package hibernation

import (
	"context"
	"fmt"
	"testing"
	"time"

	"github.com/go-logr/logr"

	cloudv1 "github.com/tidbcloud/infra-api/api/v1"

	"github.com/golang/mock/gomock"
	. "github.com/onsi/gomega"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/types"
	"k8s.io/utils/pointer"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/client"
	"sigs.k8s.io/controller-runtime/pkg/client/fake"

	"k8s.io/apimachinery/pkg/runtime"

	"github.com/crossplane/provider-aws/apis/eks/manualv1alpha1"
	"k8s.io/client-go/tools/record"

	"github.com/tidbcloud/infra-api/pkg/gardener"
	gardencorev1beta1 "github.com/tidbcloud/infra-api/pkg/gardener/core/apis/v1beta1"
	gardenerfake "github.com/tidbcloud/infra-api/pkg/gardener/fake"
)

func TestShootCancelContext(t *testing.T) {
	g := NewGomegaWithT(t)
	mockCtrl := gomock.NewController(t)
	defer mockCtrl.Finish()

	s := &gardencorev1beta1.Shoot{
		ObjectMeta: metav1.ObjectMeta{
			Name:      "test",
			Namespace: "test",
		},
		Spec: gardencorev1beta1.ShootSpec{
			Hibernation: &gardencorev1beta1.Hibernation{
				Enabled: pointer.Bool(false),
			},
		},
	}
	client := fake.NewClientBuilder().WithScheme(gardener.Scheme).WithObjects(s).WithStatusSubresource(s).Build()

	api := gardenerfake.NewMockGardenerAPI(mockCtrl)
	api.EXPECT().CancelShootContext(s.Name).Times(1)
	_, err := NewHibernationController(client, nil, api, nil, metav1.LabelSelector{}, cloudv1.Hibernation{}).Reconcile(context.TODO(), ctrl.Request{
		NamespacedName: types.NamespacedName{
			Namespace: s.Namespace,
			Name:      s.Name,
		},
	})
	g.Expect(err).To(Succeed())
}

func TestClusterExistInNetwork(t *testing.T) {
	g := NewGomegaWithT(t)
	scheme := runtime.NewScheme()
	g.Expect(cloudv1.AddToScheme(scheme)).To(Succeed())

	networkName := "test"
	cluster := cloudv1.Cluster{
		ObjectMeta: metav1.ObjectMeta{
			Namespace:    "other-namespace",
			GenerateName: "test",
		},
		Spec: cloudv1.ClusterSpec{
			NetworkName: networkName,
		},
	}

	network := cloudv1.Network{
		ObjectMeta: metav1.ObjectMeta{
			Namespace: "my-namespace",
			Name:      networkName,
		},
		Spec: cloudv1.NetworkSpec{
			Region: "us-west-2",
		},
	}

	client := fake.NewClientBuilder().WithScheme(scheme).WithObjects(&cluster, &network).WithStatusSubresource(&cluster, &network).WithIndex(&cluster, "spec.networkName", func(o client.Object) []string {
		c := o.(*cloudv1.Cluster)
		return []string{c.Spec.NetworkName}
	}).Build()

	hc := HibernationController{
		infraCli: client,
		log:      logr.Discard(),
	}

	if hc.clusterExistInNetwork(network) != false {
		t.Fatalf("The namespace of network and cluster are different, there should be no cluster in the network")
	}
}

func TestEksProviderHibernation(t *testing.T) {
	g := NewGomegaWithT(t)
	scheme := runtime.NewScheme()
	g.Expect(cloudv1.AddToScheme(scheme)).To(Succeed())
	g.Expect(manualv1alpha1.SchemeBuilder.AddToScheme(scheme)).To(Succeed())

