/* Class to represent a Person consisting of their first and last names, age and whether they are married.  If they are married, we store
 * that Person object as their spouse */

public class Person
{
	private String first, last;					// name
	private boolean married;					// if married, also store spouse - note that if we don't know who the spouse is, we use the 0-arg constructor to create an unknown Person as spouse
	private Person spouse;
	private int age;							// Person's age
	
	public Person()								// 0-arg constructor, we know nothing of this Person
	{
		first = ""; last = "";
		married = false; 
		spouse = null;
		age = 0;
	}

	public Person(String f, String l)			// 2-arg constructor, we only know their name
	{
		first = f; last = l;
		married = false; 
		spouse = null;
		age = 0;
	}
	
	public Person(String f, String l, int a)	// 3-arg constructor, we will set married & spouse separately via getsMarried
	{
		first = f; last = l;
		married = false; 
		spouse = null;
		if(a>0) age = a; else age = 0;
	}
	
	public void getsMarried()					// mutator to change a Person to being married to an unknown Person
	{
		if(!married)							// only allowed if not yet married
		{
			married = true;					
			spouse = new Person();				// we don't know the spouse so use the 0-arg constructor
		}		
	}
	
	public void getsMarried(Person s)			// mutator to change a Person to married where we know the Person
	{
		if(!married)							// again, only allow marriage when not yet married
		{
			married = true;
			spouse = s;							// set this Person's spouse to s
			s.setMarried();						// now set Person s to being married to this Person
			s.setSpouse(this);
		}
	}
	
	public void getsDivorced()					// upon a divorce, reset married and spouse (note that this does not adjust 
	{											// this Person's spouse's info as the spouse may not have that info available, so the other
		if(married)								// Person must also get a divorce
		{
			married = false;
			spouse = null;
		}
	}
	
	public void ages(int years)					// mutator for age as long as the parameter is legal
	{
		if(years>0) age+=years;
	}
	
	public void changeName(String f, String l)	// allow a name change
	{
		first = f; last = l;
	}
	
	public void setMarried() { married = true;	}		// mutators for married and spouse
	public void setSpouse(Person p) { spouse = p; }
	
	public String getFirstName() { return first; }		// accessors for first name, last name and full name
	public String getLastName() { return last; }
	public String getName() { return first + " " + last; }
	
	public String getSpouseName() { 					// if married, accessor to return this Person's spouse's name (used in toString)
		if(married) return spouse.getName(); 
		else return "unmarried";
	}
	
	public boolean getMaritalStatus() { return married; }	// accessor for married
	
	public Person getSpouse()			// accessor for spouse
	{
		return spouse;					// note:  returns null if not married
	}
	
	public int getAge()					// accessor for age
	{
		return age;
	}
	
	public String toString()			// returns this Person's first and last name and age, and if married, the spouse's name
	{
		if(!married) return first + " " + last + " is " + age + " years old and unmarried";
		else return first + " " + last + " is " + age + " years old and married to " + spouse.getName();
	}
}