#/*##########################################################################
#
# The PyMca X-Ray Fluorescence Toolkit
#
# Copyright (c) 2004-2015 European Synchrotron Radiation Facility
#
# This file is part of the PyMca X-ray Fluorescence Toolkit developed at
# the ESRF by the Software group.
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# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
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# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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__author__ = "V.A. Sole - ESRF Data Analysis"
__contact__ = "sole@esrf.fr"
__license__ = "MIT"
__copyright__ = "European Synchrotron Radiation Facility, Grenoble, France"
try:
    from . import mediantools
except ImportError:
    from PyMca5.PyMcaSciPy.signal import mediantools

from numpy import asarray

def medfilt2d(input_data, kernel_size=None, conditional=0):
    """Median filter for 2-dimensional arrays.

  Description:

    Apply a median filter to the input array using a local window-size
    given by kernel_size (must be odd).

  Inputs:

    in -- An 2 dimensional input array.
    kernel_size -- A scalar or an length-2 list giving the size of the
                   median filter window in each dimension.  Elements of
                   kernel_size should be odd.  If kernel_size is a scalar,
                   then this scalar is used as the size in each dimension.
    conditional -- If different from 0 implements a conditional median filter.

  Outputs: (out,)

    out -- An array the same size as input containing the median filtered
           result.

    """
    image = asarray(input_data)
    if kernel_size is None:
        kernel_size = [3] * 2
    kernel_size = asarray(kernel_size)
    if len(kernel_size.shape) == 0:
        kernel_size = [kernel_size.item()] * 2
    kernel_size = asarray(kernel_size)

    for size in kernel_size:
        if (size % 2) != 1:
            raise ValueError("Each element of kernel_size should be odd.")

    return mediantools._medfilt2d(image, kernel_size, conditional)

def medfilt1d(input_data, kernel_size=None, conditional=0):
    """Median filter 1-dimensional arrays.

  Description:

    Apply a median filter to the input array using a local window-size
    given by kernel_size (must be odd).

  Inputs:

    in -- An 1-dimensional input array.
    kernel_size -- A scalar or an length-2 list giving the size of the
                   median filter window in each dimension.  Elements of
                   kernel_size should be odd.  If kernel_size is a scalar,
                   then this scalar is used as the size in each dimension.
    conditional -- If different from 0 implements a conditional median filter.

  Outputs: (out,)

    out -- An array the same size as input containing the median filtered
           result.

    """
    image = asarray(input_data)
    oldShape = image.shape
    image.shape = -1, 1
    if kernel_size is None:
        kernel_size = [3, 1]
    kernel_size = asarray(kernel_size)
    if len(kernel_size.shape) == 0:
        kernel_size = [kernel_size.item(), 1]
    kernel_size = asarray(kernel_size)

    for size in kernel_size:
        if (size % 2) != 1:
            image.shape = oldShape
            raise ValueError("Kernel_size should be odd.")
    output = mediantools._medfilt2d(image, kernel_size, conditional)
    output.shape = oldShape
    image.shape = oldShape
    return output