# coding:utf-8

# !/usr/bin/env python3
#
#  Copyright (c) 2007-2009 Canonical Ltd.
#
#  Author: Oliver Grawert <ogra@ubuntu.com>
#
#  Modifications 2013 from papoteur <papoteur@mageialinux-online.org>
#  and Geiger David <david.david@mageialinux-online.org>
#
#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License as
#  published by the Free Software Foundation; either version 2 of the
#  License, or (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software Foundation,
#  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.

#  Requires python3-parted


import sys
import importlib
try:
    from isodumper import version
except:
    import version


###########
# imports #
###########
import yui
import time

import os
import re
import gettext
from subprocess import Popen, PIPE
from pydbus import SystemBus
import gnupg
import datetime

import logging
import threading
from gi.repository import GLib
from queue import SimpleQueue
import psutil
import manatools.args as args
import manatools.ui.common as common
import manatools.ui.basedialog as basedialog


class NoUDisks2(Exception):
    pass


class UDisks2(object):
    BLOCK = 'org.freedesktop.UDisks2.Block'
    DRIVE = 'org.freedesktop.UDisks2.Drive'
    SERVICE = 'org.freedesktop.UDisks2'

    def __init__(self):
        self.bus = SystemBus()
        try:
            self.iface = self.bus.get(self.SERVICE)
        except:
            raise NoUDisks2()
        self._udisks2_obj_manager = self.iface["org.freedesktop.DBus.ObjectManager"]

    def find_devices(self):
        objects = self._udisks2_obj_manager.GetManagedObjects()
        re_drive = re.compile("(?P<path>.*?/drives/(?P<id>.*))")
        re_block = re.compile("(?P<path>.*?/block_devices/(?P<id>.*))")
        devs = [m.groupdict() for m in
                [re_drive.match(path) for path in (objects.keys())]
                if m]
        blocks = [m.groupdict() for m in
                  [re_block.match(path) for path in (objects.keys())]
                  if m]
        list = []

        for block in blocks:
            if not (self.SERVICE + '.Partition' in objects[block['path']]):  # we skip partition blocks
                for dev in devs:
                    if dev['path'] == objects[block['path']][self.BLOCK]['Drive']:
                        # we look for device which is referenced in Drive attribute of the current block
                        dev_obj = objects[dev['path']][self.DRIVE]
                        if (dev_obj['ConnectionBus'] == 'usb' or dev_obj['ConnectionBus'] == 'sdio') and \
                                (dev_obj['Removable'] == 1 or dev_obj[
                                    'MediaRemovable'] == 1):  # we keep only blocks where device ConnectionBus is sdio or usb
                            item = []
                            vend = dev_obj['Vendor']
                            if vend == "":
                                name = dev_obj['Model']
                            else:
                                name = vend + " " + dev_obj['Model']
                            path = '/dev/' + block['path'].split('/')[-1]
                            size = dev_obj['Size']
                            item.append(name)
                            item.append(path)
                            item.append(size)
                            list.append(item)
        return list

    def do_unmount(self, target):
        # keep only the end, like sdb
        target = os.path.basename(target)
        objects = self._udisks2_obj_manager.GetManagedObjects()
        re_block = re.compile('(?P<path>.*?/block_devices/(?P<id>.*))')
        blocks = [m.groupdict() for m in
                  [re_block.match(path) for path in (objects.keys())]
                  if m]
        for block in blocks:
            if (self.SERVICE + '.Partition' in objects[block['path']]):  # we skip non partition blocks
                # Table should be something like '/org/freedesktop/UDisks2/block_devices/sdb'
                if objects[block['path']][self.SERVICE + '.Partition']['Table'].split('/')[-1] == target:
                    if (self.SERVICE + '.Encrypted' in objects[block['path']]):  # Is the partition encrypted ?
                        path_to_encrypted = objects[block['path']][self.SERVICE + '.Encrypted']['CleartextDevice']
                        if path_to_encrypted != '/':
                            iface = self.bus.get(self.SERVICE, path_to_encrypted)
                            fs = iface[self.SERVICE + '.Filesystem']
                            if fs.MountPoints:  # partition is mounted
                                try:
                                    fs.Unmount({})
                                except GLib.GError as e:
                                    print(str(e))
                                    return False, _("A partition is busy. Try to free it before starting again.")
                                except:
                                    raise Exception(str(e))
                            iface = self.bus.get(self.SERVICE, block['path'])
                            fs = iface[self.SERVICE + '.Encrypted']
                            fs.Lock({})
                            logging.debug(f"Unmounting encryted {block['path']}")
                    else:
                        iface = self.bus.get(self.SERVICE, block['path'])
                        if self.SERVICE + '.Filesystem' in  objects[block['path']]:
                            fs = iface[self.SERVICE + '.Filesystem']
                            if fs.MountPoints:  # partition is mounted
                                logging.debug(f"Unmounting {block['path']}")
                                try:
                                    fs.Unmount({})
                                except GLib.GError as e:
                                    print(str(e))
                                    return False, _("A partition is busy. Try to free it before starting again.")
                                except:
                                    raise Exception(str(e))
                            else:
                                logging.debug(f"Not mounted {block['path']}")
        return True, ""


    def get_partitions(self, target):
        # keep only the end, like sdb
        target = os.path.basename(target)
        partitions = []
        objects = self._udisks2_obj_manager.GetManagedObjects()
        re_block = re.compile('(?P<path>.*?/block_devices/(?P<id>.*))')
        blocks = [m.groupdict() for m in
                  [re_block.match(path) for path in (objects.keys())]
                  if m]
        for block in blocks:
            if (self.SERVICE + '.Partition' in objects[block['path']]):  # we skip non partition blocks
                # Table should be something like '/org/freedesktop/UDisks2/block_devices/sdb'
                if objects[block['path']][self.SERVICE + '.Partition']['Table'].split('/')[-1] == target:
                    partition = objects[block['path']][self.SERVICE + '.Block']
                    partitions.append( {'device': bytes(partition['Device']).decode("UTF-8", "replace").strip("\0"),
                                        'label': partition['IdLabel'],
                                        'type': partition['IdType']})
        return partitions

