/*
Copyright 2022 The Karmada Authors.

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 helper

import (
	"context"
	"testing"

	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
	"sigs.k8s.io/controller-runtime/pkg/client/fake"

	policyv1alpha1 "github.com/karmada-io/karmada/pkg/apis/policy/v1alpha1"
	karmadafake "github.com/karmada-io/karmada/pkg/generated/clientset/versioned/fake"
)

var Schema = runtime.NewScheme()

func init() {
	utilruntime.Must(karmadafake.AddToScheme(Schema))
}

func TestIsOverridePolicyExist(t *testing.T) {
	tests := []struct {
		name            string
		policyName      string
		policyNamespace string
		policyCreated   bool
		expected        bool
	}{
		{
			name:            "override policy exists",
			policyName:      "foo",
			policyNamespace: "bar",
			policyCreated:   true,
			expected:        true,
		},
		{
			name:            "override policy does not exist",
			policyName:      "foo",
			policyNamespace: "bar",
			policyCreated:   false,
			expected:        false,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			fakeClient := fake.NewClientBuilder().WithScheme(Schema).Build()
			if tt.policyCreated {
				testOverridePolicy := &policyv1alpha1.OverridePolicy{
					ObjectMeta: metav1.ObjectMeta{
						Namespace: tt.policyNamespace,
						Name:      tt.policyName,
					},
				}
				err := fakeClient.Create(context.TODO(), testOverridePolicy)
				if err != nil {
					t.Fatalf("failed to create overridePolicy, err is: %v", err)
				}
			}
			res, err := IsOverridePolicyExist(fakeClient, tt.policyNamespace, tt.policyName)
			if err != nil {
				t.Fatalf("failed to check overridePolicy exist, err is: %v", err)
			}
			if res != tt.expected {
				t.Errorf("IsOverridePolicyExist() = %v, want %v", res, tt.expected)
			}
		})
	}
}

func TestIsClusterOverridePolicyExist(t *testing.T) {
	tests := []struct {
		name          string
		policyName    string
		policyCreated bool
		expected      bool
	}{
		{
			name:          "cluster override policy exists",
			policyName:    "foo",
			policyCreated: true,
			expected:      true,
		},
		{
			name:          "cluster override policy does not exist",
			policyName:    "foo",
			policyCreated: false,
			expected:      false,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			fakeClient := fake.NewClientBuilder().WithScheme(Schema).Build()
			if tt.policyCreated {
				testClusterOverridePolicy := &policyv1alpha1.ClusterOverridePolicy{
					ObjectMeta: metav1.ObjectMeta{
						Name: tt.policyName,
					},
				}
				err := fakeClient.Create(context.TODO(), testClusterOverridePolicy)
				if err != nil {
					t.Fatalf("failed to create clusterOverridePolicy, err is: %v", err)
				}
			}
			res, err := IsClusterOverridePolicyExist(fakeClient, tt.policyName)
			if err != nil {
				t.Fatalf("failed to check clusterOverridePolicy exist, err is: %v", err)
			}
			if res != tt.expected {
				t.Errorf("IsClusterOverridePolicyExist() = %v, want %v", res, tt.expected)
			}
		})
	}
}