/*
Copyright 2021 The Flux 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 controller

import (
	"context"
	"fmt"
	"testing"
	"time"

	"github.com/fluxcd/pkg/apis/meta"
	"github.com/fluxcd/pkg/testserver"
	sourcev1 "github.com/fluxcd/source-controller/api/v1"
	. "github.com/onsi/gomega"
	apimeta "k8s.io/apimachinery/pkg/api/meta"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/types"
	"sigs.k8s.io/controller-runtime/pkg/client"

	kustomizev1 "github.com/fluxcd/kustomize-controller/api/v1"
)

func TestKustomizationReconciler_DependsOn(t *testing.T) {
	g := NewWithT(t)
	id := "dep-" + randStringRunes(5)
	revision := "v1.0.0"

	err := createNamespace(id)
	g.Expect(err).NotTo(HaveOccurred(), "failed to create test namespace")

	err = createKubeConfigSecret(id)
	g.Expect(err).NotTo(HaveOccurred(), "failed to create kubeconfig secret")

	manifests := func(name string, data string) []testserver.File {
		return []testserver.File{
			{
				Name: "config.yaml",
				Body: fmt.Sprintf(`---
apiVersion: v1
kind: ConfigMap
metadata:
  name: %[1]s
data:
  key: "%[2]s"
---
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: "v2-%[1]s"
  namespace: "%[2]s"
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: test
  minReplicas: 1
  maxReplicas: 10
  metrics:
  - type: Resource
    resource:
      name: cpu
      target:
        type: Utilization
        averageUtilization: 50
  - type: Pods
    pods:
      metric:
        name: packets-per-second
      target:
        type: AverageValue
        averageValue: 1k
  - type: Object
    object:
      metric:
        name: requests-per-second
      describedObject:
        apiVersion: networking.k8s.io/v1beta1
        kind: Ingress
        name: main-route
      target:
        type: Value
        value: 10k
`, name, data),
			},
		}
	}

	artifact, err := testServer.ArtifactFromFiles(manifests(id, id))
	g.Expect(err).NotTo(HaveOccurred())

	repositoryName := types.NamespacedName{
		Name:      fmt.Sprintf("dep-%s", randStringRunes(5)),
		Namespace: id,
	}

	kustomizationKey := types.NamespacedName{
		Name:      fmt.Sprintf("dep-%s", randStringRunes(5)),
		Namespace: id,
	}
	kustomization := &kustomizev1.Kustomization{
		ObjectMeta: metav1.ObjectMeta{
			Name:      kustomizationKey.Name,
			Namespace: kustomizationKey.Namespace,
		},
		Spec: kustomizev1.KustomizationSpec{
			Interval: metav1.Duration{Duration: reconciliationInterval},
			Path:     "./",
			KubeConfig: &meta.KubeConfigReference{
				SecretRef: meta.SecretKeyReference{
					Name: "kubeconfig",
				},
			},
			SourceRef: kustomizev1.CrossNamespaceSourceReference{
				Name:      repositoryName.Name,
				Namespace: repositoryName.Namespace,
				Kind:      sourcev1.GitRepositoryKind,
			},
			TargetNamespace: id,
			Prune:           true,
		},
	}

	g.Expect(k8sClient.Create(context.Background(), kustomization)).To(Succeed())

	resultK := &kustomizev1.Kustomization{}

	g.Eventually(func() bool {
		_ = k8sClient.Get(context.Background(), client.ObjectKeyFromObject(kustomization), resultK)
		return apimeta.FindStatusCondition(resultK.Status.Conditions, meta.ReadyCondition) != nil
	}, timeout, time.Second).Should(BeTrue())

	t.Run("fails due to source not found", func(t *testing.T) {
		g := NewWithT(t)
		g.Eventually(func() bool {
			_ = k8sClient.Get(context.Background(), client.ObjectKeyFromObject(kustomization), resultK)
			ready := apimeta.FindStatusCondition(resultK.Status.Conditions, meta.ReadyCondition)
			return ready.Reason == meta.ArtifactFailedReason
		}, timeout, time.Second).Should(BeTrue())
	})

	t.Run("reconciles when source is found", func(t *testing.T) {
		g := NewWithT(t)
		err = applyGitRepository(repositoryName, artifact, revision)
		g.Expect(err).NotTo(HaveOccurred())

		g.Eventually(func() bool {
			_ = k8sClient.Get(context.Background(), client.ObjectKeyFromObject(kustomization), resultK)
			ready := apimeta.FindStatusCondition(resultK.Status.Conditions, meta.ReadyCondition)
			return ready.Reason == meta.ReconciliationSucceededReason
		}, timeout, time.Second).Should(BeTrue())
	})

	t.Run("fails due to dependency not found", func(t *testing.T) {
		g := NewWithT(t)
		g.Eventually(func() error {
			_ = k8sClient.Get(context.Background(), client.ObjectKeyFromObject(kustomization), resultK)
			resultK.Spec.DependsOn = []meta.NamespacedObjectReference{
				{
					Namespace: id,
					Name:      "root",
				},
			}
			return k8sClient.Update(context.Background(), resultK)
		}, timeout, time.Second).Should(BeNil())

		g.Eventually(func() bool {
			_ = k8sClient.Get(context.Background(), client.ObjectKeyFromObject(kustomization), resultK)
			ready := apimeta.FindStatusCondition(resultK.Status.Conditions, meta.ReadyCondition)
			return ready.Reason == meta.DependencyNotReadyReason
		}, timeout, time.Second).Should(BeTrue())
	})
}