    def eject(self, device):
        ''' device is expected like /dev/sda'''
        block = os.path.basename(device)
        iface = self.bus.get(self.SERVICE, '/org/freedesktop/UDisks2/block_devices/' + block)
        drive = iface.Get(self.BLOCK, "Drive")
        i_drive = self.bus.get(self.SERVICE, drive)
        i_drive.Eject({})

class Info(object):
    def __init__(self, title, richtext, text):
        self.title = title
        self.richtext = richtext
        self.text = text


class ParseCLI(args.AppArgs):
    def __init(self, command):
        super().__init__(command)


class IsoDumper(basedialog.BaseDialog):

    def get_devices(self, selected=None):
        self.list = self.u.find_devices()
        while len(self.list) == 0:
            if self.nodevDialog():
                self.list = self.u.find_devices()
            else:
                return False
        self.devicelist.addItem("", False)
        if len(self.list) > 0:
            for name, path, size in self.list:
                if size != 0:
                    label = str(name + ' (' + path.lstrip() + ') ' + self.sizeof_fmt(size))
                    sel = (label == selected) if selected else False
                    self.devicelist.addItem(label, sel)
            return True

    def udev_wait(self, operation):
        wait = Popen(["udevadm", "settle", "--timeout=15"], stderr=PIPE)
        wait.communicate()
        working = True
        while working:
            time.sleep(0.5)
            wait.poll()
            rc = wait.returncode
            if not (rc is None):
                wait = None
                working = False
        if rc != 0:
            self.return_state = False
            self.return_message = _("Timeout reached when {}".format(operation))
            return False
        return True

    def update_list(self):
        self.devicelist.deleteAllItems()
        self.get_devices()
        self.img_name = ""
        self.ima.setLabel(self.ChooseImage)
        self.backup_select.setLabel(self.ChooseImage)
        self.dialog.recalcLayout()

    def update_list_on_event(self):
        selitem = self.devicelist.selectedItem().label()
        self.devicelist.deleteAllItems()
        self.get_devices(selected = selitem)
        if self.devicelist.selectedItem().label() != selitem:
            self.restore()

    def refresh_signal(self, device, params):
        self.devicelist.deleteAllItems()
        self.get_devices()
        self.dialog.recalcLayout()

    def device_selected(self):
        selitem = self.devicelist.selectedItem()
        if selitem is not None:
            self.dev = selitem.label()
            if self.dev != "":
                for name, path, size in self.list:
                    if self.dev.startswith(name + ' (' + path.lstrip()):
                        self.deviceSize = size
                        self.device_name = name.rstrip().replace(' ', '')
                        message = _('Target Device: {}').format(self.dev)
                        self.logger(message)
                        logging.info(message)
                        partitions = self.u.get_partitions(self.dev.split('(')[1].split(')')[0])
                        # I18N: verb in singular 3rd person
                        self.logger(_("Contains this/these partition(s)"))
                        for partition in partitions:
                            self.logger(_("{device}: Type={type}, Label={label}").format(device=partition['device'],
                                                                    type=partition['type'],
                                                                    label=partition['label'],))
                        if len(partitions) == 0:
                            # I18N: None refers to partition (no partitions on the selected device)
                            self.logger(_("None"))
                        self.partition_cbox.setEnabled()
                        self.partition_cbox.setChecked(False)
                        self.backup_cbox.setEnabled()
                        self.backup_cbox.setChecked(False)
                        self.write_cbox.setEnabled()
                        self.write_cbox.setChecked(False)
                        self.cryptcb.setChecked(False)
                    break
            else:
                self.partition_cbox.setDisabled()
                self.partition_cbox.setChecked(False)
                self.backup_cbox.setDisabled()
                self.backup_cbox.setChecked(False)
                self.write_cbox.setDisabled()
                self.write_cbox.setChecked(False)
                self.cryptcb.setChecked(False)

    @staticmethod
    def sizeof_fmt(num):
        # I18N these are units for files size
        for unit in [_('B'), _('KiB'), _('MiB'), _('GiB'), _('TiB')]:
            if abs(num) < 1024.0:
                return "%3.3f %s" % (num, unit)
            num /= 1024.0
        return "%.1f %s" % (num, _('TiB'))

    def backup_choosed(self):
        # Add .img if not specified
        self.backup_img_name = yui.YUI.app().askForSaveFileName("", "*.img", _("Backup to:"))
        if self.backup_img_name != '':
            if not self.backup_img_name.lower().endswith('.img'):
                self.backup_img_name = self.backup_img_name + ".img"
            head, tail = os.path.split(self.backup_img_name)
            self.backup_dest = self.backup_img_name
            self.backup_select.setLabel(tail)
            self.dialog.recalcLayout()
            self.interface_active_state()
            self.backup_is_selected = True
        else:
            self.backup_is_selected = False

    def get_sum(self, source):
        self.return_state = False
        self.signature_checked = False
        logging.debug("Starting getting sum")
        #       Check if the sum file has a valid signature
        gpg = gnupg.GPG()
        gpg.encoding = 'utf-8'
        # Use Mageia public key
        mageia_keyid = "835E41F4EDCA7A90"
        self.sum_type = 'sha3'
        sig_file = "{}.{}.gpg".format(source, self.sum_type)
        self.source_file = "{}.{}".format(source, self.sum_type)
        keys_list = gpg.list_keys()
        key_present  = False
        for entry in keys_list:
            if (mageia_keyid == entry['keyid']):
                if entry['expires'] and (datetime.datetime.now().timestamp() > float(entry['expires'])):
                    logging.info("Mageia key expired, reloading")
                else:
                    logging.info("Mageia key already present")
                    key_present = True
                break
        try:
            if not key_present:
                gpg.recv_keys('pool.sks-keyservers.net', mageia_keyid)
            self.sum_check_searched = True
            with open(sig_file, 'rb') as g:
                self.signature_found = True
                verified = gpg.verify_file(g, close_file=False)
                if verified:
                    self.signature_checked = True
                    logging.debug("signature checked")
                    g.close()
                else:
                    g.seek(0)
                    verified = gpg.verify_file(g, self.source_file)
                    if verified:
                        self.signature_checked = True
                        logging.debug("Detached signature is OK")
                    else:
                        self.signature_checked = False
                        logging.warning("Signature is false")
        except Exception as e:
            self.signature_found = False
            logging.error(str(e))
            logging.info(_("Signature file {} not found\n" + _("or key expired")).format(sig_file))

