package e2e

import (
	"context"
	"fmt"
	"strconv"
	"strings"

	v1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/api/resource"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/kubernetes/test/e2e/framework"
)

const (
	staticPVSize         = "4Gi"
	staticPVNewSize      = "8Gi"
	staticPVImageFeature = "layering"
	monsPrefix           = "mons-"
	imagePrefix          = "image-"
	migIdentifier        = "mig"
	intreeVolPrefix      = "kubernetes-dynamic-pvc-"
)

// nolint:unparam // currently name receive pvName, this can change in the future
func getStaticPV(
	name, volName, size, secretName, secretNS, sc, driverName string,
	blockPV bool,
	options, annotations map[string]string, policy v1.PersistentVolumeReclaimPolicy) *v1.PersistentVolume {
	pv := &v1.PersistentVolume{
		ObjectMeta: metav1.ObjectMeta{
			Name: name,
		},
		Spec: v1.PersistentVolumeSpec{
			PersistentVolumeReclaimPolicy: policy,
			Capacity: v1.ResourceList{
				v1.ResourceStorage: resource.MustParse(size),
			},
			PersistentVolumeSource: v1.PersistentVolumeSource{
				CSI: &v1.CSIPersistentVolumeSource{
					Driver:           driverName,
					VolumeHandle:     volName,
					ReadOnly:         false,
					VolumeAttributes: options,
					NodeStageSecretRef: &v1.SecretReference{
						Name:      secretName,
						Namespace: secretNS,
					},
				},
			},
			StorageClassName: sc,
			AccessModes:      []v1.PersistentVolumeAccessMode{v1.ReadWriteOnce},
		},
	}

	if blockPV {
		volumeMode := v1.PersistentVolumeBlock
		pv.Spec.VolumeMode = &volumeMode
	} else {
		volumeMode := v1.PersistentVolumeFilesystem
		pv.Spec.VolumeMode = &volumeMode
	}
	if len(annotations) > 0 {
		pv.Annotations = make(map[string]string)
		for k, v := range annotations {
			pv.Annotations[k] = v
		}
	}

	return pv
}

// nolint:unparam // currently name receive same name, this can change in the future
func getStaticPVC(name, pvName, size, ns, sc string, blockPVC bool) *v1.PersistentVolumeClaim {
	pvc := &v1.PersistentVolumeClaim{
		ObjectMeta: metav1.ObjectMeta{
			Name:      name,
			Namespace: ns,
		},
		Spec: v1.PersistentVolumeClaimSpec{
			Resources: v1.ResourceRequirements{
				Requests: v1.ResourceList{
					v1.ResourceStorage: resource.MustParse(size),
				},
			},
			AccessModes:      []v1.PersistentVolumeAccessMode{v1.ReadWriteOnce},
			VolumeName:       pvName,
			StorageClassName: &sc,
		},
	}
	if blockPVC {
		volumeMode := v1.PersistentVolumeBlock
		pvc.Spec.VolumeMode = &volumeMode
	} else {
		volumeMode := v1.PersistentVolumeFilesystem
		pvc.Spec.VolumeMode = &volumeMode
	}

	return pvc
}

func validateRBDStaticPV(f *framework.Framework, appPath string, isBlock, checkImgFeat bool) error {
	opt := make(map[string]string)
	var (
		rbdImageName = "test-static-pv"
		pvName       = "pv-name"
		pvcName      = "pvc-name"
		namespace    = f.UniqueName
		// minikube creates default class in cluster, we need to set dummy
		// storageclass on PV and PVC to avoid storageclass name mismatch
		sc = "storage-class"
	)

	c := f.ClientSet

	fsID, e, err := execCommandInToolBoxPod(f, "ceph fsid", rookNamespace)
	if err != nil {
		return err
	}
	if e != "" {
		return fmt.Errorf("failed to get fsid from ceph cluster %s", e)
	}
	// remove new line present in fsID
	fsID = strings.Trim(fsID, "\n")
	size := staticPVSize
	// create rbd image
	cmd := fmt.Sprintf(
		"rbd create %s --size=%s --image-feature=layering %s",
		rbdImageName,
		staticPVSize,
		rbdOptions(defaultRBDPool))

