package com.university.chat.Client;

public class TransferProgress {

    private final long total;
    private final long startTime;
    private static final int WIDTH = 30;

    public TransferProgress(long total) {
        this.total = total;
        this.startTime = System.currentTimeMillis();
    }

    public void update(long current) {

        double percent = (double) current / total;
        int filled = (int) (percent * WIDTH);

        StringBuilder bar = new StringBuilder("[");
        for (int i = 0; i < WIDTH; i++) {
            bar.append(i < filled ? "█" : " ");
        }
        bar.append("]");

        long elapsed = System.currentTimeMillis() - startTime;
        double speed = current / 1024.0 / 1024.0 / (elapsed / 1000.0 + 0.001);

        System.out.printf("\r%s %3d%% | %.2f MB/s",
                bar,
                (int) (percent * 100),
                speed);

        if (current >= total) {
            System.out.println();
        }
    }
}