    def do_format(self):
        #code, format_type, name = self.ask_format()
        if self.partition_cb.value() != "":
            self.operation = True
            format_type = list(self.format_type.keys())[list(self.format_type.values()).index(self.partition_cb.value())]
            if format_type == 'persist':
                self.emergency(_("Persistence partition is to use when writing a Live ISO image."))
                return
            target = self.dev.split('(')[1].split(')')[0]
            info = Info(_("Formatting confirmation in {}".format(self.partition_cb.value())), True, self.warning)
            if self.ask_YesOrNo(info):
                name = self.partition_label.value()
                if format_type == 'fat32':
                    name = name.upper()[:11]
                elif format_type == 'exfat' or format_type == 'ntfs':
                    name = name[:32]
                rc = self.raw_format(target, format_type, name)
                self.operation = False
                if rc == 0:
                    message = _('The device was formatted successfully.')
                    self.logger(message)
                    self.success()
                elif rc == 5:
                    message = _("An error occurred while creating a partition.")
                    self.logger(message)
                    self.emergency(message)
                elif rc == 127:
                    message = _('Authentication error.')
                    self.logger(message)
                    self.emergency(message)
                else:
                    message = _('An error {} occurred.'.format(rc))
                    self.emergency(message)
            self.initial_state()

    def initial_state(self):
        self.update_list()
        self.image_is_selected = False
        self.backup_is_selected = False
        self.backup_select.setDisabled()
        self.backup_cbox.setDisabled()
        self.backup_dest = ""
        self.backup_select.setLabel(self.ChooseImage)
        self.partition_cbox.setDisabled()
        self.ima.setDisabled()
        self.img_name = ""
        self.ima.setLabel(self.ChooseImage)
        self.write_cbox.setDisabled()
        self.devicelist.setEnabled()
        self.progress.setLabel(_("Progress"))
        self.progress.setValue(0)
        self.progress.setDisabled()
        self.refreshbt.setEnabled()
        self.partition_cb.setDisabled()
        self.partition_label.setDisabled()
        self.partition_label.setValue("")
        self.cryptcb.setDisabled()
        self.cryptkey.setDisabled()
        self.cryptkey.setValue("")
        self.start_bt.setDisabled()

    def raw_format(self, usb_path, fstype, label):
        self.u.do_unmount(usb_path)
        self.udev_wait(_("unmounting"))
        self.operation = True
        if os.geteuid() > 0:
            launcher = 'pkexec'
            self.process = Popen(
                [launcher, '/usr/bin/python3', '-u', '/usr/lib/isodumper/raw_format.py', '-d', usb_path, '-f', fstype,
                 '-l', label, '-u', str(os.geteuid()), '-g', str(os.getgid())], shell=False, stdout=PIPE,
                preexec_fn=os.setsid)
        else:
            self.process = Popen(
                ['/usr/bin/python3', '-u', '/usr/lib/isodumper/raw_format.py', '-d', usb_path, '-f', fstype, '-l',
                 label, '-u', str(os.geteuid()), '-g', str(os.getgid())], shell=False, stdout=PIPE,
                preexec_fn=os.setsid)
        working = True
        while working:
            time.sleep(0.5)
            self.process.poll()
            rc = self.process.returncode
            if rc is None:
                working = True
            else:
                self.process = None
                working = False
        return rc

    def backup_go(self):
        self.wip_unsensitive()
        self.progress.setEnabled()
        self.progress.setLabel("Backup")
        dest = self.backup_img_name
        if os.path.exists(dest):
            info = Info(_("Backup confirmation"), True, _("Do you want to overwrite the file?"))
            if not (self.ask_YesOrNo(info)):
                self.returncode = 1
                return False
        st = os.statvfs(os.path.dirname(dest))
        free = st.f_bavail * st.f_frsize
        if free < self.deviceSize:
            sizeM = str(self.deviceSize / (1024 * 1024))
            message = _("The destination directory is too small to receive the backup (%s Mb needed)") % (sizeM)
            self.logger(message)
            logging.warning(message)
            self.emergency(message)
            self.initial_state()
            return False
        else:
            self.operation = True
            self.returncode = 0
            source = self.dev.split('(')[1].split(')')[0]
            message = _('Backup to: {}').format(dest)
            self.logger(message)
            logging.info(message)
            # Writing step
            self.iface.do_write(source, dest, self.deviceSize)
            while not self.iface.done:
                progress = self.iface.progress
                self.progress.setValue(progress)
                self.dialog.pollEvent()
                time.sleep(.2)
            success, message = self.iface.end()
            if success:
                #: don't translate source or target
                message = _('{source} successfully written to {target}').format(source=source.split('/')[-1], target=dest)
                self.logger(message)
                logging.info(message)
                self.progress.setEnabled()
                self.progress.setValue(100)
                self.dialog.pollEvent()
                self.logger(message)
                logging.info(message)
                self.success()
                self.initial_state()
            else:
                self.emergency(message)
                self.initial_state()
                return False
        return True

