# Copyright (c) 2017 Ultimaker B.V.
# Cura is released under the terms of the LGPLv3 or higher.

import collections
import time
#Type hinting.
from typing import Union, List, Dict, TYPE_CHECKING, Optional

from UM.Scene.Iterator.DepthFirstIterator import DepthFirstIterator
from UM.Signal import Signal

from PyQt5.QtCore import QObject, pyqtProperty, pyqtSignal, QTimer
import UM.FlameProfiler
from UM.FlameProfiler import pyqtSlot
from UM import Util

from UM.Application import Application
from UM.Preferences import Preferences
from UM.Logger import Logger
from UM.Message import Message

from UM.Settings.ContainerRegistry import ContainerRegistry
from UM.Settings.InstanceContainer import InstanceContainer
from UM.Settings.SettingFunction import SettingFunction
from UM.Signal import postponeSignals, CompressTechnique

from cura.Machines.MachineTools import getMachineDefinitionIDForQualitySearch

from cura.PrinterOutputDevice import PrinterOutputDevice
from cura.Settings.ExtruderManager import ExtruderManager

from .CuraStackBuilder import CuraStackBuilder

from UM.i18n import i18nCatalog
catalog = i18nCatalog("cura")

if TYPE_CHECKING:
    from cura.Settings.CuraContainerStack import CuraContainerStack
    from cura.Settings.GlobalStack import GlobalStack


class MachineManager(QObject):

    def __init__(self, parent = None):
        super().__init__(parent)

        self._active_container_stack = None     # type: CuraContainerStack
        self._global_container_stack = None     # type: GlobalStack

        self._current_root_material_id = {}
        self._current_root_material_name = {}
        self._current_quality_group = None
        self._current_quality_changes_group = None

        self.machine_extruder_material_update_dict = collections.defaultdict(list)

        self._error_check_timer = QTimer()
        self._error_check_timer.setInterval(250)
        self._error_check_timer.setSingleShot(True)
        self._error_check_timer.timeout.connect(self._updateStacksHaveErrors)

        self._instance_container_timer = QTimer()
        self._instance_container_timer.setInterval(250)
        self._instance_container_timer.setSingleShot(True)
        self._instance_container_timer.timeout.connect(self.__emitChangedSignals)

        self._application = Application.getInstance()
        self._application.globalContainerStackChanged.connect(self._onGlobalContainerChanged)
        self._application.getContainerRegistry().containerLoadComplete.connect(self._onInstanceContainersChanged)

        ##  When the global container is changed, active material probably needs to be updated.
        self.globalContainerChanged.connect(self.activeMaterialChanged)
        self.globalContainerChanged.connect(self.activeVariantChanged)
        self.globalContainerChanged.connect(self.activeQualityChanged)

        self.globalContainerChanged.connect(self.activeQualityChangesGroupChanged)
        self.globalContainerChanged.connect(self.activeQualityGroupChanged)

        self._stacks_have_errors = None  # type:Optional[bool]

        self._empty_definition_changes_container = ContainerRegistry.getInstance().findContainers(id = "empty_definition_changes")[0]
        self._empty_variant_container = ContainerRegistry.getInstance().findContainers(id = "empty_variant")[0]
        self._empty_material_container = ContainerRegistry.getInstance().findContainers(id = "empty_material")[0]
        self._empty_quality_container = ContainerRegistry.getInstance().findContainers(id = "empty_quality")[0]
        self._empty_quality_changes_container = ContainerRegistry.getInstance().findContainers(id = "empty_quality_changes")[0]

        self._onGlobalContainerChanged()

        ExtruderManager.getInstance().activeExtruderChanged.connect(self._onActiveExtruderStackChanged)
        self._onActiveExtruderStackChanged()

        ExtruderManager.getInstance().activeExtruderChanged.connect(self.activeMaterialChanged)
        ExtruderManager.getInstance().activeExtruderChanged.connect(self.activeVariantChanged)
        ExtruderManager.getInstance().activeExtruderChanged.connect(self.activeQualityChanged)

        self.globalContainerChanged.connect(self.activeStackChanged)
        self.globalValueChanged.connect(self.activeStackValueChanged)
        ExtruderManager.getInstance().activeExtruderChanged.connect(self.activeStackChanged)
        self.activeStackChanged.connect(self.activeStackValueChanged)

        Preferences.getInstance().addPreference("cura/active_machine", "")

        self._global_event_keys = set()

        self._printer_output_devices = []
        Application.getInstance().getOutputDeviceManager().outputDevicesChanged.connect(self._onOutputDevicesChanged)
        # There might already be some output devices by the time the signal is connected
        self._onOutputDevicesChanged()

        self._application.callLater(self.setInitialActiveMachine)

        self._material_incompatible_message = Message(catalog.i18nc("@info:status",
                                                "The selected material is incompatible with the selected machine or configuration."),
                                                title = catalog.i18nc("@info:title", "Incompatible Material"))

        containers = ContainerRegistry.getInstance().findInstanceContainers(id = self.activeMaterialId)
        if containers:
            containers[0].nameChanged.connect(self._onMaterialNameChanged)

        # NEW
        self._material_manager = self._application._material_manager
        self._material_manager.materialsUpdated.connect(self._onMaterialsUpdated)

    def _onMaterialsUpdated(self):
        # When the materials lookup table gets updated, it can mean that a material has its name changed, which should
        # be reflected on the GUI. This signal emission makes sure that it happens.
        self.rootMaterialChanged.emit()

