// 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. A copy of the
// License is located at
//
//     http://aws.amazon.com/apache2.0/
//
// or in the "license" file accompanying this file. This file 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.

// The aws-node ipam daemon binary
package main

import (
	"os"

	"github.com/aws/amazon-vpc-cni-k8s/pkg/ipamd"
	"github.com/aws/amazon-vpc-cni-k8s/pkg/k8sapi"
	"github.com/aws/amazon-vpc-cni-k8s/pkg/utils/eventrecorder"
	"github.com/aws/amazon-vpc-cni-k8s/pkg/utils/logger"
	"github.com/aws/amazon-vpc-cni-k8s/pkg/version"
)

func main() {
	os.Exit(_main())
}

func _main() int {
	// Do not add anything before initializing logger
	log := logger.Get()

	log.Infof("Starting L-IPAMD %s  ...", version.Version)
	version.RegisterMetric()

	// Check API Server Connectivity
	if err := k8sapi.CheckAPIServerConnectivity(); err != nil {
		log.Errorf("Failed to check API server connectivity: %s", err)
		return 1
	}

	mapper, err := k8sapi.InitializeRestMapper()
	if err != nil {
		log.Errorf("Failed to initialize kube client mapper: %s", err)
		return 1
	}

	rawK8SClient, err := k8sapi.CreateKubeClient(mapper)
	if err != nil {
		log.Errorf("Failed to create kube client: %s", err)
		return 1
	}

	cachedK8SClient, err := k8sapi.CreateCachedKubeClient(rawK8SClient, mapper, true)
	if err != nil {
		log.Errorf("Failed to create cached kube client: %s", err)
		return 1
	}

	// Create EventRecorder for use by IPAMD
	if err := eventrecorder.Init(cachedK8SClient); err != nil {
		log.Errorf("Failed to create event recorder: %s", err)
		return 1
	}

	ipamContext, err := ipamd.New(rawK8SClient, cachedK8SClient)
	if err != nil {
		log.Errorf("Initialization failure: %v", err)
		return 1
	}

	// Pool manager
	go ipamContext.StartNodeIPPoolManager()

	// Prometheus metrics
	go ipamContext.ServeMetrics()

	// CNI introspection endpoints
	go ipamContext.ServeIntrospection()

	// Start the RPC listener
	err = ipamContext.RunRPCHandler(version.Version)
	if err != nil {
		log.Errorf("Failed to set up gRPC handler: %v", err)
		return 1
	}
	return 0
}