    def do_write(self):
        self.wip_unsensitive()
        self.progress.setEnabled()
        self.progress.setLabel("Writing")
        source = self.img_name
        target = self.dev.split('(')[1].split(')')[0]
        b = os.path.getsize(source)
        if b > (self.deviceSize):
            message = _('The device is too small to contain the ISO file.')
            self.logger(message)
            logging.error(message)
            self.emergency(message)
        else:
            info = Info(_("Writing confirmation"), True, self.warning)
            if self.ask_YesOrNo(info):
                if self.deviceSize > 1024 * 1024 * 1024 * 32:
                    info = Info(_("Warning"), True,
                                _('The device is bigger than 32 Gbytes. Are you sure you want use it?'))
                    if self.ask_YesOrNo(info):
                        pass
                    else:
                        return
                #: don't translate source or target
                self.progress.setLabel(_('Writing {source} to {target}').format(source=source.split('/')[-1],
                                                                                target=target.split('/')[-1]))
                message = _('Executing copy from {source} to {target}').format(source=source, target=target)
                self.operation = True
                self.logger(message)
                logging.info(message)
                success, message = self.u.do_unmount(target)
                self.udev_wait(_("unmounting"))
                if success:
                    # Writing step
                    self.iface.do_write(source, target, b)
                    progress = self.iface.progress
                    while not self.iface.done:
                        progress = self.iface.progress
                        self.progress.setValue(progress)
                        self.dialog.pollEvent()
                        time.sleep(.5)
                    success, message = self.iface.end()
                    if success:
                        #: don't translate source or target
                        message = _('Image {source} written to {target}').format(source=source.split('/')[-1],
                                                                                        target=target)
                        message += "\n" + _('Bytes written: {}').format(str(b))
                        self.logger(message)
                        logging.info(message)
                        self.progress.setLabel(_('Checking ') + target.split('/')[-1])
                        self.progress.setValue(0)
                        self.dialog.pollEvent()
                        # Checking
                        self.iface.check_write(target, source)
                        progress = 0
                        while progress < 100:
                            self.progress.setValue(progress)
                            self.dialog.pollEvent()
                            time.sleep(.5)
                            progress = self.iface.progress
                        nowarning, message = self.iface.end()
                        self.progress.setEnabled()
                        self.logger(message)
                        logging.info(message)
                        # Add persistent partition if asked
                        if self.partition_cbox.isChecked() and self.partition_cb.value() == "ext4":
                            self.progress.setLabel(_("Adding persistent partition"))
                            self.progress.setValue(0)
                            if self.cryptcb.isChecked():
                                if self.cryptkey.value() == "":
                                    message =  _("No key for encrypted partition provided. Adding the partition aborted.")
                                    self.logger(message)
                                    logging.warning(message)
                                else:
                                    self.iface.do_persistence(target, self.partition_label.value(), self.cryptkey.value())
                                    while not self.iface.done:
                                        progress = self.iface.progress
                                        self.progress.setValue(progress)
                                        self.progress.setLabel(self.iface.message)
                                        self.dialog.pollEvent()
                                        time.sleep(.5)
                                    if self.iface.state:
                                        message = _("Added encrypted persistent partition")
                                        self.logger(message)
                                        logging.warning(message)
                                    else:
                                        self.logger(_("Adding encrypted persistent partition failed"))
                                        self.logger(self.iface.message)
                                        nowarning = False
                            else:
                                self.iface.do_persistence(target, self.partition_label.value(), "")
                                while not self.iface.done:
                                    progress = self.iface.progress
                                    self.progress.setValue(progress)
                                    self.dialog.pollEvent()
                                    time.sleep(.5)
                                if self.iface.state:
                                    message = _("Added persistent partition")
                                else:
                                    message = _("Adding persistent partition failed")
                                    self.logger(self.iface.message)
                                    nowarning = False
                                self.logger(message)
                                logging.warning(message)
                        # Unmount if partitions are automatically mounted and then eject
                        self.progress.setValue(100)
                        self.dialog.pollEvent()
                        success, message = self.u.do_unmount(target)
                        self.udev_wait(_("unmounting"))
                        if success:
                            self.u.eject(target)
                            if nowarning :
                                self.success()
                            else:
                                self.warn()
                        else:
                            self.emergency(message)
                        self.initial_state()
                    else:
                        self.emergency(message)
                        self.initial_state()
                else:
                    self.emergency(message)
                    self.initial_state()
            else:
                self.initial_state()
            self.operation = False

    def success(self):
        self.operation = False
        self.final_unsensitive()
        info = Info(_("Success"), True, _("The operation completed successfully.") + "\n"\
 + _("You are free to unplug it now, a logfile \n\
/home/-user-/.isodumper/isodumper.log has been saved.")+ "\n"\
    + _("You may also consult /var/log/magiback.log"))
        if self.ask_OK(info):
            return

    def warn(self):
        self.operation = False
        self.final_unsensitive()
        info = Info(_("Warning"), True, _("The operation completed, but with anomalies.\n\
 Check carefully the messages in log view") + "\n"\
+ _("You are free to unplug it now, a logfile \n\
/home/-user-/.isodumper/isodumper.log has been saved.") + "\n"\
    + _("You may also consult /var/log/magiback.log"))
        if self.ask_OK(info):
            return

    def confirm_close(self, *args):
        if not self.operation:  # no writing , backup nor format running
            self.close()
        else:  # writing , backup or format running
            info = Info(_("Warning"), True, _("Writing is in progress. Exiting during writing \n\
            will make the device or the backup unusable.\n\
            Are you sure you want to quit during writing?"))
            if self.ask_YesOrNo(info):
                return True
            else:
                return False

    def emergency(self, message):
        self.operation = False
        self.returncode = 1
        self.final_unsensitive()
        info = Info(_("Error"), True, message)
        self.ask_OK(info)

    def final_unsensitive(self):
        self.ima.setDisabled()
        self.devicelist.setDisabled()
        self.write_cbox.setDisabled()
        self.backup_cbox.setDisabled()
        self.progress.setDisabled()
        self.backup_select.setDisabled()
        self.partition_cbox.setDisabled()

