# =========================================================================
#          FILE: Application.py
#
#         USAGE: ---
#
#   DESCRIPTION: This main file use to start the Application
#
#       OPTIONS: ---
#  REQUIREMENTS: ---
#          BUGS: ---
#         NOTES: ---
#        AUTHOR: Fahim Khan, fahim.elex@gmail.com
#      MODIFIED: Rahul Paknikar, rahulp@iitb.ac.in
#  ORGANIZATION: eSim Team at FOSSEE, IIT Bombay
#       CREATED: Tuesday 24 February 2015
#      REVISION: Sunday 13 December 2020
# =========================================================================

import os

if os.name == 'nt':     # noqa
    from frontEnd import pathmagic  # noqa:F401
    init_path = ''
else:
    import pathmagic    # noqa:F401
    init_path = '../../'

from PyQt5 import QtGui, QtCore, QtWidgets
from configuration.Appconfig import Appconfig
from projManagement.openProject import OpenProjectInfo
from projManagement.newProject import NewProjectInfo
from projManagement.Kicad import Kicad
from projManagement.Validation import Validation
from projManagement import Worker
from frontEnd import ProjectExplorer
from frontEnd import Workspace
from frontEnd import DockArea
from PyQt5.Qt import QSize
import shutil
import time
import sys


# Its our main window of application.
class Application(QtWidgets.QMainWindow):
    """This class initializes all objects used in this file."""
    global project_name

    def __init__(self, *args):
        """Initialize main Application window."""

        # Calling __init__ of super class
        QtWidgets.QMainWindow.__init__(self, *args)

        # Flag for mode of operation. Default is set to offline mode.
        self.online_flag = False

        # Creating require Object
        self.obj_workspace = Workspace.Workspace()
        self.obj_Mainview = MainView()
        self.obj_kicad = Kicad(self.obj_Mainview.obj_dockarea)
        self.obj_appconfig = Appconfig()
        self.obj_validation = Validation()
        # Initialize all widget
        self.setCentralWidget(self.obj_Mainview)
        self.initToolBar()

        self.setGeometry(self.obj_appconfig._app_xpos,
                         self.obj_appconfig._app_ypos,
                         self.obj_appconfig._app_width,
                         self.obj_appconfig._app_heigth)
        self.setWindowTitle(
            self.obj_appconfig._APPLICATION + "-" + self.obj_appconfig._VERSION
        )
        self.showMaximized()
        self.setWindowIcon(QtGui.QIcon(init_path + 'images/logo.png'))

        self.systemTrayIcon = QtWidgets.QSystemTrayIcon(self)
        self.systemTrayIcon.setIcon(QtGui.QIcon(init_path + 'images/logo.png'))
        self.systemTrayIcon.setVisible(True)

    def initToolBar(self):
        """
        This function initializes Tool Bars.
        It setups the icons, short-cuts and defining functonality for:

            - Top-tool-bar (New project, Open project, Close project, \
                Mode switch, Help option)
            - Left-tool-bar (Open Schematic, Convert KiCad to NgSpice, \
                Simuation, Model Editor, Subcircuit, NGHDL, Modelica \
                Converter, OM Optimisation)
        """
        # Top Tool bar
        self.newproj = QtWidgets.QAction(
            QtGui.QIcon(init_path + 'images/newProject.png'),
            '<b>New Project</b>', self
        )
        self.newproj.setShortcut('Ctrl+N')
        self.newproj.triggered.connect(self.new_project)

        self.openproj = QtWidgets.QAction(
            QtGui.QIcon(init_path + 'images/openProject.png'),
            '<b>Open Project</b>', self
        )
        self.openproj.setShortcut('Ctrl+O')
        self.openproj.triggered.connect(self.open_project)

        self.closeproj = QtWidgets.QAction(
            QtGui.QIcon(init_path + 'images/closeProject.png'),
            '<b>Close Project</b>', self
        )
        self.closeproj.setShortcut('Ctrl+X')
        self.closeproj.triggered.connect(self.close_project)

        self.wrkspce = QtWidgets.QAction(
            QtGui.QIcon(init_path + 'images/workspace.ico'),
            '<b>Change Workspace</b>', self
        )
        self.wrkspce.setShortcut('Ctrl+W')
        self.wrkspce.triggered.connect(self.change_workspace)

