#!/usr/bin/env python3
# Copyright (c) 2019-2020 by Silvan Calarco <silvan.calarco@mambasoft.it>
# Release under the terms of the GPL version 3 license

from PyQt5 import QtCore
from PyQt5 import QtGui
from PyQt5.QtCore import pyqtProperty
from PyQt5 import QtCore, QtWidgets
from PyQt5 import QtWidgets, uic
from pathlib import Path
import gettext
import subprocess
import os

import gi
gi.require_version('PackageKitGlib', '1.0')
from gi.repository import PackageKitGlib as packagekit

DATADIR = os.path.dirname(os.path.realpath((__file__))) + "/"


class MambabaseWizard(QtWidgets.QWizard):
    def __init__(self, parent=None):
        super(MambabaseWizard, self).__init__(parent)
        self.welcomePage = WelcomePage(self)
        self.addPage(self.welcomePage)
        self.selectGroupsPage = SelectGroupsPage(self)
        self.addPage(self.selectGroupsPage)
        self.selectExtraPage = SelectExtraPage(self)
        self.addPage(self.selectExtraPage)
        self.installationPage = InstallationPage(self)
        self.addPage(self.installationPage)
        self.setWindowTitle(_("openmamba base network installations") +
            " - openmamba.org")
        self.setFixedSize(571,465)
        self.currentIdChanged.connect(self.currentIdChangedSlot)
        self.prepareThread = PrepareThread(self)
        self.installThread = InstallThread(self, self.selectGroupsPage.pkggroups)

    def currentIdChangedSlot(self, currentId):
        if currentId == 0:
            self.prepareThread.start()
        elif currentId == 3:
            self.installThread.start()


class PrepareThread(QtCore.QThread):
    parent = None
    doneSignal = QtCore.pyqtSignal()
    updateProgressSignal = QtCore.pyqtSignal(dict)

    def __init__(self, parent=None):
        super(PrepareThread, self).__init__(parent)
        self.parent = parent
        self.doneSignal.connect(parent.welcomePage.completeChanged)
        self.updateProgressSignal.connect(
            parent.welcomePage.updateProgressSlot)

    def run(self):
        # Update packages list
        self.updateProgressSignal.emit({ 'value': 5,
            'label': _("Checking installed packages...")})
        self.parent.selectGroupsPage.loadPkgGroups()
        self.updateProgressSignal.emit({ 'value': 55,
            'label': _("Checking installed extra components...")})
        self.parent.selectExtraPage.setExtras()
        self.updateProgressSignal.emit({ 'value': 100,
            'label': _("Done. Please, press the Next button to continue.")})
        # Enable back and next buttons
        self.parent.welcomePage.done = True
        self.doneSignal.emit()


class InstallThread(QtCore.QThread):
    parent = None
    doneSignal = QtCore.pyqtSignal()
    updateProgressSignal = QtCore.pyqtSignal(dict)
    pkggroups = {}

    def __init__(self, parent=None, pkggroups={}):
        super(InstallThread, self).__init__(parent)
        self.parent = parent
        self.pkggroups = pkggroups
        self.doneSignal.connect(parent.installationPage.completeChanged)
        self.updateProgressSignal.connect(
            parent.installationPage.updateProgressSlot)

    def run(self):
        install = {}
        install_extras = {}
        parent = self.parent

        # Disable back and next buttons
        parent.installationPage.done = False
        self.doneSignal.emit()
        self.updateProgressSignal.emit(
            { 'value': 1, 'label': _("Starting installation..."),
                'details': _("Starting installation...")})

        # Update packages list
        self.updateProgressSignal.emit({ 'value': 5,
            'label': _("Updating packages list..."),
            'details': _("Updating packages list...")})

        result = subprocess.run(['pkcon', 'refresh'],
            stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        if result.returncode == 0:
            if result.stdout:
                self.updateProgressSignal.emit({
                    'details': result.stdout.decode('UTF-8')})
        else:
            if result.stderr:
                self.updateProgressSignal.emit({
                    'details': result.stderr.decode('UTF-8')})

