#   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from __future__ import print_function
import os
from .layer_function_generator import generate_layer_fn, generate_layer_fn_noattr
from .. import core
from ..framework import convert_np_dtype_to_dtype_

__activations_noattr__ = [
    'sigmoid',
    'logsigmoid',
    'exp',
    'tanh',
    'tanh_shrink',
    'softshrink',
    'sqrt',
    'abs',
    'ceil',
    'floor',
    'cos',
    'sin',
    'round',
    'reciprocal',
    'square',
    'softplus',
    'softsign',
]

__all__ = []

for _OP in set(__all__):
    globals()[_OP] = generate_layer_fn(_OP)

# It is a hot fix in some unittest using:
#   fluid.layers.scale(x=x, scale=10.0, out=out_var)
# e.g.: test_program_code.py, test_dist_train.py
globals()['_scale'] = generate_layer_fn('scale')

globals()['_elementwise_div'] = generate_layer_fn('elementwise_div')

__all__ += __activations_noattr__

for _OP in set(__activations_noattr__):
    globals()[_OP] = generate_layer_fn_noattr(_OP)

__all__ += ["uniform_random"]

_uniform_random_ = generate_layer_fn('uniform_random')


def uniform_random(shape, dtype=None, min=None, max=None, seed=None):
    locals_var = locals().keys()
    if not isinstance(dtype, core.VarDesc.VarType):
        dtype = convert_np_dtype_to_dtype_(dtype)
    kwargs = dict()
    for name in locals_var:
        val = locals()[name]
        if val is not None:
            kwargs[name] = val
    return _uniform_random_(**kwargs)


uniform_random.__doc__ = _uniform_random_.__doc__ + """
Examples:

    >>> result = fluid.layers.uniform_random(shape=[32, 784])
"""

__all__ += ['hard_shrink']

_hard_shrink_ = generate_layer_fn('hard_shrink')


def hard_shrink(x, threshold=None):
    locals_var = locals().keys()
    kwargs = dict()
    for name in locals_var:
        val = locals()[name]
        if val is not None:
            kwargs[name] = val
    return _hard_shrink_(**kwargs)


hard_shrink.__doc__ = _hard_shrink_.__doc__ + """
Examples:

    >>> data = fluid.layers.data(name="input", shape=[784])
    >>> result = fluid.layers.hard_shrink(x=data, threshold=0.3)
"""

if os.name != 'nt':
    __all__ += ['cumsum']

    _cum_sum_ = generate_layer_fn('cumsum')

    def cumsum(x, axis=None, exclusive=None, reverse=None):
        locals_var = locals().keys()
        kwargs = dict()
        for name in locals_var:
            val = locals()[name]
            if val is not None:
                kwargs[name] = val
        return _cum_sum_(**kwargs)

    cumsum.__doc__ = _cum_sum_.__doc__ + """
    Examples:
    
        >>> data = fluid.layers.data(name="input", shape=[32, 784])
        >>> result = fluid.layers.cumsum(data, axis=0)
    """

__all__ += ['thresholded_relu']

_thresholded_relu_ = generate_layer_fn('thresholded_relu')


def thresholded_relu(x, threshold=None):
    locals_var = locals().keys()
    kwargs = dict()
    for name in locals_var:
        val = locals()[name]
        if val is not None:
            kwargs[name] = val

    _thresholded_relu_(**kwargs)


thresholded_relu.__doc__ = _thresholded_relu_.__doc__ + """
Examples:

    >>> data = fluid.layers.data(name="input", shape=[1])
    >>> result = fluid.layers.thresholded_relu(data, threshold=0.4)
"""