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package ca.mokhan.assignment1;
import java.util.ArrayList;
import java.util.Currency;
import java.util.Locale;
import java.util.Random;
public class EmployeeSavings extends AddressBook {
private double accountValue;
private double[] monthlyInterests;
private double[] monthlySavings;
private double monthlyContribution;
public static final double ANNUAL_INTEREST_RATE = 0.05;
public EmployeeSavings(String firstName, String lastName) {
this(firstName, lastName, new Random().nextInt(800 - 100) + 100.0);
}
public EmployeeSavings(String firstName, String lastName, double monthlyContribution) {
super(firstName, "", lastName);
this.monthlyContribution = monthlyContribution;
this.accountValue = predictBalanceAfterMonths(12);
}
// what is d1, d2?
public EmployeeSavings(String firstName, String lastName, double[] d1, double[] d2) {
super(firstName, "", lastName);
}
public double getAccountValue() {
return this.accountValue;
}
public double[] getMonthlyInterests() {
return this.monthlyInterests;
}
public double[] getMonthlySavings() {
return this.monthlySavings;
}
public double[] calculateInterests() {
this.monthlyInterests = new double[12];
for (int i = 1; i <= 12; i++) this.monthlyInterests[i - 1] = predictInterestAfterMonths(i);
return this.monthlyInterests;
}
public double[] generateMonthlySavings() {
this.monthlySavings = new double[12];
for (int i = 1; i <= 12; i++) this.monthlySavings[i - 1] = predictBalanceAfterMonths(i);
return this.monthlySavings;
}
public double predictBalanceAfterMonths(int months) {
double monthlyRate = ANNUAL_INTEREST_RATE / 12.0;
double balance = 0;
for (int i = 0; i < months; i++)
balance = (balance + this.monthlyContribution) * (1 + monthlyRate);
return Math.round(balance * 1000) / 1000.0;
}
public double predictInterestAfterMonths(int months) {
return Math.round(
(predictBalanceAfterMonths(months) - (months * this.monthlyContribution)) * 1000)
/ 1000.0;
}
public static String getReport(EmployeeSavings[] accounts) {
ArrayList<String> statement = new ArrayList<String>();
for (EmployeeSavings account : accounts) statement.add(account.toString());
return String.join(System.lineSeparator(), statement);
}
@Override
public String toString() {
Currency currency = Currency.getInstance(Locale.getDefault());
return String.format(
"%s %s%.2f", super.getFirstName(), currency.getSymbol(), this.getAccountValue());
}
}
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