// Copyright (c) 2022 Gitpod GmbH. All rights reserved.
// Licensed under the GNU Affero General Public License (AGPL).
// See License-AGPL.txt in the project root for license information.

package v1

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

	"github.com/gitpod-io/gitpod/common-go/util"
	. "github.com/onsi/ginkgo/v2"
	. "github.com/onsi/gomega"

	admissionv1beta1 "k8s.io/api/admission/v1beta1"
	//+kubebuilder:scaffold:imports
	"k8s.io/apimachinery/pkg/runtime"
	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"
	metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
	"sigs.k8s.io/controller-runtime/pkg/webhook"
)

// 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
var k8sClient client.Client
var testEnv *envtest.Environment
var ctx context.Context
var cancel context.CancelFunc

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())

	crdPath := filepath.Join("..", "..", "config", "crd", "bases")
	if !util.InLeewayBuild() {
		crdPath = filepath.Join("..", "..", "..", "..", "ws-manager-mk2", "config", "crd", "bases")
	}

	By("bootstrapping test environment")
	testEnv = &envtest.Environment{
		ControlPlaneStartTimeout: 1 * time.Minute,
		ControlPlaneStopTimeout:  1 * time.Minute,
		CRDDirectoryPaths:        []string{crdPath},
		ErrorIfCRDPathMissing:    false,
		WebhookInstallOptions: envtest.WebhookInstallOptions{
			Paths: []string{filepath.Join("..", "..", "config", "webhook")},
		},
	}

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

	scheme := runtime.NewScheme()
	err = AddToScheme(scheme)
	Expect(err).NotTo(HaveOccurred())

	err = admissionv1beta1.AddToScheme(scheme)
	Expect(err).NotTo(HaveOccurred())

	//+kubebuilder:scaffold:scheme

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

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

	err = (&Workspace{}).SetupWebhookWithManager(mgr)
	Expect(err).NotTo(HaveOccurred())

	//+kubebuilder:scaffold:webhook

	go func() {
		defer GinkgoRecover()
		err = mgr.Start(ctx)
		Expect(err).NotTo(HaveOccurred())
	}()

	// 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())

})

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