/*
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package kubernetes

import (
	"context"
	"errors"
	"reflect"
	"testing"

	"github.com/stretchr/testify/assert"
	corev1 "k8s.io/api/core/v1"
	apierrors "k8s.io/apimachinery/pkg/api/errors"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime/schema"

	esv1beta1 "github.com/external-secrets/external-secrets/apis/externalsecrets/v1beta1"
)

const (
	errSomethingWentWrong = "Something went wrong"
)

type fakeClient struct {
	t                   *testing.T
	secretMap           map[string]corev1.Secret
	expectedListOptions metav1.ListOptions
	err                 error
}

func (fk fakeClient) Get(ctx context.Context, name string, opts metav1.GetOptions) (*corev1.Secret, error) {
	secret, ok := fk.secretMap[name]

	if !ok {
		return nil, errors.New(errSomethingWentWrong)
	}
	return &secret, fk.err
}

func (fk fakeClient) List(ctx context.Context, opts metav1.ListOptions) (*corev1.SecretList, error) {
	assert.Equal(fk.t, fk.expectedListOptions, opts)
	list := &corev1.SecretList{}
	for _, v := range fk.secretMap {
		list.Items = append(list.Items, v)
	}
	return list, nil
}

func TestGetSecret(t *testing.T) {
	type fields struct {
		Client       KClient
		ReviewClient RClient
		Namespace    string
	}
	tests := []struct {
		name   string
		fields fields
		ref    esv1beta1.ExternalSecretDataRemoteRef

