/* Ethan Huynh
 * Date: 12/04/2021
 * COSC 1315 001
 * Purpose: Program to check heart rate of user, and tell if they are in the right zone of heart rate or not.
 */


package program05;

import java.util.Scanner;
import java.util.*;
public class Program05 {

	public static void main(String[] args) {
		
		 
		Scanner scanner = new Scanner(System.in);
		
		System.out.println("Please input your heart rate: ");
		
		int heartRate = scanner.nextInt();
		
		System.out.println("Your date of birth in dd/mm/yyyy is:  ");
		
		int birthDay = scanner.nextInt();
		int birthMonth = scanner.nextInt();
		int birthYear = scanner.nextInt();
		
		int age = computeAge(birthDay, birthMonth, birthYear);
		
		int maxHeartRate = computeMaximumHeartRate(age);
		int minHeartRate = computeMinimumHeartRate(age);
		
		if(heartRate < maxHeartRate || heartRate > minHeartRate) {
			System.out.println("Congratulations! You're in the target rate zone!");
		}
		else {
			System.out.println("WARNING! YOU ARE NOT IN THE TARGET HEART RATE ZONE!");
		}
	
		
	}
	public static int computeMaximumHeartRate(int age) {
		int maxHeartRate = (int)(220 * .85);
		System.out.println("Your maximum heartrate is: " + maxHeartRate);
		return maxHeartRate;
	}
	public static int computeMinimumHeartRate(int age) {
		int maxHeartRate = (int)(220 * .50); 
		System.out.println("Your minimum heartrate is: " + maxHeartRate);
		return maxHeartRate;
	}
	
		public static int computeAge(int day, int month, int year) {
			Scanner scanner1 = new Scanner(System.in);
			System.out.println("Enter current date dd/mm/yy");
			int currentDay = scanner1.nextInt();
			int currentMonth = scanner1.nextInt();
			int currentYear = scanner1.nextInt();
			int age; 
			if(currentMonth >= month || currentDay >= day)
			{
				 age = currentYear - year;
			}
			else {
				 age = (currentYear - year) - 1;
			}
			System.out.println("Your age is currently: " + age);
			return age; 
			
		}
		
		}