package com.gradescope.hw07;
import java.util.ArrayList;

public class HochTable {
	int chairCount;
	int personCount;
	ArrayList<String> people;

	/*
	 * Constructor for HochTable
	 */
	public HochTable(){
		// By default, HochTables have 6 chairs.
		this(6);
	}
	/*
	 * HochTable(int capacity)
	 * 
	 * HochTable constructor where the input determines the size of the Table.
	 * Throws an IllegalArgumentException if the argument is less than 0.
	 */
	public HochTable(int capacity){
		if (capacity < 0) {
			throw new IllegalArgumentException(
					"Tables must start with a capacity of 0 or more");
		}
		this.chairCount = capacity;
		this.personCount = 0;
		this.people = new ArrayList<String>();
	}
	/*
	 * emptySeat()
	 * 
	 * Hoch tables are never full! 
	 * returns true.
	 */
	public boolean emptySeat(){
		// Hoch tables are never full! N+1
		return true;
	}
	/*
	 * addPerson(String name)
	 * 
	 * adds the new person to the table by updating the personCount variable and
	 * the list of names.
	 * returns a String welcoming the person to the table.
	 */
	public String addPerson(String name){
		if (this.chairCount == this.personCount){
			this.chairCount++;
		}
		// return a greeting to the person!
		if (this.emptySeat()) {
			this.personCount++;
			this.people.add(name);
			return "Welcome " + name + "!";
		} else {
			return "Sorry - there is no space for you " + name + "!";
		}
	}
	/*
	 * removePerson(String name)
	 * 
	 * removes a person from the table.
	 * returns a salutation.
	 */
	public String removePerson(String name) {
		boolean wasRemoved = this.people.remove(name);
		if (!wasRemoved) {
			return "Weird! " + name + " was never here!";
		}
		this.personCount--;
		if (this.personCount == 0) {
			return "(Silence - no one is here to say goodbye)";
		} else {
			return "Bye " + name;
		}
	}
	/*
	 * classStartingSoon()
	 * 
	 * removes everyone from the table.
	 */
	public void classStartingSoon(){
		this.personCount = 0;
		this.people = new ArrayList<String>();
	}
}