		want    []byte
		wantErr bool
	}{
		{
			name: "secretNotFound",
			fields: fields{
				Client: fakeClient{
					t: t,
					secretMap: map[string]corev1.Secret{
						"mysec": {
							Data: map[string][]byte{
								"token": []byte(`foobar`),
							},
						},
					},
					err: apierrors.NewNotFound(schema.GroupResource{Group: "", Resource: "Secret"}, "secret"),
				},
				Namespace: "default",
			},
			ref: esv1beta1.ExternalSecretDataRemoteRef{
				Key:      "mysec",
				Property: "token",
			},
			wantErr: true,
		},
		{
			name: "err GetSecretMap",
			fields: fields{
				Client: fakeClient{
					t:         t,
					secretMap: map[string]corev1.Secret{},
				},
				Namespace: "default",
			},
			ref: esv1beta1.ExternalSecretDataRemoteRef{
				Key:      "mysec",
				Property: "token",
			},
			wantErr: true,
		},
		{
			name: "wrong property",
			fields: fields{
				Client: fakeClient{
					t: t,
					secretMap: map[string]corev1.Secret{
						"mysec": {
							Data: map[string][]byte{
								"token": []byte(`foobar`),
							},
						},
					},
				},
				Namespace: "default",
			},
			ref: esv1beta1.ExternalSecretDataRemoteRef{
				Key:      "mysec",
				Property: "not-the-token",
			},
			wantErr: true,
		},
		{
			name: "successful case",
			fields: fields{
				Client: fakeClient{
					t: t,
					secretMap: map[string]corev1.Secret{
						"mysec": {
							Data: map[string][]byte{
								"token": []byte(`foobar`),
							},
						},
					},
				},
				Namespace: "default",
			},
			ref: esv1beta1.ExternalSecretDataRemoteRef{
				Key:      "mysec",
				Property: "token",
			},
			want: []byte(`foobar`),
		},
		{
			name: "successful case without property",
			fields: fields{
				Client: fakeClient{
					t: t,
					secretMap: map[string]corev1.Secret{
						"mysec": {
							Data: map[string][]byte{
								"token": []byte(`foobar`),
							},
						},
					},
				},
				Namespace: "default",
			},
			ref: esv1beta1.ExternalSecretDataRemoteRef{
				Key: "mysec",
			},
			want: []byte(`{"token":"foobar"}`),
		},
		{
			name: "successful case metadata without property",
			fields: fields{
				Client: fakeClient{
					t: t,
					secretMap: map[string]corev1.Secret{
						"mysec": {
							ObjectMeta: metav1.ObjectMeta{
								Annotations: map[string]string{"date": "today"},
								Labels:      map[string]string{"dev": "seb"},
							},
						},
					},
				},
				Namespace: "default",
			},
			ref: esv1beta1.ExternalSecretDataRemoteRef{
				MetadataPolicy: esv1beta1.ExternalSecretMetadataPolicyFetch,
				Key:            "mysec",
			},
			want: []byte(`{"annotations":{"date":"today"},"labels":{"dev":"seb"}}`),
		},
		{
			name: "successful case metadata with single property",
			fields: fields{
				Client: fakeClient{
					t: t,
					secretMap: map[string]corev1.Secret{
						"mysec": {
							ObjectMeta: metav1.ObjectMeta{
								Annotations: map[string]string{"date": "today"},
								Labels:      map[string]string{"dev": "seb"},
							},
						},
					},
				},
				Namespace: "default",
			},
			ref: esv1beta1.ExternalSecretDataRemoteRef{
				MetadataPolicy: esv1beta1.ExternalSecretMetadataPolicyFetch,
				Key:            "mysec",
				Property:       "labels",
			},
			want: []byte(`{"dev":"seb"}`),
		},
		{
			name: "successful case metadata with multiple properties",
			fields: fields{
				Client: fakeClient{
					t: t,
					secretMap: map[string]corev1.Secret{
						"mysec": {
							ObjectMeta: metav1.ObjectMeta{
								Annotations: map[string]string{"date": "today"},
								Labels:      map[string]string{"dev": "seb"},
							},
						},
					},
				},
				Namespace: "default",
			},
			ref: esv1beta1.ExternalSecretDataRemoteRef{
				MetadataPolicy: esv1beta1.ExternalSecretMetadataPolicyFetch,
				Key:            "mysec",
				Property:       "labels.dev",
			},
			want: []byte(`seb`),
		},
		{
			name: "error case metadata with wrong property",
			fields: fields{
				Client: fakeClient{
					t: t,
					secretMap: map[string]corev1.Secret{
						"mysec": {
							ObjectMeta: metav1.ObjectMeta{
								Annotations: map[string]string{"date": "today"},
								Labels:      map[string]string{"dev": "seb"},
							},
						},
					},
				},
				Namespace: "default",
			},
			ref: esv1beta1.ExternalSecretDataRemoteRef{
				MetadataPolicy: esv1beta1.ExternalSecretMetadataPolicyFetch,
				Key:            "mysec",
				Property:       "foo",
			},
			wantErr: true,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			p := &Client{
				userSecretClient: tt.fields.Client,
				userReviewClient: tt.fields.ReviewClient,
				namespace:        tt.fields.Namespace,
			}
			got, err := p.GetSecret(context.Background(), tt.ref)
			if (err != nil) != tt.wantErr {
				t.Errorf("ProviderKubernetes.GetSecret() error = %v, wantErr %v", err, tt.wantErr)
				return
			}
			if !reflect.DeepEqual(got, tt.want) {
				t.Errorf("ProviderKubernetes.GetSecret() = %v, want %v", got, tt.want)
			}
		})
	}
}

func TestGetSecretMap(t *testing.T) {
	type fields struct {
		Client       KClient
		ReviewClient RClient
		Namespace    string
	}
	tests := []struct {
		name   string
		fields fields
		ref    esv1beta1.ExternalSecretDataRemoteRef

