderElectionID:              "348bca99.openfuyao.com",
		LeaderElectionReleaseOnCancel: true,
	})
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}
	return mgr, err
}