#   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 unittest
import paddle
import numpy as np
import sys
sys.path.append("..")
from op_test_xpu import XPUOpTest

paddle.enable_static()


class TestLabelSmoothOp(XPUOpTest):
    def config(self):
        self.op_type = "label_smooth"
        self.epsilon = 0.1
        self.use_xpu = True
        batch_size, self.label_dim = 10, 12
        self.label = np.zeros((batch_size, self.label_dim)).astype("float32")
        nonzero_index = np.random.randint(self.label_dim, size=(batch_size))
        self.label[np.arange(batch_size), nonzero_index] = 1

    def setUp(self):
        self.config()
        smoothed_label = (1 - self.epsilon
                          ) * self.label + self.epsilon / self.label_dim
        self.inputs = {'X': self.label}
        self.attrs = {'epsilon': self.epsilon}
        self.outputs = {'Out': smoothed_label}

    def test_check_output(self):
        if not paddle.is_compiled_with_xpu():
            return
        self.check_output_with_place(paddle.XPUPlace(0), atol=1e-6)

    def test_check_grad(self):
        return


class TestLabelSmoothOp3D(TestLabelSmoothOp):
    def setUp(self):
        super(TestLabelSmoothOp3D, self).setUp()
        self.inputs['X'] = self.inputs['X'].reshape(
            [2, -1, self.inputs['X'].shape[-1]])
        self.outputs['Out'] = self.outputs['Out'].reshape(self.inputs['X']
                                                          .shape)


if __name__ == '__main__':
    unittest.main()