        self.switchmode = None
        self.validate_mode()
        if self.online_flag is True:
            self.switchmode = QtWidgets.QAction(QtGui.QIcon(
                init_path + 'images/online.png'),
                '<b>Go Offline</b>', self
            )
        elif self.online_flag is False:
            self.switchmode = QtWidgets.QAction(QtGui.QIcon(
                init_path + 'images/offline.png'),
                '<b>Go Online</b>', self
            )
        elif self.online_flag is None:
            self.switchmode = QtWidgets.QAction(QtGui.QIcon(
                init_path + 'images/disable.png'),
                '<b>Mode switching has been disabled. ' +
                'Default mode set to offline</b>', self
            )
            self.switchmode.setEnabled(False)
        self.switchmode.setShortcut('Ctrl+G')
        self.switchmode.triggered.connect(self.change_mode)

        self.helpfile = QtWidgets.QAction(
            QtGui.QIcon(init_path + 'images/helpProject.png'),
            '<b>Help</b>', self
        )
        self.helpfile.setShortcut('Ctrl+H')
        self.helpfile.triggered.connect(self.help_project)

        self.topToolbar = self.addToolBar('Top Tool Bar')
        self.topToolbar.addAction(self.newproj)
        self.topToolbar.addAction(self.openproj)
        self.topToolbar.addAction(self.closeproj)
        self.topToolbar.addAction(self.wrkspce)
        self.topToolbar.addAction(self.switchmode)
        self.topToolbar.addAction(self.helpfile)

        # This part is setting fossee logo to the right
        # corner in the application window.
        self.spacer = QtWidgets.QWidget()
        self.spacer.setSizePolicy(
            QtWidgets.QSizePolicy.Expanding,
            QtWidgets.QSizePolicy.Expanding)
        self.topToolbar.addWidget(self.spacer)
        self.logo = QtWidgets.QLabel()
        self.logopic = QtGui.QPixmap(
            os.path.join(
                os.path.abspath(''), init_path + 'images', 'fosseeLogo.png'
            ))
        self.logopic = self.logopic.scaled(
            QSize(150, 150), QtCore.Qt.KeepAspectRatio)
        self.logo.setPixmap(self.logopic)
        self.logo.setStyleSheet("padding:0 15px 0 0;")
        self.topToolbar.addWidget(self.logo)

        # Left Tool bar Action Widget
        self.kicad = QtWidgets.QAction(
            QtGui.QIcon(init_path + 'images/kicad.png'),
            '<b>Open Schematic</b>', self
        )
        self.kicad.triggered.connect(self.obj_kicad.openSchematic)

        self.conversion = QtWidgets.QAction(
            QtGui.QIcon(init_path + 'images/ki-ng.png'),
            '<b>Convert Kicad to Ngspice</b>', self
        )
        self.conversion.triggered.connect(self.obj_kicad.openKicadToNgspice)

        self.ngspice = QtWidgets.QAction(
            QtGui.QIcon(init_path + 'images/ngspice.png'),
            '<b>Simulation</b>', self
        )
        self.ngspice.triggered.connect(self.open_ngspice)

        self.model = QtWidgets.QAction(
            QtGui.QIcon(init_path + 'images/model.png'),
            '<b>Model Editor</b>', self
        )
        self.model.triggered.connect(self.open_modelEditor)

        self.subcircuit = QtWidgets.QAction(
            QtGui.QIcon(init_path + 'images/subckt.png'),
            '<b>Subcircuit</b>', self
        )
        self.subcircuit.triggered.connect(self.open_subcircuit)

        self.nghdl = QtWidgets.QAction(
            QtGui.QIcon(init_path + 'images/nghdl.png'), '<b>Nghdl</b>', self
        )
        self.nghdl.triggered.connect(self.open_nghdl)

        self.omedit = QtWidgets.QAction(
            QtGui.QIcon(init_path + 'images/omedit.png'),
            '<b>Modelica Converter</b>', self
        )
        self.omedit.triggered.connect(self.open_OMedit)

        self.omoptim = QtWidgets.QAction(
            QtGui.QIcon(init_path + 'images/omoptim.png'),
            '<b>OM Optimisation</b>', self
        )
        self.omoptim.triggered.connect(self.open_OMoptim)

