/*

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 (
	"flag"
	"fmt"
	"net/http"
	"net/url"
	"os"

	"github.com/ory/hydra-maester/hydra"

	hydrav1alpha1 "github.com/ory/hydra-maester/api/v1alpha1"
	"github.com/ory/hydra-maester/controllers"
	apiv1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/runtime"
	_ "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
)

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

func init() {

	apiv1.AddToScheme(scheme)
	hydrav1alpha1.AddToScheme(scheme)
	// +kubebuilder:scaffold:scheme
}

func main() {
	var metricsAddr string
	var hydraURL string
	var port int
	var endpoint string
	var enableLeaderElection bool

	flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
	flag.StringVar(&hydraURL, "hydra-url", "", "The address of ORY Hydra")
	flag.IntVar(&port, "port", 4445, "Port ORY Hydra is listening on")
	flag.StringVar(&endpoint, "endpoint", "/clients", "ORY Hydra's client endpoint")
	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.Parse()

	ctrl.SetLogger(zap.Logger(true))

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

	if hydraURL == "" {
		setupLog.Error(fmt.Errorf("hydra service address can't be empty"), "unable to create controller", "controller", "OAuth2Client")
		os.Exit(1)
	}

	u, err := url.Parse(fmt.Sprintf("%s:%d", hydraURL, port))
	if err != nil {
		setupLog.Error(err, "unable to parse ORY Hydra's URL", "controller", "OAuth2Client")
		os.Exit(1)
	}

	err = (&controllers.OAuth2ClientReconciler{
		Client: mgr.GetClient(),
		Log:    ctrl.Log.WithName("controllers").WithName("OAuth2Client"),
		HydraClient: &hydra.Client{
			HydraURL:   *u.ResolveReference(&url.URL{Path: endpoint}),
			HTTPClient: &http.Client{},
		},
	}).SetupWithManager(mgr)
	if err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "OAuth2Client")
		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)
	}
}