// Copyright 2018 NetApp, Inc. All Rights Reserved.

package k8sclient

import (
	"fmt"
	"sort"

	appsv1 "k8s.io/api/apps/v1"
	"k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/api/errors"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/version"
	"k8s.io/apimachinery/pkg/watch"
	"k8s.io/client-go/rest"
)

type FakeKubeClient struct {
	version     *version.Info
	Deployments map[string]*appsv1.Deployment
	PVCs        map[string]*v1.PersistentVolumeClaim
	failMatrix  map[string]bool
}

func NewFakeKubeClientBasic(config *rest.Config, namespace string) (Interface, error) {
	return &FakeKubeClient{
		version: &version.Info{
			Major:      "1",
			Minor:      "8",
			GitVersion: "v1.8.0",
		},
		Deployments: make(map[string]*appsv1.Deployment, 0),
		PVCs:        make(map[string]*v1.PersistentVolumeClaim, 0),
		failMatrix:  make(map[string]bool, 0),
	}, nil
}

func NewFakeKubeClient(failMatrix map[string]bool, versionMajor, versionMinor string) *FakeKubeClient {
	return &FakeKubeClient{
		version: &version.Info{
			Major:      versionMajor,
			Minor:      versionMinor,
			GitVersion: "v" + versionMajor + "." + versionMinor + ".0",
		},
		Deployments: make(map[string]*appsv1.Deployment, 0),
		PVCs:        make(map[string]*v1.PersistentVolumeClaim, 0),
		failMatrix:  failMatrix,
	}
}

type FakeKubeClientState struct {
	Deployments []string
	PVCs        []string
}

func (k *FakeKubeClient) SnapshotState() *FakeKubeClientState {
	state := &FakeKubeClientState{
		Deployments: make([]string, 0),
		PVCs:        make([]string, 0),
	}
	for key := range k.Deployments {
		state.Deployments = append(state.Deployments, key)
	}
	sort.Strings(state.Deployments)
	for key := range k.PVCs {
		state.PVCs = append(state.PVCs, key)
	}
	sort.Strings(state.PVCs)
	return state
}

func (k *FakeKubeClient) Version() *version.Info {
	return k.version
}

func (k *FakeKubeClient) GetDeployment(deploymentName string,
	options metav1.GetOptions) (*appsv1.Deployment, error) {
	if fail, ok := k.failMatrix["GetDeployment"]; fail && ok {
		return nil, fmt.Errorf("GetDeployment failed")
	}
	if deployment, ok := k.Deployments[deploymentName]; ok {
		return deployment, nil
	}
	err := &errors.StatusError{}
	err.ErrStatus.Reason = metav1.StatusReasonNotFound
	return nil, err
}

func (k *FakeKubeClient) CheckDeploymentExists(deploymentName string) (bool, error) {
	var options metav1.GetOptions
	if _, err := k.GetDeployment(deploymentName, options); err != nil {
		if statusErr, ok := err.(*errors.StatusError); ok && statusErr.Status().Reason == metav1.StatusReasonNotFound {
			return false, nil
		}
		return false, err
	}
	return true, nil
}

func (k *FakeKubeClient) CreateDeployment(deployment *appsv1.Deployment) (*appsv1.Deployment, error) {
	if fail, ok := k.failMatrix["CreateDeployment"]; fail && ok {
		return deployment, fmt.Errorf("CreateDeployment failed")
	}
	k.Deployments[deployment.Name] = deployment
	return deployment, nil
}

func (k *FakeKubeClient) GetPod(podName string,
	options metav1.GetOptions) (*v1.Pod, error) {
	return nil, nil
}

func (k *FakeKubeClient) GetPodByLabels(listOptions *metav1.ListOptions) (*v1.Pod, error) {
	return nil, nil
}

func (k *FakeKubeClient) GetPodPhase(podName string,
	options metav1.GetOptions) (v1.PodPhase, error) {
	return v1.PodRunning, nil
}

func (k *FakeKubeClient) CheckPodExists(pod string) (bool, error) {
	return true, nil
}

