package chatcore

type SessionType string

const (
	SessionTypeGroup SessionType = "group"
	SessionTypeDM    SessionType = "dm"
)

type MessageType string

const (
	MessageTypeText   MessageType = "text"
	MessageTypeImage  MessageType = "image"
	MessageTypeSystem MessageType = "system"
)

type Session struct {
	Id            int64       `json:"id" bson:"_id"`
	Type          SessionType `json:"type" bson:"type"`
	Name          string      `json:"name" bson:"name"`
	CreatorId     int64       `json:"creatorId" bson:"creatorId"`
	Participants  []int64     `json:"participants" bson:"participants"`
	LastMessage   string      `json:"lastMessage" bson:"lastMessage"`
	LastMessageAt int64       `json:"lastMessageAt" bson:"lastMessageAt"`
	CreatedAt     int64       `json:"createdAt" bson:"createdAt"`
	UpdatedAt     int64       `json:"updatedAt" bson:"updatedAt"`
}

type Message struct {
	Id        int64       `json:"id" bson:"_id"`
	SessionId int64       `json:"sessionId" bson:"sessionId"`
	SenderId  int64       `json:"senderId" bson:"senderId"`
	Type      MessageType `json:"type" bson:"type"`
	Content   string      `json:"content" bson:"content"`
	CreatedAt int64       `json:"createdAt" bson:"createdAt"`
}

type Store interface {
	CreateSession(typ SessionType, name string, creatorId int64, participants []int64) (*Session, error)
	GetSession(id int64) (*Session, error)
	ListUserSessions(userId int64, page, limit int) []*Session
	AddParticipant(sessionId, userId int64) error
	RemoveParticipant(sessionId, userId int64) error
	DeleteSession(id int64)
	AddMessage(sessionId, senderId int64, msgType MessageType, content string) (*Message, error)
	GetMessages(sessionId int64, page, limit int) []*Message
}