// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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 ilm

import (
	"github.com/elastic/beats/libbeat/beat"
	"github.com/elastic/beats/libbeat/common"
)

type noopSupport struct{}
type noopManager struct{}

// NewNoopSupport creates a noop ILM implementation with ILM support being always
// disabled.  Attempts to install a policy or create a write alias will fail.
func NewNoopSupport(info beat.Info, config *common.Config) (Supporter, error) {
	return (*noopSupport)(nil), nil
}

func (*noopSupport) Mode() Mode                      { return ModeDisabled }
func (*noopSupport) Alias() Alias                    { return Alias{} }
func (*noopSupport) Policy() Policy                  { return Policy{} }
func (*noopSupport) Overwrite() bool                 { return false }
func (*noopSupport) Manager(_ ClientHandler) Manager { return (*noopManager)(nil) }

func (*noopManager) CheckEnabled() (bool, error)       { return false, nil }
func (*noopManager) EnsureAlias() error                { return errOf(ErrOpNotAvailable) }
func (*noopManager) EnsurePolicy(_ bool) (bool, error) { return false, errOf(ErrOpNotAvailable) }
