package com.***.***.utils;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.stereotype.Component;

import system.Decimal;

import java.math.BigDecimal;

@Component

public class RoundCalculationUtil {

    @Value("${***.round.calculation}")

    private String calculationWay;

    public BigDecimal reCalculateAmount(BigDecimal amount){

        if(calculationWay.equals("currencyround")){

            return currencyRound(amount);

        }else {

            return round(amount);

        }

    }

    public BigDecimal round(BigDecimal amount) {

        BigDecimal result = amount.setScale(0, BigDecimal.ROUND_DOWN);

        BigDecimal lastRound2 = amount.setScale(2, BigDecimal.ROUND_DOWN).subtract(result);

        if (lastRound2.compareTo(new BigDecimal("0.50")) >= 0) {

            result = result.add(new BigDecimal("1"));

        }

        return result;

    }

    public BigDecimal currencyRound(BigDecimal amount){

        BigDecimal result = amount.setScale(2,BigDecimal.ROUND_DOWN);

        BigDecimal firstRound4=amount.setScale(4,BigDecimal.ROUND_DOWN);

        BigDecimal lastRound2=firstRound4.subtract(firstRound4.setScale(2,BigDecimal.ROUND_DOWN));

        if(lastRound2.compareTo(new BigDecimal("0.0005"))>=0){

            result=result.add(new BigDecimal("0.01"));

        }

        return result;

    }

}

@Autowired

    RoundCalculationUtil roundCalculationUtil;

    @RequestMapping(value = "/roundtest", method = RequestMethod.GET)

    public ResponseData<String> roundTest(@RequestParam(value = "amount", required = true, defaultValue = "100.1111") BigDecimal amount,

             @RequestParam(value = "roundcalculation", required = false, defaultValue = "currencyround") String roundcalculation) {

        try {

            BigDecimal result=roundCalculationUtil.reCalculateAmount(amount);

            //BigDecimal result=new RoundCalculationUtil ().reCalculateAmount(amount);//will get null from .properties file

            DecimalFormat df = new DecimalFormat("0.00");

            return new ResponseData(NotificationMsg.SUCCESS, df.format(result));

        } catch (Exception e) {

            logger.error(e);

            return new ResponseData(NotificationMsg.FAILED, e);

        }

    }