#  Copyright (c) 2021 Ultimaker B.V.
#  Cura is released under the terms of the LGPLv3 or higher.
from typing import Optional

from PyQt5.QtCore import QObject, pyqtProperty, pyqtSignal

from cura.CuraApplication import CuraApplication
from UM.PluginRegistry import PluginRegistry

class Manager(QObject):
    def __init__(self, parent: Optional[QObject] = None):
        super().__init__(parent = parent)
        self._manager: "CuraPackageManager" = CuraApplication.getInstance().getPackageManager()
        self._plugin_registry: PluginRegistry = CuraApplication.getInstance().getPluginRegistry()

        self._manager.installedPackagesChanged.connect(self.checkIfRestartNeeded)
        self._plugin_registry.hasPluginsEnabledOrDisabledChanged.connect(self.checkIfRestartNeeded)

        self._restart_needed = False

    def checkIfRestartNeeded(self):
        if self._manager.hasPackagesToRemoveOrInstall or len(self._plugin_registry.getCurrentSessionActivationChangedPlugins()) > 0:
            self._restart_needed = True
        else:
            self._restart_needed = False
        self.showRestartNotificationChanged.emit()

    showRestartNotificationChanged = pyqtSignal()

    @pyqtProperty(bool, notify = showRestartNotificationChanged)
    def showRestartNotification(self) -> bool:
        return self._restart_needed