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f(this)};e.clearTime=function(){return this.setHours(0,0,0,0)};e.toDate=function(){return new g(+this[0])};f.now=function(){return+new g};f.today=function(){return(new f).clearTime()};f.UTC=n;f.getDaysInMonth=E;if(typeof module!=="undefined"&&module.exports)module.exports=f;return f}(Date,Math,Array);(function(global){var SCALE=10;var ACCURACY=1.0E-8;var LOWER_BOUND=1.0E-10;var UPPER_BOUND=1000000.0;var AVAILABLE_INTEREST_RATES=[14.95]
var PRICE_MATRIX={"14.95":[3,4,6,9,12]}
var DEFAULT_INTEREST_RATE="14.95"
var AVAILABLE_DURATIONS=[3,4,6,9,12];var DURATION_BASED_INTEREST_RATES={"3":14.95,"4":14.95,"6":14.95,"9":14.95,"12":14.95};var MINIMUM_AMOUNT=150;var MAXIMUM_AMOUNT=6000;var DEFAULT_FULFILLMENT_DATE=payolutionXDate.today();var FIRST_DUE_OFFSET=21;var INTEREST_FREE_DAYS=0;var INTEREST_STRATEGY="DEFAULT";var FULFILLMENT_BASE="FULFILLMENT_END";var CALCULATED_AFTERWARDS=0;var InstallmentCalculator=function(originalAmount,duration,interestRate,currency,referenceDay){this.originalAmount=originalAmount;this.currency=currency;this.duration=duration;this.accuracy=ACCURACY;this.lowerBound=LOWER_BOUND;this.upperBound=UPPER_BOUND;this.interestRate=interestRate;this.minimum_amount=MINIMUM_AMOUNT;this.maximum_amount=MAXIMUM_AMOUNT;this.finalAmount=CALCULATED_AFTERWARDS;this.effectiveInterest=CALCULATED_AFTERWARDS;this.installments=[];this.daysToInstallments=[];this.interestDaysBetweenInstallments=[];this.referenceDay=referenceDay;this.interestStartDay=this.referenceDay.clone().addDays(INTEREST_FREE_DAYS);this.firstDueOffset=FIRST_DUE_OFFSET;this.defaultDueDayOfMonth=CALCULATED_AFTERWARDS;this.firstDueDate=CALCULATED_AFTERWARDS;}
InstallmentCalculator.prototype.calculate=function(){this.calculateDueDates();var installmentAmount=this.calculateInstallmentAmount();this.updateInstallments(installmentAmount);this.calculateEffectiveInterest();this.calculateFinalAmount();return{installmentAmount:installmentAmount,interestRate:this.interestRate,effectiveInterest:this.effectiveInterest,totalAmount:this.finalAmount,installments:this.installments}}
InstallmentCalculator.prototype.calculateDueDates=function(){this.setFirstDueDate();for(var i=0;i<this.duration;i++){this.installments.push({amount:CALCULATED_AFTERWARDS,dueDate:this.getNextDue(i)});this.daysToInstallments.push(this.referenceDay.diffDays(new payolutionXDate(this.installments[i].dueDate)));if(i==0){this.interestDaysBetweenInstallments.push(Math.max(0,this.interestStartDay.diffDays(new payolutionXDate(this.installments[i].dueDate))));}else{var baseDate=new payolutionXDate(Math.max(new payolutionXDate(this.installments[i-1].dueDate),this.interestStartDay));this.interestDaysBetweenInstallments.push(Math.max(0,baseDate.diffDays(new payolutionXDate(this.installments[i].dueDate))));}}}
InstallmentCalculator.prototype.setFirstDueDate=function(){this.firstDueDate=this.referenceDay.clone().addDays(this.firstDueOffset);this.setDefaultDueDayOfMonth();if(this.firstDueDate.getDate()>this.defaultDueDayOfMonth){this.firstDueDate.addMonths(1,true);}
var monthDays=payolutionXDate.getDaysInMonth(this.firstDueDate.getFullYear(),this.firstDueDate.getMonth());this.firstDueDate.setDate(Math.min(this.defaultDueDayOfMonth,monthDays));}
InstallmentCalculator.prototype.setDefaultDueDayOfMonth=function(){var day=this.firstDueDate.getDate();if(day>5&&day<=20){this.defaultDueDayOfMonth=20;}else{this.defaultDueDayOfMonth=5;}}
InstallmentCalculator.prototype.getNextDue=function(monthOffset){if(monthOffset==0){return this.firstDueDate.clone().toDate();}
var nextDueDate=this.firstDueDate.clone().addMonths(monthOffset,true);return nextDueDate.toDate();}
