Untitled

package com.bocodes.integer.division;

public class IntegerDivisionMaker {


    public static void makeDivision(int dividend, int divisor) {
        validateInput(dividend, divisor);
        longDivision(dividend, divisor);

        String divisionSteps = longDivision(dividend, divisor);
        System.out.println("Long Division Method:");
        System.out.println(divisionSteps);
    }

    public static String longDivision(int dividend, int divisor) {
        int quotient = dividend / divisor;
        int remainder = dividend % divisor;
        int[] digits = digitMaker(dividend);

        StringBuilder sb = new StringBuilder();
        sb.append(dividend).append(" | ").append(divisor).append("\n");
        sb.append("Quotient").append(quotient).append("Remainder").append(remainder);

        int currentDividend = remainder;
        int index = digits.length - 1;

        while (index >= 0) {
            currentDividend = currentDividend * 10 + digits[index];
            int currentQuotient = currentDividend / divisor;
            int currentRemainder = currentDividend % divisor;

            sb.append(", ").append(currentQuotient);
            currentDividend = currentRemainder;
            index--;
        }
        sb.append(", ...");
        sb.append("\n\nFinal Result:\n");
        sb.append("Quotient: ").append(quotient).append(", Remainder: ").append(remainder);

        return sb.toString();
    }

    public static int[] digitMaker(int dividend) {

        int dividendLength = (int) Math.log10(dividend) + 1;
        int[] digits = new int[dividendLength];
        int digitIndex = dividendLength - 1;

        while (dividend > 0) {
            int digit = dividend % 10;
            digits[digitIndex] = digit;
            dividend /= 10;
            digitIndex--;
        }

        return digits;
    }

    private static void validateInput(Integer dividend, Integer divisor) {
        if (dividend == null) {
            throw new IllegalArgumentException("can not accept null");
        }
        if (divisor == null) {
            throw new IllegalArgumentException("can not accept null");
        }

        if (dividend == 0 || divisor == 0) {
            throw new IllegalArgumentException("Can not divide by zero");

        }
    }
}