    ### NEW
    activeQualityGroupChanged = pyqtSignal()
    activeQualityChangesGroupChanged = pyqtSignal()

    globalContainerChanged = pyqtSignal()  # Emitted whenever the global stack is changed (ie: when changing between printers, changing a global profile, but not when changing a value)
    activeMaterialChanged = pyqtSignal()
    activeVariantChanged = pyqtSignal()
    activeQualityChanged = pyqtSignal()
    activeStackChanged = pyqtSignal()  # Emitted whenever the active stack is changed (ie: when changing between extruders, changing a profile, but not when changing a value)

    globalValueChanged = pyqtSignal()  # Emitted whenever a value inside global container is changed.
    activeStackValueChanged = pyqtSignal()  # Emitted whenever a value inside the active stack is changed.
    activeStackValidationChanged = pyqtSignal()  # Emitted whenever a validation inside active container is changed
    stacksValidationChanged = pyqtSignal()  # Emitted whenever a validation is changed

    blurSettings = pyqtSignal()  # Emitted to force fields in the advanced sidebar to un-focus, so they update properly

    outputDevicesChanged = pyqtSignal()

    rootMaterialChanged = pyqtSignal()

    def setInitialActiveMachine(self):
        active_machine_id = Preferences.getInstance().getValue("cura/active_machine")
        if active_machine_id != "" and ContainerRegistry.getInstance().findContainerStacksMetadata(id = active_machine_id):
            # An active machine was saved, so restore it.
            self.setActiveMachine(active_machine_id)
            # Make sure _active_container_stack is properly initiated
            ExtruderManager.getInstance().setActiveExtruderIndex(0)

    def _onOutputDevicesChanged(self) -> None:
        self._printer_output_devices = []
        for printer_output_device in Application.getInstance().getOutputDeviceManager().getOutputDevices():
            if isinstance(printer_output_device, PrinterOutputDevice):
                self._printer_output_devices.append(printer_output_device)

        self.outputDevicesChanged.emit()

    @pyqtProperty("QVariantList", notify = outputDevicesChanged)
    def printerOutputDevices(self):
        return self._printer_output_devices

    @pyqtProperty(int, constant=True)
    def totalNumberOfSettings(self) -> int:
        return len(ContainerRegistry.getInstance().findDefinitionContainers(id = "fdmprinter")[0].getAllKeys())

    def _onGlobalContainerChanged(self) -> None:
        if self._global_container_stack:
            try:
                self._global_container_stack.nameChanged.disconnect(self._onMachineNameChanged)
            except TypeError:  # pyQtSignal gives a TypeError when disconnecting from something that was already disconnected.
                pass
            try:
                self._global_container_stack.containersChanged.disconnect(self._onInstanceContainersChanged)
            except TypeError:
                pass
            try:
                self._global_container_stack.propertyChanged.disconnect(self._onPropertyChanged)
            except TypeError:
                pass

            for extruder_stack in ExtruderManager.getInstance().getActiveExtruderStacks():
                extruder_stack.propertyChanged.disconnect(self._onPropertyChanged)
                extruder_stack.containersChanged.disconnect(self._onInstanceContainersChanged)

        # Update the local global container stack reference
        self._global_container_stack = Application.getInstance().getGlobalContainerStack()

        self.globalContainerChanged.emit()

        # after switching the global stack we reconnect all the signals and set the variant and material references
        if self._global_container_stack:
            Preferences.getInstance().setValue("cura/active_machine", self._global_container_stack.getId())

            self._global_container_stack.nameChanged.connect(self._onMachineNameChanged)
            self._global_container_stack.containersChanged.connect(self._onInstanceContainersChanged)
            self._global_container_stack.propertyChanged.connect(self._onPropertyChanged)

            # Global stack can have only a variant if it is a buildplate
            global_variant = self._global_container_stack.variant
            if global_variant != self._empty_variant_container:
                if global_variant.getMetaDataEntry("hardware_type") != "buildplate":
                    self._global_container_stack.setVariant(self._empty_variant_container)

            # set the global material to empty as we now use the extruder stack at all times - CURA-4482
            global_material = self._global_container_stack.material
            if global_material != self._empty_material_container:
                self._global_container_stack.setMaterial(self._empty_material_container)

            # Listen for changes on all extruder stacks
            for extruder_stack in ExtruderManager.getInstance().getActiveExtruderStacks():
                extruder_stack.propertyChanged.connect(self._onPropertyChanged)
                extruder_stack.containersChanged.connect(self._onInstanceContainersChanged)

            if self._global_container_stack.getId() in self.machine_extruder_material_update_dict:
                for func in self.machine_extruder_material_update_dict[self._global_container_stack.getId()]:
                    Application.getInstance().callLater(func)
                del self.machine_extruder_material_update_dict[self._global_container_stack.getId()]

        self.activeQualityGroupChanged.emit()
        self._error_check_timer.start()