InstallmentCalculator.prototype.calculateBinarySearch=function(lowerBound,upperBound,result,resultScale,getErrorFunction){var error=getErrorFunction(result,this);for(var i=0;i<1000&&((Math.abs(error)-this.accuracy)>0);i++){if(error>0){upperBound=result;}else{lowerBound=result;}
result=upperBound-((upperBound-lowerBound)*0.5);error=getErrorFunction(result,this);}
return+result.toFixed(resultScale);}
InstallmentCalculator.prototype.getInstallmentAmountError=function(result,calculator){var current=calculator.originalAmount;for(var i=0;i<calculator.duration;i++){var interest=calculator.getInterest(current,i);current=current+interest-result;}
return(-1)*current;}
InstallmentCalculator.prototype.getEffectiveInterestError=function(result,calculator){var sum=0;for(var i=0;i<calculator.duration;i++){var days=calculator.daysToInstallments[i];var power=Math.pow(1+result,days/365);var multiplicand=1/power;var current=calculator.installments[i].amount*multiplicand;sum=sum+current;}
return calculator.originalAmount-sum;}
InstallmentCalculator.prototype.getInterest=function(amount,monthOffset){var perCentInterest=this.interestRate*0.01;var dailyInterest=perCentInterest/365;var duration=this.interestDaysBetweenInstallments[monthOffset];return amount*dailyInterest*duration;}
InstallmentCalculator.prototype.calculateInstallmentAmount=function(){var installmentAmount=this.calculateBinarySearch(this.lowerBound,this.originalAmount*10,this.fixedDivision(this.originalAmount,this.duration),2,this.getInstallmentAmountError);if(this.currency=='CHF'){installmentAmount=this.roundUpCHF(installmentAmount);}
return installmentAmount;}
InstallmentCalculator.prototype.roundUpCHF=function(installmentAmount){var temp=+installmentAmount*100;var rounding=5-(temp%5);var result=+installmentAmount+(rounding/100);return+result.toFixed(2);}
InstallmentCalculator.prototype.updateInstallments=function(installmentAmount){for(var i=0;i<this.duration-1;i++){this.installments[i].amount=installmentAmount;}
this.installments[this.duration-1].amount=this.getLastInstallmentAmount(installmentAmount);}
InstallmentCalculator.prototype.getLastInstallmentAmount=function(installmentAmount){if(this.interestRate>0){return installmentAmount;}
var total=installmentAmount*this.duration;var roundingDiff=total-this.originalAmount;return installmentAmount-roundingDiff;}
InstallmentCalculator.prototype.calculateEffectiveInterest=function(){if(this.interestRate<=0){this.effectiveInterest=0;return;}
var effectiveInterest=this.calculateBinarySearch(this.lowerBound,this.upperBound,this.interestRate*0.01,4,this.getEffectiveInterestError);this.effectiveInterest=effectiveInterest*100;this.effectiveInterest=+this.effectiveInterest.toFixed(2);}
InstallmentCalculator.prototype.calculateFinalAmount=function(){this.finalAmount=0;for(var i=0;i<this.duration;i++){this.finalAmount=this.finalAmount+this.installments[i].amount;}
this.finalAmount=+this.finalAmount.toFixed(2);}
InstallmentCalculator.prototype.fixedDivision=function(divident,divisor){var division=divident/divisor;return+division.toFixed(2);}
function contains(array,object){for(var i=0;i<array.length;i++){if(array[i]==object){return true;}}
return false;}
function getDefaultInterestRate(duration){if(INTEREST_STRATEGY=="MATRIX_BASED"){return DEFAULT_INTEREST_RATE;}
return DURATION_BASED_INTEREST_RATES[duration];}
function getReferenceDay(fulfillmentStart,fulfillmentEnd){if(FULFILLMENT_BASE=="FULFILLMENT_START"){return fulfillmentStart;}
return fulfillmentEnd;}
function isNullOrUndefined(value){if(typeof value=="undefined"||value==null){return true;}
return false;}
function calculate(amount,duration,interestRate,currency,fulfillmentStart,fulfillmentEnd){amount=Number(amount);duration=Number(duration);interestRate=Number(interestRate);if(amount<MINIMUM_AMOUNT){throw"Amount is too low. It has to be bigger than "+MINIMUM_AMOUNT;}
