package com.qxueyou.scc.exam.dao;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

import com.qxueyou.scc.base.dao.BaseDAO;
import com.qxueyou.scc.base.service.ICacheService;

@Repository
public class ExamPaperSectionDAO extends BaseDAO{
	
	@Autowired
	ICacheService cacheService;
	
	public void deleteItem(String sectionId,List<String> exerciseIds) {
		for(String exerciseId:exerciseIds) {
			cacheService.lstRemove(getKey(sectionId), exerciseId);
		}
	}
	
	public void deleteSectionCache(String sectionId) {
		cacheService.delete(getKey(sectionId));
	}

	private String getKey(String sectionId) {
		return "lst_section_exerciseIds_"+sectionId;
	}
	
	public void addItem(String sectionId,List<String> exerciseIds) {
		for(String exerciseId:exerciseIds) {
			cacheService.lstRightPush(getKey(sectionId), exerciseId);
		}
	}
	
	public void addItem(String sectionId,String exerciseId) {
		cacheService.lstRightPush(getKey(sectionId), exerciseId);
	}
	
	@SuppressWarnings("unchecked")
	public List<String> getItems(String sectionId) {
		
		List<Object> ids = cacheService.lstAll(getKey(sectionId));
		
		if(ids==null) {
			return Collections.EMPTY_LIST;
		}
		
		List<String> result = new ArrayList<String>(ids.size());
		
		for(Object id:ids) {
			result.add((String)id);
		}
		return result;
	}
}