package policy.rule;

import foundation.dao.preload.Bucket;
import foundation.data.entity.Entity;
import foundation.data.entity.EntitySet;
import foundation.data.meta.MetaMonitor;
import foundation.data.meta.ReloadCheckResult;
import foundation.persist.NamedSQL;
import foundation.persist.SQLRunner;

public class RuleBucket extends Bucket<RuleMetas> {

	private static RuleBucket instance;
    private MetaMonitor monitor;
    
    
    private RuleBucket() {
    	monitor = new MetaMonitor("getOrderSettingLastUpdateTime");
    }

	public static synchronized RuleBucket getInstance() {
		if (instance != null) {
			return instance;
		}
		
		instance = new RuleBucket();
		return instance;
	}

	public static RuleRuntimes getRuleRuntimes(String buId) {
		getInstance();

		RuleMetas metas = instance.get(buId);
		RuleRuntimes result = metas.getCheckRuntimes();
		
		return result;
	}
	
	@Override
	public RuleMetas get(String buId) {
		try {
			monitor.setParam("parentId", buId);
			ReloadCheckResult checkResult = monitor.getReloadCheckResult(true);
			
			if (checkResult.isNeedReload()) {
				synchronized (this) {
					RuleMetas metas = super.get(buId);
				   	
					metas = loadOneBUCheckers(buId, metas);
				   	loadOne(buId, metas);
				   	
			        return metas;
				}
			}			
		}
		catch (Exception e) {
			e.printStackTrace();
		}
		
		return null;
	}

	private RuleMetas loadOneBUCheckers(String buId, RuleMetas metas) throws Exception {
		if (metas == null) {
			metas = new RuleMetas(buId);
		}
		else {
			metas.clear();
		}
		
		NamedSQL namedSQL = NamedSQL.getInstance("getOneBUCheckRules");
		namedSQL.setParam("buId", buId);
		EntitySet entitySet = SQLRunner.getEntitySet(namedSQL);
		
		RuleMeta meta;
		for (Entity entity: entitySet) {
			meta = new RuleMeta();
			meta.load(entity);
			
			metas.loadOne(meta);
		}
		
		return metas;
	}
}