package com.tenwa.reckon.util;

import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;

import com.tenwa.reckon.bean.ConditionBean;

	

/**
 * 
 * @author SHIHONGFEI
 * @version 1.0
 * @copyright (C) TENWA 2011
 * @date 2011-2-17
 * @desc ( 租金值计算工具类)
 */
public class RentTools {

	/**
	 * 用于计算每一期的租金
	 * 
	 * @param Rate
	 * @param Nper
	 * @param Pv
	 * @param Fv
	 * @param Type
	 * @return
	 */
	public static String getPMT(String Rate, String Nper, String Pv, String Fv, String Type) {

		// 参数说明：Pv=现值，Nper=期数，Rate=利率(注意同期数周期一致，且要求已经包括百分号的数值！如0.05)
		// Fv=未来值，Type=数字 1或 0，用以指定各期的付款时间是在期初还是期末
		Rate = Rate.equals("") ? "0" : Rate;
		Nper = Nper.equals("") ? "0" : Nper;
		Pv = Pv.equals("") ? "0" : Pv;
		Fv = Fv.equals("") ? "0" : Fv;
		Type = Type.equals("") ? "0" : Type;

		if (Double.parseDouble(Nper) == 0) {
			return "0";
		}
		if (Double.parseDouble(Rate) == 0) {
			// divide(xxxxx,2, BigDecimal.ROUND_HALF_EVEN)
			return ((new BigDecimal(Pv).add(new BigDecimal(Fv)).multiply(new BigDecimal("-1")).divide(new BigDecimal(Nper), 20, BigDecimal.ROUND_HALF_UP))).toString();
		}

		BigDecimal Pv_B = new BigDecimal(Pv);
		// BigDecimal Nper_B = new BigDecimal(Nper);
		BigDecimal Rate_B = new BigDecimal(Rate);
		BigDecimal Fv_B = new BigDecimal(Fv);
		BigDecimal Type_B = new BigDecimal(Type);
		BigDecimal pmt_B = new BigDecimal("0");
		BigDecimal num1_B = new BigDecimal("1");
		BigDecimal numfu1_B = new BigDecimal("-1");
		int Nper_i = Integer.valueOf(Nper).intValue();
		try {
			pmt_B = numfu1_B.multiply(Rate_B).multiply(Pv_B.multiply((num1_B.add(Rate_B)).pow(Nper_i)).add(Fv_B)).divide((num1_B.add(Rate_B.multiply(Type_B))).multiply((num1_B.add(Rate_B)).pow(Nper_i).subtract(num1_B)), 10, BigDecimal.ROUND_HALF_UP);
			return pmt_B.toString().equals("") ? "0" : pmt_B.setScale(2, BigDecimal.ROUND_HALF_UP).toString();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return "0";
	}
	/**
	 * 等额租金 日利率算 租金
	 * @param dateList 租金计划日期
	 * @param Rate		年利率
	 * @param Pv		融资额
	 * @param Fv		期末
	 * @param startDate	起租日
	 * @param grace		宽限期
	 * @return
	 */
	public static String getDayPmt(List<String> dateList,String Rate, String Pv, String Fv,String startDate,int grace){
		BigDecimal rate = new BigDecimal("".equals(Rate)?"0":Rate);
		BigDecimal tempInx = new BigDecimal(1);
		BigDecimal year = new BigDecimal(360);
		BigDecimal sumTemp = BigDecimal.ZERO;
		if(grace>0){
			startDate=dateList.get(grace-1);
		}
		for(int i=grace;i<dateList.size();i++){
			String planDate =dateList.get(i);
			Long dayDiff = DateTools.getDateDiff(planDate,startDate );
			startDate = planDate;
			BigDecimal issue = year.divide(year.add(rate.multiply(new BigDecimal(dayDiff))),20,BigDecimal.ROUND_HALF_UP);
			tempInx = tempInx.multiply(issue);
			
				sumTemp = sumTemp.add(tempInx);
			
		}
		BigDecimal rent = new BigDecimal(Pv).subtract(new BigDecimal(Fv)).divide(sumTemp,2,BigDecimal.ROUND_HALF_UP);
		return rent.toString();
	}
	
	/**
	 * pmt 得到租金list
	 * 
	 * @Title: getRentListByPmt
	 * @Description:
	 * @param
	 * @param rent
	 *            pmt 测算出的租金
	 * @param
	 * @param rent_list
	 *            期数
	 * @param
	 * @param rents
	 *            存放租金的list
	 * @param
	 * @return
	 * @return List<String> 租金list
	 * @throws
	 */
	public static List<String> getRentListByPmt(String rent, String rent_list, List<String> rents) {

		for (int i = 0; i < Integer.parseInt(rent_list); i++) {
			rents.add(rent);
		}
		return rents;
	}