        # Perform system update
        self.updateProgressSignal.emit({ 'value': 10,
            'label': _("Updating installed packages..."),
            'details': _("Updating installed packages...")})

        result = subprocess.run(['pkcon', 'update', '-y'],
            stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        if result.returncode == 0:
            if result.stdout:
                self.updateProgressSignal.emit({
                    'details': result.stdout.decode('UTF-8')})
        else:
            if result.stderr:
                self.updateProgressSignal.emit({
                    'details': result.stderr.decode('UTF-8')})

        self.updateProgressSignal.emit({ 'value': 20 })

        arch = os.uname()[4]
        if arch == 'i686':
            arch = 'i586'
        elif arch[:3] == 'arm':
            arch = 'arm'
        client = packagekit.Client()

        # Install requested package groups
        for group in parent.selectGroupsPage.groups_checkboxes:
            install[group] = \
                parent.selectGroupsPage.groups_checkboxes[group].isChecked() \
                    and parent.selectGroupsPage.groups_checkboxes[group].isEnabled()

        for inst in install:
            if install[inst]:
                self.updateProgressSignal.emit({
                    'label': _("Installing %s group packages..." % inst),
                    'details': _("Installing %s group packages..." % inst)})
                for pkg in self.pkggroups[inst].split():
                    result =client.resolve(0, (pkg,), None,
                        self.packagekit_progress_cb, None)
                    pkgs = result.get_package_array()
                    for p in pkgs:
                        if 'installed' in p.get_data().split(':'):
                            self.updateProgressSignal.emit({
                                'details': _("Package %s is already installed" % pkg)})
                            break
                        if p.get_arch() != arch:
                            continue
                        packageid = p.get_name() + ';' + p.get_version() + ';' \
                            + p.get_arch() + ';' + p.get_data()
                        self.updateProgressSignal.emit({
                            'details': _("Installing package %s" % pkg)})
                        client.install_packages(False, (packageid, ), None,
                            self.packagekit_progress_cb, p.get_name())

        # Install requested extra packages
        for extra in parent.selectExtraPage.extra_checkboxes:
            install_extras[extra] = \
                parent.selectExtraPage.extra_checkboxes[extra].isChecked() \
                    and parent.selectExtraPage.extra_checkboxes[extra].isEnabled()

        for extra in install_extras:
            if install_extras[extra]:
                self.updateProgressSignal.emit({
                    'label': _("Installing %s extra component..." % extra),
                    'details': _("Installing %s extra component..." % extra)})
                result = subprocess.run(['/usr/bin/openmamba-netsrpms', extra],
                    stdout=subprocess.PIPE, stderr=subprocess.PIPE)
                if result.returncode == 0:
                    if result.stdout:
                        self.updateProgressSignal.emit({
                            'details': result.stdout.decode('UTF-8')})
                else:
                    if result.stderr:
                        self.updateProgressSignal.emit({
                            'details': result.stderr.decode('UTF-8')})


        # Finished
        self.updateProgressSignal.emit({ 'value': 100,
            'label': _("Installation finished!"),
            'details': _("Installation finished!")})

        # Enable back and next buttons
        parent.installationPage.done = True
        self.doneSignal.emit()

    def packagekit_progress_cb(self, status, typ, data=None):
        if status.get_property('package'):
            self.updateProgressSignal.emit({
                'label': _("Installing %s package (%s)..." %
                (status.get_property('package').get_name(),
                str(status.get_percentage())))})


class WelcomePage(QtWidgets.QWizardPage):
    done = False

    def __init__(self, parent=None):
        super(WelcomePage, self).__init__(parent)
        uic.loadUi(DATADIR + "WelcomePage.ui", self)
        self.show()

    def isComplete(self):
        return self.done

    @QtCore.pyqtSlot(dict)
    def updateProgressSlot(self, dict):
        if 'value' in dict:
            self.progressBar.setValue(dict['value'])
        if 'label' in dict:
            self.progressLabel.setText(dict['label'])


class SelectGroupsPage(QtWidgets.QWizardPage):
    groups_checkboxes = {}
    pkggroups = {}

    def __init__(self, parent=None):
        super(SelectGroupsPage, self).__init__(parent)
        uic.loadUi(DATADIR + "SelectGroupsPage.ui", self)
        self.show()

