# coding: utf-8
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# Copyright (C) 2016-2018 European Synchrotron Radiation Facility
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__authors__ = ["V. Valls"]
__license__ = "MIT"
__date__ = "16/10/2020"

from .AbstractModel import AbstractModel
from .DetectorModel import DetectorModel
from .CalibrantModel import CalibrantModel
from .DataModel import DataModel
from .MaskedImageModel import MaskedImageModel
from .ImageModel import ImageFromFilenameModel
from .FilenameModel import FilenameModel


class ExperimentSettingsModel(AbstractModel):

    def __init__(self, parent=None):
        super(ExperimentSettingsModel, self).__init__(parent)
        self.__image = ImageFromFilenameModel()
        self.__mask = ImageFromFilenameModel()
        self.__maskedImage = MaskedImageModel(None, self.__image, self.__mask)
        self.__isDetectorMask = True

        self.__wavelength = DataModel()
        self.__polarizationFactor = DataModel()
        self.__calibrantModel = CalibrantModel()
        self.__detectorModel = DetectorModel()
        self.__poniFile = FilenameModel()

        self.__image.changed.connect(self.wasChanged)
        self.__image.filenameChanged.connect(self.wasChanged)
        self.__mask.changed.connect(self.wasChanged)
        self.__mask.filenameChanged.connect(self.wasChanged)
        self.__wavelength.changed.connect(self.wasChanged)
        self.__polarizationFactor.changed.connect(self.wasChanged)
        self.__calibrantModel.changed.connect(self.wasChanged)
        self.__detectorModel.changed.connect(self.wasChanged)
        self.__poniFile.changed.connect(self.wasChanged)

        self.__image.changed.connect(self.__updateDetectorMask)
        self.__detectorModel.changed.connect(self.__updateDetectorMask)
        self.__mask.changed.connect(self.__notAnymoreADetectorMask)

    def __updateDetectorMask(self):
        if self.mask().filename() is not None:
            # It exists a custom mask
            return

        if not self.__isDetectorMask:
            # It was not set by this process
            # Then it was customed by the user
            return

        detector = self.__detectorModel.detector()
        if detector is None:
            mask = None
        else:
            image = self.__image.value()
            if image is not None:
                detector.guess_binning(image)

            mask = detector.mask
            # Here mask can be None
            # For example if image do not feet the detector

        if mask is not None:
            mask = mask.copy()
        self.__mask.changed.disconnect(self.__notAnymoreADetectorMask)
        self.__mask.setValue(mask)
        self.__isDetectorMask = True
        self.__mask.changed.connect(self.__notAnymoreADetectorMask)

    def __notAnymoreADetectorMask(self):
        self.__isDetectorMask = False

    def isValid(self):
        return True

    def calibrantModel(self):
        return self.__calibrantModel

    def detectorModel(self):
        return self.__detectorModel

    def detector(self):
        """Detector getter synchronizing internal detector configuration to
        match the input image.
        """
        detector = self.__detectorModel.detector()
        image = self.__image.value()
        if detector is None:
            return None

        # Do not create another instance of the detector
        # While things are not fixed as expected
        # detector = detector.__class__()

        # TODO: guess_binning should only be called when image or detector have changed

        if image is not None:
            detector.guess_binning(image)

        return detector

    def image(self):
        return self.__image

    def mask(self):
        return self.__mask

    def maskedImage(self):
        return self.__maskedImage

    def wavelength(self):
        return self.__wavelength

    def polarizationFactor(self):
        return self.__polarizationFactor

    def poniFile(self):
        return self.__poniFile