Update app.py

app.py

@@ -376,21 +376,39 @@ def is_slot_allowed_for_year(year, day, slot):
 
 def generate_unused_halls_report(room_slots, output_path="Unused_Halls_Report.xlsx"):
     from openpyxl import Workbook
+    from openpyxl.styles import Alignment
+
     wb = Workbook()
     ws = wb.active
-    ws.title = "Unused Rooms"
+    ws.title = "Unused Halls (Matrix Format)"
 
-    ws.append(["Room", "Day", "Slot"])
+    # Header Row: ["Day", "8-9", "9-10", ..., "6-7"]
+    ws.append(["Day"] + time_slots)
 
-    for room in room_slots:
-        for key in room_slots[room]:
-            if room_slots[room][key]:  # If the slot was never booked
-                day, slot = key.split("-")
-                ws.append([room, day, slot])
+    for day in days:
+        row = [day]
+        for slot in time_slots:
+            free_rooms = []
+            for room in room_slots:
+                key = f"{day}-{slot}"
+                if room_slots[room][key]:
+                    free_rooms.append(room)
+            row.append(", ".join(sorted(free_rooms)))
+        ws.append(row)
+
+    # Wrap text and set column width
+    for col in ws.columns:
+        for cell in col:
+            cell.alignment = Alignment(wrapText=True)
+
+    for i in range(2, len(time_slots) + 2):
+        ws.column_dimensions[chr(64 + i)].width = 25
 
     wb.save(output_path)
 
 
+
+
 def generate_timetable(course_df, room_df, output_dir, room_slots, timetable):
     from openpyxl import Workbook
     from openpyxl.styles import PatternFill