// Copyright (c) 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 app

import (
	"os"

	fleetagentservicecmd "github.com/javamachr/gardener-extension-shoot-fleet-agent/pkg/cmd"

	controllercmd "github.com/gardener/gardener/extensions/pkg/controller/cmd"
)

// ExtensionName is the name of the extension.
const ExtensionName = "extension-shoot-fleet-agent"

// Options holds configuration passed to the Fleet Service controller.
type Options struct {
	fleetOptions       *fleetagentservicecmd.FleetServiceOptions
	restOptions        *controllercmd.RESTOptions
	managerOptions     *controllercmd.ManagerOptions
	controllerOptions  *controllercmd.ControllerOptions
	healthOptions      *controllercmd.ControllerOptions
	controllerSwitches *controllercmd.SwitchOptions
	reconcileOptions   *controllercmd.ReconcilerOptions
	optionAggregator   controllercmd.OptionAggregator
}

// NewOptions creates a new Options instance.
func NewOptions() *Options {
	options := &Options{
		fleetOptions: &fleetagentservicecmd.FleetServiceOptions{},
		restOptions:  &controllercmd.RESTOptions{},
		managerOptions: &controllercmd.ManagerOptions{
			// These are default values.
			LeaderElection:          true,
			LeaderElectionID:        controllercmd.LeaderElectionNameID(ExtensionName),
			LeaderElectionNamespace: os.Getenv("LEADER_ELECTION_NAMESPACE"),
		},
		controllerOptions: &controllercmd.ControllerOptions{
			// This is a default value.
			MaxConcurrentReconciles: 5,
		},
		healthOptions: &controllercmd.ControllerOptions{
			// This is a default value.
			MaxConcurrentReconciles: 5,
		},
		controllerSwitches: fleetagentservicecmd.ControllerSwitches(),
		reconcileOptions:   &controllercmd.ReconcilerOptions{},
	}

	options.optionAggregator = controllercmd.NewOptionAggregator(
		options.restOptions,
		options.managerOptions,
		options.controllerOptions,
		options.fleetOptions,
		controllercmd.PrefixOption("healthcheck-", options.healthOptions),
		options.controllerSwitches,
		options.reconcileOptions,
	)

	return options
}