    def wip_unsensitive(self):
        self.ima.setDisabled()
        self.devicelist.setDisabled()
        self.backup_cbox.setDisabled()
        self.backup_select.setDisabled()
        self.write_cbox.setDisabled()
        self.refreshbt.setDisabled()
        self.partition_cbox.setDisabled()
        self.partition_cb.setDisabled()
        self.partition_label.setDisabled()
        self.cryptcb.setDisabled()
        self.cryptkey.setDisabled()
        self.start_bt.setDisabled()

    def close(self):
        # to exit from _handleEvents loop
        self._running = False

    def logger(self, text):
        self.logview.appendLines(text + "\n")

    def activate_devicelist(self):
        self.devicelist.setEnabled()
        message = _('ISO Image to copy: ') + self.img_name
        self.logger(message)
        logging.warning(message)

    #        self.chooser.set_tooltip_text(self.img_name)

    def help_dialog(self):
        info = Info(_("IsoDumper"), True, _("Mageia IsoDumper") + "<BR />\
----------------<BR />" +
                    _("This GUI program is primarily for safely writing a bootable ISO image to a USB flash drive, \
an operation devious & potentially hazardous when done by hand. As a bonus, it can also back up the \
entire previous contents of the flash drive onto the hard disc, and restore the flash drive \
to its previous state subsequently.") + "<BR />" +
                    _("It gives also a feature for formatting the USB device.") + "<BR /><BR />" +
                    _(
                        "IsoDumper can be launched either from the menus, or a user console with the command 'isodumper'.") + "<BR />" +
                    _(
                        "The root password is solicited when this is necessary for the program's operation.") + " <BR />" +
                    _("The flash drive can be inserted beforehand or once the program is started. In the latter case, a \
dialogue will say that there is no flash drive inserted, and allow a 'retry' to find it once it is. <BR />\
(You may have to close any automatically opened File Manager window).") + "<BR /><BR />" +
                    _("The fields of the main window are as follows:<BR />\
- Device to work on: the device of the USB flash drive, a drop-down list to choose from.<BR />\
- Write Image: to choose the source ISO image *.iso (or flash drive backup file *.img) to write out.<BR />\
- Write to device: This button launches the operation - with a prior warning dialogue.") + "<BR />" +
                    _(
                        "- Add a persistent partition: the remaining space will be used in a new partition where data from the Live system can be written and recovered between sessions.") + "<BR />" +
                    _(
                        "- Encrypt: the persistent partition will be encrypted with the key provided in <i>Key</i> field.") + "<BR />" +
                    _("The operation is shown in the progress bar beneath.") + "<BR />" +
                    _("- Backup to: define the name and placement of the backup image file. The current flash drive \
will be backed up to a disc file. Note that the entire flash drive is preserved, regardless of its \
actual contents; ensure that you have the necessary free disc space (the same size as the USB device). \
This backup file can be used later to restore the flash drive by selecting it as the source *.img file to write out.") + "<BR />" +
                    _("- Backup the device: launch the backup operation.") + "<BR />" +
                    _("- Format the device: create an unique partition on the entire volume in the specified format in FAT, \
exFAT, NTFS or ext. You can specify a volume name and the format in a new dialog box.") + "<BR />")
        if self.ask_OK(info):
            return

    def __init__(self, debug=False):
        #: placeholder for release number
        APP = "isodumper"
        DIR = "/usr/share/locale"
        # Call translation catalog
        gettext.install(APP, localedir=DIR, names=('ngettext',))

        # Check that there is no other instance running
        current_pid = psutil.Process().pid
        proc_iter = psutil.process_iter(attrs=["pid", "name"])
        for p in proc_iter:
            if (p.info["name"] == APP) and (p.info["pid"] != current_pid):
                info = Info(_("Error"), True, _("There is another instance of Isodumper already running."))
                self.ask_OK(info)
                yui.YUILoader.deleteUI()
                self._running = False
                return

        # TODO Read log level from command line
        level = logging.DEBUG if debug else logging.ERROR
        logpath = os.path.join(os.path.expanduser('~'), '.isodumper')
        if not (os.path.isdir(logpath)):
            os.mkdir(logpath)
        logging.basicConfig(filename=os.path.join(logpath,"isodumper.log"),
                            format='%(asctime)s %(levelname)-8s %(message)s',
                            level=level)

        # define size of the selected device
        self.deviceSize = 0

        # Operation running
        self.operation = False

        # Prepare interface on DBus
        self.bus = SystemBus()
        self.iface = self.bus.get("org.mageia.Magiback", "Isodumper")

        self.ChooseImage = _("Choose an image")
        self.warning = _("Warning\nThis will destroy all data on the target device,\n\
        are you sure you want to proceed?\n\
        If you say ok here, please <b>do not unplug</b>\
        the device during the following operation.")
        """
        Init/Constructor for the 'widgets'
        """
        self.dialog = basedialog.BaseDialog.__init__(self, _("Isodumper {}").format(version.RELEASE), "", basedialog.DialogType.POPUP, 100, 20)
        yui.YUI.app().setApplicationIcon("/usr/share/icons/isodumper.png")

