// File generated by the kubebuilder framework:
// https://github.com/kubernetes-sigs/kubebuilder

/*
Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.

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 webhook

import (
	"context"
	"crypto/tls"
	"fmt"
	"net"
	"path/filepath"
	"testing"
	"time"

	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"

	"k8s.io/client-go/kubernetes"
	"k8s.io/client-go/kubernetes/scheme"
	ctrl "sigs.k8s.io/controller-runtime"
	"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"
	"sigs.k8s.io/controller-runtime/pkg/webhook"

	opsv1 "github.com/aws/zone-aware-controllers-for-k8s/api/v1"
	"github.com/aws/zone-aware-controllers-for-k8s/pkg/test"
	//+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 (
	k8sClient  client.Client
	kubeClient *kubernetes.Clientset
	testEnv    *envtest.Environment
	ctx        context.Context
	cancel     context.CancelFunc
	testUtils  test.Utils
)

func TestAPIs(t *testing.T) {
	RegisterFailHandler(Fail)
	RunSpecs(t, "Webhook Suite")
}

var _ = BeforeSuite(func() {
	logf.SetLogger(zap.New(zap.WriteTo(GinkgoWriter), zap.UseDevMode(true)))

	ctx, cancel = context.WithCancel(context.TODO())

	By("bootstrapping test environment")
	testEnv = &envtest.Environment{
		CRDDirectoryPaths:     []string{filepath.Join("..", "config", "crd", "bases")},
		ErrorIfCRDPathMissing: true,
		WebhookInstallOptions: envtest.WebhookInstallOptions{
			Paths: []string{filepath.Join("..", "config", "webhook")},
		},
	}

	cfg, err := testEnv.Start()
	Expect(err).NotTo(HaveOccurred())
	Expect(cfg).NotTo(BeNil())

	err = opsv1.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())

	kubeClient, err = kubernetes.NewForConfig(cfg)
	Expect(err).NotTo(HaveOccurred())
	Expect(kubeClient).NotTo(BeNil())

	testUtils = test.Utils{
		Ctx:    ctx,
		Client: k8sClient,
	}

	// start webhook server using Manager
	webhookInstallOptions := &testEnv.WebhookInstallOptions
	mgr, err := ctrl.NewManager(cfg, ctrl.Options{
		Scheme:             scheme.Scheme,
		Host:               webhookInstallOptions.LocalServingHost,
		Port:               webhookInstallOptions.LocalServingPort,
		CertDir:            webhookInstallOptions.LocalServingCertDir,
		LeaderElection:     false,
		MetricsBindAddress: "0",
	})
	Expect(err).NotTo(HaveOccurred())

	hookServer := mgr.GetWebhookServer()
	hookServer.Register("/pod-eviction-v1", &webhook.Admission{Handler: &PodEvictionHandler{
		Client: mgr.GetClient(),
		Logger: ctrl.Log.WithName("eviction-webhook"),
	}})

	//+kubebuilder:scaffold:webhook

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

	// wait for the webhook server to get ready
	dialer := &net.Dialer{Timeout: time.Second}
	addrPort := fmt.Sprintf("%s:%d", webhookInstallOptions.LocalServingHost, webhookInstallOptions.LocalServingPort)
	Eventually(func() error {
		conn, err := tls.DialWithDialer(dialer, "tcp", addrPort, &tls.Config{InsecureSkipVerify: true})
		if err != nil {
			return err
		}
		conn.Close()
		return nil
	}).Should(Succeed())

}, 60)

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