# Copyright (c) 2021 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.

import unittest

import numpy as np

from paddle import enable_static
from paddle.fluid import core
from paddle.fluid.tests.unittests.eager_op_test import (
    OpTest,
    convert_float_to_uint16,
)
from paddle.fluid.tests.unittests.test_conv2d_transpose_op import (
    conv2dtranspose_forward_naive,
)


def conv2d_bias_naive(out, bias):
    _, out_c, _, _ = out.shape

    for l in range(out_c):
        out[:, l, :, :] = out[:, l, :, :] + bias[l]
    return out


@unittest.skipIf(
    not core.supports_bfloat16(), "place does not support BF16 evaluation"
)
class TestConv2DTransposeBF16MKLDNNOp(OpTest):
    def test_check_output(self):
        self.check_output_with_place(core.CPUPlace())

    def test_check_grad(self):
        pass

    def test_check_grad_no_input(self):
        pass

    def test_check_grad_no_filter(self):
        pass

    def init_op_type(self):
        self.data_format = "NCHW"
        self.op_type = 'conv2d_transpose'
        self._cpu_only = True

    def init_test_case(self):
        self.pad = [0, 0]
        self.fuse_bias = False
        self.use_mkldnn = True
        self.is_test = True
        self.bias_size = None
        self.fuse_activation = ""
        self.fuse_alpha = 0.0
        self.fuse_beta = 0.0
        self.stride = [1, 1]
        self.dilations = [1, 1]
        self.input_size = [2, 3, 5, 5]  # NCHW
        f_c = self.input_size[1]
        self.filter_size = [f_c, 6, 3, 3]
        self.groups = 1
        self.output_size = None
        self.output_padding = []
        self.data_format = "NCHW"
        self.pad = [0, 0]
        self.padding_algorithm = "EXPLICIT"
        self.force_fp32_output = False

    def setUp(self):
        self.input_type = np.uint16
        self.dtype = np.uint16
        self.mkldnn_data_type = "bfloat16"
        self.init_op_type()
        self.init_test_case()

        input = np.random.random(self.input_size).astype(np.float32)
        filter = np.random.random(self.filter_size).astype(np.float32)

        self.attrs = {
            'strides': self.stride,
            'paddings': self.pad,
            'padding_algorithm': self.padding_algorithm,
            'groups': self.groups,
            'dilations': self.dilations,
            'is_test': self.is_test,
            'use_mkldnn': self.use_mkldnn,
            'mkldnn_data_type': self.mkldnn_data_type,
            'force_fp32_output': self.force_fp32_output,
            'data_format': self.data_format,
            'fuse_activation': self.fuse_activation,
            'fuse_alpha': self.fuse_alpha,
            'fuse_beta': self.fuse_beta,
        }
        if self.output_size is not None:
            self.attrs['output_size'] = self.output_size

        if len(self.output_padding) > 0:
            self.attrs['output_padding'] = self.output_padding

        output = conv2dtranspose_forward_naive(
            input, filter, self.attrs
        ).astype(np.float32)

        if self.input_type is not np.float32:
            input = convert_float_to_uint16(input)

        self.inputs = {
            'Input': input.view(self.input_type),
            'Filter': OpTest.np_dtype_to_fluid_dtype(filter),
        }

        if self.fuse_bias and self.bias_size is not None:
            bias = np.random.random(self.bias_size).astype(np.float32)
            output = conv2d_bias_naive(output, bias)
            output = output.astype(np.float32)
            self.attrs['fuse_bias'] = self.fuse_bias
            self.inputs['Bias'] = OpTest.np_dtype_to_fluid_dtype(bias)

        if self.fuse_activation == "relu":
            output = np.maximum(output, 0).astype(np.float32)
        output = output.astype(np.float32)

        if not self.force_fp32_output:
            output = convert_float_to_uint16(output, self.attrs['data_format'])

        self.outputs['Output'] = output


class TestMKLDNNFuseBias(TestConv2DTransposeBF16MKLDNNOp):
    def init_test_case(self):
        super().init_test_case()
        self.pad = [1, 1]
        self.fuse_bias = True
        self.bias_size = [6]


class TestMKLDNNWithPad(TestConv2DTransposeBF16MKLDNNOp):
    def init_test_case(self):
        super().init_test_case()
        self.pad = [1, 1]
        self.input_size = [2, 3, 10, 10]


class TestMKLDNNWithStride(TestConv2DTransposeBF16MKLDNNOp):
    def init_test_case(self):
        super().init_test_case()
        self.pad = [1, 1]
        self.stride = [2, 2]
        self.input_size = [2, 3, 6, 6]  # NCHW


class TestMKLDNNWithAsymPad(TestConv2DTransposeBF16MKLDNNOp):
    def init_test_case(self):
        super().init_test_case()
        self.pad = [0, 0, 1, 2]
        self.padding_algorithm = "EXPLICIT"


class TestMKLDNNWithSamePad(TestConv2DTransposeBF16MKLDNNOp):
    def init_test_case(self):
        super().init_test_case()
        self.pad = [0, 0]
        self.padding_algorithm = "SAME"


class TestMKLDNNWithValidPad(TestConv2DTransposeBF16MKLDNNOp):
    def init_test_case(self):
        super().init_test_case()
        self.pad = [1, 1]
        self.padding_algorithm = "VALID"


class TestMKLDNNWithValidPad_NHWC(TestMKLDNNWithValidPad):
    def init_test_case(self):
        super().init_test_case()
        self.data_format = 'NHWC'
        N, C, H, W = self.input_size
        self.input_size = [N, H, W, C]


class TestConv2DTransposeMKLDNNWithDilationsExplicitPad(
    TestConv2DTransposeBF16MKLDNNOp
):
    def init_test_case(self):
        super().init_test_case()
        self.stride = [2, 1]
        self.dilations = [1, 2]
        self.groups = 1
        self.input_size = [4, 3, 8, 7]  # NCHW
        f_c = self.input_size[1]
        self.filter_size = [f_c, 6, 4, 3]
        self.pad = [1, 3, 2, 1]
        self.padding_algorithm = "EXPLICIT"


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