//package PS2a;
import javax.swing.*;

public class ElevatorTest2 {
    public static void main(String[] args) {
        
        // Range of floors; must be same for both elevators
        String text= JOptionPane.showInputDialog("Enter highest floor: ");
        int maxFloor= Integer.parseInt(text);
        text= JOptionPane.showInputDialog("Enter lowest floor: ");
        int minFloor= Integer.parseInt(text);
        Elevator one= new Elevator(maxFloor, minFloor, "One");
        Elevator two= new Elevator(maxFloor, minFloor, "Two");
        Elevator three= new Elevator(maxFloor, minFloor, "Three");
        
        // Master controller for both elevators
        Controller master= new Controller(one, two, three);
        
        while (true) {
            text= JOptionPane.showInputDialog("Enter floor to request elevator (-1 to quit)");
            int elevatorRequest= Integer.parseInt(text);
            if (elevatorRequest == -1)
                break;
            else {
                master.request(elevatorRequest);
            }
        }
        // Statistics at end
        int numReq1= one.getStatistics();
        int numReq2= two.getStatistics();
        int numReq3= three.getStatistics();
        master.getStatistics(numReq1, numReq2, numReq3);
        System.exit(0);
    }
}

class Elevator {
    private int curFloor;
    private int maxFloor;
    private int minFloor;
    private int numRequests=0;
    private int numFloorsMoved=0;
    private String name;
    
    public Elevator(int maxF, int minF, int curF, String n) {
        maxFloor= maxF;
        minFloor= minF;
        curFloor= curF;
        name= n;
    }
    
    public Elevator(int maxF, int minF, String n) {
        this(maxF, minF, minF, n);
    }
    
    public Elevator(int maxF, String n) {
        this(maxF, 1, 1, n);
    }
    
    public void request(int f) {
        if (f < minFloor || f > maxFloor || f == curFloor)
            ;       // Do nothing
        else if (f < curFloor) {     // Elevator must descend
            numRequests++;
            numFloorsMoved += (curFloor - f);
            System.out.println("At floor: " + curFloor);
            while (f < curFloor) {
                curFloor--;
                System.out.println("   Going down past floor: " + curFloor);
            }
            System.out.println("Stop at floor: " + f + "\n");
            
        }
        else {       // Elevator must ascend
            numRequests++;
            numFloorsMoved += (f - curFloor);
            System.out.println("At floor: " + curFloor);
            while (f > curFloor) {
                curFloor++;
                System.out.println("   Going up past floor: " + curFloor);
            }
            System.out.println("Stop at floor: " + f + "\n");
        }
    }
    
    public int getCurrentFloor() {
        return curFloor;
    }
    
    public String getName() {
        return name;
    }
    
    public int getStatistics() {        // Returns number of requests
        System.out.println("Elevator: " + name);
        System.out.println("Number of requests served: " + numRequests);
        System.out.println("Number of floors moved: " + numFloorsMoved);
        if (numRequests > 0)
            System.out.println("Avg floors/move: " + numFloorsMoved/(double)numRequests + "\n");            
        return numRequests;
    }
}

class Controller {
    private Elevator first;
    private Elevator second;
    private Elevator third;
//    private int maxFloor;
//    private int minFloor;
    
    Controller(Elevator a, Elevator b, Elevator c) {
        first= a;
        second= b;
        third= c;
    }
    
    public void request(int f) {
        int floor1= first.getCurrentFloor();
        int floor2= second.getCurrentFloor();
        int floor3= third.getCurrentFloor();
        System.out.println("Elevator One floor: " + floor1);
        System.out.println("Elevator Two floor: " + floor2);
        System.out.println("Elevator Three floor: " + floor3);
        int d1 = Math.abs(f-floor1);
        int d2 = Math.abs(f-floor2);
        int d3 = Math.abs(f-floor3);
        int min = Math.min(d1, Math.min(d2, d3));
        if (min == d1) {
            System.out.println("Chosen elevator: " + first.getName());
            first.request(f);
        }
        else if (min == d2) {
            System.out.println("Chosen elevator: " + second.getName());
            second.request(f);
        }        
        else {
            System.out.println("Chosen elevator: " + third.getName());
            third.request(f);
        }
    }
    
    public void getStatistics(int r1, int r2, int r3) {
        System.out.println("Total requests, all elevators: " + (r1+r2+r3));
    }
}