package helper

import (
	"context"
	"reflect"
	"testing"

	discoveryv1 "k8s.io/api/discovery/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/labels"
	"k8s.io/utils/pointer"
	"sigs.k8s.io/controller-runtime/pkg/client"
	"sigs.k8s.io/controller-runtime/pkg/client/fake"

	"github.com/karmada-io/karmada/pkg/util/gclient"
)

func TestCreateOrUpdateEndpointSlice(t *testing.T) {
	type args struct {
		client        client.Client
		endpointSlice *discoveryv1.EndpointSlice
	}
	tests := []struct {
		name    string
		args    args
		want    *discoveryv1.EndpointSlice
		wantErr bool
	}{
		{
			name: "not exist and create",
			args: args{
				client: fake.NewClientBuilder().WithScheme(gclient.NewSchema()).Build(),
				endpointSlice: &discoveryv1.EndpointSlice{
					ObjectMeta: metav1.ObjectMeta{
						Name: "eps", Namespace: "ns",
						Labels: map[string]string{"foo": "foo1"},
					},
					AddressType: discoveryv1.AddressTypeIPv4,
					Endpoints: []discoveryv1.Endpoint{{
						Addresses: []string{"1.1.1.1"},
					}},
					Ports: []discoveryv1.EndpointPort{{
						Port: pointer.Int32(80),
					}},
				},
			},
			want: &discoveryv1.EndpointSlice{
				TypeMeta: metav1.TypeMeta{APIVersion: "discovery.k8s.io/v1", Kind: "EndpointSlice"},
				ObjectMeta: metav1.ObjectMeta{
					Name: "eps", Namespace: "ns",
					Labels: map[string]string{"foo": "foo1"},
				},
				AddressType: discoveryv1.AddressTypeIPv4,
				Endpoints: []discoveryv1.Endpoint{{
					Addresses:  []string{"1.1.1.1"},
					Conditions: discoveryv1.EndpointConditions{},
				}},
				Ports: []discoveryv1.EndpointPort{{
					Port: pointer.Int32(80),
				}},
			},
			wantErr: false,
		},
		{
			name: "exist and update",
			args: args{
				client: fake.NewClientBuilder().WithScheme(gclient.NewSchema()).WithObjects(
					&discoveryv1.EndpointSlice{ObjectMeta: metav1.ObjectMeta{Name: "eps", Namespace: "ns"}}).Build(),
				endpointSlice: &discoveryv1.EndpointSlice{
					ObjectMeta: metav1.ObjectMeta{
						Name: "eps", Namespace: "ns",
						Labels: map[string]string{"foo": "foo1"},
					},
					AddressType: discoveryv1.AddressTypeIPv4,
					Endpoints: []discoveryv1.Endpoint{{
						Addresses: []string{"1.1.1.1"},
					}},
					Ports: []discoveryv1.EndpointPort{{
						Port: pointer.Int32(80),
					}},
				},
			},
			want: &discoveryv1.EndpointSlice{
				TypeMeta: metav1.TypeMeta{APIVersion: "discovery.k8s.io/v1", Kind: "EndpointSlice"},
				ObjectMeta: metav1.ObjectMeta{
					Name: "eps", Namespace: "ns",
					Labels: map[string]string{"foo": "foo1"},
				},
				AddressType: discoveryv1.AddressTypeIPv4,
				Endpoints: []discoveryv1.Endpoint{{
					Addresses:  []string{"1.1.1.1"},
					Conditions: discoveryv1.EndpointConditions{},
				}},
				Ports: []discoveryv1.EndpointPort{{
					Port: pointer.Int32(80),
				}},
			},
			wantErr: false,
		},
		{
			name: "exist and not update",
			args: args{
				client: fake.NewClientBuilder().WithScheme(gclient.NewSchema()).WithObjects(
					&discoveryv1.EndpointSlice{
						ObjectMeta: metav1.ObjectMeta{
							Name: "eps", Namespace: "ns",
							Labels: map[string]string{"foo": "foo1"},
						},
						AddressType: discoveryv1.AddressTypeIPv4,
						Endpoints: []discoveryv1.Endpoint{{
							Addresses: []string{"1.1.1.1"},
						}},
						Ports: []discoveryv1.EndpointPort{{
							Port: pointer.Int32(80),
						}},
					}).Build(),
				endpointSlice: &discoveryv1.EndpointSlice{
					ObjectMeta: metav1.ObjectMeta{
						Name: "eps", Namespace: "ns",
						Labels: map[string]string{"foo": "foo1"},
					},
					AddressType: discoveryv1.AddressTypeIPv4,
					Endpoints: []discoveryv1.Endpoint{{
						Addresses: []string{"1.1.1.1"},
					}},
					Ports: []discoveryv1.EndpointPort{{
						Port: pointer.Int32(80),
					}},
				},
			},
			want: &discoveryv1.EndpointSlice{
				TypeMeta: metav1.TypeMeta{APIVersion: "discovery.k8s.io/v1", Kind: "EndpointSlice"},
				ObjectMeta: metav1.ObjectMeta{
					Name: "eps", Namespace: "ns",
					Labels: map[string]string{"foo": "foo1"},
				},
				AddressType: discoveryv1.AddressTypeIPv4,
				Endpoints: []discoveryv1.Endpoint{{
					Addresses:  []string{"1.1.1.1"},
					Conditions: discoveryv1.EndpointConditions{},
				}},
				Ports: []discoveryv1.EndpointPort{{
					Port: pointer.Int32(80),
				}},
			},
			wantErr: false,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if err := CreateOrUpdateEndpointSlice(tt.args.client, tt.args.endpointSlice); (err != nil) != tt.wantErr {
				t.Errorf("CreateOrUpdateEndpointSlice() error = %v, wantErr %v", err, tt.wantErr)
				return
			}
			got := &discoveryv1.EndpointSlice{}
			if err := tt.args.client.Get(context.TODO(), client.ObjectKey{Namespace: "ns", Name: "eps"}, got); err != nil {
				t.Error(err)
				return
			}
			got.ResourceVersion = ""
			if !reflect.DeepEqual(got, tt.want) {
				t.Errorf("CreateOrUpdateEndpointSlice() got = %#v, want %#v", got, tt.want)
			}
		})
	}
}

