package main

import (
	"flag"
	"os"

	"go.uber.org/zap/zapcore"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
	_ "k8s.io/client-go/plugin/pkg/client/auth" // Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/cache"
	"sigs.k8s.io/controller-runtime/pkg/client"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"
	metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
	"sigs.k8s.io/controller-runtime/pkg/predicate"
	"sigs.k8s.io/controller-runtime/pkg/webhook"

	cpeksv1beta1 "github.com/crossplane-contrib/provider-aws/apis/eks/v1beta1"
	cpawsv1beta1 "github.com/crossplane-contrib/provider-aws/apis/v1beta1"
	gcpv1beta1 "github.com/crossplane-contrib/provider-gcp/apis/v1beta1"
	cloudv1 "github.com/tidbcloud/infra-api/api/v1"

	"github.com/tidbcloud/eks-provider/api/v1alpha1"
	"github.com/tidbcloud/infra-provider/pkg/procedure"

	"github.com/tidbcloud/chaos-provider/controllers/chaos"
	"github.com/tidbcloud/chaos-provider/pkg/config"
)

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

func loadSchema() {
	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
	utilruntime.Must(v1alpha1.SchemeBuilder.AddToScheme(scheme))
	utilruntime.Must(cloudv1.SchemeBuilder.AddToScheme(scheme))
	// +kubuilder:scaffold:scheme
}

func loadAWSScheme() {
	utilruntime.Must(cpeksv1beta1.SchemeBuilder.AddToScheme(scheme))
	utilruntime.Must(cpawsv1beta1.SchemeBuilder.AddToScheme(scheme))
}

func loadGCPScheme() {
	utilruntime.Must(gcpv1beta1.SchemeBuilder.AddToScheme(scheme))
}

func main() {
	var metricsAddr string
	var enableLeaderElection bool
	var probeAddr string
	var chaosConfig string
	var namespace string
	flag.StringVar(&metricsAddr, "metrics-bind-address", ":7070", "The address the metric endpoint binds to.")
	flag.StringVar(&probeAddr, "health-probe-bind-address", ":7071", "The address the probe endpoint binds to.")
	flag.StringVar(&namespace, "namespace", procedure.ProcedureNamespace, "The namespace for storing EKSConnection configmap and resources.")
	flag.BoolVar(&enableLeaderElection, "leader-elect", false,
		"Enable leader election for controller manager. "+
			"Enabling this will ensure there is only one active controller manager.")
	flag.StringVar(&chaosConfig, "chaos-config", "", "The path to the chaos config.")
	opts := zap.Options{
		Development: true,
		TimeEncoder: zapcore.RFC3339TimeEncoder,
	}
	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
	opts.BindFlags(flag.CommandLine)
	flag.Parse()

	config, err := config.LoadChaosConfig(chaosConfig)
	if err != nil {
		setupLog.Error(err, "unable to load chaos config")
		os.Exit(1)
	}

	predicates := config.Predicate

	var region, provider string
	var ok bool
	if predicates.MatchLabels == nil {
		setupLog.Info("no predicate labels are configured")
		os.Exit(1)
	}
	if region, ok = predicates.MatchLabels[cloudv1.RegionLabel]; !ok {
		setupLog.Info("no region predicate are configured")
		os.Exit(1)
	}

	if provider, ok = predicates.MatchLabels[cloudv1.ProviderTypeLabel]; !ok {
		setupLog.Info("no providertype predicate are configured")
		os.Exit(1)
	}

	setupLog.Info("loading scheme")
	loadSchema()
	loadAWSScheme()
	loadGCPScheme()

	setupLog.Info("start", "chaos-provider", provider, "region", region)

	if config.Region == "" {
		setupLog.Error(err, "region information is required")
		os.Exit(1)
	}
	selector, err := metav1.LabelSelectorAsSelector(&predicates)
	if err != nil {
		setupLog.Error(err, "invalid predicates")
		os.Exit(1)
	}

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme: scheme,
		Metrics: metricsserver.Options{
			BindAddress: metricsAddr,
		},
		WebhookServer: webhook.NewServer(webhook.Options{
			Port: 9443,
		}),
		HealthProbeBindAddress: probeAddr,
		LeaderElection:         enableLeaderElection,
		LeaderElectionID:       "chaos-provider.infra.pingcap.com",
		// Only load objects to local cache if it matches the label selector.
		Cache: cache.Options{
			ByObject: map[client.Object]cache.ByObject{
				&v1alpha1.ChaosServer{}: {
					Label: selector,
				},
			},
		},
	})
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}

	p, err := predicate.LabelSelectorPredicate(predicates)
	if err != nil {
		setupLog.Error(err, "unable to create predicate")
		os.Exit(1)
	}

	setupLog.Info("registering controllers")
	if err = (&chaos.ChaosServerReconciler{
		Logger:        ctrl.Log.WithName("controllers").WithName("ChaosServer"),
		EventRecorder: mgr.GetEventRecorderFor("chaosserver-controller"),
		Scheme:        scheme,
		Client:        mgr.GetClient(),
		Cache:         mgr.GetCache(),
		Config:        config,
	}).SetupWithManager(mgr, p); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "ChaosServer")
		os.Exit(1)
	}

	setupLog.Info("registring chaos workflow controller")
	if err = (&chaos.ChaosWorkflowReconciler{
		Logger:        ctrl.Log.WithName("controllers").WithName("ChaosWorkflow"),
		EventRecorder: mgr.GetEventRecorderFor("chaosworkflow-controller"),
		Scheme:        mgr.GetScheme(),
		Client:        mgr.GetClient(),
		Cache:         mgr.GetCache(),
		Config:        config,
	}).SetupWithManager(mgr, p); err != nil {
		setupLog.Error(err, "unable to create chaosworkflow controllers", "controller", "ChaosWorkflow")
		os.Exit(1)
	}

	setupLog.Info("registring chaos workflownode controller")
	if err = (&chaos.ChaosWorkflowNodeReconciler{
		Logger:        ctrl.Log.WithName("controllers").WithName("ChaosWorkflowNode"),
		EventRecorder: mgr.GetEventRecorderFor("chaosworkflownode-controller"),
		Scheme:        mgr.GetScheme(),
		Client:        mgr.GetClient(),
		Cache:         mgr.GetCache(),
		Config:        config,
	}).SetupWithManager(mgr, p); err != nil {
		setupLog.Error(err, "unable to create chaosworkflownode controllers", "controller", "ChaosWorkflow")
		os.Exit(1)
	}

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