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

import tensorflow.compat.v1 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 make_binary_op_tests(options,
                         binary_operator,
                         allow_fully_quantize=False,
                         expected_tf_failures=0):
  """Make a set of tests to do binary ops with and without broadcast."""

  test_parameters = [
      # Avoid creating all combinations to keep the test size small.
      {
          "dtype": [tf.float32, tf.int32],
          "input_shape_1": [[1, 3, 4, 3]],
          "input_shape_2": [[1, 3, 4, 3]],
          "activation": [True],
          "fully_quantize": [False],
      },
      {
          "dtype": [tf.float32],
          "input_shape_1": [[5]],
          "input_shape_2": [[5]],
          "activation": [False, True],
          "fully_quantize": [False],
      },
      {
          "dtype": [tf.float32, tf.int32, tf.int64],
          "input_shape_1": [[1, 3, 4, 3]],
          "input_shape_2": [[3]],
          "activation": [True, False],
          "fully_quantize": [False],
      },
      {
          "dtype": [tf.float32, tf.int32],
          "input_shape_1": [[3]],
          "input_shape_2": [[1, 3, 4, 3]],
          "activation": [True, False],
          "fully_quantize": [False],
      },
      {
          "dtype": [tf.float32],
          "input_shape_1": [[]],
          "input_shape_2": [[]],
          "activation": [False],
          "fully_quantize": [False],
      },
      {
          "dtype": [tf.float32],
          "input_shape_1": [[0]],
          "input_shape_2": [[1]],
          "activation": [False],
          "fully_quantize": [False],
      },
      {
          "dtype": [tf.float32],
          "input_shape_1": [[1, 3, 4, 3]],
          "input_shape_2": [[1, 3, 4, 3]],
          "activation": [False],
          "fully_quantize": [True],
      },
      {
          "dtype": [tf.float32],
          "input_shape_1": [[5]],
          "input_shape_2": [[5]],
          "activation": [False],
          "fully_quantize": [True],
      },
      {
          "dtype": [tf.float32],
          "input_shape_1": [[1, 3, 4, 3]],
          "input_shape_2": [[3]],
          "activation": [False],
          "fully_quantize": [True],
      },
      {
          "dtype": [tf.float32],
          "input_shape_1": [[3]],
          "input_shape_2": [[1, 3, 4, 3]],
          "activation": [False],
          "fully_quantize": [True],
      },
      {
          "dtype": [tf.float32],
          "input_shape_1": [[]],
          "input_shape_2": [[]],
          "activation": [False],
          "fully_quantize": [True],
      },
  ]

  # test_parameters include fully_quantize option only when
  # allow_fully_quantize is True.
  if not allow_fully_quantize:
    test_parameters = [
        test_parameter for test_parameter in test_parameters
        if True not in test_parameter["fully_quantize"]
    ]

  def build_graph(parameters):
    """Builds the graph given the current parameters."""
    input1 = tf.compat.v1.placeholder(
        dtype=parameters["dtype"],
        name="input1",
        shape=parameters["input_shape_1"])
    input2 = tf.compat.v1.placeholder(
        dtype=parameters["dtype"],
        name="input2",
        shape=parameters["input_shape_2"])
    out = binary_operator(input1, input2)
    # TODO(karimnosseir): Update condition after moving to new converter.
    if parameters["activation"] and (not options.use_experimental_converter or
                                     (parameters["dtype"] != tf.int32 and
                                      parameters["dtype"] != tf.int64)):
      out = tf.nn.relu(out)
    return [input1, input2], [out]

  def build_inputs(parameters, sess, inputs, outputs):
    """Builds operand inputs for op."""
    if allow_fully_quantize:
      input1 = create_tensor_data(
          parameters["dtype"],
          parameters["input_shape_1"],
          min_value=-1,
          max_value=1)
      input2 = create_tensor_data(
          parameters["dtype"],
          parameters["input_shape_2"],
          min_value=-1,
          max_value=1)
    else:
      input1 = create_tensor_data(parameters["dtype"],
                                  parameters["input_shape_1"])
      input2 = create_tensor_data(parameters["dtype"],
                                  parameters["input_shape_2"])
    return [input1, input2], sess.run(
        outputs, feed_dict={
            inputs[0]: input1,
            inputs[1]: input2
        })

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


def make_binary_op_tests_func(binary_operator):
  """Return a function that does a test on a binary operator."""
  return lambda options: make_binary_op_tests(options, binary_operator)


@register_make_test_function()
def make_add_tests(options):
  make_binary_op_tests(options, tf.add, allow_fully_quantize=True)


@register_make_test_function()
def make_div_tests(options):
  make_binary_op_tests(options, tf.compat.v1.div)


@register_make_test_function()
def make_sub_tests(options):
  make_binary_op_tests(options, tf.subtract, allow_fully_quantize=True)


@register_make_test_function()
def make_mul_tests(options):
  make_binary_op_tests(options, tf.multiply, allow_fully_quantize=True)


@register_make_test_function()
def make_pow_tests(options):
  make_binary_op_tests(options, tf.pow, expected_tf_failures=7)


@register_make_test_function()
def make_floor_div_tests(options):
  make_binary_op_tests(options, tf.math.floordiv)


@register_make_test_function()
def make_floor_mod_tests(options):
  make_binary_op_tests(options, tf.math.floormod)


@register_make_test_function()
def make_squared_difference_tests(options):
  make_binary_op_tests(options, tf.math.squared_difference)
