/*
Copyright 2017 The Kubernetes 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 sync

import (
	"fmt"
	"testing"

	pkgruntime "k8s.io/apimachinery/pkg/runtime"
	federationapi "k8s.io/kubernetes/federation/apis/federation/v1beta1"
	"k8s.io/kubernetes/federation/pkg/federatedtypes"
	"k8s.io/kubernetes/federation/pkg/federation-controller/util"
	fedtest "k8s.io/kubernetes/federation/pkg/federation-controller/util/test"
	apiv1 "k8s.io/kubernetes/pkg/api/v1"

	"github.com/stretchr/testify/require"
)

func TestClusterOperations(t *testing.T) {
	adapter := &federatedtypes.SecretAdapter{}
	obj := adapter.NewTestObject("foo")
	differingObj := adapter.Copy(obj)
	federatedtypes.SetAnnotation(adapter, differingObj, "foo", "bar")

	testCases := map[string]struct {
		clusterObject pkgruntime.Object
		expectedErr   bool
		operationType util.FederatedOperationType
	}{
		"Accessor error returned": {
			expectedErr: true,
		},
		"Missing cluster object should result in add operation": {
			operationType: util.OperationTypeAdd,
		},
		"Differing cluster object should result in update operation": {
			clusterObject: differingObj,
			operationType: util.OperationTypeUpdate,
		},
		"Matching cluster object should not result in an operation": {
			clusterObject: obj,
		},
	}
	for testName, testCase := range testCases {
		t.Run(testName, func(t *testing.T) {
			clusters := []*federationapi.Cluster{fedtest.NewCluster("cluster1", apiv1.ConditionTrue)}
			operations, err := clusterOperations(adapter, clusters, obj, "key", func(string) (interface{}, bool, error) {
				if testCase.expectedErr {
					return nil, false, fmt.Errorf("Not found!")
				}
				return testCase.clusterObject, (testCase.clusterObject != nil), nil
			})
			if testCase.expectedErr {
				require.Error(t, err, "An error was expected")
			} else {
				require.NoError(t, err, "An error was not expected")
			}
			if len(testCase.operationType) == 0 {
				require.True(t, len(operations) == 0, "An operation was not expected")
			} else {
				require.True(t, len(operations) == 1, "A single operation was expected")
				require.Equal(t, testCase.operationType, operations[0].Type, "Unexpected operation returned")
			}
		})
	}
}