	_, e, err = execCommandInToolBoxPod(f, cmd, rookNamespace)
	if err != nil {
		return err
	}
	if e != "" {
		return fmt.Errorf("failed to create rbd image %s", e)
	}
	opt["clusterID"] = fsID
	if !checkImgFeat {
		opt["imageFeatures"] = staticPVImageFeature
	}
	opt["pool"] = defaultRBDPool
	opt["staticVolume"] = strconv.FormatBool(true)
	if radosNamespace != "" {
		opt["radosNamespace"] = radosNamespace
	}

	pv := getStaticPV(
		pvName,
		rbdImageName,
		size,
		rbdNodePluginSecretName,
		cephCSINamespace,
		sc,
		"rbd.csi.ceph.com",
		isBlock,
		opt,
		nil, retainPolicy)

	_, err = c.CoreV1().PersistentVolumes().Create(context.TODO(), pv, metav1.CreateOptions{})
	if err != nil {
		return fmt.Errorf("PV Create API error: %w", err)
	}

	pvc := getStaticPVC(pvcName, pvName, size, namespace, sc, isBlock)

	_, err = c.CoreV1().PersistentVolumeClaims(pvc.Namespace).Create(context.TODO(), pvc, metav1.CreateOptions{})
	if err != nil {
		return fmt.Errorf("PVC Create API error: %w", err)
	}
	// bind pvc to app
	app, err := loadApp(appPath)
	if err != nil {
		return err
	}

	app.Labels = make(map[string]string)
	app.Labels[appKey] = appLabel
	appOpt := metav1.ListOptions{
		LabelSelector: fmt.Sprintf("%s=%s", appKey, appLabel),
	}
	app.Namespace = namespace
	app.Spec.Volumes[0].PersistentVolumeClaim.ClaimName = pvcName
	if checkImgFeat {
		err = createAppErr(f.ClientSet, app, deployTimeout, "missing required parameter imageFeatures")
	} else {
		err = createApp(f.ClientSet, app, deployTimeout)
	}
	if err != nil {
		return err
	}

	err = deletePod(app.Name, app.Namespace, f.ClientSet, deployTimeout)
	if err != nil {
		return err
	}

	// resize image only if the image is already mounted and formatted
	if !checkImgFeat {
		err = validateRBDStaticResize(f, app, &appOpt, pvc, rbdImageName)
		if err != nil {
			return err
		}
	}

	err = c.CoreV1().PersistentVolumeClaims(pvc.Namespace).Delete(context.TODO(), pvc.Name, metav1.DeleteOptions{})
	if err != nil {
		return fmt.Errorf("failed to delete pvc: %w", err)
	}

	err = c.CoreV1().PersistentVolumes().Delete(context.TODO(), pv.Name, metav1.DeleteOptions{})
	if err != nil {
		return fmt.Errorf("failed to delete pv: %w", err)
	}

	cmd = fmt.Sprintf("rbd rm %s %s", rbdImageName, rbdOptions(defaultRBDPool))
	_, _, err = execCommandInToolBoxPod(f, cmd, rookNamespace)

	return err
}

func validateRBDStaticMigrationPV(f *framework.Framework, appPath, nodeSecretName string, isBlock bool) error {
	opt := make(map[string]string)
	var (
		rbdImageName = "test-static-pv"
		pvName       = "pv-name"
		pvcName      = "pvc-name"
		namespace    = f.UniqueName
		// minikube creates default class in cluster, we need to set dummy
		// storageclass on PV and PVC to avoid storageclass name mismatch
		sc = "storage-class"
	)

	c := f.ClientSet
	mons, err := getMons(rookNamespace, c)
	if err != nil {
		return fmt.Errorf("failed to get mons: %w", err)
	}
	mon := strings.Join(mons, ",")
	size := staticPVSize
	// create rbd image
	cmd := fmt.Sprintf(
		"rbd create %s --size=%d --image-feature=layering %s",
		rbdImageName,
		4096,
		rbdOptions(defaultRBDPool))

	_, e, err := execCommandInToolBoxPod(f, cmd, rookNamespace)
	if err != nil {
		return err
	}
	if e != "" {
		return fmt.Errorf("failed to create rbd image %s", e)
	}
	if nodeSecretName == "" {
		nodeSecretName = rbdNodePluginSecretName
	}

	opt["migration"] = "true"
	opt["clusterID"] = getMonsHash(mon)
	opt["imageFeatures"] = staticPVImageFeature
	opt["pool"] = defaultRBDPool
	opt["staticVolume"] = strconv.FormatBool(true)
	opt["imageName"] = rbdImageName
	pv := getStaticPV(
		pvName,
		rbdImageName,
		size,
		nodeSecretName,
		cephCSINamespace,
		sc,
		"rbd.csi.ceph.com",
		isBlock,
		opt, nil, retainPolicy)

