// Copyright (c) 2017 VMware, Inc. 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.
// 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 gc

import (
	"github.com/vmware/harbor/src/common/registryctl"
	"github.com/vmware/harbor/src/jobservice/env"
	"github.com/vmware/harbor/src/jobservice/logger"
	"github.com/vmware/harbor/src/registryctl/client"
)

// GarbageCollector is the struct to run registry's garbage collection
type GarbageCollector struct {
	registryCtlClient client.Client
	logger            logger.Interface
}

// MaxFails implements the interface in job/Interface
func (gc *GarbageCollector) MaxFails() uint {
	return 1
}

// ShouldRetry implements the interface in job/Interface
func (gc *GarbageCollector) ShouldRetry() bool {
	return false
}

// Validate implements the interface in job/Interface
func (gc *GarbageCollector) Validate(params map[string]interface{}) error {
	return nil
}

// Run implements the interface in job/Interface
func (gc *GarbageCollector) Run(ctx env.JobContext, params map[string]interface{}) error {
	if err := gc.init(ctx); err != nil {
		return err
	}
	if err := gc.registryCtlClient.Health(); err != nil {
		gc.logger.Errorf("failed to start gc as regsitry controller is unreachable: %v", err)
		return err
	}
	gc.logger.Infof("start to run gc in job.")
	gcr, err := gc.registryCtlClient.StartGC()
	if err != nil {
		gc.logger.Errorf("failed to get gc result: %v", err)
		return err
	}
	gc.logger.Infof("GC results: status: %t, message: %s, start: %s, end: %s.", gcr.Status, gcr.Msg, gcr.StartTime, gcr.EndTime)
	gc.logger.Infof("success to run gc in job.")
	return nil
}

func (gc *GarbageCollector) init(ctx env.JobContext) error {
	registryctl.Init()
	gc.registryCtlClient = registryctl.RegistryCtlClient
	gc.logger = ctx.GetLogger()
	return nil
}