# Copyright (C) 2018-2021 Intel Corporation
# SPDX-License-Identifier: Apache-2.0

import unittest

import numpy as np

from openvino.tools.mo.ops.Reverse import Reverse
from openvino.tools.mo.front.common.extractors.utils import layout_attrs
from openvino.tools.mo.graph.graph import Node
from unit_tests.utils.graph import build_graph

nodes_attributes = {'node_1': {'type': 'Identity', 'kind': 'op'},
                    'node_1_data': {'type': 'Identity', 'kind': 'data', 'value': np.array([[1, 3, 227, 227]])},
                    'node_2': {'type': 'Identity', 'kind': 'op'},
                    'node_2_data': {'kind': 'data', 'value': np.array([1])},
                    'reverse': {'type': 'Reverse', 'kind': 'op', },
                    'node_3': {'type': 'Identity', 'kind': 'op'},
                    'op_output': { 'kind': 'op', 'op': 'Result'}
                    }

class TestReverse(unittest.TestCase):
    def test_reverse_infer(self):
        graph = build_graph(nodes_attributes,
                            [
                             ('node_1', 'node_1_data'),
                             ('node_1_data', 'reverse'),
                             ('node_2', 'node_2_data'),
                             ('node_2_data', 'reverse'),
                             ('reverse', 'node_3'),
                             ('node_3', 'op_output')
                             ],
                            {'node_3': {'shape': None, 'value': None},
                             'node_1_data': {'shape': np.array([1, 4])},
                             'reverse': {'stride': 2,
                                       **layout_attrs()}
                             })

        reverse_node = Node(graph, 'reverse')
        Reverse.infer(reverse_node)
        exp_shape = np.array([1, 4])
        exp_value = np.array([[227, 227, 3, 1]])
        res_shape = graph.node['node_3']['shape']
        res_value = graph.node['node_3']['value']
        for i in range(0, len(exp_shape)):
            self.assertEqual(exp_shape[i], res_shape[i])
        for i in range(0, len(exp_value[0])):
            self.assertEqual(exp_value[0][i], res_value[0][i])
