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

# Copyright (c) 2012 - 2020 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing an importer for Apple Safari bookmarks.
"""

import os
import plistlib

from PyQt5.QtCore import QCoreApplication, QDate, Qt

from .BookmarksImporter import BookmarksImporter

import UI.PixmapCache
import Globals


def getImporterInfo(sourceId):
    """
    Module function to get information for the given source id.
    
    @param sourceId id of the browser ("chrome" or "chromium")
    @return tuple with an icon (QPixmap), readable name (string), name of
        the default bookmarks file (string), an info text (string),
        a prompt (string) and the default directory of the bookmarks file
        (string)
    @exception ValueError raised to indicate an invalid browser ID
    """
    if sourceId == "safari":
        if Globals.isWindowsPlatform():
            standardDir = os.path.expandvars(
                "%APPDATA%\\Apple Computer\\Safari")
        elif Globals.isMacPlatform():
            standardDir = os.path.expanduser("~/Library/Safari")
        else:
            standardDir = ""
        return (
            UI.PixmapCache.getPixmap("safari"),
            "Apple Safari",
            "Bookmarks.plist",
            QCoreApplication.translate(
                "SafariImporter",
                """Apple Safari stores its bookmarks in the"""
                """ <b>Bookmarks.plist</b> file. This file is usually"""
                """ located in"""),
            QCoreApplication.translate(
                "SafariImporter",
                """Please choose the file to begin importing bookmarks."""),
            standardDir,
        )
    else:
        raise ValueError(
            "Unsupported browser ID given ({0}).".format(sourceId))


class SafariImporter(BookmarksImporter):
    """
    Class implementing the Apple Safari bookmarks importer.
    """
    def __init__(self, sourceId="", parent=None):
        """
        Constructor
        
        @param sourceId source ID (string)
        @param parent reference to the parent object (QObject)
        """
        super(SafariImporter, self).__init__(sourceId, parent)
        
        self.__fileName = ""
    
    def setPath(self, path):
        """
        Public method to set the path of the bookmarks file or directory.
        
        @param path bookmarks file or directory (string)
        """
        self.__fileName = path
    
    def open(self):
        """
        Public method to open the bookmarks file.
        
        @return flag indicating success (boolean)
        """
        if not os.path.exists(self.__fileName):
            self._error = True
            self._errorString = self.tr(
                "File '{0}' does not exist."
            ).format(self.__fileName)
            return False
        return True
    
    def importedBookmarks(self):
        """
        Public method to get the imported bookmarks.
        
        @return imported bookmarks (BookmarkNode)
        """
        try:
            f = open(self.__fileName, "rb")
            bookmarksDict = plistlib.load(f)
            f.close()
        except (plistlib.InvalidFileException, EnvironmentError) as err:
            self._error = True
            self._errorString = self.tr(
                "Bookmarks file cannot be read.\nReason: {0}".format(str(err)))
            return None
        
        from ..BookmarkNode import BookmarkNode
        importRootNode = BookmarkNode(BookmarkNode.Folder)
        if (
            bookmarksDict["WebBookmarkFileVersion"] == 1 and
            bookmarksDict["WebBookmarkType"] == "WebBookmarkTypeList"
        ):
            self.__processChildren(bookmarksDict["Children"], importRootNode)
        
        if self._id == "safari":
            importRootNode.title = self.tr("Apple Safari Import")
        else:
            importRootNode.title = self.tr(
                "Imported {0}"
            ).format(QDate.currentDate().toString(Qt.SystemLocaleShortDate))
        return importRootNode
    
    def __processChildren(self, children, rootNode):
        """
        Private method to process the list of children.
        
        @param children list of child nodes to be processed (list of dict)
        @param rootNode node to add the bookmarks to (BookmarkNode)
        """
        from ..BookmarkNode import BookmarkNode
        for child in children:
            if child["WebBookmarkType"] == "WebBookmarkTypeList":
                folder = BookmarkNode(BookmarkNode.Folder, rootNode)
                folder.title = child["Title"].replace("&", "&&")
                if "Children" in child:
                    self.__processChildren(child["Children"], folder)
            elif child["WebBookmarkType"] == "WebBookmarkTypeLeaf":
                url = child["URLString"]
                if url.startswith(("place:", "about:")):
                    continue
                
                bookmark = BookmarkNode(BookmarkNode.Bookmark, rootNode)
                bookmark.url = url
                bookmark.title = (
                    child["URIDictionary"]["title"].replace("&", "&&")
                )
