fix: migrate frontEnd PyQt6 enum scoping and add standalone chatbot launcher

src/chatbot/chatbot_thread.py

@@ -162,15 +162,41 @@ def is_ollama_running():
 
 
 def start_ollama(stop_flag=None):
+    """Start Ollama server silently in the background (no terminal window)."""
+    cmd = ["ollama", "serve"]
     if os.name == 'nt':
-        subprocess.Popen('start cmd /k "ollama serve"', shell=True)
-    else:
-        subprocess.Popen(
-            ['bash', '-c',
-             'x-terminal-emulator -e "ollama serve" || '
-             'gnome-terminal -- ollama serve || '
-             'xterm -e "ollama serve"']
-        )
+        import shutil
+        # If 'ollama' is not directly callable from PATH, check default install locations
+        if not shutil.which("ollama"):
+            local_appdata = os.environ.get("LOCALAPPDATA", "")
+            possible_paths = [
+                os.path.join(local_appdata, "Programs", "Ollama", "ollama.exe"),
+                r"C:\Program Files\Ollama\ollama.exe",
+                r"C:\Program Files (x86)\Ollama\ollama.exe",
+            ]
+            for path in possible_paths:
+                if os.path.exists(path):
+                    cmd = [path, "serve"]
+                    break
+    try:
+        if os.name == 'nt':
+            # Windows: CREATE_NO_WINDOW flag prevents a cmd popup
+            subprocess.Popen(
+                cmd,
+                creationflags=subprocess.CREATE_NO_WINDOW,
+                stdout=subprocess.DEVNULL,
+                stderr=subprocess.DEVNULL,
+            )
+        else:
+            # Linux/macOS: redirect output to /dev/null, no terminal emulator needed
+            subprocess.Popen(
+                cmd,
+                stdout=subprocess.DEVNULL,
+                stderr=subprocess.DEVNULL,
+            )
+    except FileNotFoundError:
+        # ollama binary not found in PATH or disk
+        return False
     for _ in range(30):
         if stop_flag is not None and stop_flag():
             return False
@@ -179,7 +205,6 @@ def start_ollama(stop_flag=None):
             return True
     return False
 
-
 # ── Topic switch detection ───────────────────────────────────────────────────
 
 _STOP_WORDS = {
@@ -264,6 +289,46 @@ def run(self):
             self.result_signal.emit([])
 
 
+# ── Model Pull Worker ─────────────────────────────────────────────────────────
+# Required models for the chatbot to function correctly
+REQUIRED_MODELS = ["qwen2.5-coder:3b", "nomic-embed-text"]
+VISION_MODEL    = "minicpm-v"   # optional — only needed for image analysis
+
+class ModelPullWorker(QThread):
+    """
+    Downloads a single Ollama model in the background.
+    Emits:
+        progress_signal(str)  — human-readable status/percentage string
+        done_signal(bool)     — True on success, False on failure
+    """
+    progress_signal = pyqtSignal(str)
+    done_signal     = pyqtSignal(bool)
+
+    def __init__(self, model_name: str):
+        super().__init__()
+        self.model_name = model_name
+
+    def run(self):
+        try:
+            self.progress_signal.emit(f"⬇️ Downloading {self.model_name}…  0%")
+            for update in ollama.pull(self.model_name, stream=True):
+                # update is a dict with keys: status, completed, total
+                status    = update.get("status", "")
+                completed = update.get("completed", 0)
+                total     = update.get("total", 0)
+                if total and completed:
+                    pct = int((completed / total) * 100)
+                    self.progress_signal.emit(
+                        f"⬇️ Downloading {self.model_name}… {pct}%"
+                    )
+                elif status:
+                    self.progress_signal.emit(
+                        f"⬇️ {self.model_name}: {status}"
+                    )
+            self.done_signal.emit(True)
+        except Exception as e:
+            self.progress_signal.emit(f"❌ Failed to download {self.model_name}: {e}")
+            self.done_signal.emit(False)
 # ── Smart token budget ───────────────────────────────────────────────────────
 
 _COMPLEX_KEYWORDS = {

src/configuration/Appconfig.py

@@ -17,7 +17,7 @@
 #      REVISION: Thursday 29 June 2023
 # =========================================================================
 
-from PyQt5 import QtWidgets
+from PyQt6 import QtWidgets
 import os
 import json
 from configparser import ConfigParser

src/frontEnd/Application.py

@@ -30,8 +30,8 @@
     current_dir = os.path.dirname(os.path.abspath(__file__))
     init_path = os.path.abspath(os.path.join(current_dir, "..", "..")) + os.sep
 
-from PyQt5 import QtGui, QtCore, QtWidgets
-from PyQt5.Qt import QSize
+from PyQt6 import QtGui, QtCore, QtWidgets
+
 from configuration.Appconfig import Appconfig
 from frontEnd import ProjectExplorer
 from frontEnd import Workspace
@@ -42,7 +42,7 @@
 from projManagement.Validation import Validation
 from projManagement import Worker
 from frontEnd.Chatbot import ChatbotGUI
-from PyQt5.QtCore import QTimer
+from PyQt6.QtCore import QTimer, Qsize 
 # Its our main window of application.
 
