Added REPORT.md for the theoretical questions

Finished ProgressMonitor, DownloadWorker and Main classes.

src/main/java/DownloadWorker.java

@@ -1,4 +1,6 @@
+import java.time.LocalTime;
 import java.util.Random;
+import java.lang.Thread;
 
 /**
  * Simulates downloading a single chunk of a file.
@@ -21,23 +23,33 @@ public class DownloadWorker implements Runnable {
 
     @Override
     public void run() {
-        // TODO: Record the chunk start time in chunkStatus.
+        // Records current system time
+        chunkStatus.setStartTimeMs(System.currentTimeMillis());
+
         double downloaded = 0.0;
 
-        // TODO: Print a message that this chunk has started downloading.
+        System.out.println("A new chunk downloader with id: " + chunkStatus.getChunkId() + " started downloading...");
 
         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.
+            // Sleeps the thread to mimic a part of the chunk being downloaded in the random time.
+            try{
+                Thread.sleep(random.nextInt(5000));
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            }
+
+            // Gets a random number as the downloaded size in the random timespan
+            double downloadedSizeMB = random.nextDouble(chunkStatus.getChunkSizeMB());
+            downloaded += downloadedSizeMB;
+            chunkStatus.setDownloadedMB(downloaded);
+
+            System.out.println("Downloaded: " + downloadedSizeMB + "MBs.");
         }
 
-        // TODO: Mark the chunk as completed.
-        // TODO: Record the chunk end time in chunkStatus.
-        // TODO: Print a message that this chunk has finished downloading.
+        // Sets the chunk status, records the end time
+        chunkStatus.setCompleted(true);
+        chunkStatus.setEndTimeMs(System.currentTimeMillis());
+        System.out.println("Chunk downloader with id: " + chunkStatus.getChunkId() + " finished its work.");
     }
 
 }

src/main/java/Main.java

@@ -34,48 +34,34 @@ 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 with id: " + chunk.getChunkId() + " is assigned to Thread: " + workerThread.getName());
         }
 
         // 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 & monitor thread
 
-        // 5. Start worker threads
-        // TODO:
-        // Start each worker thread in workerThreads.
-        // Use a loop and call start() on each thread.
+        monitorThread.start();
+        for (Thread workerThread : workerThreads){
+            workerThread.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();
-        // }
+        // 6. Wait for the workers to finish
+        for (Thread workerThread : workerThreads){
+            try {
+                workerThread.join();
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            }
+        }
 
-        // 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,
+        try {
+            monitorThread.join();
+        } catch (InterruptedException e) {
+            throw new RuntimeException(e);
+        }
 
         // 7. Print final report
         System.out.println();

src/main/java/ProgressMonitor.java

@@ -16,17 +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) {
             double totalDownloadedMB = 0.0;
             int completedChunks = 0;
@@ -54,15 +43,18 @@ public class ProgressMonitor implements Runnable {
                     chunks.size()
             );
 
-
-            // TODO:
-            // If all chunks are completed, print a final message and exit the loop
-
-            try {
-                Thread.sleep(monitorDelayMs);
-            } catch (InterruptedException e) {
-                System.out.println("Progress monitor interrupted.");
-                return;
+            if (completedChunks == chunks.size()){
+                System.out.println("All workers finished their job, downloaded the file successfully. \nHere's the report: ");
+                for (ChunkStatus chunk : chunks){
+                    System.out.println(chunk.toString());
+                }
+                break;
+            }else {
+                try {
+                    Thread.sleep(monitorDelayMs);
+                } catch (InterruptedException e) {
+                    throw new RuntimeException(e);
+                }
             }
         }
     }