    ##  Update self._stacks_valid according to _checkStacksForErrors and emit if change.
    def _updateStacksHaveErrors(self) -> None:
        old_stacks_have_errors = self._stacks_have_errors
        self._stacks_have_errors = self._checkStacksHaveErrors()
        if old_stacks_have_errors != self._stacks_have_errors:
            self.stacksValidationChanged.emit()
        Application.getInstance().stacksValidationFinished.emit()

    def _onActiveExtruderStackChanged(self) -> None:
        self.blurSettings.emit()  # Ensure no-one has focus.
        old_active_container_stack = self._active_container_stack

        self._active_container_stack = ExtruderManager.getInstance().getActiveExtruderStack()

        if old_active_container_stack != self._active_container_stack:
            # Many methods and properties related to the active quality actually depend
            # on _active_container_stack. If it changes, then the properties change.
            self.activeQualityChanged.emit()

    def __emitChangedSignals(self) -> None:
        self.activeQualityChanged.emit()
        self.activeVariantChanged.emit()
        self.activeMaterialChanged.emit()

        self.rootMaterialChanged.emit()

        self._error_check_timer.start()

    def _onInstanceContainersChanged(self, container) -> None:
        self._instance_container_timer.start()

    def _onPropertyChanged(self, key: str, property_name: str) -> None:
        if property_name == "value":
            # Notify UI items, such as the "changed" star in profile pull down menu.
            self.activeStackValueChanged.emit()

        elif property_name == "validationState":
            self._error_check_timer.start()

    ## Given a global_stack, make sure that it's all valid by searching for this quality group and applying it again
    def _initMachineState(self, global_stack):
        material_dict = {}
        for position, extruder in global_stack.extruders.items():
            material_dict[position] = extruder.material.getMetaDataEntry("base_file")
        self._current_root_material_id = material_dict
        global_quality = global_stack.quality
        quality_type = global_quality.getMetaDataEntry("quality_type")
        global_quality_changes = global_stack.qualityChanges
        global_quality_changes_name = global_quality_changes.getName()

        if global_quality_changes.getId() != "empty_quality_changes":
            quality_changes_groups = self._application._quality_manager.getQualityChangesGroups(global_stack)
            if global_quality_changes_name in quality_changes_groups:
                new_quality_changes_group = quality_changes_groups[global_quality_changes_name]
                self._setQualityChangesGroup(new_quality_changes_group)
        else:
            quality_groups = self._application._quality_manager.getQualityGroups(global_stack)
            if quality_type not in quality_groups:
                Logger.log("w", "Quality type [%s] not found in available qualities [%s]", quality_type, str(quality_groups.values()))
                return
            new_quality_group = quality_groups[quality_type]
            self._setQualityGroup(new_quality_group)

    @pyqtSlot(str)
    def setActiveMachine(self, stack_id: str) -> None:
        self.blurSettings.emit()  # Ensure no-one has focus.

        container_registry = ContainerRegistry.getInstance()

        containers = container_registry.findContainerStacks(id = stack_id)
        if containers:
            global_stack = containers[0]
            ExtruderManager.getInstance().setActiveExtruderIndex(0)  # Switch to first extruder
            Application.getInstance().setGlobalContainerStack(global_stack)
            self._global_container_stack = global_stack
            Application.getInstance().setGlobalContainerStack(global_stack)
            ExtruderManager.getInstance()._globalContainerStackChanged()
            self._initMachineState(containers[0])
            self.globalContainerChanged.emit()
            self._onGlobalContainerChanged()

        self.__emitChangedSignals()

    @pyqtSlot(str, str)
    def addMachine(self, name: str, definition_id: str) -> None:
        new_stack = CuraStackBuilder.createMachine(name, definition_id)
        if new_stack:
            # Instead of setting the global container stack here, we set the active machine and so the signals are emitted
            self.setActiveMachine(new_stack.getId())
        else:
            Logger.log("w", "Failed creating a new machine!")

    def _checkStacksHaveErrors(self) -> bool:
        time_start = time.time()
        if self._global_container_stack is None: #No active machine.
            return False

        if self._global_container_stack.hasErrors():
            Logger.log("d", "Checking global stack for errors took %0.2f s and we found and error" % (time.time() - time_start))
            return True

        # Not a very pretty solution, but the extruder manager doesn't really know how many extruders there are
        machine_extruder_count = self._global_container_stack.getProperty("machine_extruder_count", "value")
        extruder_stacks = ExtruderManager.getInstance().getMachineExtruders(self._global_container_stack.getId())
        count = 1  # we start with the global stack
        for stack in extruder_stacks:
            md = stack.getMetaData()
            if "position" in md and int(md["position"]) >= machine_extruder_count:
                continue
            count += 1
            if stack.hasErrors():
                Logger.log("d", "Checking %s stacks for errors took %.2f s and we found an error in stack [%s]" % (count, time.time() - time_start, str(stack)))
                return True

        Logger.log("d", "Checking %s stacks for errors took %.2f s" % (count, time.time() - time_start))
        return False

    ##  Check if the global_container has instances in the user container
    @pyqtProperty(bool, notify = activeStackValueChanged)
    def hasUserSettings(self) -> bool:
        if not self._global_container_stack:
            return False

        if self._global_container_stack.getTop().findInstances():
            return True

        stacks = list(ExtruderManager.getInstance().getMachineExtruders(self._global_container_stack.getId()))
        for stack in stacks:
            if stack.getTop().findInstances():
                return True

        return False

    @pyqtProperty(int, notify = activeStackValueChanged)
    def numUserSettings(self) -> int:
        if not self._global_container_stack:
            return 0
        num_user_settings = 0
        num_user_settings += len(self._global_container_stack.getTop().findInstances())
        stacks = list(ExtruderManager.getInstance().getMachineExtruders(self._global_container_stack.getId()))
        for stack in stacks:
            num_user_settings += len(stack.getTop().findInstances())
        return num_user_settings

