add bonus tasks

src/main/java/ProgressMonitor.java

@@ -16,6 +16,7 @@ public class ProgressMonitor implements Runnable {
 
     @Override
     public void run() {
+        double previousProgress = 0.0;
 
         while (true) {
             double totalDownloadedMB = 0.0;
@@ -34,15 +35,36 @@ public class ProgressMonitor implements Runnable {
                 percent = (totalDownloadedMB * 100.0) / totalSizeMB;
             }
 
-            System.out.printf(
-                    "Progress for %s: %.1f/%.1f MB (%.2f%%), completed chunks: %d/%d%n",
-                    fileName,
-                    totalDownloadedMB,
-                    (double) totalSizeMB,
-                    percent,
-                    completedChunks,
-                    chunks.size()
-            );
+
+            double deltaMB = totalDownloadedMB - previousProgress;
+            double speedMBps = deltaMB / (monitorDelayMs / 1000.0);
+            previousProgress = totalDownloadedMB;
+
+
+            double remainingMB = totalSizeMB - totalDownloadedMB;
+            long etaSeconds = (speedMBps > 0) ? (long)(remainingMB / speedMBps) : 0;
+
+
+            int barWidth = 30;
+            int filled = (int)(percent / 100.0 * barWidth);
+            filled = Math.min(filled, barWidth);
+            String bar = "=".repeat(filled) + (filled < barWidth ? ">" : "") + " ".repeat(Math.max(0, barWidth - filled - 1));
+
+
+            System.out.printf("\r[%-30s] %5.1f%% | %5.1f/%d MB | Speed: %.2f MB/s | ETA: %ds | Chunks: %d/%d   ",
+                    bar, percent, totalDownloadedMB, totalSizeMB,
+                    speedMBps, etaSeconds,
+                    completedChunks, chunks.size());
+
+//            System.out.printf(
+//                    "Progress for %s: %.1f/%.1f MB (%.2f%%), completed chunks: %d/%d%n",
+//                    fileName,
+//                    totalDownloadedMB,
+//                    (double) totalSizeMB,
+//                    percent,
+//                    completedChunks,
+//                    chunks.size()
+//            );
 
 
             if (completedChunks == chunks.size()) {