        # Adding Action Widget to tool bar
        self.lefttoolbar = QtWidgets.QToolBar('Left ToolBar')
        self.addToolBar(QtCore.Qt.LeftToolBarArea, self.lefttoolbar)
        self.lefttoolbar.addAction(self.kicad)
        self.lefttoolbar.addAction(self.conversion)
        self.lefttoolbar.addAction(self.ngspice)
        self.lefttoolbar.addAction(self.model)
        self.lefttoolbar.addAction(self.subcircuit)
        self.lefttoolbar.addAction(self.nghdl)
        self.lefttoolbar.addAction(self.omedit)
        self.lefttoolbar.addAction(self.omoptim)
        self.lefttoolbar.setOrientation(QtCore.Qt.Vertical)
        self.lefttoolbar.setIconSize(QSize(40, 40))

    def closeEvent(self, event):
        '''
        This function closes the ongoing program (process).
        When exit button is pressed a Message box pops out with \
        exit message and buttons 'Yes', 'No'.

            1. If 'Yes' is pressed:
                - check that program (process) in procThread_list \
                  (a list made in Appconfig.py):

                    - if available it terminates that program.
                    - if the program (process) is not available, \
                      then check it in process_obj (a list made in \
                      Appconfig.py) and if found, it closes the program.

            2. If 'No' is pressed:
                - the program just continues as it was doing earlier.
        '''
        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
        )

        if reply == QtWidgets.QMessageBox.Yes:
            for proc in self.obj_appconfig.procThread_list:
                try:
                    proc.terminate()
                except BaseException:
                    pass
            try:
                for process_object in self.obj_appconfig.process_obj:
                    try:
                        process_object.close()
                    except BaseException:
                        pass
            except BaseException:
                pass

            # Check if "Open project" and "New project" window is open.
            # If yes, just close it when application is closed.
            try:
                self.project.close()
            except BaseException:
                pass
            event.accept()
            self.systemTrayIcon.showMessage('Exit', 'eSim is Closed.')

        elif reply == QtWidgets.QMessageBox.No:
            event.ignore()

    def new_project(self):
        """This function call New Project Info class."""
        text, ok = QtWidgets.QInputDialog.getText(
            self, 'New Project Info', 'Enter Project Name:'
        )
        updated = False

        if ok:
            self.projname = (str(text))
            self.project = NewProjectInfo()
            directory, filelist = self.project.createProject(self.projname)

            if directory and filelist:
                self.obj_Mainview.obj_projectExplorer.addTreeNode(
                    directory, filelist
                )
                updated = True

        if not updated:
            print("No new project created")
            self.obj_appconfig.print_info('No new project created')
            try:
                self.obj_appconfig.print_info(
                    'Current project is : ' +
                    self.obj_appconfig.current_project["ProjectName"]
                )
            except BaseException:
                pass

    def open_project(self):
        """This project call Open Project Info class."""
        print("Function : Open Project")
        self.project = OpenProjectInfo()
        try:
            directory, filelist = self.project.body()
            self.obj_Mainview.obj_projectExplorer.addTreeNode(
                directory, filelist)
        except BaseException:
            pass

    def close_project(self):
        """
        This function closes the saved project.
        It first checks whether project (file) is present in list.

            - If present:
                - it first kills that process-id.
                - closes that file.
                - Shows message "Current project <path_to_file> is closed"

            - If not present: pass
        """
        print("Function : Close Project")
        current_project = self.obj_appconfig.current_project['ProjectName']
        if current_project is None:
            pass
        else:
            temp = self.obj_appconfig.current_project['ProjectName']
            for pid in self.obj_appconfig.proc_dict[temp]:
                try:
                    os.kill(pid, 9)
                except BaseException:
                    pass
            self.obj_Mainview.obj_dockarea.closeDock()
            self.obj_appconfig.current_project['ProjectName'] = None
            self.systemTrayIcon.showMessage(
                'Close', 'Current project ' +
                os.path.basename(current_project) + ' is Closed.'
            )

    def change_workspace(self):
        """
        This function call changes Workspace
        """
        print("Function : Change Workspace")
        self.obj_workspace.returnWhetherClickedOrNot(self)
        self.hide()
        self.obj_workspace.show()

    def validate_mode(self):
        """
        This functions checks whether proper fp-lib-table* files are \
        available or not. If not, then move appropriate files from \
        library/supportFiles folder and set `self.online_flag` accordingly.

