/**
 * Assignment 1, COMP268 Class: Number.java
 *
 * @description Provides static methods for operating on numeric values.
 * @author: mo khan Student ID: 3431709
 * @date May 8, 2019
 * @version 1.0
 */
package Q9;

import java.util.ArrayList;

public class Number {
  /**
   * Checks to see if a number is divisible by 5.
   *
   * @param n the number to check for divisibility
   * @return true if the number is evenly divisible by 5
   */
  public static boolean isDivisibleBy5(int n) {
    return isDivisibleBy(n, 5);
  }

  /**
   * Checks to see if a number is divisible by 7
   *
   * @param n the number to check for divisibility
   * @return true if the number is evenly divisible by 7
   */
  public static boolean isDivisibleBy7(int n) {
    return isDivisibleBy(n, 7);
  }

  /**
   * Checks if a number is odd
   *
   * @param n the number to check
   * @return true if the number is an odd number.
   */
  public static boolean isOdd(int n) {
    return !isDivisibleBy(n, 2);
  }

  /**
   * Checks if a number is prime. This is naive implementation of the prime number check that will
   * blow the stack for any sufficiently large number.
   *
   * @param n the number to check
   * @return true if the number is a prime number
   */
  public static boolean isPrime(int n) {
    if (n <= 1) return false;

    for (int i = n - 1; i > 1; i--) if (isDivisibleBy(n, i)) return false;

    return true;
  }

  /**
   * Checks to see if a number is divisible by denominator
   *
   * @param n the number to check for divisibility
   * @param denominator the number to see if n is evenly divisible by
   * @return true if the number is evenly divisible by denominator
   */
  public static boolean isDivisibleBy(int n, int denominator) {
    return n % denominator == 0;
  }

  /** @return a list of strings for each number between 0 and 113 */
  public static ArrayList<String> iterate() {
    ArrayList<String> items = new ArrayList<String>();
    ArrayList<String> row = new ArrayList<String>();
    for (Integer i = 0; i < 113; i++) {
      row.clear();
      row.add(String.format("%d", i));

      if (isOdd(i)) row.add(String.format("%d is odd", i));
      if (isDivisibleBy5(i)) row.add("hi five");
      if (isDivisibleBy7(i + (i + 1))) row.add("wow");
      if (isPrime(i)) row.add("prime");

      items.add(String.join(",", row));
    }
    return items;
  }

  public static void main(String[] args) {
    for (String item : Number.iterate()) System.out.println(item);
  }
}