    ##  Delete a user setting from the global stack and all extruder stacks.
    #   \param key \type{str} the name of the key to delete
    @pyqtSlot(str)
    def clearUserSettingAllCurrentStacks(self, key: str) -> None:
        if not self._global_container_stack:
            return

        send_emits_containers = []

        top_container = self._global_container_stack.getTop()
        top_container.removeInstance(key, postpone_emit=True)
        send_emits_containers.append(top_container)

        linked = not self._global_container_stack.getProperty(key, "settable_per_extruder") or \
                      self._global_container_stack.getProperty(key, "limit_to_extruder") != "-1"

        if not linked:
            stack = ExtruderManager.getInstance().getActiveExtruderStack()
            stacks = [stack]
        else:
            stacks = ExtruderManager.getInstance().getMachineExtruders(self._global_container_stack.getId())

        for stack in stacks:
            if stack is not None:
                container = stack.getTop()
                container.removeInstance(key, postpone_emit=True)
                send_emits_containers.append(container)

        for container in send_emits_containers:
            container.sendPostponedEmits()

    ##  Check if none of the stacks contain error states
    #   Note that the _stacks_have_errors is cached due to performance issues
    #   Calling _checkStack(s)ForErrors on every change is simply too expensive
    @pyqtProperty(bool, notify = stacksValidationChanged)
    def stacksHaveErrors(self) -> bool:
        return bool(self._stacks_have_errors)

    @pyqtProperty(str, notify = globalContainerChanged)
    def activeMachineName(self) -> str:
        if self._global_container_stack:
            return self._global_container_stack.getName()
        return ""

    @pyqtProperty(str, notify = globalContainerChanged)
    def activeMachineId(self) -> str:
        if self._global_container_stack:
            return self._global_container_stack.getId()
        return ""

    @pyqtProperty(QObject, notify = globalContainerChanged)
    def activeMachine(self) -> Optional["GlobalStack"]:
        return self._global_container_stack

    @pyqtProperty(str, notify = activeStackChanged)
    def activeStackId(self) -> str:
        if self._active_container_stack:
            return self._active_container_stack.getId()
        return ""

    @pyqtProperty(QObject, notify = activeStackChanged)
    def activeStack(self) -> Optional["ExtruderStack"]:
        return self._active_container_stack

    @pyqtProperty(str, notify=activeMaterialChanged)
    def activeMaterialId(self) -> str:
        if self._active_container_stack:
            material = self._active_container_stack.material
            if material:
                return material.getId()
        return ""

    ##  Gets a dict with the active materials ids set in all extruder stacks and the global stack
    #   (when there is one extruder, the material is set in the global stack)
    #
    #   \return The material ids in all stacks
    @pyqtProperty("QVariantMap", notify = activeMaterialChanged)
    def allActiveMaterialIds(self) -> Dict[str, str]:
        result = {}

        active_stacks = ExtruderManager.getInstance().getActiveExtruderStacks()
        if active_stacks is not None:  # If we have extruder stacks
            for stack in active_stacks:
                material_container = stack.material
                if not material_container:
                    continue
                result[stack.getId()] = material_container.getId()

        return result

    ##  Gets the layer height of the currently active quality profile.
    #
    #   This is indicated together with the name of the active quality profile.
    #
    #   \return The layer height of the currently active quality profile. If
    #   there is no quality profile, this returns 0.
    @pyqtProperty(float, notify = activeQualityGroupChanged)
    def activeQualityLayerHeight(self) -> float:
        if not self._global_container_stack:
            return 0

        quality_changes = self._global_container_stack.qualityChanges
        if quality_changes:
            value = self._global_container_stack.getRawProperty("layer_height", "value", skip_until_container = quality_changes.getId())
            if isinstance(value, SettingFunction):
                value = value(self._global_container_stack)
            return value
        quality = self._global_container_stack.quality
        if quality:
            value = self._global_container_stack.getRawProperty("layer_height", "value", skip_until_container = quality.getId())
            if isinstance(value, SettingFunction):
                value = value(self._global_container_stack)
            return value

        return 0 # No quality profile.

    @pyqtProperty(str, notify = activeVariantChanged)
    def globalVariantName(self) -> str:
        if self._global_container_stack:
            variant = self._global_container_stack.variant
            if variant and not isinstance(variant, type(self._empty_variant_container)):
                return variant.getName()
        return ""

    @pyqtProperty(str, notify = activeQualityGroupChanged)
    def activeQualityType(self) -> str:
        quality_type = ""
        if self._active_container_stack:
            if self._current_quality_group:
                quality_type = self._current_quality_group.quality_type
        return quality_type

    @pyqtProperty(bool, notify = activeQualityGroupChanged)
    def isActiveQualitySupported(self) -> bool:
        is_supported = False
        if self._global_container_stack:
            if self._current_quality_group:
                is_supported = self._current_quality_group.is_available
        return is_supported

    ##  Returns whether there is anything unsupported in the current set-up.
    #
    #   The current set-up signifies the global stack and all extruder stacks,
    #   so this indicates whether there is any container in any of the container
    #   stacks that is not marked as supported.
    @pyqtProperty(bool, notify = activeQualityChanged)
    def isCurrentSetupSupported(self) -> bool:
        if not self._global_container_stack:
            return False
        for stack in [self._global_container_stack] + list(self._global_container_stack.extruders.values()):
            for container in stack.getContainers():
                if not container:
                    return False
                if not Util.parseBool(container.getMetaDataEntry("supported", True)):
                    return False
        return True

