# -*- coding: utf-8 -*-

# Copyright (c) 2014 - 2019 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing the eric plug-in wizard plug-in.
"""


import os

from PyQt5.QtCore import QObject
from PyQt5.QtWidgets import QDialog

from E5Gui.E5Application import e5App
from E5Gui.E5Action import E5Action
from E5Gui import E5MessageBox

import UI.Info

# Start-of-Header
name = "eric plug-in Wizard Plug-in"
author = "Detlev Offenbach <detlev@die-offenbachs.de>"
autoactivate = True
deactivateable = True
version = UI.Info.VersionOnly
className = "WizardEricPluginWizard"
packageName = "__core__"
shortDescription = "Wizard for the creation of an eric plug-in file."
longDescription = (
    """This plug-in implements a wizard to generate code for"""
    """ an eric plug-in main script file."""
)
needsRestart = False
pyqtApi = 2
# End-of-Header

error = ""


class WizardEricPluginWizard(QObject):
    """
    Class implementing the eric plug-in wizard plug-in.
    """
    def __init__(self, ui):
        """
        Constructor
        
        @param ui reference to the user interface object (UI.UserInterface)
        """
        super(WizardEricPluginWizard, self).__init__(ui)
        self.__ui = ui
        self.__action = None
    
    def __initialize(self):
        """
        Private slot to (re)initialize the plug-in.
        """
        self.__act = None
    
    def activate(self):
        """
        Public method to activate this plug-in.
        
        @return tuple of None and activation status (boolean)
        """
        self.__initAction()
        self.__initMenu()
        
        return None, True
    
    def deactivate(self):
        """
        Public method to deactivate this plug-in.
        """
        menu = self.__ui.getMenu("wizards")
        if menu:
            menu.removeAction(self.__action)
        self.__ui.removeE5Actions([self.__action], 'wizards')
    
    def __initAction(self):
        """
        Private method to initialize the action.
        """
        self.__action = E5Action(
            self.tr('eric Plug-in Wizard'),
            self.tr('&eric Plug-in Wizard...'),
            0, 0, self,
            'wizards_eric_plugin')
        self.__action.setStatusTip(self.tr('eric Plug-in Wizard'))
        self.__action.setWhatsThis(self.tr(
            """<b>eric Plug-in Wizard</b>"""
            """<p>This wizard opens a dialog for entering all the parameters"""
            """ needed to create the basic contents of an eric plug-in file."""
            """ The generated code is inserted at the current cursor"""
            """ position.</p>"""
        ))
        self.__action.triggered.connect(self.__handle)
        
        self.__ui.addE5Actions([self.__action], 'wizards')

    def __initMenu(self):
        """
        Private method to add the actions to the right menu.
        """
        menu = self.__ui.getMenu("wizards")
        if menu:
            menu.addAction(self.__action)
    
    def __callForm(self, editor):
        """
        Private method to display a dialog and get the code.
        
        @param editor reference to the current editor
        @return generated code (string), the plug-in package name (string)
            and a flag indicating success (boolean)
        """
        from WizardPlugins.EricPluginWizard.PluginWizardDialog import (
            PluginWizardDialog
        )
        dlg = PluginWizardDialog(None)
        if dlg.exec_() == QDialog.Accepted:
            return (dlg.getCode(), dlg.packageName(), True)
        else:
            return (None, "", False)
        
    def __handle(self):
        """
        Private method to handle the wizards action.
        """
        editor = e5App().getObject("ViewManager").activeWindow()
        
        if editor is None:
            E5MessageBox.critical(
                self.__ui,
                self.tr('No current editor'),
                self.tr('Please open or create a file first.'))
        else:
            code, packageName, ok = self.__callForm(editor)
            if ok:
                line, index = editor.getCursorPosition()
                # It should be done on this way to allow undo
                editor.beginUndoAction()
                editor.insertAt(code, line, index)
                editor.endUndoAction()
                if not editor.getFileName():
                    editor.setLanguage("dummy.py")
                
                if packageName:
                    project = e5App().getObject("Project")
                    packagePath = os.path.join(project.getProjectPath(),
                                               packageName)
                    if not os.path.exists(packagePath):
                        try:
                            os.mkdir(packagePath)
                        except OSError as err:
                            E5MessageBox.critical(
                                self,
                                self.tr("Create Package"),
                                self.tr(
                                    """<p>The package directory <b>{0}</b>"""
                                    """ could not be created. Aborting..."""
                                    """</p><p>Reason: {1}</p>""")
                                .format(packagePath, str(err)))
                            return
                    packageFile = os.path.join(packagePath, "__init__.py")
                    if not os.path.exists(packageFile):
                        try:
                            f = open(packageFile, "w", encoding="utf-8")
                            f.close()
                        except IOError as err:
                            E5MessageBox.critical(
                                self,
                                self.tr("Create Package"),
                                self.tr(
                                    """<p>The package file <b>{0}</b> could"""
                                    """ not be created. Aborting...</p>"""
                                    """<p>Reason: {1}</p>""")
                                .format(packageFile, str(err)))
                            return
                    project.appendFile(packageFile)
                    project.saveProject()
                    e5App().getObject("ViewManager").openSourceFile(
                        packageFile)

#
# eflag: noqa = M801