	network := cloudv1.Network{
		ObjectMeta: metav1.ObjectMeta{
			Namespace: "my-namespace",
			Name:      "network-should-be-hibernating",
			Labels: map[string]string{
				"cloud.pingcap.com/manage":        "full",
				"cloud.pingcap.com/provider-type": "eks",
			},
		},
		Spec: cloudv1.NetworkSpec{
			Region: "us-west-2",
		},
		Status: cloudv1.NetworkStatus{
			Phase: cloudv1.NetworkPhaseNormal,
		},
	}
	networkContainsCluster := cloudv1.Network{
		ObjectMeta: metav1.ObjectMeta{
			Namespace: "my-namespace-2",
			Name:      "network-contains-cluster",
			Labels: map[string]string{
				"cloud.pingcap.com/manage":        "full",
				"cloud.pingcap.com/provider-type": "eks",
			},
		},
		Spec: cloudv1.NetworkSpec{
			Region: "us-west-2",
		},
		Status: cloudv1.NetworkStatus{
			Phase: cloudv1.NetworkPhaseNormal,
		},
	}

	cluster := cloudv1.Cluster{
		ObjectMeta: metav1.ObjectMeta{
			Namespace: "my-namespace-2",
			Name:      "test",
			Labels: map[string]string{
				"cloud.pingcap.com/manage":        "full",
				"cloud.pingcap.com/provider-type": "eks",
			},
		},
		Spec: cloudv1.ClusterSpec{
			NetworkName: networkContainsCluster.Name,
		},
	}

	client := fake.NewClientBuilder().
		WithScheme(scheme).
		WithObjects(&network, &networkContainsCluster, &cluster).
		WithStatusSubresource(&cloudv1.Network{}, &cloudv1.Cluster{}).
		WithIndex(&cloudv1.Cluster{}, "spec.networkName", func(o client.Object) []string {
			c := o.(*cloudv1.Cluster)
			return []string{c.Spec.NetworkName}
		}).
		Build()

	record := record.NewFakeRecorder(1024)
	hibernationSetting := cloudv1.Hibernation{
		CheckIdleInterval: metav1.Duration{Duration: 1 * time.Second},
		IdleTimeThreshold: metav1.Duration{Duration: 10 * time.Second},
	}
	selector := metav1.LabelSelector{
		MatchLabels: map[string]string{
			"cloud.pingcap.com/manage":        "full",
			"cloud.pingcap.com/provider-type": "eks",
		},
	}
	hc := NewCloudProviderHibernationController(client, record, selector, hibernationSetting, onlyMasterWorkerInEks, featureEnabled)

	hc.RunCloudProviderHibernationController()

	g.Eventually(func() error {
		err := client.Get(context.TODO(), types.NamespacedName{Namespace: network.Namespace, Name: network.Name}, &network)
		if err != nil {
			return err
		}
		if network.Status.Phase == cloudv1.NetworkPhaseHibernating {
			return nil
		}
		return fmt.Errorf("Network status should be hibernating")
	}, 1*time.Minute, 1*time.Second).Should(Succeed())

	g.Eventually(func() error {
		err := client.Get(context.TODO(), types.NamespacedName{Namespace: network.Namespace, Name: network.Name}, &network)
		if err != nil {
			return err
		}
		if network.Status.Phase == cloudv1.NetworkPhaseHibernating {
			return nil
		}
		return fmt.Errorf("Network %s status should be hibernating", network.Name)
	}, 20*time.Minute, 1*time.Second).Should(Succeed())

	g.Eventually(func() error {
		err := client.Get(context.TODO(), types.NamespacedName{Namespace: networkContainsCluster.Namespace, Name: networkContainsCluster.Name}, &networkContainsCluster)
		if err != nil {
			return err
		}
		if networkContainsCluster.Status.Phase != cloudv1.NetworkPhaseHibernating {
			return nil
		}
		return fmt.Errorf("Network %s status should not be hibernating", networkContainsCluster.Name)
	}, 20*time.Second, 1*time.Second).Should(Succeed())
}

func onlyMasterWorkerInEks(infracli client.Client, network cloudv1.Network) bool {
	return true
}

func featureEnabled(tenantID, projectID string) bool {
	return true
}