// Copyright 2022 The etcd 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 linearizability

import (
	"context"
	"math/rand"

	"go.etcd.io/etcd/tests/v3/framework/e2e"
)

var (
	KillFailpoint Failpoint = killFailpoint{}
)

type Failpoint interface {
	Trigger(ctx context.Context, clus *e2e.EtcdProcessCluster) error
}

type killFailpoint struct{}

func (f killFailpoint) Trigger(ctx context.Context, clus *e2e.EtcdProcessCluster) error {
	member := clus.Procs[rand.Int()%len(clus.Procs)]
	err := member.Kill()
	if err != nil {
		return err
	}
	err = member.Wait()
	if err != nil {
		return err
	}
	err = member.Start(ctx)
	if err != nil {
		return err
	}
	return nil
}