import java.util.*;

// Change this to an abstract class?
class Queue{

	private int count;
	ArrayList<Object> qlist = new ArrayList<Object>();

	Queue(){
		count = 0;
	}

	public Object dequeue(){
		if(isEmpty()){
			System.out.println("The queue is empty");
		}

		Object res = qlist.get(0);
		qlist.remove(0);
		count --;
		return res;
	}

	public void enqueue(Object item){
		System.out.println("\n*****************************************");
		System.out.println("Adding the below information to the queue" + item);
		System.out.println("*****************************************");
		qlist.add(item);
		count ++;
	}

	public int size(){
		return count;
	}

	public Boolean isEmpty(){
		return(size() == 0);
	}

	public String toString(){
		return Arrays.deepToString(qlist.toArray());
	}
}

class Task{

	private String date;
	private String start_time;
	private String duration;
	ArrayList<String> people = new ArrayList<String>();

	Task(String date, String start_time, String duration, ArrayList<String> people){
		this.date = date;
		this.start_time = start_time;
		this.duration = duration;
		this.people = people;
	}

	public String toString(){
		return("\nType: task" + "\nDate: " + date + "\nStart time: " + start_time + "\nDuration: " + duration +"\nPeople: " + Arrays.deepToString(people.toArray()));
	}
}

// *************************************************************
// Change input so that location can be multiple words
// *************************************************************
class Event{

	private String date;
	private String start_time;
	private String location;

	Event(String date, String start_time, String location){
		this.date = date;
		this.start_time = start_time;
		this.location = location;
	}

	public String toString(){
		return("\nType: event" + "\nDate: " + date + "\nStart time: " + start_time + "\nLocation: " + location);
	}
}

class ToDoList{

	public static void remove_item(Queue to_do_list){
		Object item = to_do_list.dequeue();
		System.out.println("\nRemoved: " + item + "\nfrom the to-do list");
	}

	public static void add_item(Object item, Queue to_do_list){
		to_do_list.enqueue(item);
	}

	public static void createTask(Queue to_do_list){
		Scanner input = new Scanner(System.in);

		System.out.println("\n*Creating Task*\nInput in this order a date, start time, duration and the people that are involved");
		String info = input.nextLine();
		String words[] = info.split(" ");

		ArrayList<String> people = new ArrayList<String>();
		if(words.length >= 4){
			System.out.println("Received: " + Arrays.toString(words));
			String date = words[0];
			String start_time = words[1];
			String duration = words[2];
			for(int i = 3; i < words.length; i++){
				people.add(words[i]);
			}
			Task newTask = new Task(date, start_time, duration, people);
			add_item(newTask, to_do_list);
		}
		else{
			System.out.println("\n**********************************************************");
			System.out.println("Not enough information. Please enter all requested details");
			System.out.println("**********************************************************");
		}
	}

	public static void createEvent(Queue to_do_list){
		Scanner input = new Scanner(System.in);
		System.out.println("\n*Creating Event*\nInput in this order a date, start time and location");
		String info = input.nextLine();
		String words[] = info.split(" ");
		if(words.length >= 3){
			String date = words[0];
			String start_time = words[1];
			String[] locationTokens = Arrays.copyOfRange(words, 2, words.length);
			String location = String.join(" ", locationTokens);
			Event newEvent = new Event(date, start_time, location);
			add_item(newEvent, to_do_list);
		}
		else{
			System.out.println("\n***********************************************************************");
			System.out.println("Incorrect amount of information entered. Please enter requested details");
			System.out.println("***********************************************************************");
		}
	}

	public static void prompt(){
		System.out.println("\nPlease enter:");
		System.out.println("\"task\" to input a task");
		System.out.println("\"event\" to input an event");
		System.out.println("\"dequeue\" to get the item on the top of the queue");
		System.out.println("\"queue\" to see what is on the to do list queue");
		System.out.println("\"exit\" to exit");
	}

	public static void main(String[] args){

		Queue to_do_list =  new Queue();
		Scanner input = new Scanner(System.in);
		prompt();

		String item = input.next();
		while(!"exit".equals(item)){
			if(item.equals("task")){
				createTask(to_do_list);
			}
			else if(item.equals("event")){
				createEvent(to_do_list);
			}
			else if(item.equals("dequeue")){
				remove_item(to_do_list);
			}
			else if(item.equals("queue")){
				System.out.println("\nCurrent to do list:\n" + to_do_list);
			}
			else{
				System.out.println("Please enter one of the below commands");
				prompt();
			}
			System.out.println("\nPlease enter a command");
			item = input.next();
		}
		System.out.println("\nEnding program, goodbye");
	}
}