added window with the database statistics

backend.py

@@ -218,4 +218,31 @@ class AnimeBackend:
             self.db.commit()
         except Exception as e:
             logging.error(f"Error deleting year {year}: {e}")
-            self.db.rollback()
+            self.db.rollback()
+
+    def get_total_entries(self):
+        try:
+            cursor = self.db.cursor()
+            cursor.execute("SELECT COUNT(*) FROM anime")
+            return cursor.fetchone()[0]
+        except Exception as e:
+            logging.error(f"Error getting total entries: {e}")
+            return 0
+
+    def get_completed_entries(self):
+        try:
+            cursor = self.db.cursor()
+            cursor.execute("SELECT COUNT(*) FROM anime WHERE status = 'completed'")
+            return cursor.fetchone()[0]
+        except Exception as e:
+            logging.error(f"Error getting completed entries: {e}")
+            return 0
+
+    def get_entries_by_type(self):
+        try:
+            cursor = self.db.cursor()
+            cursor.execute("SELECT type, COUNT(*) FROM anime GROUP BY type ORDER BY 2 DESC")
+            return cursor.fetchall()  # Returns list of tuples: (type, count)
+        except Exception as e:
+            logging.error(f"Error getting entries by type: {e}")
+            return []

frontend.py

@@ -221,6 +221,9 @@ class AnimeTracker(QMainWindow):
         random_act = QAction('Random Pick', self)
         random_act.triggered.connect(self.random_pick)
         tools_menu.addAction(random_act)
+        statistics_act = QAction('Statistics', self)
+        statistics_act.triggered.connect(self.show_statistics)
+        tools_menu.addAction(statistics_act)
         help_menu = menubar.addMenu('Help')
         shortcuts_act = QAction('Shortcuts', self)
         shortcuts_act.triggered.connect(self.show_shortcuts)
@@ -713,6 +716,41 @@ class AnimeTracker(QMainWindow):
         else:
             QMessageBox.information(self, "Random Pick", "No unwatched anime in this tab.")
 
+    def show_statistics(self):
+        dialog = QDialog(self)
+        dialog.setWindowTitle("Anime Statistics")
+        layout = QVBoxLayout(dialog)
+
+        total = self.backend.get_total_entries()
+        completed = self.backend.get_completed_entries()
+        percentage = (completed / total * 100) if total > 0 else 0
+
+        layout.addWidget(QLabel(f"Total anime entries: <b>{total}</b>"))
+        layout.addWidget(QLabel(f"Total completed entries: <b>{completed}</b>"))
+        layout.addWidget(QLabel(f"Percentage of completed entries: <b>{percentage:.2f}%</b>"))
+
+        layout.addWidget(QLabel("Number of anime entries by type:"))
+        types_data = self.backend.get_entries_by_type()
+        if types_data:
+            for typ, count in types_data:
+                display_type = typ if typ else "None"  # Handle empty type as 'None'
+                layout.addWidget(QLabel(f"  {display_type}: <b>{count}</b>"))
+        else:
+            layout.addWidget(QLabel("  No data available"))
+
+        db_path = 'anime_backlog.db'
+        if os.path.exists(db_path):
+            db_size_kb = os.path.getsize(db_path) / 1024
+            layout.addWidget(QLabel(f"Size of the database: <b>{db_size_kb:.2f} Kb</b>"))
+        else:
+            layout.addWidget(QLabel("Size of the database: N/A (database file not found)"))
+
+        buttons = QDialogButtonBox(QDialogButtonBox.Ok)
+        buttons.accepted.connect(dialog.accept)
+        layout.addWidget(buttons)
+
+        dialog.exec_()
+
     def import_csv(self):
         file_name, _ = QFileDialog.getOpenFileName(self, "Import CSV", "", "CSV Files (*.csv)")
         if file_name: