// Package logic is the message send and history use-case layer.
package logic

import (
	"context"

	"spark-server/internal/module/message/entity"
)

type Repository interface {
	Create(ctx context.Context, message *entity.Message) error
	GetByID(ctx context.Context, id int64) (*entity.Message, error)
	GetByClientMsgID(ctx context.Context, senderID, conversationID int64, clientMsgID string) (*entity.Message, error)
	ListByConversation(ctx context.Context, conversationID, lastMsgID int64, limit int) ([]*entity.Message, error)
}

type SendRequest struct {
	ConversationID int64
	SenderID       int64
	DeviceID       uint64
	ClientMsgID    string
	MsgID          int64
	Content        *entity.Content
}

type SendResponse struct {
	MsgID        int64
	ClientMsgID  string
	ServerTimeMS int64
}

// Service owns persist + enqueue. SEND_ACK happens only after both succeed.
type Service interface {
	GenerateMsgID(ctx context.Context) (int64, error)
	SendMessage(ctx context.Context, req *SendRequest) (*SendResponse, error)
}