"""
 Copyright (C) 2018-2020 Intel Corporation

 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.
"""
import io
import numpy as np
import struct
import unittest

from mo.front.kaldi.loader.loader import load_topology_map, load_components
from mo.graph.graph import Graph, Node
from mo.utils.unittest.graph import build_graph
from mo.utils.ir_engine.compare_graphs import compare_graphs


class TestKaldiModelsLoading(unittest.TestCase):

    def test_component_map_loading_sequence(self):
        test_map = "input-node name=input dim=16 \n" + \
                   "component-node name=lda component=lda input=input \n" + \
                   "component-node name=tdnn1.affine component=tdnn1.affine input=lda \n" + \
                   "component-node name=tdnn1.relu component=tdnn1.relu input=tdnn1.affine \n" + \
                   "component-node name=tdnn1.batchnorm component=tdnn1.batchnorm input=tdnn1.relu \n\n"
        graph = Graph(name="test_graph_component_map_loading_sequence")

        test_top_map = load_topology_map(io.BytesIO(bytes(test_map, 'ascii')), graph)

        ref_map = {b"lda": ["lda"],
                   b"tdnn1.affine": ["tdnn1.affine"],
                   b"tdnn1.relu": ["tdnn1.relu"],
                   b"tdnn1.batchnorm": ["tdnn1.batchnorm"]}
        self.assertEqual(test_top_map, ref_map)
        self.assertTrue("input" in graph.nodes())
        self.assertListEqual(list(Node(graph, 'input')['shape']), [1, 16])

        ref_graph = build_graph({'input': {'shape': np.array([1, 16]), 'kind': 'op', 'op': 'Parameter'},
                                 'lda': {'kind': 'op'},
                                 'tdnn1.affine': {'kind': 'op'},
                                 'tdnn1.relu': {'kind': 'op'},
                                 'tdnn1.batchnorm': {'kind': 'op'},
                                 },
                                [
                                    ('input', 'lda'),
                                    ('lda', 'tdnn1.affine'),
                                    ('tdnn1.affine', 'tdnn1.relu'),
                                    ('tdnn1.relu', 'tdnn1.batchnorm'),
                                ]
                                )
        (flag, resp) = compare_graphs(graph, ref_graph, 'tdnn1.batchnorm')
        self.assertTrue(flag, resp)

    # NOTE: this test is disabled because it's broken and need to be fixed! Merge request 948.
    # Fail in load_topology_map() in read_node() method - we create edge with node which doesn't exist in graph
    def test_component_map_loading_swap(self):
        test_map = "input-node name=input dim=16 \n" + \
                   "component-node name=lda component=lda input=input \n" + \
                   "component-node name=tdnn1.batchnorm component=tdnn1.batchnorm input=tdnn1.relu \n" + \
                   "component-node name=tdnn1.relu component=tdnn1.relu input=tdnn1.affine \n" + \
                   "component-node name=tdnn1.affine component=tdnn1.affine input=lda \n" + \
                   "\n"
        graph = Graph(name="test_graph_component_map_loading_swap")

        test_top_map = load_topology_map(io.BytesIO(bytes(test_map, 'ascii')), graph)

        ref_map = {b"lda": ["lda"],
                   b"tdnn1.affine": ["tdnn1.affine"],
                   b"tdnn1.relu": ["tdnn1.relu"],
                   b"tdnn1.batchnorm": ["tdnn1.batchnorm"]}
        self.assertEqual(test_top_map, ref_map)
        self.assertTrue("input" in graph.nodes())
        self.assertListEqual(list(Node(graph, 'input')['shape']), [1, 16])

