package entity

import "time"

const (
	RequestPending  RequestStatus = 1
	RequestAccepted RequestStatus = 2
	RequestRejected RequestStatus = 3
)

// RequestStatus is persisted as friend_requests.status and returned as apply `status`.
type RequestStatus int

func (s RequestStatus) Valid() bool {
	return s == RequestPending || s == RequestAccepted || s == RequestRejected
}

const (
	SourceUnknown Source = 0
	SourceQRCode  Source = 1
	SourceEmail   Source = 2
	SourceSparkID Source = 3
	SourceFollow  Source = 4
)

// Source is friend add origin on the request and the directed edge.
type Source int

func (s Source) Valid() bool {
	return s == SourceUnknown || s == SourceQRCode || s == SourceEmail || s == SourceSparkID || s == SourceFollow
}

const (
	ReasonMax = 128
	RemarkMax = 64
)

// Request is one from→to application. Repeats update this row; they do not insert another.
type Request struct {
	ID        int64
	FromUser  int64
	ToUser    int64
	Source    Source
	Reason    string
	Remark    string
	Status    RequestStatus
	CreatedAt time.Time
	UpdatedAt time.Time
}

func ValidSource(src int) bool {
	return Source(src).Valid() && Source(src) != SourceUnknown
}