        @params

        @return
            None
        """
        remove = False

        if self.obj_appconfig.kicad_path is not None:

            if not os.path.exists(
                self.obj_appconfig.kicad_path + "/fp-lib-table"
            ):
                remove = True
            elif os.path.exists(self.obj_appconfig.kicad_path +
                                "/fp-lib-table-offline"):
                if os.path.exists(self.obj_appconfig.kicad_path +
                                  "/fp-lib-table-online"):
                    remove = True
                    os.remove(self.obj_appconfig.kicad_path +
                              "/fp-lib-table")
                else:
                    self.online_flag = True
            else:
                if not os.path.exists(self.obj_appconfig.kicad_path +
                                      "/fp-lib-table-online"):
                    remove = True
                    os.remove(self.obj_appconfig.kicad_path +
                              "/fp-lib-table")
                else:
                    self.online_flag = False

            if remove:
                # Remove invalid files
                if os.path.exists(
                    self.obj_appconfig.kicad_path + "/fp-lib-table-offline"
                ):
                    os.remove(self.obj_appconfig.kicad_path +
                              "/fp-lib-table-offline")

                if os.path.exists(
                    self.obj_appconfig.kicad_path + "/fp-lib-table-online"
                ):
                    os.remove(self.obj_appconfig.kicad_path +
                              "/fp-lib-table-online")

                # Restore original files
                shutil.copy(
                    init_path + 'library/supportFiles/fp-lib-table-online',
                    self.obj_appconfig.kicad_path + "/"
                )
                shutil.copy(
                    init_path + 'library/supportFiles/fp-lib-table',
                    self.obj_appconfig.kicad_path + "/"
                )

                self.online_flag = False
        else:
            self.online_flag = None

    def change_mode(self):
        """
        - This function is used for changing mode of operation for KiCad. \
        - There are three modes of operation :
            - online
            - offline
            - disable

        - If none of the KiCad tools (associated with eSim) are \
          open, then validate this mode by calling the function \
          `validate_mode` and depending on online_flag, swap \
          appropriate fp-lib-table files.
        - If any of the KiCad tools (associated with eSim) is open, \
          then ask user to close all these tools.
        - If `online_flag` is `None`, then disable this feature.

        @params

        @return
            None
        """
        if not self.obj_kicad.check_open_schematic():
            self.validate_mode()
            if self.online_flag is True:
                os.rename(
                    self.obj_appconfig.kicad_path + "/fp-lib-table",
                    self.obj_appconfig.kicad_path +
                    "/fp-lib-table-online"
                )
                os.rename(
                    self.obj_appconfig.kicad_path +
                    "/fp-lib-table-offline",
                    self.obj_appconfig.kicad_path + "/fp-lib-table"
                )
                self.switchmode.setIcon(
                    QtGui.QIcon(init_path + 'images/offline.png')
                )
                self.switchmode.setText('<b>Go Online</b>')
                self.switchmode.setEnabled(True)
                self.online_flag = False

            elif self.online_flag is False:
                os.rename(
                    self.obj_appconfig.kicad_path + "/fp-lib-table",
                    self.obj_appconfig.kicad_path +
                    "/fp-lib-table-offline"
                )
                os.rename(
                    self.obj_appconfig.kicad_path +
                    "/fp-lib-table-online",
                    self.obj_appconfig.kicad_path + "/fp-lib-table"
                )
                self.switchmode.setIcon(
                    QtGui.QIcon(init_path + 'images/online.png')
                )
                self.switchmode.setText('<b>Go Offline</b>')
                self.switchmode.setEnabled(True)
                self.online_flag = True

            elif self.online_flag is None:
                self.switchmode.setIcon(
                    QtGui.QIcon(init_path + 'images/disable.png')
                )
                self.switchmode.setText(
                    '<b>Mode switching has been ' +
                    'disabled. Default mode set to offline</b>.'
                )
                self.switchmode.setEnabled(False)
        else:
            self.msg = QtWidgets.QErrorMessage()
            self.msg.setWindowTitle("Error Message")
            self.msg.setModal(True)
            self.msg.showMessage(
                'Please save and close all the Kicad ' +
                'windows first, then change the mode'
            )
            self.msg.exec_()