    ## Check if a container is read_only
    @pyqtSlot(str, result = bool)
    def isReadOnly(self, container_id: str) -> bool:
        return ContainerRegistry.getInstance().isReadOnly(container_id)

    ## Copy the value of the setting of the current extruder to all other extruders as well as the global container.
    @pyqtSlot(str)
    def copyValueToExtruders(self, key: str):
        new_value = self._active_container_stack.getProperty(key, "value")
        extruder_stacks = [stack for stack in ExtruderManager.getInstance().getMachineExtruders(self._global_container_stack.getId())]

        # check in which stack the value has to be replaced
        for extruder_stack in extruder_stacks:
            if extruder_stack != self._active_container_stack and extruder_stack.getProperty(key, "value") != new_value:
                extruder_stack.userChanges.setProperty(key, "value", new_value)  # TODO: nested property access, should be improved

    @pyqtProperty(str, notify = activeVariantChanged)
    def activeVariantName(self) -> str:
        if self._active_container_stack:
            variant = self._active_container_stack.variant
            if variant:
                return variant.getName()

        return ""

    @pyqtProperty(str, notify = activeVariantChanged)
    def activeVariantBuildplateName(self) -> str:
        if self._global_container_stack:
            variant = self._global_container_stack.variant
            if variant:
                return variant.getName()

        return ""

    @pyqtProperty(str, notify = globalContainerChanged)
    def activeDefinitionId(self) -> str:
        if self._global_container_stack:
            return self._global_container_stack.definition.id

        return ""

    ##  Get the Definition ID to use to select quality profiles for the currently active machine
    #   \returns DefinitionID (string) if found, empty string otherwise
    @pyqtProperty(str, notify = globalContainerChanged)
    def activeQualityDefinitionId(self) -> str:
        if self._global_container_stack:
            return getMachineDefinitionIDForQualitySearch(self._global_container_stack)
        return ""

    ##  Gets how the active definition calls variants
    #   Caveat: per-definition-variant-title is currently not translated (though the fallback is)
    @pyqtProperty(str, notify = globalContainerChanged)
    def activeDefinitionVariantsName(self) -> str:
        fallback_title = catalog.i18nc("@label", "Nozzle")
        if self._global_container_stack:
            return self._global_container_stack.definition.getMetaDataEntry("variants_name", fallback_title)

        return fallback_title

    @pyqtSlot(str, str)
    def renameMachine(self, machine_id: str, new_name: str):
        container_registry = ContainerRegistry.getInstance()
        machine_stack = container_registry.findContainerStacks(id = machine_id)
        if machine_stack:
            new_name = container_registry.createUniqueName("machine", machine_stack[0].getName(), new_name, machine_stack[0].definition.getName())
            machine_stack[0].setName(new_name)
            self.globalContainerChanged.emit()

    @pyqtSlot(str)
    def removeMachine(self, machine_id: str):
        # If the machine that is being removed is the currently active machine, set another machine as the active machine.
        activate_new_machine = (self._global_container_stack and self._global_container_stack.getId() == machine_id)

        # activate a new machine before removing a machine because this is safer
        if activate_new_machine:
            machine_stacks = ContainerRegistry.getInstance().findContainerStacksMetadata(type = "machine")
            other_machine_stacks = [s for s in machine_stacks if s["id"] != machine_id]
            if other_machine_stacks:
                self.setActiveMachine(other_machine_stacks[0]["id"])

        ExtruderManager.getInstance().removeMachineExtruders(machine_id)
        containers = ContainerRegistry.getInstance().findInstanceContainersMetadata(type = "user", machine = machine_id)
        for container in containers:
            ContainerRegistry.getInstance().removeContainer(container["id"])
        ContainerRegistry.getInstance().removeContainer(machine_id)

    @pyqtProperty(bool, notify = globalContainerChanged)
    def hasMaterials(self) -> bool:
        if self._global_container_stack:
            return Util.parseBool(self._global_container_stack.getMetaDataEntry("has_materials", False))
        return False

    @pyqtProperty(bool, notify = globalContainerChanged)
    def hasVariants(self) -> bool:
        if self._global_container_stack:
            return Util.parseBool(self._global_container_stack.getMetaDataEntry("has_variants", False))
        return False

    @pyqtProperty(bool, notify = globalContainerChanged)
    def hasVariantBuildplates(self) -> bool:
        if self._global_container_stack:
            return Util.parseBool(self._global_container_stack.getMetaDataEntry("has_variant_buildplates", False))
        return False

    ##  The selected buildplate is compatible if it is compatible with all the materials in all the extruders
    @pyqtProperty(bool, notify = activeMaterialChanged)
    def variantBuildplateCompatible(self) -> bool:
        if not self._global_container_stack:
            return True

        buildplate_compatible = True  # It is compatible by default
        extruder_stacks = self._global_container_stack.extruders.values()
        for stack in extruder_stacks:
            material_container = stack.material
            if material_container == self._empty_material_container:
                continue
            if material_container.getMetaDataEntry("buildplate_compatible"):
                buildplate_compatible = buildplate_compatible and material_container.getMetaDataEntry("buildplate_compatible")[self.activeVariantBuildplateName]

        return buildplate_compatible

    ##  The selected buildplate is usable if it is usable for all materials OR it is compatible for one but not compatible
    #   for the other material but the buildplate is still usable
    @pyqtProperty(bool, notify = activeMaterialChanged)
    def variantBuildplateUsable(self) -> bool:
        if not self._global_container_stack:
            return True