	_, err = c.CoreV1().PersistentVolumes().Create(context.TODO(), pv, metav1.CreateOptions{})
	if err != nil {
		return fmt.Errorf("PV Create API error: %w", err)
	}

	pvc := getStaticPVC(pvcName, pvName, size, namespace, sc, isBlock)

	_, err = c.CoreV1().PersistentVolumeClaims(pvc.Namespace).Create(context.TODO(), pvc, metav1.CreateOptions{})
	if err != nil {
		return fmt.Errorf("PVC Create API error: %w", err)
	}
	// bind pvc to app
	app, err := loadApp(appPath)
	if err != nil {
		return err
	}

	app.Namespace = namespace
	app.Spec.Volumes[0].PersistentVolumeClaim.ClaimName = pvcName
	err = createApp(f.ClientSet, app, deployTimeout)
	if err != nil {
		return err
	}

	err = deletePod(app.Name, app.Namespace, f.ClientSet, deployTimeout)
	if err != nil {
		return err
	}

	err = c.CoreV1().PersistentVolumeClaims(pvc.Namespace).Delete(context.TODO(), pvc.Name, metav1.DeleteOptions{})
	if err != nil {
		return fmt.Errorf("failed to delete pvc: %w", err)
	}

	err = c.CoreV1().PersistentVolumes().Delete(context.TODO(), pv.Name, metav1.DeleteOptions{})
	if err != nil {
		return fmt.Errorf("failed to delete pv: %w", err)
	}

	cmd = fmt.Sprintf("rbd rm %s %s", rbdImageName, rbdOptions(defaultRBDPool))
	_, _, err = execCommandInToolBoxPod(f, cmd, rookNamespace)

	return err
}

// nolint:gocyclo,cyclop // reduce complexity
func validateCephFsStaticPV(f *framework.Framework, appPath, scPath string) error {
	opt := make(map[string]string)
	var (
		cephFsVolName = "testSubVol"
		groupName     = "testGroup"
		fsName        = "myfs"
		pvName        = "pv-name"
		pvcName       = "pvc-name"
		namespace     = f.UniqueName
		// minikube creates default storage class in cluster, we need to set dummy
		// storageclass on PV and PVC to avoid storageclass name mismatch
		sc         = "storage-class"
		secretName = "cephfs-static-pv-sc" // #nosec
	)

	c := f.ClientSet

	listOpt := metav1.ListOptions{
		LabelSelector: "app=rook-ceph-tools",
	}

	fsID, e, err := execCommandInPod(f, "ceph fsid", rookNamespace, &listOpt)
	if err != nil {
		return err
	}
	if e != "" {
		return fmt.Errorf("failed to get fsid from ceph cluster %s", e)
	}
	// remove new line present in fsID
	fsID = strings.Trim(fsID, "\n")

	// 4GiB in bytes
	size := "4294967296"

	// create subvolumegroup, command will work even if group is already present.
	cmd := fmt.Sprintf("ceph fs subvolumegroup create %s %s", fsName, groupName)

	_, e, err = execCommandInPod(f, cmd, rookNamespace, &listOpt)
	if err != nil {
		return err
	}
	if e != "" {
		return fmt.Errorf("failed to create subvolumegroup: %s", e)
	}

	// create subvolume
	cmd = fmt.Sprintf("ceph fs subvolume create %s %s %s --size %s", fsName, cephFsVolName, groupName, size)
	_, e, err = execCommandInPod(f, cmd, rookNamespace, &listOpt)
	if err != nil {
		return err
	}
	if e != "" {
		return fmt.Errorf("failed to create subvolume: %s", e)
	}

	// get rootpath
	cmd = fmt.Sprintf("ceph fs subvolume getpath %s %s %s", fsName, cephFsVolName, groupName)
	rootPath, e, err := execCommandInPod(f, cmd, rookNamespace, &listOpt)
	if err != nil {
		return err
	}
	if e != "" {
		return fmt.Errorf("failed to get rootpath %s", e)
	}
	// remove new line present in rootPath
	rootPath = strings.Trim(rootPath, "\n")

