# Author: Massimiliano Galli CERN  05/2019

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# Copyright (C) 1995-2019, Rene Brun and Fons Rademakers.                      #
# All rights reserved.                                                         #
#                                                                              #
# For the licensing terms see $ROOTSYS/LICENSE.                                #
# For the list of contributors see $ROOTSYS/README/CREDITS.                    #
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from . import pythonization
import cppyy

def _rsub(self, other):
    # Parameters:
    # - self: complex number
    # - other: other (in general not complex) number
    return -self+other

def _perform_division(self, other):
    # Parameters:
    # - self: complex number
    # - other: int, float of long (Py2) number
    TComplex = cppyy.gbl.TComplex
    other_complex = TComplex.TComplex(other,0)
    return other_complex/self

def _rdiv(self, other):
    # Parameters:
    # - self: complex number
    # - other: other term
    if isinstance(other, (int, long, float)):
        return _perform_division(self, other)
    else:
        return NotImplemented

def _rtruediv(self, other):
    # Parameters:
    # - self: complex number
    # - other: other term
    if isinstance(other, (int, float)):
        return _perform_division(self, other)
    else:
        return NotImplemented

@pythonization('TComplex')
def pythonize_tcomplex(klass):
    # Parameters:
    # klass: class to be pythonized

    # implements __radd__ as equal to __add__
    klass.__radd__ = klass.__add__

    # implements __rsub__ by assigning the function previously defined
    klass.__rsub__ = _rsub

    # implements __rmul__ as equal to __mul__
    klass.__rmul__ = klass.__mul__

    # implements __rtruediv__ by assigning the function previously defined
    # necessary for Python3
    klass.__rtruediv__ = _rtruediv
