package com.amarsoft.aims.util;

import com.amarsoft.are.ARE;
import com.amarsoft.are.jbo.BizObject;
import com.amarsoft.are.jbo.BizObjectManager;
import com.amarsoft.are.jbo.JBOException;
import com.amarsoft.are.jbo.JBOFactory;
import com.amarsoft.are.lang.StringX;



/**
 * 汇率辅助处理工具类
 * @author syang
 * @date 2013-12-27
 */
public class ERateTool {
	/** 人民币币种常量 */
	public static final String CURRENCY_RMB = "01";
	/**
	 * 取任一两种币种间的汇率
	 * @param fromCurrency 原币种
	 * @param toCurrency 转换的目标币种
	 * @return
	 */
	public static double getERate(String fromCurrency,String toCurrency){
		if(StringX.isEmpty(fromCurrency)){
			ARE.getLog().error("汇率转换源币种为空");
			return 1.0;
		}
		if(StringX.isEmpty(toCurrency)){
			ARE.getLog().error("汇率转换目标币种为空");
			return 1.0;
		}
		
		if(fromCurrency.equals(toCurrency)){	//两个币种相同，直接返回1
			return 1.0;
		}
		double currencyFrom = 1.0;
		double currencyTo = 1.0;
		try {
			BizObjectManager bm = JBOFactory.getBizObjectManager("jbo.sys.ERATE_INFO");
			BizObject boFrom = bm.createQuery("Currency=:Currency").setParameter("Currency", fromCurrency).getSingleResult(false);
			BizObject boTo = bm.createQuery("Currency=:Currency").setParameter("Currency", toCurrency).getSingleResult(false);
			if(boFrom==null||boTo==null)return 1.0;
			currencyFrom = boFrom.getAttribute("ExchangeValue").getDouble();
			currencyTo = boTo.getAttribute("ExchangeValue").getDouble();
		} catch (JBOException e) {
			ARE.getLog().error("汇率获取错误：JBO读取错误");
		}
		
		return NumberAssistant.divided(currencyFrom, currencyTo);
	}
	
	/**
	 * 获取转换成人民币的汇率
	 * @param sCurrency
	 * @return
	 */
	public static double getERateRMB(String currency){
		return getERate(currency,CURRENCY_RMB);
	}
	
	/**
	 * 获取金额通过两个币种转换后的值
	 * @param sum 金额
	 * @param fromCurrency 原币种
	 * @param toCurrency 目标币种
	 * @return
	 */
	public static double getExchange(double sum,String fromCurrency,String toCurrency){
		return NumberAssistant.multiply(sum,getERate(fromCurrency,toCurrency));
	}

	/**
	 * 指定币种的金额转换为人民币后的金额
	 * @param sum 金额
	 * @param fromCurrency 原币种
	 * @return
	 */
	public static double getExchangeRMB(double sum,String fromCurrency){
		return getExchange(sum,fromCurrency,CURRENCY_RMB);
	}
	/**
	 * 人民币转换为本位币后的金额
	 * @param rmbSum 人民币金额
	 * @param baseCurrency 本位币币种
	 * @return
	 */
	public static double getRMBExchangeBase(double rmbSum,String baseCurrency){
		return getExchange(rmbSum,CURRENCY_RMB,baseCurrency);
	}
	
	
}