	// create secret
	secret, err := getSecret(scPath)
	if err != nil {
		return err
	}
	adminKey, e, err := execCommandInPod(f, "ceph auth get-key client.admin", rookNamespace, &listOpt)
	if err != nil {
		return err
	}
	if e != "" {
		return fmt.Errorf("failed to get adminKey %s", e)
	}
	secret.StringData["userID"] = adminUser
	secret.StringData["userKey"] = adminKey
	secret.Name = secretName
	secret.Namespace = cephCSINamespace
	_, err = c.CoreV1().Secrets(cephCSINamespace).Create(context.TODO(), &secret, metav1.CreateOptions{})
	if err != nil {
		return fmt.Errorf("failed to create secret: %w", err)
	}

	opt["clusterID"] = fsID
	opt["fsName"] = fsName
	opt["staticVolume"] = strconv.FormatBool(true)
	opt["rootPath"] = rootPath
	pv := getStaticPV(
		pvName,
		pvName,
		staticPVSize,
		secretName,
		cephCSINamespace,
		sc,
		"cephfs.csi.ceph.com",
		false,
		opt,
		nil,
		retainPolicy)
	_, err = c.CoreV1().PersistentVolumes().Create(context.TODO(), pv, metav1.CreateOptions{})
	if err != nil {
		return fmt.Errorf("failed to create PV: %w", err)
	}

	pvc := getStaticPVC(pvcName, pvName, size, namespace, sc, false)
	_, err = c.CoreV1().PersistentVolumeClaims(pvc.Namespace).Create(context.TODO(), pvc, metav1.CreateOptions{})
	if err != nil {
		return fmt.Errorf("failed to create PVC: %w", err)
	}
	// bind pvc to app
	app, err := loadApp(appPath)
	if err != nil {
		return fmt.Errorf("failed to load app: %w", err)
	}

	app.Namespace = namespace
	app.Spec.Volumes[0].PersistentVolumeClaim.ClaimName = pvcName
	err = createApp(f.ClientSet, app, deployTimeout)
	if err != nil {
		return fmt.Errorf("failed to create pod: %w", err)
	}

	err = deletePod(app.Name, namespace, f.ClientSet, deployTimeout)
	if err != nil {
		return fmt.Errorf("failed to delete pod: %w", err)
	}

	err = c.CoreV1().PersistentVolumeClaims(pvc.Namespace).Delete(context.TODO(), pvc.Name, metav1.DeleteOptions{})
	if err != nil {
		return fmt.Errorf("failed to delete pvc: %w", err)
	}

	err = c.CoreV1().PersistentVolumes().Delete(context.TODO(), pv.Name, metav1.DeleteOptions{})
	if err != nil {
		return fmt.Errorf("failed to delete pv: %w", err)
	}

	err = c.CoreV1().Secrets(cephCSINamespace).Delete(context.TODO(), secret.Name, metav1.DeleteOptions{})
	if err != nil {
		return fmt.Errorf("failed to delete secret: %w", err)
	}

	// delete subvolume
	cmd = fmt.Sprintf("ceph fs subvolume rm %s %s %s", fsName, cephFsVolName, groupName)
	_, e, err = execCommandInPod(f, cmd, rookNamespace, &listOpt)
	if err != nil {
		return err
	}
	if e != "" {
		return fmt.Errorf("failed to remove sub-volume %s", e)
	}

	// delete subvolume group
	cmd = fmt.Sprintf("ceph fs subvolumegroup rm %s %s", fsName, groupName)
	_, e, err = execCommandInPod(f, cmd, rookNamespace, &listOpt)
	if err != nil {
		return err
	}
	if e != "" {
		return fmt.Errorf("failed to remove subvolume group %s", e)
	}

	return nil
}

func validateRBDStaticResize(
	f *framework.Framework,
	app *v1.Pod,
	appOpt *metav1.ListOptions,
	pvc *v1.PersistentVolumeClaim,
	rbdImageName string) error {
	// resize rbd image
	size := staticPVNewSize
	cmd := fmt.Sprintf(
		"rbd resize %s --size=%s %s",
		rbdImageName,
		size,
		rbdOptions(defaultRBDPool))

	_, _, err := execCommandInToolBoxPod(f, cmd, rookNamespace)
	if err != nil {
		return err
	}
	err = createApp(f.ClientSet, app, deployTimeout)
	if err != nil {
		return err
	}
	// check size for the filesystem type PVC
	if *pvc.Spec.VolumeMode == v1.PersistentVolumeFilesystem {
		err = checkDirSize(app, f, appOpt, size)
		if err != nil {
			return err
		}
	}

	return deletePod(app.Name, app.Namespace, f.ClientSet, deployTimeout)
}