        ref_graph = build_graph({'input': {'shape': np.array([1, 16]), 'kind': 'op', 'op': 'Parameter'},
                                 'lda': {'kind': 'op'},
                                 'tdnn1.affine': {'kind': 'op'},
                                 'tdnn1.relu': {'kind': 'op'},
                                 'tdnn1.batchnorm': {'kind': 'op'},
                                 },
                                [
                                    ('input', 'lda'),
                                    ('lda', 'tdnn1.affine'),
                                    ('tdnn1.affine', 'tdnn1.relu'),
                                    ('tdnn1.relu', 'tdnn1.batchnorm'),
                                ]
                                )
        (flag, resp) = compare_graphs(graph, ref_graph, 'tdnn1.batchnorm')
        self.assertTrue(flag, resp)

    def test_component_map_loading_append(self):
        test_map = "input-node name=input dim=16 \n" + \
                   "component-node name=lda component=lda input=input \n" + \
                   "component-node name=tdnn1.affine component=tdnn1.affine input=Append(input, lda) \n" + \
                   "component-node name=tdnn1.relu component=tdnn1.relu input=Append(tdnn1.affine, input, lda) \n" + \
                   "\n"
        graph = Graph(name="test_graph_component_map_loading_append")

        test_top_map= load_topology_map(io.BytesIO(bytes(test_map, 'ascii')), graph)

        ref_map = {b"lda": ["lda"],
                   b"tdnn1.affine": ["tdnn1.affine"],
                   b"tdnn1.relu": ["tdnn1.relu"]}
        self.assertEqual(test_top_map, ref_map)
        self.assertTrue("input" in graph.nodes())
        self.assertListEqual(list(Node(graph, 'input')['shape']), [1, 16])

        ref_graph = build_graph({'input': {'shape': np.array([1, 16]), 'kind': 'op', 'op': 'Parameter'},
                                 'lda': {'kind': 'op'},
                                 'tdnn1.affine': {'kind': 'op'},
                                 'tdnn1.relu': {'kind': 'op'},
                                 'append_input_lda': {'kind': 'op', 'op': 'Concat'},
                                 'append_affine_input_lda': {'kind': 'op', 'op': 'Concat'},
                                 },
                                [
                                    ('input', 'lda', {'out': 0}),
                                    ('lda', 'append_input_lda', {'in': 1, 'out': 0}),
                                    ('input', 'append_input_lda', {'in': 0, 'out': 1}),
                                    ('append_input_lda', 'tdnn1.affine', {'out': 0}),
                                    ('input', 'append_affine_input_lda', {'in': 1, 'out': 2}),
                                    ('lda', 'append_affine_input_lda', {'in': 2, 'out': 1}),
                                    ('tdnn1.affine', 'append_affine_input_lda', {'in': 0, 'out': 0}),
                                    ('append_affine_input_lda', 'tdnn1.relu', {'out': 0}),
                                ]
                                )

        (flag, resp) = compare_graphs(graph, ref_graph, 'tdnn1.relu')
        self.assertTrue(flag, resp)

    def test_component_map_loading_offset(self):
        test_map = "input-node name=input dim=16\n" + \
                   "component-node name=lda component=lda input=Offset(input, -3)\n" + \
                   "component-node name=tdnn1.affine component=tdnn1.affine input=Append(Offset(input, -1), Offset(lda, 1))\n" + \
                   "component-node name=tdnn1.relu component=tdnn1.relu input=tdnn1.affine\n" + \
                   "\n"
        graph = Graph(name="test_graph_component_map_loading_offset")

        test_top_map= load_topology_map(io.BytesIO(bytes(test_map, 'ascii')), graph)

        ref_map = {b"lda": ["lda"],
                   b"tdnn1.affine": ["tdnn1.affine"],
                   b"tdnn1.relu": ["tdnn1.relu"]}
        self.assertEqual(test_top_map, ref_map)
        self.assertTrue("input" in graph.nodes())
        self.assertListEqual(list(Node(graph, 'input')['shape']), [1, 16])