	// /**
	// * 等额本金的租金列表
	// *
	// * @param l_corpus
	// * 本金列表
	// * @param l_inte
	// * 利息列表
	// * @return
	// */
	// @SuppressWarnings("unchecked")
	// public List getRentByEqCorpus(List l_corpus, List l_inte, String
	// rentScale,
	// String type) {
	// // 用于保存租金
	// List l_rent = new ArrayList();
	// for (int i = 0; i < l_corpus.size(); i++) {
	// String r = String.valueOf(Double.parseDouble(l_corpus.get(i)
	// .toString())
	// + Double.parseDouble(l_inte.get(i).toString()));
	// r = NumTools
	// .formatNumberDoubleScale(r, Integer.parseInt(rentScale));
	//
	// if (i == 0 && "1".equals(type)) {
	// r = l_corpus.get(i).toString();
	// }
	//
	// l_rent.add(r);
	// }
	// return l_rent;
	//
	// }

	/**
	 * 根据交易结构信息测算出新的租金
	 * 
	 * @Title: getRentByPmt
	 * @Description:
	 * @param
	 * @param mp租金测算信息
	 * @param
	 * @return
	 * @return String
	 * @throws
	 */
	public static String getRentByPmt(Map<String, String> mp) {

		String retu_vale = mp.get("retu_vale").toString();
		String rem_rent_list = mp.get("rem_rent_list").toString();
		String rem_corpus = mp.get("rem_corpus").toString();
		String period_type = mp.get("period_type").toString();
		String income_number_year = mp.get("income_number_year").toString();
		String if_retry = mp.get("if_retry").toString();
		String nominalprice = mp.get("nominalprice").toString();
		String rentScale = mp.get("rentScale").toString();

		// 得到每一期租金的利率
		retu_vale = RateTools.getPreRate(retu_vale, income_number_year);

		// 得到新的租金测算期次,由于宽限期不用于pmt的租金测算
		rem_rent_list = String.valueOf(Integer.parseInt(mp.get("rem_rent_list").toString()) - Integer.parseInt(mp.get("igrace").toString()));

		// 得到租金
		String rent = getPMT(retu_vale, rem_rent_list, "-" + rem_corpus, nominalprice, period_type);
		return NumTools.formatNumberDoubleScale(rent, Integer.parseInt(rentScale));
	}

	/**
	 * 
	 * ( 得到变更的租金列表下标值,并以数组返回)
	 * 
	 * @param l_rent_adjust
	 * @return
	 */
	public static String[] getAdjustIds(List<String> l_rent_adjust, int grace) {
		String id_s = "";
		for (int i = grace; i < l_rent_adjust.size(); i++) {
			String adjust = (String) l_rent_adjust.get(i);
			if (!adjust.equals("")) {// 当此期租金发生变更时
				id_s += i + ",";

			}
		}

		id_s = id_s.indexOf(",") > -1 ? id_s.substring(0, id_s.length() - 1) : id_s;
		if (id_s.equals("")) {
			return new String[0];
		} else {
			String[] i_array = id_s.split(",");// 得到租金变更的节点
			return i_array;
		}
	}

	/**
	 * 
	 * ( 得到不变的租金列表下标值,并以数组返回)
	 * 
	 * @param l_rent_adjust
	 * @return
	 */
	public static String[] getNoAdjustIds(List<String> l_rent_adjust, int grace) {
		String id_s = "";
		for (int i = grace; i < l_rent_adjust.size(); i++) {
			String adjust = (String) l_rent_adjust.get(i);
			if (adjust.equals("")) {// 当此期租金发生变更时
				id_s += i + ",";

			}
		}

		id_s = id_s.indexOf(",") > -1 ? id_s.substring(0, id_s.length() - 1) : id_s;

		if (id_s.equals("")) {
			return new String[0];
		} else {
			String[] i_array = id_s.split(",");// 得到租金变更的节点
			return i_array;
		}
	}

	/**
	 * @author SCLICX 默认金额的精度
	 * @return
	 */
	public static int getAccuracy() {
		return 2;
	}

	/**
	 * @author SCLICX 租金金额的精度
	 * @return
	 */
	public static int getRentAccuracy() {
		return 2;
	}

	/**
	 * @author SCLICX 本金金额的精度
	 * @return
	 */
	public static int getCorpusAccuracy() {
		return 2;
	}

	/**
	 * @author SCLICX 利息金额的精度
	 * @return
	 */
	public static int getInterestAccuracy() {
		return 2;
	}
}