# Copyright 2019 The TensorFlow 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.
# ==============================================================================
"""Test configs for depthwiseconv."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

import numpy as np
import tensorflow as tf
from tensorflow.lite.testing.zip_test_utils import create_tensor_data
from tensorflow.lite.testing.zip_test_utils import make_zip_of_tests
from tensorflow.lite.testing.zip_test_utils import register_make_test_function


@register_make_test_function()
def make_depthwiseconv_tests(options):
  """Make a set of tests to do convolution."""

  # Tensorflow only supports equal strides
  test_parameters = [
      {
          "input_shape": [[1, 3, 4, 3], [1, 10, 10, 3]],
          "filter_size": [[1, 1], [1, 2], [3, 3]],
          "strides": [[1, 1, 1, 1], [1, 3, 3, 1]],
          "dilations": [[1, 1, 1, 1], [1, 3, 2, 1], [1, 2, 2, 1]],
          "channel_multiplier": [1, 2],
          "rate": [[1, 1]],
          "padding": ["SAME", "VALID"],
          "data_format": ["NHWC"],
          "constant_filter": [True, False],
          "fully_quantize": [False]
      },
      {
          "input_shape": [[1, 3, 4, 3]],
          "filter_size": [[1, 1]],
          "strides": [[1, 1, 2, 1]],  # TF needs [1, x, x, 1]
          "dilations": [[1, 1, 1, 1], [1, 2, 2, 1]],
          "channel_multiplier": [2],
          "rate": [[2, 2]],  #  Only [1, 1] is supported
          "padding": ["SAME"],
          "data_format": ["NHWC"],
          "constant_filter": [True, False],
          "fully_quantize": [False]
      },
      {
          "input_shape": [[1, 3, 4, 3], [1, 10, 10, 3]],
          "filter_size": [[1, 1], [1, 2], [3, 3]],
          "strides": [[1, 1, 1, 1], [1, 3, 3, 1]],
          "dilations": [[1, 1, 1, 1], [1, 3, 2, 1], [1, 2, 2, 1]],
          "channel_multiplier": [1, 2],
          "rate": [[1, 1]],
          "padding": ["SAME", "VALID"],
          "data_format": ["NHWC"],
          "constant_filter": [True],
          "fully_quantize": [True]
      },
  ]

  def get_tensor_shapes(parameters):
    input_shape = parameters["input_shape"]
    filter_size = parameters["filter_size"]
    filter_shape = filter_size + [
        input_shape[3], parameters["channel_multiplier"]
    ]
    return [input_shape, filter_shape]

  def build_graph(parameters):
    """Build a depthwise conv graph given `parameters`."""
    input_shape, filter_shape = get_tensor_shapes(parameters)
    input_tensor = tf.compat.v1.placeholder(
        dtype=tf.float32, name="input", shape=input_shape)

    # Get filter input either as a placeholder or constants. Also get a list of
    # the input tensors that are represented as placeholders.
    if parameters["constant_filter"]:
      filter_input = create_tensor_data(np.float32, filter_shape)
      input_tensors = [input_tensor]
    else:
      filter_input = tf.compat.v1.placeholder(
          dtype=tf.float32, name="filter", shape=filter_shape)
      input_tensors = [input_tensor, filter_input]

    out = tf.nn.depthwise_conv2d(
        input_tensor,
        filter_input,
        strides=parameters["strides"],
        rate=parameters["rate"],
        padding=parameters["padding"],
        data_format=parameters["data_format"])
    return input_tensors, [out]

  def build_inputs(parameters, sess, inputs, outputs):
    # pylint: disable=g-doc-return-or-yield, g-doc-args
    """Build list of input values.

    It either contains 1 tensor (input) or 2 tensors (input, filter) based on
    whether filter is constant or variable input.
    """

    input_shape, filter_shape = get_tensor_shapes(parameters)
    values = [
        create_tensor_data(np.float32, input_shape, min_value=-1, max_value=1)
    ]
    if not parameters["constant_filter"]:
      values.append(
          create_tensor_data(
              np.float32, filter_shape, min_value=-1, max_value=1))
    return values, sess.run(outputs, feed_dict=dict(zip(inputs, values)))

  make_zip_of_tests(
      options,
      test_parameters,
      build_graph,
      build_inputs,
      expected_tf_failures=4)
