package livechat

import (
	"context"
	biz "kra/internal/biz/livechat"
	"kra/internal/service/dto"
)

type Service struct{ uc *biz.Usecase }

func NewService(uc *biz.Usecase) *Service { return &Service{uc: uc} }

func (s *Service) History(ctx context.Context, roomID uint, limit int) ([]*dto.LiveChatMessageResponse, error) {
	items, err := s.uc.ListRecent(ctx, roomID, limit)
	if err != nil {
		return nil, err
	}
	out := make([]*dto.LiveChatMessageResponse, 0, len(items))
	for _, item := range items {
		out = append(out, MessageResponse(item))
	}
	return out, nil
}

func MessageResponse(item *biz.Message) *dto.LiveChatMessageResponse {
	return &dto.LiveChatMessageResponse{ID: item.ID, RoomID: item.RoomID, Type: item.Type, UserID: item.UserID, Username: item.Username, Nickname: item.Nickname, Avatar: item.Avatar, Content: item.Content, GiftID: item.GiftID, GiftName: item.GiftName, GiftIcon: item.GiftIcon, Quantity: item.Quantity, DiamondTotal: item.DiamondTotal, CreatedAt: item.CreatedAt}
}