    def UIlayout(self, layout):
        # create the main gui
        # +---------------------+
        # +   banner            +
        # +---------------------+
        # |  devicebox          |
        # +---+-----+------+----+
        # + L | ima | writebt |
        # +---+-----+------+----+
        # + L | backup_select | backupbt |
        # +---+-----+------+----+
        # + F       | formatbt  |
        # +----------------+----+
        # | progress            |
        # +---------------------+
        # | report              |
        # +---------------------+
        # | refreshbt | aboutbt  | helpbt | quitbt  |
        # +---------------------+
        #self.ancrage = self.factory.createReplacePoint(self.dialog)
        self.box = self.factory.createVBox(layout)
        self.bannerbox = self.factory.createHBox(self.box)
        self.banner = self.factory.createImage(self.bannerbox, "/usr/share/isodumper/header.svg")
        self.devicebox = self.factory.createHBox(self.box)
        self.devicelist = self.factory.createComboBox(self.devicebox, _("Select the device to work on:"), False)
        self.devicelist.setNotify()
        self.devicelist.setStretchable(0, True)
        self.refreshbt = self.factory.createPushButton(self.devicebox, _("Update list"))
        self.refreshbt.setStretchable(0, True)
        self.operation_frame = self.factory.createFrame(self.box, _("Select operations"))
        self.operationbox = self.factory.createVBox(self.operation_frame)
        self.labelbox = self.factory.createHBox(self.operationbox)
        self.labelbox.setStretchable(0, True)
        self.factory.createLabel(self.labelbox, "The selected operations will be executed in order from top to bottom.\nIf both write image and create partition are selected, the partition\nwill be created in the free space after the image.").setStretchable(0, True)
        self.backupbox = self.factory.createHBox(self.operationbox)
        self.backup_cbox = self.factory.createCheckBox(self.backupbox, _("Backup the device to:"))
        self.backup_cbox.setNotify()
        #   add file picker for backup file name
        self.backup_select = self.factory.createPushButton(self.backupbox, self.ChooseImage)
        self.backup_select.setStretchable(0, True)
        self.factory.createHStretch(self.backupbox)
        self.writebox = self.factory.createHBox(self.operationbox)
        self.write_cbox = self.factory.createCheckBox(self.writebox, _("Write Image from:"))
        self.write_cbox.setNotify()
        #   add file picker for image file
        self.ima = self.factory.createPushButton(self.writebox, self.ChooseImage)
        self.ima.setStretchable(0, True)
        self.factory.createHStretch(self.writebox)
        #self.writebt = self.factory.createPushButton(self.writebox, _("&Write to device"))
        self.partitionbox = self.factory.createHBox(self.operationbox)
        self.partition_cbox = self.factory.createCheckBox(self.partitionbox, _("Create partition of type:"))
        self.partition_cbox.setNotify()
        self.partition_cb = self.factory.createComboBox(self.partitionbox, _("Type:"))
        self.partition_cb.addItem("", True)
        self.format_type = {'fat32': _("FAT32"),
                            'ext4': _("ext4"),
                            'ntfs': _("NTFS"),
                            'exfat': _("exFAT"),
                            'persist': _("Persistent partition"),
                            }
        for key in self.format_type:
            self.partition_cb.addItem(self.format_type[key], False)
        self.partition_cb.setNotify()
        self.partition_label = self.factory.createInputField(self.partitionbox, _("Label:"))
        self.partition_label.setStretchable(0, True)
        self.persistencebox = self.factory.createHBox(self.operationbox)
        #self.persistencecb = self.factory.createCheckBox(self.persistencecol1,
        #                                                _("Add a persistent partition in the remaining space"))
        self.cryptcb = self.factory.createCheckBox(self.persistencebox, _("Encrypt partition using LUKS, with key:"))
        self.cryptcb.setNotify()
        self.cryptkey = self.factory.createInputField(self.persistencebox, _("Key:"), passwordMode=True)
        self.cryptkey.setStretchable(0, True)
        #self.formatbt = self.factory.createPushButton(self.formatbox, _("Format the device"))
        self.execute_frame = self.factory.createFrame(self.box, _("Execution"))
        self.execute_framevb = self.factory.createVBox(self.execute_frame)
        self.execute_label = self.factory.createLabel(self.execute_framevb, _("When you are sure all options are correct, start:"))
        self.start_bt = self.factory.createPushButton(self.execute_framevb, _("Execute"))
        self.start_bt.setNotify()
        self.progressbox = self.factory.createHBox(self.execute_framevb)
        self.progress = self.factory.createProgressBar(self.progressbox, _("Progress"), 100)
        self.progress.setStretchable(0, True)
        self.reportbox = self.factory.createHBox(self.box)
        self.reportbox.setWeight(1, 30)
        self.logview = self.factory.createLogView(self.reportbox, _("Report"), 10)
        self.logview.setStretchable(0, True)
        self.buttonsbox = self.factory.createHBox(self.box)
        self.aboutbt = self.factory.createPushButton(self.buttonsbox, _("About"))
        self.aboutbt.setStretchable(0, True)
        self.helpbt = self.factory.createPushButton(self.buttonsbox, _("Help"))
        self.helpbt.setStretchable(0, True)
        self.quitbt = self.factory.createPushButton(self.buttonsbox, _("Quit"))
        self.quitbt.setStretchable(0, True)
        # Connect events
        self.eventManager.addWidgetEvent(self.quitbt, self.confirm_close)
        self.eventManager.addWidgetEvent(self.ima, self.ask_image)
        #self.eventManager.addWidgetEvent(self.writebt, self.do_write)
        self.eventManager.addWidgetEvent(self.cryptcb, self.check_encryt)
        #self.eventManager.addWidgetEvent(self.backupbt, self.backup_go)
        self.eventManager.addWidgetEvent(self.backup_select, self.backup_choosed)
        #self.eventManager.addWidgetEvent(self.formatbt, self.do_format)
        self.eventManager.addWidgetEvent(self.backup_cbox, self.select_backup)
        self.eventManager.addWidgetEvent(self.write_cbox, self.select_write)
        self.eventManager.addWidgetEvent(self.partition_cbox, self.select_partition)
        self.eventManager.addWidgetEvent(self.partition_cb, self.select_partition_type)
        self.eventManager.addWidgetEvent(self.devicelist, self.device_selected)
        self.eventManager.addWidgetEvent(self.start_bt, self.start)
        self.eventManager.addWidgetEvent(self.refreshbt, self.update_list)
        self.eventManager.addWidgetEvent(self.helpbt, self.help_dialog)
        self.eventManager.addWidgetEvent(self.aboutbt, self.aboutDialog)
        self.u = None
        try:
            self.u = UDisks2()
        except:
            message = _('UDisks2 is not available on your system')
            logging.error(message)
            self.emergency(message)
        if not self.get_devices():
            self.dialog.destroy()
            yui.YUILoader.deleteUI()
            self._running = False
            return
        # Set the initial state, active, disabled
        self.initial_state()
        self.dialog.recalcLayout()

