complete code

src/main/java/DownloadConfig.java

@@ -14,6 +14,7 @@ public class DownloadConfig {
     /**
      * Constructs a new DownloadConfig with specified simulation parameters.
      */
+
     public DownloadConfig(String fileName, int totalSizeMB, int chunkCount,
                           int minStepDelayMs, int maxStepDelayMs,
                           double minStepDownloadMB, double maxStepDownloadMB) {

src/main/java/DownloadWorker.java

@@ -21,23 +21,63 @@ public class DownloadWorker implements Runnable {
 
     @Override
     public void run() {
-        // TODO: Record the chunk start time in chunkStatus.
+
+
+        long start_time = System.currentTimeMillis();
+        chunkStatus.setStartTimeMs(start_time);
+
+
         double downloaded = 0.0;
 
-        // TODO: Print a message that this chunk has started downloading.
+        System.out.println("The chunk number: " + chunkStatus.getChunkId() + " start" );
+
 
         while (downloaded < chunkStatus.getChunkSizeMB()) {
-            // TODO: Generate a random sleep delay between min and max delay.
-            // TODO: Sleep for that delay.
-            // TODO: Generate a random download amount for this step.
-            // TODO: Increase downloaded, but do not go beyond chunk size.
-            // TODO: Save the updated downloaded value into chunkStatus.
-            // TODO: Optionally print step-by-step progress.
+
+            int delay = random.nextInt(config.getMaxStepDelayMs() - config.getMinStepDelayMs() + 1)
+                    + config.getMinStepDelayMs();
+            try {
+                Thread.sleep(delay);
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            }
+
+
+
+            double downloadValue = (random.nextDouble()*(config.getMaxStepDownloadMB() - config.getMinStepDownloadMB()))
+                    + config.getMinStepDownloadMB();
+
+
+
+            if(downloadValue + chunkStatus.getDownloadedMB() > chunkStatus.getChunkSizeMB()){
+                downloadValue = chunkStatus.getChunkSizeMB() - chunkStatus.getDownloadedMB();
+            }
+
+
+            chunkStatus.setDownloadedMB(downloadValue + chunkStatus.getDownloadedMB());
+            downloaded = chunkStatus.getDownloadedMB();
+
+
+            // you can comment next line to get better output
+            System.out.println( "The chunk number " + chunkStatus.getChunkId()
+                    + "download :"+ downloadValue+"(MB)" + chunkStatus.getProgressPercentage());
+
         }
 
-        // TODO: Mark the chunk as completed.
-        // TODO: Record the chunk end time in chunkStatus.
-        // TODO: Print a message that this chunk has finished downloading.
+        chunkStatus.setCompleted(true);
+
+
+
+        long end_time = System.currentTimeMillis();
+        chunkStatus.setEndTimeMs(end_time);
+
+
+        System.out.println("\u001B[33m" +"The chunk number" +chunkStatus.getChunkId()
+                + "Finished the download. Time:"
+                +( chunkStatus.getEndTimeMs() - chunkStatus.getStartTimeMs() )+ "(ms).  Speed =" +
+                        (chunkStatus.getChunkSizeMB()/( chunkStatus.getEndTimeMs() - chunkStatus.getStartTimeMs() ) *1000)
+                        +"  Mb/s"+ "\u001B[0m" );
+
     }
 
 }

src/main/java/Main.java

@@ -34,50 +34,45 @@ public class Main {
 
             workerThreads.add(workerThread);
 
-            // TODO:
-            // Students may print helpful debug information here,
-            // for example which chunk is assigned to which worker thread.
+            System.out.println("Chunk number " + chunk.getChunkId() +
+                    "assigend to thread number "+  workerThread.getName() );
         }
 
+        System.out.println("------------------------------");
+        System.out.println("Total Threads: " + workerThreads.size());
+
         // 4. Create and start monitor thread
         ProgressMonitor monitor = new ProgressMonitor(config, chunks);
         Thread monitorThread = new Thread(monitor, "Progress-Monitor");
 
-        // TODO:
-        // Start the monitor thread before starting the workers
-        // so that progress can be displayed while downloading happens.
-        //
-        // Example idea:
-        // monitorThread.start();
 
-        // 5. Start worker threads
-        // TODO:
-        // Start each worker thread in workerThreads.
-        // Use a loop and call start() on each thread.
+        // 5. start threads
+        monitorThread.start();
+        for(Thread th:workerThreads){
+            th.start();
+        }
+
 
         // 6. Wait for workers to finish
-        // TODO:
-        // Wait for all worker threads to complete by calling join().
-        // This should be done inside a try-catch block for InterruptedException.
-        //
-        // Hint:
-        // for (Thread thread : workerThreads) {
-        //     thread.join();
-        // }
+        for(Thread th : workerThreads){
+            try {
+                th.join();
+            } catch (InterruptedException e) {
+                System.out.println("Main thread interrupted");
+            }
+        }
 
-        // TODO:
-        // After all workers finish, the monitor thread may also need to stop.
-        // Depending on how ProgressMonitor is implemented, students may:
-        // - wait for it to finish on its own, or
-        // - add a stopping mechanism in ProgressMonitor later.
-        //
-        // If your monitor finishes automatically, you may join it here.
 
-        // NOTE:
-        // this final report may show 0 progress because no worker has actually run yet.
-        // Until students complete the thread start/join TODOs above,
+        // 7. Wait for monitor to finish
+        try {
+            monitorThread.join();
+        } catch (InterruptedException e) {
+            System.out.println(" Main thread interrupted");
+        }
 
-        // 7. Print final report
+
+
+        // 8. Print final report
         System.out.println();
         System.out.println("=== Final Report ===");
 

src/main/java/ProgressMonitor.java

@@ -16,15 +16,6 @@ public class ProgressMonitor implements Runnable {
 
     @Override
     public void run() {
-        // TODO:
-        // Repeatedly check chunk progress until all chunks are completed.
-        // In each loop:
-        // 1. Read the downloaded size from every chunk
-        // 2. Add all downloaded amounts to totalDownloadedMB
-        // 3. Count completed chunks
-        // 4. Print a progress message
-        // 5. If completedChunks == chunks.size(), print a final monitor message and stop
-        // 6. Otherwise sleep for monitorDelayMs and continue
 
 
         while (true) {
@@ -44,6 +35,7 @@ public class ProgressMonitor implements Runnable {
                 percent = (totalDownloadedMB * 100.0) / totalSizeMB;
             }
 
+            System.out.println("\u001B[34m");
             System.out.printf(
                     "Progress for %s: %.1f/%.1f MB (%.2f%%), completed chunks: %d/%d%n",
                     fileName,
@@ -53,10 +45,14 @@ public class ProgressMonitor implements Runnable {
                     completedChunks,
                     chunks.size()
             );
+            System.out.println("\u001B[0m");
 
 
-            // TODO:
-            // If all chunks are completed, print a final message and exit the loop
+
+            if(completedChunks == chunks.size()){
+                System.out.println("ALL CHUNKS FINISHED");
+                return;
+            }
 
             try {
                 Thread.sleep(monitorDelayMs);
@@ -65,5 +61,6 @@ public class ProgressMonitor implements Runnable {
                 return;
             }
         }
+
     }
 }