/*
Copyright 2018 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 resource_test

import (
	"reflect"
	"testing"

	"sigs.k8s.io/kustomize/api/internal/loadertest"
	. "sigs.k8s.io/kustomize/api/resource"
	"sigs.k8s.io/kustomize/api/types"
)

func TestSliceFromPatches(t *testing.T) {

	patchGood1 := types.PatchStrategicMerge("patch1.yaml")
	patch1 := `
apiVersion: apps/v1
kind: Deployment
metadata:
  name: pooh
`
	patchGood2 := types.PatchStrategicMerge("patch2.yaml")
	patch2 := `
apiVersion: v1
kind: ConfigMap
metadata:
  name: winnie
  namespace: hundred-acre-wood
---
# some comment
---
---
`
	patchBad := types.PatchStrategicMerge("patch3.yaml")
	patch3 := `
WOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOT: woot
`
	patchList := types.PatchStrategicMerge("patch4.yaml")
	patch4 := `
apiVersion: v1
kind: List
items:
- apiVersion: apps/v1
  kind: Deployment
  metadata:
    name: pooh
- apiVersion: v1
  kind: ConfigMap
  metadata:
    name: winnie
    namespace: hundred-acre-wood
`
	patchList2 := types.PatchStrategicMerge("patch5.yaml")
	patch5 := `
apiVersion: v1
kind: DeploymentList
items:
- apiVersion: apps/v1
  kind: Deployment
  metadata:
    name: deployment-a
  spec: &hostAliases
    template:
      spec:
        hostAliases:
        - hostnames:
          - a.example.com
          ip: 8.8.8.8
- apiVersion: apps/v1
  kind: Deployment
  metadata:
    name: deployment-b
  spec:
    <<: *hostAliases
`
	patchList3 := types.PatchStrategicMerge("patch6.yaml")
	patch6 := `
apiVersion: v1
kind: List
items:
`
	patchList4 := types.PatchStrategicMerge("patch7.yaml")
	patch7 := `
apiVersion: v1
kind: List
`
	testDeploymentSpec := map[string]interface{}{
		"template": map[string]interface{}{
			"spec": map[string]interface{}{
				"hostAliases": []interface{}{
					map[string]interface{}{
						"hostnames": []interface{}{
							"a.example.com",
						},
						"ip": "8.8.8.8",
					},
				},
			},
		},
	}
	testDeploymentA := factory.FromMap(
		map[string]interface{}{
			"apiVersion": "apps/v1",
			"kind":       "Deployment",
			"metadata": map[string]interface{}{
				"name": "deployment-a",
			},
			"spec": testDeploymentSpec,
		})
	testDeploymentB := factory.FromMap(
		map[string]interface{}{
			"apiVersion": "apps/v1",
			"kind":       "Deployment",
			"metadata": map[string]interface{}{
				"name": "deployment-b",
			},
			"spec": testDeploymentSpec,
		})
	l := loadertest.NewFakeLoader("/")
	l.AddFile("/"+string(patchGood1), []byte(patch1))
	l.AddFile("/"+string(patchGood2), []byte(patch2))
	l.AddFile("/"+string(patchBad), []byte(patch3))
	l.AddFile("/"+string(patchList), []byte(patch4))
	l.AddFile("/"+string(patchList2), []byte(patch5))
	l.AddFile("/"+string(patchList3), []byte(patch6))
	l.AddFile("/"+string(patchList4), []byte(patch7))

	tests := []struct {
		name        string
		input       []types.PatchStrategicMerge
		expectedOut []*Resource
		expectedErr bool
	}{
		{
			name:        "happy",
			input:       []types.PatchStrategicMerge{patchGood1, patchGood2},
			expectedOut: []*Resource{testDeployment, testConfigMap},
			expectedErr: false,
		},
		{
			name:        "badFileName",
			input:       []types.PatchStrategicMerge{patchGood1, "doesNotExist"},
			expectedOut: []*Resource{},
			expectedErr: true,
		},
		{
			name:        "badData",
			input:       []types.PatchStrategicMerge{patchGood1, patchBad},
			expectedOut: []*Resource{},
			expectedErr: true,
		},
		{
			name:        "listOfPatches",
			input:       []types.PatchStrategicMerge{patchList},
			expectedOut: []*Resource{testDeployment, testConfigMap},
			expectedErr: false,
		},
		{
			name:        "listWithAnchorReference",
			input:       []types.PatchStrategicMerge{patchList2},
			expectedOut: []*Resource{testDeploymentA, testDeploymentB},
			expectedErr: false,
		},
		{
			name:        "listWithNoEntries",
			input:       []types.PatchStrategicMerge{patchList3},
			expectedOut: []*Resource{},
			expectedErr: false,
		},
		{
			name:        "listWithNo'items:'",
			input:       []types.PatchStrategicMerge{patchList4},
			expectedOut: []*Resource{},
			expectedErr: false,
		},
	}
	for _, test := range tests {
		rs, err := factory.SliceFromPatches(l, test.input)
		if test.expectedErr && err == nil {
			t.Fatalf("%v: should return error", test.name)
		}
		if !test.expectedErr && err != nil {
			t.Fatalf("%v: unexpected error: %s", test.name, err)
		}
		if len(rs) != len(test.expectedOut) {
			t.Fatalf("%s: length mismatch %d != %d",
				test.name, len(rs), len(test.expectedOut))
		}
		for i := range rs {
			if !reflect.DeepEqual(test.expectedOut[i], rs[i]) {
				t.Fatalf("%s: Got: %v\nexpected:%v",
					test.name, test.expectedOut[i], rs[i])
			}
		}
	}
}