# Copyright 2019 Huawei Technologies Co., Ltd
#
# 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.
"""
Projected adversarial defense test.
"""
import logging

import numpy as np
import pytest
from mindspore import context
from mindspore import nn
from mindspore.nn.optim.momentum import Momentum

from mock_net import Net
from mindarmour.defenses.projected_adversarial_defense import \
    ProjectedAdversarialDefense
from mindarmour.utils.logger import LogUtil

LOGGER = LogUtil.get_instance()
TAG = 'Pad_Test'


@pytest.mark.level0
@pytest.mark.platform_arm_ascend_training
@pytest.mark.platform_x86_ascend_training
@pytest.mark.env_card
@pytest.mark.component_mindarmour
def test_pad():
    """UT for projected adversarial defense."""
    num_classes = 10
    batch_size = 32

    sparse = False
    context.set_context(mode=context.GRAPH_MODE)
    context.set_context(device_target='Ascend')

    # create test data
    inputs = np.random.rand(batch_size, 1, 32, 32).astype(np.float32)
    labels = np.random.randint(num_classes, size=batch_size).astype(np.int32)
    if not sparse:
        labels = np.eye(num_classes)[labels].astype(np.float32)

    # construct network
    net = Net()
    loss_fn = nn.SoftmaxCrossEntropyWithLogits(is_grad=False, sparse=sparse)
    optimizer = Momentum(net.trainable_params(), 0.001, 0.9)

    # defense
    pad = ProjectedAdversarialDefense(net, loss_fn=loss_fn, optimizer=optimizer)
    LOGGER.set_level(logging.DEBUG)
    LOGGER.debug(TAG, '---start projected adversarial defense--')
    loss = pad.defense(inputs, labels)
    LOGGER.debug(TAG, '---end projected adversarial defense--')
    assert np.any(loss >= 0.0)
