#  Copyright 2021 Collate
#  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 datalake utils
"""

from unittest import TestCase

from metadata.generated.schema.entity.data.table import Column
from metadata.utils.datalake.datalake_utils import (
    construct_json_column_children,
    unique_json_structure,
)

STRUCTURE = {
    "a": "w",
    "b": 4,
    "c": {
        "d": 2,
        "e": 4,
        "f": {
            "g": 9,
            "h": {"i": 6},
            "n": {
                "o": 10,
                "p": 11,
            },
        },
        "j": 7,
        "k": 8,
    },
}


class TestDatalakeUtils(TestCase):
    """class for datalake utils test"""

    def test_unique_json_structure(self):
        """test unique json structure fn"""
        sample_data = [
            {"a": "x", "b": 1, "c": {"d": 2}},
            {"a": "y", "b": 2, "c": {"e": 4, "f": {"g": 5, "h": {"i": 6}, "n": 5}}},
            {"a": "z", "b": 3, "c": {"j": 7}},
            {"a": "w", "b": 4, "c": {"k": 8, "f": {"g": 9, "n": {"o": 10, "p": 11}}}},
        ]
        expected = STRUCTURE

        actual = unique_json_structure(sample_data)

        self.assertDictEqual(expected, actual)

    def test_construct_column(self):
        """test construct column fn"""
        expected = [
            {
                "dataTypeDisplay": "STRING",
                "dataType": "STRING",
                "name": "a",
                "displayName": "a",
            },
            {
                "dataTypeDisplay": "INT",
                "dataType": "INT",
                "name": "b",
                "displayName": "b",
            },
            {
                "dataTypeDisplay": "JSON",
                "dataType": "JSON",
                "name": "c",
                "displayName": "c",
                "children": [
                    {
                        "dataTypeDisplay": "INT",
                        "dataType": "INT",
                        "name": "d",
                        "displayName": "d",
                    },
                    {
                        "dataTypeDisplay": "INT",
                        "dataType": "INT",
                        "name": "e",
                        "displayName": "e",
                    },
                    {
                        "dataTypeDisplay": "JSON",
                        "dataType": "JSON",
                        "name": "f",
                        "displayName": "f",
                        "children": [
                            {
                                "dataTypeDisplay": "INT",
                                "dataType": "INT",
                                "name": "g",
                                "displayName": "g",
                            },
                            {
                                "dataTypeDisplay": "JSON",
                                "dataType": "JSON",
                                "name": "h",
                                "displayName": "h",
                                "children": [
                                    {
                                        "dataTypeDisplay": "INT",
                                        "dataType": "INT",
                                        "name": "i",
                                        "displayName": "i",
                                    }
                                ],
                            },
                            {
                                "dataTypeDisplay": "JSON",
                                "dataType": "JSON",
                                "name": "n",
                                "displayName": "n",
                                "children": [
                                    {
                                        "dataTypeDisplay": "INT",
                                        "dataType": "INT",
                                        "name": "o",
                                        "displayName": "o",
                                    },
                                    {
                                        "dataTypeDisplay": "INT",
                                        "dataType": "INT",
                                        "name": "p",
                                        "displayName": "p",
                                    },
                                ],
                            },
                        ],
                    },
                    {
                        "dataTypeDisplay": "INT",
                        "dataType": "INT",
                        "name": "j",
                        "displayName": "j",
                    },
                    {
                        "dataTypeDisplay": "INT",
                        "dataType": "INT",
                        "name": "k",
                        "displayName": "k",
                    },
                ],
            },
        ]
        actual = construct_json_column_children(STRUCTURE)

        for el in zip(expected, actual):
            self.assertDictEqual(el[0], el[1])

    def test_create_column_object(self):
        """test create column object fn"""
        formatted_column = construct_json_column_children(STRUCTURE)
        column = {
            "dataTypeDisplay": "STRING",
            "dataType": "STRING",
            "name": "a",
            "displayName": "a",
            "children": formatted_column,
        }
        column_obj = Column(**column)
        assert len(column_obj.children) == 3