    def help_project(self):
        """
        This function opens usermanual in dockarea.
            - It prints the message ""Function : Help""
            - Uses print_info() method of class Appconfig
              from Configuration/Appconfig.py file.
            - Call method usermanual() from ./DockArea.py.
        """
        print("Function : Help")
        self.obj_appconfig.print_info('Help is called')
        print("Current Project is : ", self.obj_appconfig.current_project)
        self.obj_Mainview.obj_dockarea.usermanual()

    def open_ngspice(self):
        """This Function execute ngspice on current project."""
        self.projDir = self.obj_appconfig.current_project["ProjectName"]

        if self.projDir is not None:
            self.obj_Mainview.obj_dockarea.ngspiceEditor(self.projDir)

            currTime = time.time()
            count = 0
            while True:
                try:
                    st = os.stat(os.path.join(self.projDir, "plot_data_i.txt"))
                    if st.st_mtime >= currTime:
                        break
                except Exception:
                    pass
                time.sleep(1)

                # Fail Safe ===>
                count += 1
                if count >= 10:
                    print(
                        "Ngspice taking too long for simulation. "
                        "Check netlist file to change simulation parameters."
                    )

                    self.msg = QtWidgets.QErrorMessage()
                    self.msg.setModal(True)
                    self.msg.setWindowTitle("Warning Message")
                    self.msg.showMessage(
                        'Ngspice taking too long for simulation. '
                        'Check netlist file to change simulation parameters.'
                    )
                    self.msg.exec_()

                    return

            # Calling Python Plotting
            try:
                self.obj_Mainview.obj_dockarea.plottingEditor()
            except Exception as e:
                self.msg = QtWidgets.QErrorMessage()
                self.msg.setModal(True)
                self.msg.setWindowTitle("Error Message")
                self.msg.showMessage(
                    'Error while opening python plotting Editor.'
                    ' Please look at console for more details.'
                )
                self.msg.exec_()
                print("Exception Message:", str(e))
                self.obj_appconfig.print_error('Exception Message : ' + str(e))

        else:
            self.msg = QtWidgets.QErrorMessage()
            self.msg.setModal(True)
            self.msg.setWindowTitle("Error Message")
            self.msg.showMessage(
                'Please select the project first.'
                ' You can either create new project or open existing project'
            )
            self.msg.exec_()

    def open_subcircuit(self):
        """
        This function opens 'subcircuit' option in left-tool-bar.
        When 'subcircuit' icon is clicked wich is present in
        left-tool-bar of main page:

            - Meassge shown on screen "Subcircuit editor is called".
            - 'subcircuiteditor()' function is called using object
              'obj_dockarea' of class 'Mainview'.
        """
        print("Function : Subcircuit editor")
        self.obj_appconfig.print_info('Subcircuit editor is called')
        self.obj_Mainview.obj_dockarea.subcircuiteditor()

    def open_nghdl(self):
        """
        This function calls NGHDL option in left-tool-bar.
        It uses validateTool() method from Validation.py:

            - If 'nghdl' is present in executables list then
              it passes command 'nghdl -e' to WorkerThread class of
              Worker.py.
            - If 'nghdl' is not present, then it shows error message.
        """
        print("Function : NGHDL")
        self.obj_appconfig.print_info('NGHDL is called')

        if self.obj_validation.validateTool('nghdl'):
            self.cmd = 'nghdl -e'
            self.obj_workThread = Worker.WorkerThread(self.cmd)
            self.obj_workThread.start()
        else:
            self.msg = QtWidgets.QErrorMessage()
            self.msg.setModal(True)
            self.msg.setWindowTitle('NGHDL Error')
            self.msg.showMessage('Error while opening NGHDL. ' +
                                 'Please make sure it is installed')
            self.obj_appconfig.print_error('Error while opening NGHDL. ' +
                                           'Please make sure it is installed')
            self.msg.exec_()

    def open_modelEditor(self):
        """
        This function opens model editor option in left-tool-bar.
        When model editor icon is clicked which is present in
        left-tool-bar of main page:

            - Meassge shown on screen "Model editor is called".
            - 'modeleditor()' function is called using object
              'obj_dockarea' of class 'Mainview'.
        """
        print("Function : Model editor")
        self.obj_appconfig.print_info('Model editor is called')
        self.obj_Mainview.obj_dockarea.modelEditor()

    def open_OMedit(self):
        """
        This function calls ngspice to OMEdit converter and then launch OMEdit.
        """
        self.obj_appconfig.print_info('OMEdit is called')
        self.projDir = self.obj_appconfig.current_project["ProjectName"]

        if self.projDir is not None:
            if self.obj_validation.validateCirOut(self.projDir):
                self.projName = os.path.basename(self.projDir)
                self.ngspiceNetlist = os.path.join(
                    self.projDir, self.projName + ".cir.out"
                )
                self.modelicaNetlist = os.path.join(
                    self.projDir, self.projName + ".mo"
                )

                """
                try:
                    # Creating a command for Ngspice to Modelica converter
                    self.cmd1 = "
                        python3 ../ngspicetoModelica/NgspicetoModelica.py "\
                            +self.ngspiceNetlist
                    self.obj_workThread1 = Worker.WorkerThread(self.cmd1)
                    self.obj_workThread1.start()
                    if self.obj_validation.validateTool("OMEdit"):
                        # Creating command to run OMEdit
                        self.cmd2 = "OMEdit "+self.modelicaNetlist
                        self.obj_workThread2 = Worker.WorkerThread(self.cmd2)
                        self.obj_workThread2.start()
                    else:
                        self.msg = QtWidgets.QMessageBox()
                        self.msgContent = "There was an error while
                            opening OMEdit.<br/>\
                        Please make sure OpenModelica is installed in your\
                            system. <br/>\
                        To install it on Linux : Go to\
                            <a href=https://www.openmodelica.org/download/\
                                download-linux>OpenModelica Linux</a> and  \
                                    install nigthly build release.<br/>\
                        To install it on Windows : Go to\
                         <a href=https://www.openmodelica.org/download/\
                        download-windows>OpenModelica Windows</a>\
                         and install latest version.<br/>"
                        self.msg.setTextFormat(QtCore.Qt.RichText)
                        self.msg.setText(self.msgContent)
                        self.msg.setWindowTitle("Missing OpenModelica")
                        self.obj_appconfig.print_info(self.msgContent)
                        self.msg.exec_()

                except Exception as e:
                    self.msg = QtWidgets.QErrorMessage()
                    self.msg.setModal(True)
                    self.msg.setWindowTitle(
                        "Ngspice to Modelica conversion error")
                    self.msg.showMessage(
                        'Unable to convert NgSpice netlist to\
                            Modelica netlist :'+str(e))
                    self.msg.exec_()
                    self.obj_appconfig.print_error(str(e))
                """

                self.obj_Mainview.obj_dockarea.modelicaEditor(self.projDir)

            else:
                self.msg = QtWidgets.QErrorMessage()
                self.msg.setModal(True)
                self.msg.setWindowTitle("Missing Ngspice netlist")
                self.msg.showMessage(
                    'Current project does not contain any Ngspice file. ' +
                    'Please create Ngspice file with extension .cir.out'
                )
                self.msg.exec_()
        else:
            self.msg = QtWidgets.QErrorMessage()
            self.msg.setModal(True)
            self.msg.setWindowTitle("Error Message")
            self.msg.showMessage(
                'Please select the project first. ' +
                'You can either create a new project or open existing project'
            )
            self.msg.exec_()

    def open_OMoptim(self):
        """
        This function uses validateTool() method from Validation.py:

            - If 'OMOptim' is present in executables list then
              it passes command 'OMOptim' to WorkerThread class of Worker.py
            - If 'OMOptim' is not present, then it shows error message with
              link to download it on Linux and Windows.
        """
        print("Function : OMOptim")
        self.obj_appconfig.print_info('OMOptim is called')
        # Check if OMOptim is installed
        if self.obj_validation.validateTool("OMOptim"):
            # Creating a command to run
            self.cmd = "OMOptim"
            self.obj_workThread = Worker.WorkerThread(self.cmd)
            self.obj_workThread.start()
        else:
            self.msg = QtWidgets.QMessageBox()
            self.msgContent = (
                "There was an error while opening OMOptim.<br/>"
                "Please make sure OpenModelica is installed in your"
                " system.<br/>"
                "To install it on Linux : Go to <a href="
                "https://www.openmodelica.org/download/download-linux"
                ">OpenModelica Linux</a> and install nightly build"
                " release.<br/>"
                "To install it on Windows : Go to <a href="
                "https://www.openmodelica.org/download/download-windows"
                ">OpenModelica Windows</a> and install latest version.<br/>"
            )
            self.msg.setTextFormat(QtCore.Qt.RichText)
            self.msg.setText(self.msgContent)
            self.msg.setWindowTitle("Error Message")
            self.obj_appconfig.print_info(self.msgContent)
            self.msg.exec_()


# This class initialize the Main View of Application
class MainView(QtWidgets.QWidget):
    """
    This class defines whole view and style of main page:

        - Position of tool bars:
            - Top tool bar.
            - Left tool bar.
        - Project explorer Area.
        - Dock area.
        - Console area.
    """

    def __init__(self, *args):
        # call init method of superclass
        QtWidgets.QWidget.__init__(self, *args)

        self.obj_appconfig = Appconfig()

        self.leftSplit = QtWidgets.QSplitter()
        self.middleSplit = QtWidgets.QSplitter()

        self.mainLayout = QtWidgets.QVBoxLayout()
        # Intermediate Widget
        self.middleContainer = QtWidgets.QWidget()
        self.middleContainerLayout = QtWidgets.QVBoxLayout()

        # Area to be included in MainView
        self.noteArea = QtWidgets.QTextEdit()
        self.noteArea.setReadOnly(True)
        self.obj_appconfig.noteArea['Note'] = self.noteArea
        self.obj_appconfig.noteArea['Note'].append(
            '        eSim Started......')
        self.obj_appconfig.noteArea['Note'].append('Project Selected : None')
        self.obj_appconfig.noteArea['Note'].append('\n')
        # CSS
        self.noteArea.setStyleSheet(" \
        QWidget { border-radius: 15px; border: 1px \
            solid gray; padding: 5px; } \
        ")

        self.obj_dockarea = DockArea.DockArea()
        self.obj_projectExplorer = ProjectExplorer.ProjectExplorer()

        # Adding content to vertical middle Split.
        self.middleSplit.setOrientation(QtCore.Qt.Vertical)
        self.middleSplit.addWidget(self.obj_dockarea)
        self.middleSplit.addWidget(self.noteArea)

        # Adding middle split to Middle Container Widget
        self.middleContainerLayout.addWidget(self.middleSplit)
        self.middleContainer.setLayout(self.middleContainerLayout)

        # Adding content of left split
        self.leftSplit.addWidget(self.obj_projectExplorer)
        self.leftSplit.addWidget(self.middleContainer)

        # Adding to main Layout
        self.mainLayout.addWidget(self.leftSplit)
        self.leftSplit.setSizes([int(self.width() / 4.5), self.height()])
        self.middleSplit.setSizes([self.width(), int(self.height() / 2)])
        self.setLayout(self.mainLayout)


# It is main function of the module and starts the application
def main(args):
    """
    The splash screen opened at the starting of screen is performed
    by this function.
    """
    print("Starting eSim......")
    app = QtWidgets.QApplication(args)
    app.setApplicationName("eSim")

    appView = Application()
    appView.hide()

    splash_pix = QtGui.QPixmap(init_path + 'images/splash_screen_esim.png')
    splash = QtWidgets.QSplashScreen(
        appView, splash_pix, QtCore.Qt.WindowStaysOnTopHint
    )
    splash.setMask(splash_pix.mask())
    splash.setDisabled(True)
    splash.show()

    appView.splash = splash
    appView.obj_workspace.returnWhetherClickedOrNot(appView)

    try:
        file = open(os.path.join(
            os.path.expanduser("~"), ".esim/workspace.txt"), 'r'
        )
        work = int(file.read(1))
        file.close()
    except IOError:
        work = 0

    if work != 0:
        appView.obj_workspace.defaultWorkspace()
    else:
        appView.obj_workspace.show()

    sys.exit(app.exec_())


# Call main function
if __name__ == '__main__':
    # Create and display the splash screen
    main(sys.argv)