        self.uEventQueue = SimpleQueue()
        if yui.YUI.app().isTextMode():
            self.glib_loop = GLib.MainLoop()
            self.glib_thread = threading.Thread(target=self.glib_mainloop, args=(self.glib_loop,))
            self.glib_thread.start()

        self.u.iface["org.freedesktop.DBus.ObjectManager"].InterfacesAdded.connect(self.device_changed)
        self.u.iface["org.freedesktop.DBus.ObjectManager"].InterfacesRemoved.connect(self.device_changed)

    def glib_mainloop(self, loop):
        '''
        thread function for glib main loop
        '''
        loop.run()


    def device_changed(self, a, b):
        logging.debug(f"Signal {a}")
        if not self.operation:
            if 'drives' in a.split('/'):
                logging.debug('device-changed')
                self.uEventQueue.put({'event': "device-changed", 'value': True})

    def ask_image(self):
        self.img_name = yui.YUI.app().askForExistingFile("", "*.iso *.img", self.ChooseImage)
        if self.img_name != "":
            # Check if the image has a signed checksum
            self.get_sum(self.img_name)
            if self.signature_found:
                if not self.signature_checked:
                    info = Info(_("Warning"), True,
                                 _("The validation of the GPG signature of the checksum file failed !") + "\n" + _("Do you want to continue?"))
                    if self.ask_YesOrNo(info):
                        pass
                    else:
                        self.img_name = ""
                        return
                else:
                    self.logger(_("The checksum file is signed"))
            else:
                info = Info(_("Warning"), True,
                            _('No GPG signature has been found or the key is expired. Are you sure you want to use this image?'))
                if self.ask_YesOrNo(info):
                    pass
                else:
                    self.img_name = ""
                    return
            self.ima.setLabel(os.path.basename(self.img_name))
            self.dialog.recalcLayout()
            self.activate_devicelist()
            self.image_is_selected = True
        else:
            self.image_is_selected = False
        self.interface_active_state()

    def interface_active_state(self):
        #   Determine the state of the Execute button and others, if they can be active or not
        if self.devicelist.selectedItem() is not None:
            self.partition_cbox.setEnabled()
            self.backup_cbox.setEnabled()
            self.write_cbox.setEnabled()
        else:
            self.partition_cbox.setDisabled()
            self.partition_cbox.setChecked(False)
            self.backup_cbox.setDisabled()
            self.backup_cbox.setChecked(False)
            self.write_cbox.setDisabled()
            self.write_cbox.setChecked(False)
            self.cryptcb.setChecked(False)

        backup_ready = self.backup_cbox.isChecked() and (self.backup_dest != "")
        write_ready = self.write_cbox.isChecked() and (self.img_name != "")
        partition_ready = self.partition_cbox.isChecked() and (self.partition_cb.value() in self.format_type.values())
        crypt_ready = self.cryptcb.isChecked() and (self.cryptkey.value() != "")
        start_active = backup_ready or write_ready or partition_ready
        if start_active:
            self.start_bt.setEnabled()
        else:
            self.start_bt.setDisabled()
        if partition_ready:
            self.cryptcb.setEnabled()
        else:
            self.cryptcb.setDisabled()
            self.cryptkey.setDisabled()


    def select_backup(self):
        if self.backup_cbox.isChecked():
            self.backup_select.setEnabled()
        else:
            self.backup_select.setDisabled()
        self.interface_active_state()

    def select_write(self):
        if self.write_cbox.isChecked():
            self.ima.setEnabled()
        else:
            self.ima.setDisabled()
        self.interface_active_state()

    def select_partition(self):
        if self.partition_cbox.isChecked():
            self.partition_cb.setEnabled()
            self.partition_label.setEnabled()
        else:
            self.partition_cb.setDisabled()
            self.partition_label.setDisabled()
        self.interface_active_state()

    def select_partition_type(self):
        if self.partition_cb.value() in ("ext4" ,"Persistent partition"):
            self.cryptcb.setEnabled()
            if self.partition_cb.value() == "Persistent partition":
                self.partition_label.setValue("mgalive-persist")
                self.partition_cb.setValue('ext4')
        else:
            self.cryptcb.setDisabled()
            self.cryptcb.setDisabled()
            self.cryptkey.setDisabled()
        self.interface_active_state()


    def check_encryt(self):
        if self.cryptcb.isChecked():
            self.cryptkey.setEnabled()
        else:
            self.cryptkey.setDisabled()
        self.interface_active_state()

    def start(self):
        if self.backup_cbox.isChecked():
            # check that a name is set
            if self.backup_is_selected:
                if self.backup_go():
                    self.backup_is_selected = False
                else:
                    #  something went wrong, we stop
                    return
            else:
                info = Info(_("Error"), True, _("No image for backup is selected."))
                self.ask_OK(info)
                return
        if self.write_cbox.isChecked():
            if self.image_is_selected:
                self.do_write()
                self.image_is_selected = False
            else:
                info = Info(_("Error"), True, _("No image to write is selected."))
                self.ask_OK(info)
            return
        if self.partition_cbox.isChecked():
            # Create a partition without writing image, will use all the device space.
            self.do_format()