        ref_graph = build_graph({'input': {'shape': np.array([1, 16]), 'kind': 'op', 'op': 'Parameter'},
                                 'lda': {'kind': 'op'},
                                 'tdnn1.affine': {'kind': 'op'},
                                 'tdnn1.relu': {'kind': 'op'},
                                 'append_input_lda': {'kind': 'op', 'op': 'Concat'},
                                 'offset_in_input_3': {'kind': 'op', 'op': 'memoryoffset', 't': -3, 'pair_name': 'offset_out_input_3'},
                                 'offset_in_input_1': {'kind': 'op', 'op': 'memoryoffset', 't': -1, 'pair_name': 'offset_out_input_1'},
                                 'offset_in_lda_1': {'kind': 'op', 'op': 'memoryoffset', 't': -1, 'pair_name': 'offset_out_lda_1'},
                                 },
                                [
                                    ('input', 'offset_in_input_3', {'out': 0}),
                                    ('offset_in_input_3', 'lda', {'out': 0}),
                                    ('lda', 'offset_in_lda_1', {'out': 0}),
                                    ('input', 'offset_in_input_1', {'out': 1}),
                                    ('offset_in_lda_1', 'append_input_lda', {'in': 1, 'out': 0}),
                                    ('offset_in_input_1', 'append_input_lda', {'in': 0, 'out': 0}),
                                    ('append_input_lda', 'tdnn1.affine', {'out': 0}),
                                    ('tdnn1.affine', 'tdnn1.relu', {'out': 0}),
                                ]
                                )

        (flag, resp) = compare_graphs(graph, ref_graph, 'tdnn1.relu')
        self.assertTrue(flag, resp)

    def test_load_components(self):
        test_map = b"<NumComponents> " + struct.pack('B', 4) + struct.pack('I', 3) + \
                   b"<ComponentName> lda <FixedAffineComponent> <LinearParams> </FixedAffineComponent> " + \
                   b"<ComponentName> tdnn1.affine <NaturalGradientAffineComponent> <MaxChange>  @?<LearningRate> <LinearParams> </NaturalGradientAffineComponent> " + \
                   b"<ComponentName> tdnn1.relu <RectifiedLinearComponent> <ValueAvg> FV </RectifiedLinearComponent>"

        graph = build_graph({'input': {'shape': np.array([1, 16]), 'kind': 'op', 'op': 'Parameter'},
                             'lda': {'kind': 'op', 'op': 'fixedaffinecomponent'},
                             'tdnn1.affine': {'kind': 'op', 'op': 'fixedaffinecomponent'},
                             'tdnn1.relu': {'kind': 'op', 'op': 'relu'},
                             },
                            [
                                ('input', 'lda'),
                                ('lda', 'tdnn1.affine'),
                                ('tdnn1.affine', 'tdnn1.relu'),
                            ]
                            )

        ref_map = {b"lda": ["lda"],
                   b"tdnn1.affine": ["tdnn1.affine"],
                   b"tdnn1.relu": ["tdnn1.relu"]}

        load_components(io.BytesIO(test_map), graph, ref_map)

        ref_graph = build_graph({'input': {'shape': np.array([1, 16]), 'kind': 'op', 'op': 'Parameter'},
                                 'lda': {'kind': 'op', 'op': 'fixedaffinecomponent', 'parameters': '<LinearParams> '},
                                 'tdnn1.affine': {'kind': 'op', 'op': 'naturalgradientaffinecomponent', 'parameters': "<MaxChange>  @?<LearningRate> ·С8<LinearParams> "},
                                 'tdnn1.relu': {'kind': 'op', 'op': 'rectifiedlinearcomponent', 'parameters': "<Dim>   <ValueAvg> FV "},
                                 },
                                [
                                    ('input', 'lda'),
                                    ('lda', 'tdnn1.affine'),
                                    ('tdnn1.affine', 'tdnn1.relu'),
                                ]
                                )
        (flag, resp) = compare_graphs(graph, ref_graph, 'tdnn1.relu')
        self.assertTrue(flag, resp)