		want    map[string][]byte
		wantErr bool
	}{
		{
			name: "successful case metadata without property",
			fields: fields{
				Client: fakeClient{
					t: t,
					secretMap: map[string]corev1.Secret{
						"mysec": {
							ObjectMeta: metav1.ObjectMeta{
								Annotations: map[string]string{"date": "today"},
								Labels:      map[string]string{"dev": "seb"},
							},
						},
					},
				},
				Namespace: "default",
			},
			ref: esv1beta1.ExternalSecretDataRemoteRef{
				MetadataPolicy: esv1beta1.ExternalSecretMetadataPolicyFetch,
				Key:            "mysec",
			},
			want: map[string][]byte{"annotations": []byte("{\"date\":\"today\"}"), "labels": []byte("{\"dev\":\"seb\"}")},
		},
		{
			name: "successful case metadata with single property",
			fields: fields{
				Client: fakeClient{
					t: t,
					secretMap: map[string]corev1.Secret{
						"mysec": {
							ObjectMeta: metav1.ObjectMeta{
								Annotations: map[string]string{"date": "today"},
								Labels:      map[string]string{"dev": "seb"},
							},
						},
					},
				},
				Namespace: "default",
			},
			ref: esv1beta1.ExternalSecretDataRemoteRef{
				MetadataPolicy: esv1beta1.ExternalSecretMetadataPolicyFetch,
				Key:            "mysec",
				Property:       "labels",
			},
			want: map[string][]byte{"dev": []byte("\"seb\"")},
		},
		{
			name: "error case metadata with wrong property",
			fields: fields{
				Client: fakeClient{
					t: t,
					secretMap: map[string]corev1.Secret{
						"mysec": {
							ObjectMeta: metav1.ObjectMeta{
								Annotations: map[string]string{"date": "today"},
								Labels:      map[string]string{"dev": "seb"},
							},
						},
					},
				},
				Namespace: "default",
			},
			ref: esv1beta1.ExternalSecretDataRemoteRef{
				MetadataPolicy: esv1beta1.ExternalSecretMetadataPolicyFetch,
				Key:            "mysec",
				Property:       "foo",
			},
			wantErr: true,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			p := &Client{
				userSecretClient: tt.fields.Client,
				userReviewClient: tt.fields.ReviewClient,
				namespace:        tt.fields.Namespace,
			}
			got, err := p.GetSecretMap(context.Background(), tt.ref)
			if (err != nil) != tt.wantErr {
				t.Errorf("ProviderKubernetes.GetSecretMap() error = %v, wantErr %v", err, tt.wantErr)
				return
			}
			if !reflect.DeepEqual(got, tt.want) {
				t.Errorf("ProviderKubernetes.GetSecretMap() = %v, want %v", got, tt.want)
			}
		})
	}
}

func TestGetAllSecrets(t *testing.T) {
	type fields struct {
		Client       KClient
		ReviewClient RClient
		Namespace    string
	}
	type args struct {
		ctx context.Context
		ref esv1beta1.ExternalSecretFind
	}
	tests := []struct {
		name    string
		fields  fields
		args    args
		want    map[string][]byte
		wantErr bool
	}{
		{
			name: "use regex",
			fields: fields{
				Client: fakeClient{
					t: t,
					secretMap: map[string]corev1.Secret{
						"mysec": {
							ObjectMeta: metav1.ObjectMeta{
								Name: "mysec",
							},
							Data: map[string][]byte{
								"token": []byte(`foo`),
							},
						},
						"other": {
							ObjectMeta: metav1.ObjectMeta{
								Name: "other",
							},
							Data: map[string][]byte{
								"token": []byte(`bar`),
							},
						},
					},
				},
			},
			args: args{
				ref: esv1beta1.ExternalSecretFind{
					Name: &esv1beta1.FindName{
						RegExp: "other",
					},
				},
			},
			want: map[string][]byte{
				"other": []byte(`{"token":"bar"}`),
			},
		},
		{
			name: "use tags/labels",
			fields: fields{
				Client: fakeClient{
					t: t,
					expectedListOptions: metav1.ListOptions{
						LabelSelector: "app=foobar",
					},
					secretMap: map[string]corev1.Secret{
						"mysec": {
							ObjectMeta: metav1.ObjectMeta{
								Name: "mysec",
							},
							Data: map[string][]byte{
								"token": []byte(`foo`),
							},
						},
						"other": {
							ObjectMeta: metav1.ObjectMeta{
								Name: "other",
							},
							Data: map[string][]byte{
								"token": []byte(`bar`),
							},
						},
					},
				},
			},
			args: args{
				ref: esv1beta1.ExternalSecretFind{
					Tags: map[string]string{
						"app": "foobar",
					},
				},
			},
			want: map[string][]byte{
				"mysec": []byte(`{"token":"foo"}`),
				"other": []byte(`{"token":"bar"}`),
			},
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			p := &Client{
				userSecretClient: tt.fields.Client,
				userReviewClient: tt.fields.ReviewClient,
				namespace:        tt.fields.Namespace,
			}
			got, err := p.GetAllSecrets(tt.args.ctx, tt.args.ref)
			if (err != nil) != tt.wantErr {
				t.Errorf("ProviderKubernetes.GetAllSecrets() error = %v, wantErr %v", err, tt.wantErr)
				return
			}
			if !reflect.DeepEqual(got, tt.want) {
				t.Errorf("ProviderKubernetes.GetAllSecrets() = %v, want %v", got, tt.want)
			}
		})
	}
}
