/*
Copyright 2020 The actions-runner-controller 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 main

import (
	"context"
	"flag"
	"fmt"
	"os"

	"github.com/google/go-github/v29/github"
	actionsv1alpha1 "github.com/summerwind/actions-runner-controller/api/v1alpha1"
	"github.com/summerwind/actions-runner-controller/controllers"
	"golang.org/x/oauth2"
	"k8s.io/apimachinery/pkg/runtime"
	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
	_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"
	// +kubebuilder:scaffold:imports
)

const (
	defaultRunnerImage = "summerwind/actions-runner:v2.165.2"
	defaultDockerImage = "docker:19.03.6-dind"
)

var (
	scheme   = runtime.NewScheme()
	setupLog = ctrl.Log.WithName("setup")
)

func init() {
	_ = clientgoscheme.AddToScheme(scheme)

	_ = actionsv1alpha1.AddToScheme(scheme)
	// +kubebuilder:scaffold:scheme
}

func main() {
	var (
		metricsAddr          string
		enableLeaderElection bool

		runnerImage string
		dockerImage string
		ghToken     string
	)

	flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
	flag.BoolVar(&enableLeaderElection, "enable-leader-election", false,
		"Enable leader election for controller manager. Enabling this will ensure there is only one active controller manager.")
	flag.StringVar(&runnerImage, "runner-image", defaultRunnerImage, "The image name of self-hosted runner container.")
	flag.StringVar(&dockerImage, "docker-image", defaultDockerImage, "The image name of docker sidecar container.")
	flag.StringVar(&ghToken, "github-token", "", "The access token of GitHub.")
	flag.Parse()

	if ghToken == "" {
		ghToken = os.Getenv("GITHUB_TOKEN")
	}
	if ghToken == "" {
		fmt.Fprintln(os.Stderr, "Error: GitHub access token must be specified.")
		os.Exit(1)
	}

	tc := oauth2.NewClient(context.Background(), oauth2.StaticTokenSource(
		&oauth2.Token{AccessToken: ghToken},
	))
	ghClient := github.NewClient(tc)

	ctrl.SetLogger(zap.New(func(o *zap.Options) {
		o.Development = true
	}))

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme:             scheme,
		MetricsBindAddress: metricsAddr,
		LeaderElection:     enableLeaderElection,
		Port:               9443,
	})
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}

	runnerReconciler := &controllers.RunnerReconciler{
		Client:       mgr.GetClient(),
		Log:          ctrl.Log.WithName("controllers").WithName("Runner"),
		Scheme:       mgr.GetScheme(),
		GitHubClient: ghClient,
		RunnerImage:  runnerImage,
		DockerImage:  dockerImage,
	}

	if err = runnerReconciler.SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "Runner")
		os.Exit(1)
	}

	runnerSetReconciler := &controllers.RunnerReplicaSetReconciler{
		Client: mgr.GetClient(),
		Log:    ctrl.Log.WithName("controllers").WithName("RunnerReplicaSet"),
		Scheme: mgr.GetScheme(),
	}

	if err = runnerSetReconciler.SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "RunnerReplicaSet")
		os.Exit(1)
	}

	runnerDeploymentReconciler := &controllers.RunnerDeploymentReconciler{
		Client: mgr.GetClient(),
		Log:    ctrl.Log.WithName("controllers").WithName("RunnerDeployment"),
		Scheme: mgr.GetScheme(),
	}

	if err = runnerDeploymentReconciler.SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "RunnerDeployment")
		os.Exit(1)
	}
	// +kubebuilder:scaffold:builder

	setupLog.Info("starting manager")
	if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
		setupLog.Error(err, "problem running manager")
		os.Exit(1)
	}
}