//go:build integration

/*
Copyright (c) Edgeless Systems GmbH

SPDX-License-Identifier: AGPL-3.0-only
*/

package controllers

import (
	"context"
	"path/filepath"
	"testing"
	"time"

	ctrl "sigs.k8s.io/controller-runtime"

	nodemaintenancev1beta1 "github.com/edgelesssys/constellation/v2/3rdparty/node-maintenance-operator/api/v1beta1"
	. "github.com/onsi/ginkgo/v2"
	. "github.com/onsi/gomega"
	appsv1 "k8s.io/api/apps/v1"
	corev1 "k8s.io/api/core/v1"
	"k8s.io/client-go/kubernetes/scheme"
	"k8s.io/client-go/rest"
	testclock "k8s.io/utils/clock/testing"
	"sigs.k8s.io/controller-runtime/pkg/client"
	"sigs.k8s.io/controller-runtime/pkg/envtest"
	logf "sigs.k8s.io/controller-runtime/pkg/log"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"

	updatev1alpha1 "github.com/edgelesssys/constellation/v2/operators/constellation-node-operator/v2/api/v1alpha1"
	//+kubebuilder:scaffold:imports
)

// These tests use Ginkgo (BDD-style Go testing framework). Refer to
// http://onsi.github.io/ginkgo/ to learn more about Ginkgo.

var (
	cfg       *rest.Config
	k8sClient client.Client
	testEnv   *envtest.Environment
	ctx       context.Context
	cancel    context.CancelFunc
	fakes     = newFakes()
)

func TestAPIs(t *testing.T) {
	RegisterFailHandler(Fail)
	suiteConfig, reporterConfig := GinkgoConfiguration()
	// If you want to debug a specific seed, set it here.
	// suiteConfig.RandomSeed = 1679587116
	reporterConfig.VeryVerbose = true
	RunSpecs(t, "Controller Suite", suiteConfig, reporterConfig)
}

var _ = BeforeSuite(func() {
	logf.SetLogger(zap.New(zap.WriteTo(GinkgoWriter), zap.UseDevMode(true)))
	ctx, cancel = context.WithCancel(context.Background())

	By("bootstrapping test environment")
	testEnv = &envtest.Environment{
		CRDDirectoryPaths: []string{
			filepath.Join("..", "config", "crd", "bases"),
			filepath.Join("..", "external", "github.com", "medik8s", "node-maintenance-operator", "config", "crd", "bases"),
		},
		ErrorIfCRDPathMissing: true,
	}

	var err error
	// cfg is defined in this file globally.
	cfg, err = testEnv.Start()
	Expect(err).NotTo(HaveOccurred())
	Expect(cfg).NotTo(BeNil())

	err = updatev1alpha1.AddToScheme(scheme.Scheme)
	Expect(err).NotTo(HaveOccurred())
	err = nodemaintenancev1beta1.AddToScheme(scheme.Scheme)
	Expect(err).NotTo(HaveOccurred())

	//+kubebuilder:scaffold:scheme

	k8sClient, err = client.New(cfg, client.Options{Scheme: scheme.Scheme})
	Expect(err).NotTo(HaveOccurred())
	Expect(k8sClient).NotTo(BeNil())

	k8sManager, err := ctrl.NewManager(cfg, ctrl.Options{
		Scheme: scheme.Scheme,
	})
	Expect(err).ToNot(HaveOccurred())

	err = (&AutoscalingStrategyReconciler{
		Client: k8sManager.GetClient(),
		Scheme: k8sManager.GetScheme(),
	}).SetupWithManager(k8sManager)
	Expect(err).ToNot(HaveOccurred())

	err = (&JoiningNodesReconciler{
		Client: k8sManager.GetClient(),
		Scheme: k8sManager.GetScheme(),
		Clock:  fakes.clock,
	}).SetupWithManager(k8sManager)
	Expect(err).ToNot(HaveOccurred())

	err = (&ScalingGroupReconciler{
		scalingGroupUpdater: fakes.scalingGroupUpdater,
		Client:              k8sManager.GetClient(),
		Scheme:              k8sManager.GetScheme(),
	}).SetupWithManager(k8sManager)
	Expect(err).ToNot(HaveOccurred())

	err = (&PendingNodeReconciler{
		nodeStateGetter: fakes.nodeStateGetter,
		Client:          k8sManager.GetClient(),
		Scheme:          k8sManager.GetScheme(),
		Clock:           fakes.clock,
	}).SetupWithManager(k8sManager)
	Expect(err).ToNot(HaveOccurred())