    def ask_format(self):
        atelier = yui.YUI.widgetFactory()
        dialog = atelier.createPopupDialog()
        vb = atelier.createVBox(dialog)
        label = atelier.createInputField(vb, _("Label for the device:"))
        cr = atelier.createRadioButtonGroup(vb)
        vb_c = atelier.createVBox(cr)
        vb_c1 = atelier.createHBox(vb_c)
        format_fat = atelier.createRadioButton(atelier.createLeft(vb_c1), _("FAT32 (Windows)"))
        vb_c4 = atelier.createHBox(vb_c)
        format_exfat = atelier.createRadioButton(atelier.createLeft(vb_c4), _("exFAT (Windows)"))
        vb_c2 = atelier.createHBox(vb_c)
        format_ntfs = atelier.createRadioButton(atelier.createLeft(vb_c2), _("NTFS (Windows)"))
        vb_c3 = atelier.createHBox(vb_c)
        format_ext = atelier.createRadioButton(atelier.createLeft(vb_c3), _("ext4 (Linux)"))
        bb = atelier.createHBox(vb)
        executebt = atelier.createPushButton(bb, _("Execute"))
        cancelbt = atelier.createPushButton(bb, _("Cancel"))
        dialog.open()
        returncode = True
        while True:
            event = dialog.waitForEvent()
            if event.eventType() == yui.YEvent.CancelEvent:
                returncode = False
                break
            if event.widget() == executebt:
                if format_fat.value():
                    format_type = 'fat32'
                    format_label = label.value().upper()[:11]
                    break
                if format_exfat.value():
                    format_type = 'exfat'
                    format_label = label.value()[:32]
                    break
                if format_ntfs.value():
                    format_type = 'ntfs'
                    format_label = label.value()[:32]
                    break
                if format_ext.value():
                    format_type = 'ext4'
                    format_label = label.value()
                    break
            if event.widget() == cancelbt:
                returncode = False
                break
        dialog.destroy()
        if returncode:
            return True, format_type, format_label
        else:
            return False, " ", " "

    def ask_OK(self, info):
        yui.YUI.widgetFactory
        mgafactory = yui.YMGAWidgetFactory.getYMGAWidgetFactory(yui.YExternalWidgets.externalWidgetFactory("mga"))
        dlg = mgafactory.createDialogBox(yui.YMGAMessageBox.B_ONE)
        dlg.setTitle(info.title)
        dlg.setText(info.text, info.richtext)
        dlg.setButtonLabel(_("OK"), yui.YMGAMessageBox.B_ONE)
        dlg.setMinSize(60, 10)
        return dlg.show() == yui.YMGAMessageBox.B_ONE

    def ask_YesOrNo(self, info):
        yui.YUI.widgetFactory
        mgafactory = yui.YMGAWidgetFactory.getYMGAWidgetFactory(yui.YExternalWidgets.externalWidgetFactory("mga"))
        dlg = mgafactory.createDialogBox(yui.YMGAMessageBox.B_TWO)
        dlg.setTitle(info.title)
        dlg.setText(info.text, info.richtext)
        dlg.setButtonLabel(_("Yes"), yui.YMGAMessageBox.B_ONE)
        dlg.setButtonLabel(_("No"), yui.YMGAMessageBox.B_TWO)
        dlg.setMinSize(60, 8)
        return dlg.show() == yui.YMGAMessageBox.B_ONE

    def aboutDialog(self):
        yui.YUI.widgetFactory
        mgafactory = yui.YMGAWidgetFactory.getYMGAWidgetFactory(yui.YExternalWidgets.externalWidgetFactory("mga"))
        dlg = mgafactory.createAboutDialog("Isodumper", version.RELEASE, "GPLv2",
                                           _("Oliver Grawert<BR />Papoteur<BR />Pictures : Timothée Giet"), _(
                "A tool for writing ISO images to  a device") + "<BR />http://gitweb.mageia.org/software/isodumper", "")
        dlg.show()

    def nodevDialog(self):
        yui.YUI.widgetFactory
        mgafactory = yui.YMGAWidgetFactory.getYMGAWidgetFactory(yui.YExternalWidgets.externalWidgetFactory("mga"))
        dlg = mgafactory.createDialogBox(yui.YMGAMessageBox.B_TWO)
        dlg.setTitle("IsoDumper")
        dlg.setText(_(
            "Warning\nNo target devices were found.\nYou need to plug in a USB Key to which the image can be written."))
        dlg.setButtonLabel(_("Refresh"), yui.YMGAMessageBox.B_ONE)
        dlg.setButtonLabel(_("Cancel"), yui.YMGAMessageBox.B_TWO)
        dlg.setMinSize(60, 8)
        return dlg.show() == yui.YMGAMessageBox.B_ONE

    def doSomethingIntoLoop(self):
        self.traitement = None
        #if event.eventType() == yui.YEvent.CancelEvent:
            #self.confirm_close()
            #break
        try:
            item = self.uEventQueue.get_nowait()
            logging.debug(f"Dealing with {item['event']}")
            if item['event'] == "device-changed":
                self.update_list_on_event()
        except Exception as e:
            pass

    def run(self, debug=False):

        self._setupUI()
        # setting to False will break the event loop
        self._running = True
        self.timeout = 100

        try:
            self._handleEvents()
        except Exception:
            import traceback
            traceback.print_exc()
            yui.YDialog.deleteAllDialogs()
        # Closing
        self.dialog.destroy()
        self.dialog = None
        if yui.YUI.app().isTextMode():
            self.glib_loop.quit()
            self.glib_thread.join()


if __name__ == "__main__":
    # Send the yui logging outside of the console
    log = yui.YUILog.setLogFileName("/dev/null")
    parser = ParseCLI('isodumper')
    parser.parser.add_argument('--debug', help=_('allow debug information'), action='store_true')
    if parser.args.version:
        print(version.RELEASE)
    else:
        if parser.args.debug:
            app = IsoDumper(debug=True)
        else:
            app = IsoDumper()
        app.run()
        # next line seems to be a workaround to prevent the qt-app from crashing
        # see https://github.com/libyui/libyui-qt/issues/41
        yui.YUILoader.deleteUI()