 
@@ -272,8 +272,8 @@ def initToolBar(self):
         # corner in the application window.
         self.spacer = QtWidgets.QWidget()
         self.spacer.setSizePolicy(
-            QtWidgets.QSizePolicy.Expanding,
-            QtWidgets.QSizePolicy.Expanding)
+            QtWidgets.QSizePolicy.Policy.Expanding,
+            QtWidgets.QSizePolicy.Policy.Expanding)
         self.topToolbar.addWidget(self.spacer)
         self.logo = QtWidgets.QLabel()
         self.logopic = QtGui.QPixmap(
@@ -359,7 +359,7 @@ def initToolBar(self):
         self.lefttoolbar.addAction(self.omedit)
         self.lefttoolbar.addAction(self.omoptim)
         self.lefttoolbar.addAction(self.conToeSim)
-        self.lefttoolbar.setOrientation(QtCore.Qt.Vertical)
+        self.lefttoolbar.setOrientation(QtCore.Qt.Orientation.Vertical)
         self.lefttoolbar.setIconSize(QSize(40, 40))
 
     def closeEvent(self, event):
@@ -383,11 +383,11 @@ def closeEvent(self, event):
         exit_msg = "Are you sure you want to exit the program?"
         exit_msg += " All unsaved data will be lost."
         reply = QtWidgets.QMessageBox.question(
-            self, 'Message', exit_msg, QtWidgets.QMessageBox.Yes,
-            QtWidgets.QMessageBox.No
+            self, 'Message', exit_msg, QtWidgets.QMessageBox.StandardButton.Yes,
+            QtWidgets.QMessageBox.StandardButton.No
         )
 
-        if reply == QtWidgets.QMessageBox.Yes:
+        if reply == QtWidgets.QMessageBox.StandardButton.Yes:
             for proc in self.obj_appconfig.procThread_list:
                 try:
                     proc.terminate()
@@ -417,7 +417,7 @@ def closeEvent(self, event):
             event.accept()
             self.systemTrayIcon.showMessage('Exit', 'eSim is Closed.')
 
-        elif reply == QtWidgets.QMessageBox.No:
+        elif reply == QtWidgets.QMessageBox.StandardButton.No:
             event.ignore()
 
     def new_project(self):
@@ -532,7 +532,7 @@ def plotSimulationData(self, exitCode, exitStatus):
                 self.msg.showMessage(
                     'Data could not be plotted. Please try again.'
                 )
-                self.msg.exec_()
+                self.msg.exec()
                 print("Exception Message:", str(e), traceback.format_exc())
                 self.obj_appconfig.print_error('Exception Message : '
                                                + str(e))
@@ -568,7 +568,7 @@ def open_ngspice(self):
                 self.msg.showMessage(
                     'Netlist (*.cir.out) not found.'
                 )
-                self.msg.exec_()
+                self.msg.exec()
                 return
 
             self.obj_Mainview.obj_dockarea.ngspiceEditor(
@@ -587,7 +587,7 @@ def open_ngspice(self):
                 'Please select the project first.'
                 ' You can either create new project or open existing project'
             )
-            self.msg.exec_()
+            self.msg.exec()
 
     def open_subcircuit(self):
         """
@@ -628,7 +628,7 @@ def open_nghdl(self):
                                  'Please make sure it is installed')
             self.obj_appconfig.print_error('Error while opening NGHDL. ' +
                                            'Please make sure it is installed')
-            self.msg.exec_()
+            self.msg.exec()
 
     def open_makerchip(self):
         """
@@ -684,7 +684,7 @@ def open_OMedit(self):
                     'Current project does not contain any Ngspice file. ' +
                     'Please create Ngspice file with extension .cir.out'
                 )
-                self.msg.exec_()
+                self.msg.exec()
         else:
             self.msg = QtWidgets.QErrorMessage()
             self.msg.setModal(True)
@@ -693,7 +693,7 @@ def open_OMedit(self):
                 'Please select the project first. You can either ' +
                 'create a new project or open an existing project'
             )
-            self.msg.exec_()
+            self.msg.exec()
 
     def open_OMoptim(self):
         """
@@ -726,11 +726,11 @@ def open_OMoptim(self):
                 "https://www.openmodelica.org/download/download-windows"
                 ">OpenModelica Windows</a> and install latest version.<br/>"
             )
-            self.msg.setTextFormat(QtCore.Qt.RichText)
+            self.msg.setTextFormat(QtCore.Qt.TextFormat.RichText)
             self.msg.setText(self.msgContent)
             self.msg.setWindowTitle("Error Message")
             self.obj_appconfig.print_info(self.msgContent)
-            self.msg.exec_()
+            self.msg.exec()
 
     def open_conToeSim(self):
         print("Function : Schematics converter")
@@ -783,7 +783,7 @@ def __init__(self, *args):
         self.obj_projectExplorer = ProjectExplorer.ProjectExplorer()
 
         # Adding content to vertical middle Split.
-        self.middleSplit.setOrientation(QtCore.Qt.Vertical)
+        self.middleSplit.setOrientation(QtCore.Qt.Orientation.Vertical)
         self.middleSplit.addWidget(self.obj_dockarea)
         self.middleSplit.addWidget(self.noteArea)
 
@@ -817,7 +817,7 @@ def main(args):
 
     splash_pix = QtGui.QPixmap(init_path + 'images/splash_screen_esim.png')
     splash = QtWidgets.QSplashScreen(
-        appView, splash_pix, QtCore.Qt.WindowStaysOnTopHint
+        appView, splash_pix, QtCore.Qt.WindowType.WindowStaysOnTopHint
     )
     splash.setMask(splash_pix.mask())
     splash.setDisabled(True)
@@ -842,7 +842,7 @@ def main(args):
     else:
         appView.obj_workspace.show()
 
-    sys.exit(app.exec_())
+    sys.exit(app.exec())
 
 
 # Call main function