package registrymirror

import (
	"encoding/json"

	corev1 "k8s.io/api/core/v1"

	"github.com/aws/eks-anywhere-packages/ecrtokenrefresher/pkg/constants"
	k8s "github.com/aws/eks-anywhere-packages/ecrtokenrefresher/pkg/kubernetes"
	"github.com/aws/eks-anywhere-packages/ecrtokenrefresher/pkg/secrets"
	"github.com/aws/eks-anywhere-packages/ecrtokenrefresher/pkg/secrets/common"
	"github.com/aws/eks-anywhere-packages/ecrtokenrefresher/pkg/utils"
)

const (
	endpointKey = "ENDPOINT"
	usernameKey = "USERNAME"
	passwordKey = "PASSWORD"
	caKey       = "CACERTCONTENT"
	insecureKey = "INSECURE"
	credName    = "registry-mirror-cred"
	secretName  = "registry-mirror-secret"
)

type RegistryMirrorSecret struct {
	credName           string
	mgmtClusterName    string
	clientSets         secrets.ClusterClientSet
	clusterCredentials secrets.ClusterCredential
}

var _ secrets.Secret = (*RegistryMirrorSecret)(nil)

func (mirror *RegistryMirrorSecret) Init(mgmtClusterName string, clientSets secrets.ClusterClientSet) error {
	var err error
	mirror.credName = credName
	mirror.mgmtClusterName = mgmtClusterName
	mirror.clientSets = clientSets
	mirror.clusterCredentials, err = mirror.GetClusterCredentials(mirror.clientSets)
	return err
}

func (mirror *RegistryMirrorSecret) IsActive() bool {
	return len(mirror.clusterCredentials) > 0
}

func (mirror *RegistryMirrorSecret) GetName() string {
	return mirror.credName
}

func (mirror *RegistryMirrorSecret) GetClusterCredentials(clientSets secrets.ClusterClientSet) (secrets.ClusterCredential, error) {
	clusterCredentials := make(secrets.ClusterCredential)
	defaultClientSet := mirror.clientSets[mirror.mgmtClusterName]
	for clusterName := range clientSets {
		utils.InfoLogger.Printf("fetching registry mirror auth data for cluster %s...\n", clusterName)
		namespace := constants.PackagesNamespace
		if clusterName != mirror.mgmtClusterName {
			namespace = constants.NamespacePrefix + clusterName
		}
		secret, err := k8s.GetSecret(defaultClientSet, secretName, namespace)
		if err == nil {
			credential := &secrets.Credential{
				Registry: string(secret.Data[endpointKey]),
				Username: string(secret.Data[usernameKey]),
				Password: string(secret.Data[passwordKey]),
				CA:       string(secret.Data[caKey]),
				Insecure: string(secret.Data[insecureKey]),
			}
			if credential.Registry != "" && credential.Username != "" && credential.Password != "" {
				clusterCredentials[clusterName] = []*secrets.Credential{credential}
				utils.InfoLogger.Println("success.")
			} else {
				utils.InfoLogger.Println("empty credential.")
			}
		} else {
			utils.ErrorLogger.Println(err)
			return nil, err
		}
	}
	return clusterCredentials, nil
}

func (mirror *RegistryMirrorSecret) BroadcastCredentials() error {
	defaultClientSet := mirror.clientSets[mirror.mgmtClusterName]
	data := make(map[string][]byte)
	for clusterName, creds := range mirror.clusterCredentials {
		dockerConfig := common.CreateDockerAuthConfig(creds)
		configJson, err := json.Marshal(*dockerConfig)
		if err != nil {
			return err
		}
		common.BroadcastDockerAuthConfig(configJson, defaultClientSet, mirror.clientSets[clusterName], mirror.credName, clusterName)

		if clusterName == mirror.mgmtClusterName {
			data[corev1.DockerConfigJsonKey] = configJson
		}
		data[clusterName+"_ca.crt"] = []byte(creds[0].CA)
		data["config.json"] = configJson
		if creds[0].Insecure == "true" {
			data[clusterName+"_insecure"] = []byte(creds[0].Insecure)
		}
	}
	// create a registry mirror secret for package controller pod to mount
	if _, ok := data[corev1.DockerConfigJsonKey]; !ok {
		configJson, _ := json.Marshal(common.CreateDockerAuthConfig([]*secrets.Credential{{
			Registry: "", Username: "", Password: "", CA: "", Insecure: "",
		}}))
		data[corev1.DockerConfigJsonKey] = configJson
	}
	secret, _ := k8s.GetSecret(defaultClientSet, credName, constants.PackagesNamespace)
	if secret == nil {
		_, err := k8s.CreateSecret(defaultClientSet, credName, constants.PackagesNamespace, data)
		if err != nil {
			return err
		}
	} else {
		_, err := k8s.UpdateSecret(defaultClientSet, constants.PackagesNamespace, secret, data)
		if err != nil {
			return err
		}
	}
	return nil
}