func TestDeleteEndpointSlice(t *testing.T) {
	type args struct {
		c        client.Client
		selector labels.Set
	}
	tests := []struct {
		name    string
		args    args
		wantErr bool
		want    []discoveryv1.EndpointSlice
	}{
		{
			name: "delete",
			args: args{
				c: fake.NewClientBuilder().WithScheme(gclient.NewSchema()).WithObjects(
					&discoveryv1.EndpointSlice{ObjectMeta: metav1.ObjectMeta{Name: "unmatched", Namespace: "ns"}},
					&discoveryv1.EndpointSlice{ObjectMeta: metav1.ObjectMeta{Name: "no_", Namespace: "ns", Labels: map[string]string{"foo": "foo1"}}},
				).Build(),
				selector: map[string]string{"foo": "foo1"},
			},
			wantErr: false,
			want: []discoveryv1.EndpointSlice{
				{ObjectMeta: metav1.ObjectMeta{Name: "unmatched", Namespace: "ns"}},
			},
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if err := DeleteEndpointSlice(tt.args.c, tt.args.selector); (err != nil) != tt.wantErr {
				t.Errorf("DeleteEndpointSlice() error = %v, wantErr %v", err, tt.wantErr)
			}
			list := &discoveryv1.EndpointSliceList{}
			if err := tt.args.c.List(context.TODO(), list); err != nil {
				t.Error(err)
				return
			}
			for i := range list.Items {
				list.Items[i].ResourceVersion = ""
			}
			if got := list.Items; !reflect.DeepEqual(got, tt.want) {
				t.Errorf("DeleteEndpointSlice() got = %#v, want %#v", got, tt.want)
			}
		})
	}
}