package usecase

import (
	"chat/internal/domain/entity"
	"context"
)

// MessageUseCase 定義訊息相關的業務邏輯介面
type MessageUseCase interface {
	// SendMessage 發送訊息
	SendMessage(ctx context.Context, roomID string, uid string, content string, clientMsgID string) error
	
	// ListMessages 查詢訊息列表（分頁）
	ListMessages(ctx context.Context, roomID string, uid string, pageSize int, pageIndex int) ([]entity.Message, int64, error)
}