# 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 hardswish."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

import functools

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


def _tflite_convert_verify_num_ops(tflite_convert_function, *args, **kwargs):
  """Verifies that the result of the conversion is a single op."""
  num_ops = kwargs.pop("num_ops", 2)
  result = tflite_convert_function(*args, **kwargs)
  tflite_model_binary = result[0]
  if not result[0]:
    tf.compat.v1.logging.error(result[1])  # stderr from running tflite_convert.
    raise RuntimeError("Failed to bulid model: \n\n" + result[1])
  interpreter = tf.lite.Interpreter(model_content=tflite_model_binary)
  interpreter.allocate_tensors()
  if len(interpreter.get_tensor_details()) != num_ops:
    raise RuntimeError(
        "Expected to generate two node graph got %s " %
        "\n".join(str(x) for x in interpreter.get_tensor_details()))
  return result


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

  # Chose a set of parameters
  test_parameters = [{
      "input_shape": [[], [1], [2, 3], [1, 1, 1, 1], [1, 3, 4, 3],
                      [3, 15, 14, 3], [3, 1, 2, 4, 6], [2, 2, 3, 4, 5, 6]],
  }]

  def build_graph(parameters):
    inp = tf.compat.v1.placeholder(
        dtype=tf.float32, name="input", shape=parameters["input_shape"])
    out = inp * tf.nn.relu6(inp + np.float32(3)) * np.float32(1. / 6.)

    return [inp], [out]

  def build_inputs(parameters, sess, inputs, outputs):
    input_values = create_tensor_data(
        np.float32, parameters["input_shape"], min_value=-10, max_value=10)
    return [input_values], sess.run(
        outputs, feed_dict=dict(zip(inputs, [input_values])))

  # Add additional validation if we are using toco.
  # Flex doesn't yet support this.
  if not options.run_with_flex:
    options.tflite_convert_function = functools.partial(
        _tflite_convert_verify_num_ops,
        options.tflite_convert_function,
        num_ops=2)
  make_zip_of_tests(options, test_parameters, build_graph, build_inputs)