        # Here the next formula is being calculated:
        # result = (not (material_left_compatible and material_right_compatible)) and
        #           (material_left_compatible or material_left_usable) and
        #           (material_right_compatible or material_right_usable)
        result = not self.variantBuildplateCompatible
        extruder_stacks = self._global_container_stack.extruders.values()
        for stack in extruder_stacks:
            material_container = stack.material
            if material_container == self._empty_material_container:
                continue
            buildplate_compatible = material_container.getMetaDataEntry("buildplate_compatible")[self.activeVariantBuildplateName] if material_container.getMetaDataEntry("buildplate_compatible") else True
            buildplate_usable = material_container.getMetaDataEntry("buildplate_recommended")[self.activeVariantBuildplateName] if material_container.getMetaDataEntry("buildplate_recommended") else True

            result = result and (buildplate_compatible or buildplate_usable)

        return result

    ##  Property to indicate if a machine has "specialized" material profiles.
    #   Some machines have their own material profiles that "override" the default catch all profiles.
    @pyqtProperty(bool, notify = globalContainerChanged)
    def filterMaterialsByMachine(self) -> bool:
        if self._global_container_stack:
            return Util.parseBool(self._global_container_stack.getMetaDataEntry("has_machine_materials", False))
        return False

    ##  Property to indicate if a machine has "specialized" quality profiles.
    #   Some machines have their own quality profiles that "override" the default catch all profiles.
    @pyqtProperty(bool, notify = globalContainerChanged)
    def filterQualityByMachine(self) -> bool:
        if self._global_container_stack:
            return Util.parseBool(self._global_container_stack.getMetaDataEntry("has_machine_quality", False))
        return False

    ##  Get the Definition ID of a machine (specified by ID)
    #   \param machine_id string machine id to get the definition ID of
    #   \returns DefinitionID (string) if found, None otherwise
    @pyqtSlot(str, result = str)
    def getDefinitionByMachineId(self, machine_id: str) -> str:
        containers = ContainerRegistry.getInstance().findContainerStacks(id = machine_id)
        if containers:
            return containers[0].definition.getId()

    ##  Set the amount of extruders on the active machine (global stack)
    #   \param extruder_count int the number of extruders to set
    def setActiveMachineExtruderCount(self, extruder_count):
        extruder_manager = Application.getInstance().getExtruderManager()

        definition_changes_container = self._global_container_stack.definitionChanges
        if not self._global_container_stack or definition_changes_container == self._empty_definition_changes_container:
            return

        previous_extruder_count = self._global_container_stack.getProperty("machine_extruder_count", "value")
        if extruder_count == previous_extruder_count:
            return

        # reset all extruder number settings whose value is no longer valid
        for setting_instance in self._global_container_stack.userChanges.findInstances():
            setting_key = setting_instance.definition.key
            if not self._global_container_stack.getProperty(setting_key, "type") in ("extruder", "optional_extruder"):
                continue

            old_value = int(self._global_container_stack.userChanges.getProperty(setting_key, "value"))
            if old_value >= extruder_count:
                self._global_container_stack.userChanges.removeInstance(setting_key)
                Logger.log("d", "Reset [%s] because its old value [%s] is no longer valid ", setting_key, old_value)

        # Check to see if any objects are set to print with an extruder that will no longer exist
        root_node = Application.getInstance().getController().getScene().getRoot()
        for node in DepthFirstIterator(root_node):
            if node.getMeshData():
                extruder_nr = node.callDecoration("getActiveExtruderPosition")

                if extruder_nr is not None and int(extruder_nr) > extruder_count - 1:
                    node.callDecoration("setActiveExtruder", extruder_manager.getExtruderStack(extruder_count - 1).getId())

        definition_changes_container.setProperty("machine_extruder_count", "value", extruder_count)

        # Make sure one of the extruder stacks is active
        extruder_manager.setActiveExtruderIndex(0)

        # Move settable_per_extruder values out of the global container
        # After CURA-4482 this should not be the case anymore, but we still want to support older project files.
        global_user_container = self._global_container_stack.getTop()

        # Make sure extruder_stacks exists
        extruder_stacks = []

        if previous_extruder_count == 1:
            extruder_stacks = ExtruderManager.getInstance().getActiveExtruderStacks()
            global_user_container = self._global_container_stack.getTop()

        for setting_instance in global_user_container.findInstances():
            setting_key = setting_instance.definition.key
            settable_per_extruder = self._global_container_stack.getProperty(setting_key, "settable_per_extruder")

            if settable_per_extruder:
                limit_to_extruder = int(self._global_container_stack.getProperty(setting_key, "limit_to_extruder"))
                extruder_stack = extruder_stacks[max(0, limit_to_extruder)]
                extruder_stack.getTop().setProperty(setting_key, "value", global_user_container.getProperty(setting_key, "value"))
                global_user_container.removeInstance(setting_key)

        # Signal that the global stack has changed
        Application.getInstance().globalContainerStackChanged.emit()

    @pyqtSlot(int, result = QObject)
    def getExtruder(self, position: int):
        extruder = None
        if self._global_container_stack:
            extruder = self._global_container_stack.extruders.get(str(position))
        return extruder

    def _onMachineNameChanged(self):
        self.globalContainerChanged.emit()

    def _onMaterialNameChanged(self):
        self.activeMaterialChanged.emit()

    def _onQualityNameChanged(self):
        self.activeQualityChanged.emit()

    def _getContainerChangedSignals(self) -> List[Signal]:
        stacks = ExtruderManager.getInstance().getActiveExtruderStacks()
        stacks.append(self._global_container_stack)
        return [ s.containersChanged for s in stacks ]

