/*
Copyright © 2022 ESO Maintainer Team

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package cmd

import (
	"os"
	"time"

	"github.com/spf13/cobra"
	"go.uber.org/zap/zapcore"
	v1 "k8s.io/api/core/v1"
	apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
	"k8s.io/apimachinery/pkg/runtime"
	clientgoscheme "k8s.io/client-go/kubernetes/scheme"

	// To allow using gcp auth.
	_ "k8s.io/client-go/plugin/pkg/client/auth"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/client"
	"sigs.k8s.io/controller-runtime/pkg/controller"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"

	esv1alpha1 "github.com/external-secrets/external-secrets/apis/externalsecrets/v1alpha1"
	esv1beta1 "github.com/external-secrets/external-secrets/apis/externalsecrets/v1beta1"
	"github.com/external-secrets/external-secrets/pkg/controllers/externalsecret"
	"github.com/external-secrets/external-secrets/pkg/controllers/secretstore"
)

var (
	scheme                        = runtime.NewScheme()
	setupLog                      = ctrl.Log.WithName("setup")
	dnsName                       string
	certDir                       string
	metricsAddr                   string
	healthzAddr                   string
	controllerClass               string
	enableLeaderElection          bool
	concurrent                    int
	loglevel                      string
	namespace                     string
	storeRequeueInterval          time.Duration
	serviceName, serviceNamespace string
	secretName, secretNamespace   string
	crdRequeueInterval            time.Duration
	certCheckInterval             time.Duration
)

const (
	errCreateController = "unable to create controller"
)

func init() {
	_ = clientgoscheme.AddToScheme(scheme)
	_ = esv1beta1.AddToScheme(scheme)
	_ = esv1alpha1.AddToScheme(scheme)
	_ = apiextensionsv1.AddToScheme(scheme)
}

var rootCmd = &cobra.Command{
	Use:   "external-secrets",
	Short: "operator that reconciles ExternalSecrets and SecretStores",
	Long:  `For more information visit https://external-secrets.io`,
	Run: func(cmd *cobra.Command, args []string) {
		var lvl zapcore.Level
		err := lvl.UnmarshalText([]byte(loglevel))
		if err != nil {
			setupLog.Error(err, "error unmarshalling loglevel")
			os.Exit(1)
		}
		logger := zap.New(zap.Level(lvl))
		ctrl.SetLogger(logger)

		mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
			Scheme:             scheme,
			MetricsBindAddress: metricsAddr,
			Port:               9443,
			LeaderElection:     enableLeaderElection,
			LeaderElectionID:   "external-secrets-controller",
			ClientDisableCacheFor: []client.Object{
				// the client creates a ListWatch for all resource kinds that
				// are requested with .Get().
				// We want to avoid to cache all secrets or configmaps in memory.
				// The ES controller uses v1.PartialObjectMetadata for the secrets
				// that he owns.
				// see #721
				&v1.Secret{},
				&v1.ConfigMap{},
			},
			Namespace: namespace,
		})
		if err != nil {
			setupLog.Error(err, "unable to start manager")
			os.Exit(1)
		}
		if err = (&secretstore.StoreReconciler{
			Client:          mgr.GetClient(),
			Log:             ctrl.Log.WithName("controllers").WithName("SecretStore"),
			Scheme:          mgr.GetScheme(),
			ControllerClass: controllerClass,
			RequeueInterval: storeRequeueInterval,
		}).SetupWithManager(mgr); err != nil {
			setupLog.Error(err, errCreateController, "controller", "SecretStore")
			os.Exit(1)
		}
		if err = (&secretstore.ClusterStoreReconciler{
			Client:          mgr.GetClient(),
			Log:             ctrl.Log.WithName("controllers").WithName("ClusterSecretStore"),
			Scheme:          mgr.GetScheme(),
			ControllerClass: controllerClass,
			RequeueInterval: storeRequeueInterval,
		}).SetupWithManager(mgr); err != nil {
			setupLog.Error(err, errCreateController, "controller", "ClusterSecretStore")
			os.Exit(1)
		}
		if err = (&externalsecret.Reconciler{
			Client:          mgr.GetClient(),
			Log:             ctrl.Log.WithName("controllers").WithName("ExternalSecret"),
			Scheme:          mgr.GetScheme(),
			ControllerClass: controllerClass,
			RequeueInterval: time.Hour,
		}).SetupWithManager(mgr, controller.Options{
			MaxConcurrentReconciles: concurrent,
		}); err != nil {
			setupLog.Error(err, errCreateController, "controller", "ExternalSecret")
			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 Execute() {
	cobra.CheckErr(rootCmd.Execute())
}

func init() {
	rootCmd.Flags().StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
	rootCmd.Flags().StringVar(&controllerClass, "controller-class", "default", "the controller is instantiated with a specific controller name and filters ES based on this property")
	rootCmd.Flags().BoolVar(&enableLeaderElection, "enable-leader-election", false,
		"Enable leader election for controller manager. "+
			"Enabling this will ensure there is only one active controller manager.")
	rootCmd.Flags().IntVar(&concurrent, "concurrent", 1, "The number of concurrent ExternalSecret reconciles.")
	rootCmd.Flags().StringVar(&loglevel, "loglevel", "info", "loglevel to use, one of: debug, info, warn, error, dpanic, panic, fatal")
	rootCmd.Flags().StringVar(&namespace, "namespace", "", "watch external secrets scoped in the provided namespace only. ClusterSecretStore can be used but only work if it doesn't reference resources from other namespaces")
	rootCmd.Flags().DurationVar(&storeRequeueInterval, "store-requeue-interval", time.Minute*5, "Time duration between reconciling (Cluster)SecretStores")
}