private int countTicketResolutionTime(Ticket ticket) {
        return Days.daysBetween(new LocalDate(ticket.getStartDate()), new LocalDate(ticket.getEndDate())).getDays();
    }


@Override
    public double getAverageResolutionTimePerMonth(String month, int year) throws EntityNotFoundException {
        List<Ticket> tickets = getClosedTicketsPerMonth(month, year);

        double ticketsResolutionTime = 0;
        for (Ticket ticket : tickets) {
            ticketsResolutionTime += countTicketResolutionTime(ticket);
        }

        return ticketsResolutionTime / tickets.size();
    }

public List<Ticket> getClosedTicketsPerMonth(String month, int year) throws EntityNotFoundException {

        List<Ticket> closedTickets = new ArrayList<>();
        for (Ticket ticket : getTicketsPerMonth(month, year)) {
            if (ticket.getStatus().equals("Done") || ticket.getStatus().equals("Rejected") || ticket.getStatus().equals("Done and Archived")) {
                closedTickets.add(ticket);
            }
        }
        return closedTickets;
    }

 @Override
    public double getMediumPerMonth(String month, int year) throws EntityNotFoundException {
        List<Ticket> tickets = getClosedTicketsPerMonth(month, year);

        List<Integer> resolutionTimesPerMonth = new ArrayList<>();
        for (Ticket ticket : tickets) {
            resolutionTimesPerMonth.add(countTicketResolutionTime(ticket));
        }

        return calculateMedium(resolutionTimesPerMonth);
    }

    private double calculateMedium(List<Integer> resolutionTimesPerMonth) {
        Collections.sort(resolutionTimesPerMonth);

        double medium;
        int size = resolutionTimesPerMonth.size();

        if (size % 2 != 0) {
            medium = resolutionTimesPerMonth.get(size / 2);
        } else {
            medium = (resolutionTimesPerMonth.get(size / 2) + resolutionTimesPerMonth.get((size / 2) - 1)) / 2.0;
        }
        return medium;
    }