# Copyright (c) 2015 Ultimaker B.V.
# Cura is released under the terms of the AGPLv3 or higher.
from UM.Application import Application
from UM.Extension import Extension
from UM.Preferences import Preferences
from UM.Logger import Logger
from UM.i18n import i18nCatalog
from cura.Settings.GlobalStack import GlobalStack

from .FirmwareUpdateCheckerJob import FirmwareUpdateCheckerJob
from UM.Settings.ContainerRegistry import ContainerRegistry

i18n_catalog = i18nCatalog("cura")


## This Extension checks for new versions of the firmware based on the latest checked version number.
#  The plugin is currently only usable for applications maintained by Ultimaker. But it should be relatively easy
#  to change it to work for other applications.
class FirmwareUpdateChecker(Extension):
    url = "http://software.ultimaker.com/jedi/releases/latest.version"

    def __init__(self):
        super().__init__()

        # Initialize the Preference called `latest_checked_firmware` that stores the last version
        # checked for the UM3. In the future if we need to check other printers' firmware
        Preferences.getInstance().addPreference("info/latest_checked_firmware", "")

        # Listen to a Signal that indicates a change in the list of printers, just if the user has enabled the
        # 'check for updates' option
        Preferences.getInstance().addPreference("info/automatic_update_check", True)
        if Preferences.getInstance().getValue("info/automatic_update_check"):
            ContainerRegistry.getInstance().containerAdded.connect(self._onContainerAdded)

    def _onContainerAdded(self, container):
        # Only take care when a new GlobaStack was added
        if (isinstance(container, GlobalStack)):
            Logger.log("i", "You have a '%s' in printer list. Let's check the firmware!" % container.getId())
            self.checkFirmwareVersion(container, True)

    ##  Connect with software.ultimaker.com, load latest.version and check version info.
    #   If the version info is different from the current version, spawn a message to
    #   allow the user to download it.
    #
    #   \param silent type(boolean) Suppresses messages other than "new version found" messages.
    #                               This is used when checking for a new firmware version at startup.
    def checkFirmwareVersion(self, container = None, silent = False):
        job = FirmwareUpdateCheckerJob(container = container, silent = silent, url = self.url)
        job.start()