	err = (&NodeVersionReconciler{
		kubernetesServerVersionGetter: fakes.k8sVerGetter,
		nodeReplacer:                  fakes.nodeReplacer,
		Client:                        k8sManager.GetClient(),
		Scheme:                        k8sManager.GetScheme(),
	}).SetupWithManager(k8sManager)
	Expect(err).ToNot(HaveOccurred())

	go func() {
		defer GinkgoRecover()
		err = k8sManager.Start(ctx)
		Expect(err).ToNot(HaveOccurred(), "failed to run manager")
	}()
})

var _ = AfterSuite(func() {
	cancel()
	By("tearing down the test environment")
	err := testEnv.Stop()
	Expect(err).NotTo(HaveOccurred())
})

type fakeCollection struct {
	scalingGroupUpdater *fakeScalingGroupUpdater
	nodeStateGetter     *stubNodeStateGetter
	nodeReplacer        *stubNodeReplacer
	k8sVerGetter        *stubKubernetesServerVersionGetter
	clock               *testclock.FakeClock
}

func (c *fakeCollection) reset() {
	c.scalingGroupUpdater.reset()
	c.nodeStateGetter.setNodeState("")
	c.nodeReplacer.reset()
}

func newFakes() fakeCollection {
	return fakeCollection{
		scalingGroupUpdater: newFakeScalingGroupUpdater(),
		nodeStateGetter:     &stubNodeStateGetter{},
		nodeReplacer:        &stubNodeReplacer{},
		k8sVerGetter:        &stubKubernetesServerVersionGetter{},
		clock:               testclock.NewFakeClock(time.Now()),
	}
}

func resetEnv() error {
	// cleanup all nodes
	nodeList := &corev1.NodeList{}
	if err := k8sClient.List(context.Background(), nodeList); err != nil {
		return err
	}
	for _, node := range nodeList.Items {
		if err := k8sClient.Delete(context.Background(), &node); err != nil {
			return err
		}
	}
	// cleanup all node versions
	nodeVersionList := &updatev1alpha1.NodeVersionList{}
	if err := k8sClient.List(context.Background(), nodeVersionList); err != nil {
		return err
	}
	for _, nodeVersion := range nodeVersionList.Items {
		if err := k8sClient.Delete(context.Background(), &nodeVersion); err != nil {
			return err
		}
	}
	// cleanup all scaling groups
	scalingGroupList := &updatev1alpha1.ScalingGroupList{}
	if err := k8sClient.List(context.Background(), scalingGroupList); err != nil {
		return err
	}
	for _, scalingGroup := range scalingGroupList.Items {
		if err := k8sClient.Delete(context.Background(), &scalingGroup); err != nil {
			return err
		}
	}
	// cleanup all pending nodes
	pendingNodeList := &updatev1alpha1.PendingNodeList{}
	if err := k8sClient.List(context.Background(), pendingNodeList); err != nil {
		return err
	}
	for _, pendingNode := range pendingNodeList.Items {
		if err := k8sClient.Delete(context.Background(), &pendingNode); err != nil {
			return err
		}
	}
	// cleanup all joining nodes
	joiningNodeList := &updatev1alpha1.JoiningNodeList{}
	if err := k8sClient.List(context.Background(), joiningNodeList); err != nil {
		return err
	}
	for _, joiningNode := range joiningNodeList.Items {
		if err := k8sClient.Delete(context.Background(), &joiningNode); err != nil {
			return err
		}
	}
	// cleanup all autoscaling strategies
	autoscalingStrategyList := &updatev1alpha1.AutoscalingStrategyList{}
	if err := k8sClient.List(context.Background(), autoscalingStrategyList); err != nil {
		return err
	}
	for _, autoscalingStrategy := range autoscalingStrategyList.Items {
		if err := k8sClient.Delete(context.Background(), &autoscalingStrategy); err != nil {
			return err
		}
	}
	// cleanup all deployments
	deploymentList := &appsv1.DeploymentList{}
	if err := k8sClient.List(context.Background(), deploymentList); err != nil {
		return err
	}
	for _, deployment := range deploymentList.Items {
		if err := k8sClient.Delete(context.Background(), &deployment); err != nil {
			return err
		}
	}
	fakes.reset()
	return nil
}