if(amount>MAXIMUM_AMOUNT){throw"Amount is too high. It has to be lower than "+MAXIMUM_AMOUNT;}
if(!contains(AVAILABLE_INTEREST_RATES,interestRate)){throw"Unsupported interestRate "+interestRate+". Supported interest rates are: "+AVAILABLE_INTEREST_RATES;}
if(!contains(PRICE_MATRIX[interestRate],duration)){throw"Unsupported duration "+duration+" supported durations are: "+PRICE_MATRIX[interestRate];}
if(isNullOrUndefined(fulfillmentStart)){throw"FulfillmentStart required";}
if(isNullOrUndefined(fulfillmentEnd)){throw"FulfillmentEnd required";}
return new InstallmentCalculator(amount,duration,interestRate,currency,new payolutionXDate(getReferenceDay(fulfillmentStart,fulfillmentEnd))).calculate();}
global.Payolution={getMinimumAmount:function(){return MINIMUM_AMOUNT;},getMaximumAmount:function(){return MAXIMUM_AMOUNT;},getAvailableDurations:function(){return AVAILABLE_DURATIONS;},getAvailableInterestRates:function(){return AVAILABLE_INTEREST_RATES;},getPriceMatrix:function(){return PRICE_MATRIX;},getAvailableDurationsForInterestRate:function(interestRate){interestRate=Number(interestRate);if(!contains(AVAILABLE_INTEREST_RATES,interestRate)){return[];}
return PRICE_MATRIX[interestRate];},getDefaultInterestRate:function(interestRate){if(INTEREST_STRATEGY=="DURATION_BASED"){return null;}
return DEFAULT_INTEREST_RATE;},calculateInstallment:function(amount,duration){return calculate(amount,duration,getDefaultInterestRate(duration),null,DEFAULT_FULFILLMENT_DATE,DEFAULT_FULFILLMENT_DATE);},calculateInstallmentWithReferenceDay:function(amount,duration,fulfillmentDate){return calculate(amount,duration,getDefaultInterestRate(duration),null,fulfillmentDate,fulfillmentDate);},calculateInstallmentWithFulfillmentInfo:function(amount,duration,fulfillmentStart,fulfillmentEnd){return calculate(amount,duration,getDefaultInterestRate(duration),null,fulfillmentStart,fulfillmentEnd);},calculateInstallmentForInterestRate:function(amount,duration,interestRate){return calculate(amount,duration,interestRate,null,DEFAULT_FULFILLMENT_DATE,DEFAULT_FULFILLMENT_DATE);},calculateInstallmentForInterestRateWithReferenceDay:function(amount,duration,interestRate,fulfillmentDate){return calculate(amount,duration,interestRate,null,fulfillmentDate,fulfillmentDate);},calculateInstallmentForInterestRateWithFulfillmentInfo:function(amount,duration,interestRate,fulfillmentStart,fulfillmentEnd){return calculate(amount,duration,interestRate,null,fulfillmentStart,fulfillmentEnd);},calculateInstallmentFixedCurrency:function(amount,duration,currency){return calculate(amount,duration,getDefaultInterestRate(duration),currency,DEFAULT_FULFILLMENT_DATE,DEFAULT_FULFILLMENT_DATE);},calculateInstallmentFixedCurrencyWithReferenceDay:function(amount,duration,currency,fulfillmentDate){return calculate(amount,duration,getDefaultInterestRate(duration),currency,fulfillmentDate,fulfillmentDate);},calculateInstallmentFixedCurrencyWithFulfillmentInfo:function(amount,duration,currency,fulfillmentStart,fulfillmentEnd){return calculate(amount,duration,getDefaultInterestRate(duration),currency,fulfillmentStart,fulfillmentEnd);},calculateInstallmentFixedCurrencyWithReferenceDayAndInterestRate:function(amount,duration,interestRate,currency,fulfillmentDate){return calculate(amount,duration,interestRate,currency,fulfillmentDate,fulfillmentDate);},calculateInstallmentFixedCurrencyWithFulfillmentInfoAndInterestRate:function(amount,duration,interestRate,currency,fulfillmentStart,fulfillmentEnd){return calculate(amount,duration,interestRate,currency,fulfillmentStart,fulfillmentEnd);}}})(this);