    #
    # New
    #

    # We not fetch it from _current_root_material_id, but later we can get it from somewhere else
    @pyqtProperty("QVariantList", notify = rootMaterialChanged)
    def currentExtruderPositions(self):
        return sorted(list(self._current_root_material_id.keys()))

    @pyqtProperty("QVariant", notify = rootMaterialChanged)
    def currentRootMaterialId(self):
        # initial filling the current_root_material_id
        self._current_root_material_id = {}
        for position in self._global_container_stack.extruders:
            self._current_root_material_id[position] = self._global_container_stack.extruders[position].material.getMetaDataEntry("base_file")
        return self._current_root_material_id

    @pyqtProperty("QVariant", notify = rootMaterialChanged)
    def currentRootMaterialName(self):
        # initial filling the current_root_material_name
        if self._global_container_stack:
            self._current_root_material_name = {}
            for position in self._global_container_stack.extruders:
                if position not in self._current_root_material_name:
                    material = self._global_container_stack.extruders[position].material
                    self._current_root_material_name[position] = material.getName()
        return self._current_root_material_name

    ##  Return the variant names in the extruder stack(s).
    ##  For the variant in the global stack, use activeVariantBuildplateName
    @pyqtProperty("QVariant", notify = activeVariantChanged)
    def activeVariantNames(self):
        result = {}

        active_stacks = ExtruderManager.getInstance().getActiveExtruderStacks()
        if active_stacks is not None:
            for stack in active_stacks:
                variant_container = stack.variant
                position = stack.getMetaDataEntry("position")
                if variant_container and variant_container != self._empty_variant_container:
                    result[position] = variant_container.getName()

        return result

    def _setEmptyQuality(self):
        self._current_quality_group = None
        self._current_quality_changes_group = None
        self._global_container_stack.quality = self._empty_quality_container
        self._global_container_stack.qualityChanges = self._empty_quality_changes_container
        for extruder in self._global_container_stack.extruders.values():
            extruder.quality = self._empty_quality_container
            extruder.qualityChanges = self._empty_quality_changes_container

        self.activeQualityGroupChanged.emit()
        self.activeQualityChangesGroupChanged.emit()

    def _setQualityGroup(self, quality_group, empty_quality_changes = True):
        self._current_quality_group = quality_group
        if empty_quality_changes:
            self._current_quality_changes_group = None

        # Set quality and quality_changes for the GlobalStack
        self._global_container_stack.quality = quality_group.node_for_global.getContainer()
        if empty_quality_changes:
            self._global_container_stack.qualityChanges = self._empty_quality_changes_container

        # Set quality and quality_changes for each ExtruderStack
        for position, node in quality_group.nodes_for_extruders.items():
            self._global_container_stack.extruders[position].quality = node.getContainer()
            if empty_quality_changes:
                self._global_container_stack.extruders[position].qualityChanges = self._empty_quality_changes_container

        self.activeQualityGroupChanged.emit()
        self.activeQualityChangesGroupChanged.emit()

    def _setQualityChangesGroup(self, quality_changes_group):
        # TODO: quality_changes groups depend on a quality_type. Here it's fetching the quality_types every time.
        #       Can we do this better, like caching the quality group a quality_changes group depends on?
        quality_type = quality_changes_group.quality_type
        quality_manager = Application.getInstance()._quality_manager
        quality_group_dict = quality_manager.getQualityGroups(self._global_container_stack)
        quality_group = quality_group_dict[quality_type]

        quality_changes_container = self._empty_quality_changes_container
        quality_container = self._empty_quality_changes_container
        if quality_changes_group.node_for_global:
            quality_changes_container = quality_changes_group.node_for_global.getContainer()
        if quality_group.node_for_global:
            quality_container = quality_group.node_for_global.getContainer()

        self._global_container_stack.quality = quality_container
        self._global_container_stack.qualityChanges = quality_changes_container

        for position, extruder in self._global_container_stack.extruders.items():
            quality_changes_node = quality_changes_group.nodes_for_extruders.get(position)
            quality_node = quality_group.nodes_for_extruders.get(position)

            quality_changes_container = self._empty_quality_changes_container
            quality_container = self._empty_quality_changes_container
            if quality_changes_node:
                quality_changes_container = quality_changes_node.getContainer()
            if quality_node:
                quality_container = quality_node.getContainer()

            extruder.quality = quality_container
            extruder.qualityChanges = quality_changes_container

        self._current_quality_group = quality_group
        self._current_quality_changes_group = quality_changes_group
        self.activeQualityGroupChanged.emit()
        self.activeQualityChangesGroupChanged.emit()

    def _setVariantNode(self, position, container_node):
        self._global_container_stack.extruders[position].variant = container_node.getContainer()
        self.activeVariantChanged.emit()

    def _setGlobalVariant(self, container_node):
        self._global_container_stack.variant = container_node.getContainer()

    def _setMaterial(self, position, container_node = None):
        if container_node:
            self._global_container_stack.extruders[position].material = container_node.getContainer()
        else:
            self._global_container_stack.extruders[position].material = self._empty_material_container
        # The _current_root_material_id is used in the MaterialMenu to see which material is selected
        root_material_id = container_node.metadata["base_file"]
        root_material_name = container_node.getContainer().getName()
        if root_material_id != self._current_root_material_id[position]:
            self._current_root_material_id[position] = root_material_id
            self._current_root_material_name[position] = root_material_name
            self.rootMaterialChanged.emit()

    def activeMaterialsCompatible(self):
        # check material - variant compatibility
        if Util.parseBool(self._global_container_stack.getMetaDataEntry("has_materials", False)):
            for position, extruder in self._global_container_stack.extruders.items():
                if not extruder.material.getMetaDataEntry("compatible"):
                    return False
        return True