    def loadPkgGroups(self):
        self.groups_checkboxes = {
            'base': self.inst_base,
            'office': self.inst_office,
            'multimedia_players': self.inst_players,
            'multimedia_editing': self.inst_multimedia_editing,
            'internet': self.inst_internet,
            'graphics': self.inst_graphics,
            'games': self.inst_games,
            'virtualization': self.inst_virtualization,
            'server': self.inst_server
        }
        #'devel': self.inst_devel
        # Load packages group db into a dict
        result = subprocess.run([DATADIR + "mambabase-pkggroups-parser.sh"],
            stdout=subprocess.PIPE)
        lines = result.stdout.decode('UTF-8').splitlines()
        for line in lines:
            if line:
                (key, val) = line.split("=")
                self.pkggroups[key] = val

        # Check for groups already installed
        client = packagekit.Client()
        for group in self.groups_checkboxes:
            group_installed = True
            if group in self.pkggroups:
                for pkg in self.pkggroups[group].split():
                    result = client.resolve(0, (pkg,), None,
                        self.packagekit_progress_cb, None)
                    pkgs_found = result.get_package_array()
                    package_installed = False
                    for p in pkgs_found:
                        if 'installed' in p.get_data().split(':'):
                            package_installed = True
                            break
                    if not package_installed and len(pkgs_found) > 0:
                        group_installed = False
                    elif len(pkgs_found) == 0:
                        print(_("WARNING: package %s from group %s not found in repositories"
                            % (pkg, group)))
            if group_installed:
                self.groups_checkboxes[group].setChecked(True)
                self.groups_checkboxes[group].setEnabled(False)

    def packagekit_progress_cb(self, status, typ, data=None):
        pass


class SelectExtraPage(QtWidgets.QWizardPage):
    extra_checkboxes = {}

    def __init__(self, parent=None):
        super(SelectExtraPage, self).__init__(parent)
        uic.loadUi(DATADIR + "SelectExtraPage.ui", self)
        self.setCommitPage(True)
        self.show()

    def setExtras(self):
        self.extra_checkboxes = {
            'nvidia': self.inst_nvidia,
            'fglrx': self.inst_fglrx,
            'fglrx_legacy': self.inst_fglrx_legacy,
            'broadcom_sta': self.inst_broadcom_sta,
            'b43-firmware': self.inst_b43,
            'flashplugin': self.inst_flash,
            'chromium-pepper-flash': self.inst_pepperflash,
            'msttcorefonts': self.inst_msttcf,
            'win32codecs': self.inst_codecs,
            'sun-java': self.inst_java,
            'virtualbox-extension-pack': self.inst_virtualbox,
            'chromium-widevine': self.inst_widevine
        }
#            'skype': self.inst_skype,
#            'spotify': self.inst_spotify,
        for extra in self.extra_checkboxes:
            result = subprocess.run(['/usr/bin/openmamba-netsrpms', '-c', extra],
                stdout=subprocess.PIPE)
            if result.returncode < 2:
                self.extra_checkboxes[extra].setChecked(True)
                self.extra_checkboxes[extra].setEnabled(False)


class InstallationPage(QtWidgets.QWizardPage):
    done = False

    def __init__(self, parent=None):
        super(InstallationPage, self).__init__(parent)
        uic.loadUi(DATADIR + "InstallationPage.ui", self)
        self.setCommitPage(True)
        self.show()

    def isComplete(self):
        if self.done:
            self.installPageTitle.setText(
                _('<html><head/><body><p align="center">' +
                    '<span style="font-size:14pt; font-weight:600;">' +
                    'All done!</span></p></body></html>'))
        return self.done

    @QtCore.pyqtSlot(dict)
    def updateProgressSlot(self, dict):
        if 'value' in dict:
            self.progressBar.setValue(dict['value'])
        if 'label' in dict:
            self.progressLabel.setText(dict['label'])
        if 'details' in dict:
            self.progressDetails.append("<br/>" + dict['details'])


if __name__ == '__main__':
    import sys
    app = QtWidgets.QApplication(sys.argv)
    app.setWindowIcon(QtGui.QIcon(DATADIR + "mambabase.png"))
    gettext.install('mambabase', '/usr/share/locale')
    wizard = MambabaseWizard()
    wizard.show()
    sys.exit(app.exec_())