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

# Copyright (c) 2012 - 2019 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing a dialog for importing bookmarks from other sources.
"""


import os

from PyQt5.QtCore import pyqtSlot, Qt, QSize
from PyQt5.QtWidgets import QDialog, QListWidgetItem

from E5Gui import E5MessageBox
from E5Gui.E5PathPicker import E5PathPickerModes

from .Ui_BookmarksImportDialog import Ui_BookmarksImportDialog

from . import BookmarksImporters

import Globals


class BookmarksImportDialog(QDialog, Ui_BookmarksImportDialog):
    """
    Class implementing a dialog for importing bookmarks from other sources.
    """
    SourcesListIdRole = Qt.UserRole
    
    def __init__(self, parent=None):
        """
        Constructor
        
        @param parent reference to the parent widget (QWidget)
        """
        super(BookmarksImportDialog, self).__init__(parent)
        self.setupUi(self)
        
        self.filePicker.setMode(E5PathPickerModes.OpenFileMode)
        
        self.sourcesList.setIconSize(QSize(48, 48))
        for icon, displayText, idText in BookmarksImporters.getImporters():
            itm = QListWidgetItem(icon, displayText, self.sourcesList)
            itm.setData(self.SourcesListIdRole, idText)
        
        self.__currentPage = 0
        self.__selectedSource = ""
        self.__topLevelBookmarkNode = None
        self.__sourceFile = ""
        self.__sourceDir = ""
        
        self.pagesWidget.setCurrentIndex(self.__currentPage)
        self.__enableNextButton()
    
    def __enableNextButton(self):
        """
        Private slot to set the enabled state of the next button.
        """
        if self.__currentPage == 0:
            self.nextButton.setEnabled(
                len(self.sourcesList.selectedItems()) == 1)
        elif self.__currentPage == 1:
            self.nextButton.setEnabled(self.filePicker.text() != "")
    
    @pyqtSlot()
    def on_sourcesList_itemSelectionChanged(self):
        """
        Private slot to handle changes of the selection of the import source.
        """
        self.__enableNextButton()
    
    @pyqtSlot(str)
    def on_filePicker_textChanged(self, txt):
        """
        Private slot handling changes of the file to import bookmarks form.
        
        @param txt text of the line edit (string)
        """
        self.__enableNextButton()
    
    @pyqtSlot()
    def on_nextButton_clicked(self):
        """
        Private slot to switch to the next page.
        """
        if self.sourcesList.currentItem() is None:
            return
        
        if self.__currentPage == 0:
            self.__selectedSource = self.sourcesList.currentItem().data(
                self.SourcesListIdRole)
            (pixmap, sourceName, self.__sourceFile, info, prompt,
             self.__sourceDir) = BookmarksImporters.getImporterInfo(
                self.__selectedSource)
            
            self.iconLabel.setPixmap(pixmap)
            self.importingFromLabel.setText(
                self.tr("<b>Importing from {0}</b>").format(sourceName))
            self.fileLabel1.setText(info)
            self.fileLabel2.setText(prompt)
            self.standardDirLabel.setText(
                "<i>{0}</i>".format(self.__sourceDir))
            
            self.nextButton.setText(self.tr("Finish"))
            
            self.__currentPage += 1
            self.pagesWidget.setCurrentIndex(self.__currentPage)
            self.__enableNextButton()
            
            if self.__selectedSource == "ie":
                self.filePicker.setMode(E5PathPickerModes.DirectoryMode)
            else:
                self.filePicker.setMode(E5PathPickerModes.OpenFileMode)
                if Globals.isMacPlatform():
                    fileFilter = "*{0}".format(
                        os.path.splitext(self.__sourceFile)[1])
                else:
                    fileFilter = self.__sourceFile
                self.filePicker.setFilters(fileFilter)
            self.filePicker.setDefaultDirectory(self.__sourceDir)
        
        elif self.__currentPage == 1:
            if self.filePicker.text() == "":
                return
            
            importer = BookmarksImporters.getImporter(self.__selectedSource)
            importer.setPath(self.filePicker.text())
            if importer.open():
                self.__topLevelBookmarkNode = importer.importedBookmarks()
            if importer.error():
                E5MessageBox.critical(
                    self,
                    self.tr("Error importing bookmarks"),
                    importer.errorString())
                return
            
            self.accept()
    
    @pyqtSlot()
    def on_cancelButton_clicked(self):
        """
        Private slot documentation goes here.
        """
        self.reject()
    
    def getImportedBookmarks(self):
        """
        Public method to get the imported bookmarks.
        
        @return top level bookmark (BookmarkNode)
        """
        return self.__topLevelBookmarkNode