    ## Update current quality type and machine after setting material
    def _updateQualityWithMaterial(self):
        current_quality = None
        if self._current_quality_group:
            current_quality = self._current_quality_group.quality_type
        quality_manager = Application.getInstance()._quality_manager
        candidate_quality_groups = quality_manager.getQualityGroups(self._global_container_stack)
        available_quality_types = {qt for qt, g in candidate_quality_groups.items() if g.is_available}

        if not self.activeMaterialsCompatible():
            self._setEmptyQuality()
            return

        if not available_quality_types:
            self._setEmptyQuality()
            return

        if current_quality in available_quality_types:
            self._setQualityGroup(candidate_quality_groups[current_quality], empty_quality_changes = False)
            return

        quality_type = sorted(list(available_quality_types))[0]
        preferred_quality_type = self._global_container_stack.getMetaDataEntry("preferred_quality_type")
        if preferred_quality_type in available_quality_types:
            quality_type = preferred_quality_type

        self._setQualityGroup(candidate_quality_groups[quality_type], empty_quality_changes = True)

    def _updateMaterialWithVariant(self, position: Optional[str]):
        if position is None:
            position_list = list(self._global_container_stack.extruders.keys())
        else:
            position_list = [position]

        for position in position_list:
            extruder = self._global_container_stack.extruders[position]

            current_material_base_name = extruder.material.getMetaDataEntry("base_file")
            current_variant_name = extruder.variant.getMetaDataEntry("name")

            material_manager = Application.getInstance()._material_manager
            material_diameter = self._global_container_stack.getProperty("material_diameter", "value")
            candidate_materials = material_manager.getAvailableMaterials(
                self._global_container_stack.definition.getId(),
                current_variant_name,
                material_diameter)

            if not candidate_materials:
                self._setMaterial(position, container_node = None)
                continue

            if current_material_base_name in candidate_materials:
                new_material = candidate_materials[current_material_base_name]
                self._setMaterial(position, new_material)
                continue

        # # Find a fallback material
        # preferred_material_query = self._global_container_stack.getMetaDataEntry("preferred_material")
        # preferred_material_key = preferred_material_query.replace("*", "")
        # if preferred_material_key in candidate_materials:
        #     self._setMaterial(position, candidate_materials[preferred_material_key])
        #     return

    @pyqtSlot("QVariant")
    def setGlobalVariant(self, container_node):
        self.blurSettings.emit()
        with postponeSignals(*self._getContainerChangedSignals(), compress = CompressTechnique.CompressPerParameterValue):
            self._setGlobalVariant(container_node)
            self._updateMaterialWithVariant(None)  # Update all materials
            self._updateQualityWithMaterial()

    @pyqtSlot(str, "QVariant")
    def setMaterial(self, position, container_node):
        position = str(position)
        self.blurSettings.emit()
        with postponeSignals(*self._getContainerChangedSignals(), compress = CompressTechnique.CompressPerParameterValue):
            self._setMaterial(position, container_node)
            self._updateQualityWithMaterial()

    @pyqtSlot(str, "QVariant")
    def setVariantGroup(self, position, container_node):
        position = str(position)
        self.blurSettings.emit()
        with postponeSignals(*self._getContainerChangedSignals(), compress = CompressTechnique.CompressPerParameterValue):
            self._setVariantNode(position, container_node)
            self._updateMaterialWithVariant(position)
            self._updateQualityWithMaterial()

    @pyqtSlot(QObject)
    def setQualityGroup(self, quality_group):
        self.blurSettings.emit()
        with postponeSignals(*self._getContainerChangedSignals(), compress = CompressTechnique.CompressPerParameterValue):
            self._setQualityGroup(quality_group)

        # See if we need to show the Discard or Keep changes screen
        if self.hasUserSettings and Preferences.getInstance().getValue("cura/active_mode") == 1:
            Application.getInstance().discardOrKeepProfileChanges()

    @pyqtProperty(QObject, fset = setQualityGroup, notify = activeQualityGroupChanged)
    def activeQualityGroup(self):
        return self._current_quality_group

    @pyqtSlot(QObject)
    def setQualityChangesGroup(self, quality_changes_group):
        self.blurSettings.emit()
        with postponeSignals(*self._getContainerChangedSignals(), compress = CompressTechnique.CompressPerParameterValue):
            self._setQualityChangesGroup(quality_changes_group)

        # See if we need to show the Discard or Keep changes screen
        if self.hasUserSettings and Preferences.getInstance().getValue("cura/active_mode") == 1:
            Application.getInstance().discardOrKeepProfileChanges()

    @pyqtProperty(QObject, fset = setQualityChangesGroup, notify = activeQualityChangesGroupChanged)
    def activeQualityChangesGroup(self):
        return self._current_quality_changes_group

    @pyqtProperty(str, notify = activeQualityGroupChanged)
    def activeQualityOrQualityChangesName(self):
        name = self._empty_quality_container.getName()
        if self._current_quality_changes_group:
            name = self._current_quality_changes_group.name
        elif self._current_quality_group:
            name = self._current_quality_group.name
        return name