// Copyright 2022 Chaos Mesh 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,
// See the License for the specific language governing permissions and
// limitations under the License.

package chaosd

import (
	"os/exec"

	"github.com/pingcap/log"
	"github.com/pkg/errors"
	"go.uber.org/zap"

	"github.com/chaos-mesh/chaosd/pkg/core"
)

type userDefinedAttack struct{}

var UserDefinedAttack AttackType = userDefinedAttack{}

func (userDefinedAttack) Attack(options core.AttackConfig, _ Environment) error {
	option := options.(*core.UserDefinedOption)
	log.Info("attack command", zap.String("command", option.AttackCmd))

	cmd := exec.Command("bash", "-c", option.AttackCmd)
	output, err := cmd.CombinedOutput()
	if err != nil {
		return errors.Wrap(err, string(output))
	}
	if len(output) > 0 {
		log.Info("attack command", zap.String("output", string(output)))
	}

	return nil
}

func (userDefinedAttack) Recover(exp core.Experiment, _ Environment) error {
	config, err := exp.GetRequestCommand()
	if err != nil {
		return err
	}
	option := config.(*core.UserDefinedOption)
	log.Info("recover command", zap.String("command", option.RecoverCmd))

	cmd := exec.Command("bash", "-c", option.RecoverCmd)
	output, err := cmd.CombinedOutput()
	if err != nil {
		return errors.Wrap(err, string(output))
	}
	if len(output) > 0 {
		log.Info("recover command", zap.String("command", option.RecoverCmd), zap.String("output", string(output)))
	}

	return nil
}
