package entity

import (
	"mayfly-go/pkg/runner"
	"time"
)

const (
	BinlogDownloadInterval = time.Minute * 15
)

// BinlogFile is the metadata of the MySQL binlog file.
type BinlogFile struct {
	Name       string
	RemoteSize int64
	LocalSize  int64

	// Sequence is parsed from Name and is for the sorting purpose.
	Sequence       int64
	FirstEventTime time.Time
	LastEventTime  time.Time

	Downloaded bool
}

var _ DbJob = (*DbBinlog)(nil)

// DbBinlog 数据库备份任务
type DbBinlog struct {
	DbJobBaseImpl
	DbInstanceId uint64 // 数据库实例ID
}

func NewDbBinlog(instanceId uint64) *DbBinlog {
	job := &DbBinlog{}
	job.Id = instanceId
	job.DbInstanceId = instanceId
	return job
}

func (b *DbBinlog) GetInstanceId() uint64 {
	return b.DbInstanceId
}

func (b *DbBinlog) GetDbName() string {
	// binlog 是全库级别的
	return ""
}

func (b *DbBinlog) Schedule() (time.Time, error) {
	switch b.LastStatus {
	case DbJobSuccess:
		return time.Time{}, runner.ErrJobFinished
	case DbJobFailed:
		return time.Now().Add(BinlogDownloadInterval), nil
	default:
		return time.Now(), nil
	}
}

func (b *DbBinlog) Update(_ runner.Job) {}

func (b *DbBinlog) IsEnabled() bool {
	return true
}

func (b *DbBinlog) IsExpired() bool {
	return false
}

func (b *DbBinlog) SetEnabled(_ bool, _ string) {}

func (b *DbBinlog) GetInterval() time.Duration {
	return 0
}

func (b *DbBinlog) GetJobType() DbJobType {
	return DbJobTypeBinlog
}

func (b *DbBinlog) GetKey() DbJobKey {
	return b.getKey(b.GetJobType())
}

func (b *DbBinlog) SetStatus(status DbJobStatus, err error) {
	b.setLastStatus(b.GetJobType(), status, err)
}