func (k *FakeKubeClient) CreatePod(pod *v1.Pod) (*v1.Pod, error) {
	return nil, nil
}

func (k *FakeKubeClient) DeletePod(podName string, options *metav1.DeleteOptions) error {
	return nil
}

func (k *FakeKubeClient) WatchPod(listOptions *metav1.ListOptions) (watch.Interface, error) {
	return watch.NewEmptyWatch(), nil
}

func (k *FakeKubeClient) ListPod(listOptions *metav1.ListOptions) (*v1.PodList, error) {
	return nil, nil
}

func (k *FakeKubeClient) GetRunningPod(pod *v1.Pod, timeout *int64, labels map[string]string) (*v1.Pod, error) {
	return nil, nil
}

func (k *FakeKubeClient) GetPVC(pvcName string,
	options metav1.GetOptions) (*v1.PersistentVolumeClaim, error) {
	if fail, ok := k.failMatrix["GetPVC"]; fail && ok {
		return nil, fmt.Errorf("GetPVC failed")
	}
	if pvc, ok := k.PVCs[pvcName]; ok {
		return pvc, nil
	}
	err := &errors.StatusError{}
	err.ErrStatus.Reason = metav1.StatusReasonNotFound
	return nil, err
}

func (k *FakeKubeClient) GetPVCPhase(pvcName string,
	options metav1.GetOptions) (v1.PersistentVolumeClaimPhase, error) {
	pvc, err := k.GetPVC(pvcName, options)
	if err != nil {
		var phase v1.PersistentVolumeClaimPhase
		return phase, err
	}
	return pvc.Status.Phase, nil
}

func (k *FakeKubeClient) CheckPVCExists(pvc string) (bool, error) {
	var options metav1.GetOptions
	if _, err := k.GetPVC(pvc, options); err != nil {
		if statusErr, ok := err.(*errors.StatusError); ok && statusErr.Status().Reason == metav1.StatusReasonNotFound {
			return false, nil
		}
		return false, err
	}
	return true, nil
}

func (k *FakeKubeClient) CreatePVC(pvc *v1.PersistentVolumeClaim) (*v1.PersistentVolumeClaim, error) {
	if fail, ok := k.failMatrix["CreatePVC"]; fail && ok {
		return pvc, fmt.Errorf("CreatePVC failed")
	}
	k.PVCs[pvc.Name] = pvc
	return pvc, nil
}

func (k *FakeKubeClient) DeletePVC(pvcName string, options *metav1.DeleteOptions) error {
	return nil
}

func (k *FakeKubeClient) WatchPVC(listOptions *metav1.ListOptions) (watch.Interface, error) {
	return watch.NewEmptyWatch(), nil
}

func (k *FakeKubeClient) GetBoundPVC(pvc *v1.PersistentVolumeClaim,
	pv *v1.PersistentVolume, timeout *int64,
	labels map[string]string) (*v1.PersistentVolumeClaim, error) {
	return nil, nil
}

func (k *FakeKubeClient) CreatePV(pv *v1.PersistentVolume) (*v1.PersistentVolume, error) {
	return nil, nil
}

func (k *FakeKubeClient) DeletePV(pvName string, options *metav1.DeleteOptions) error {
	return nil
}

func (k *FakeKubeClient) CreateSecret(secret *v1.Secret) (*v1.Secret, error) {
	return nil, nil
}

func (k *FakeKubeClient) CreateCHAPSecret(secretName, accountName, initiatorSecret, targetSecret string) (*v1.Secret,
	error) {
	return nil, nil
}

func (k *FakeKubeClient) GetSecret(secretName string, options metav1.GetOptions) (*v1.Secret, error) {
	return nil, nil
}

func (k *FakeKubeClient) CheckSecretExists(secretName string) (bool, error) {
	return true, nil
}

func (k *FakeKubeClient) DeleteSecret(secretName string, options *metav1.DeleteOptions) error {
	return nil
}

func (k *FakeKubeClient) Namespace() string {
	return ""
}