#  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 Metrics behavior
"""
# import datetime
import os
from unittest import TestCase
from unittest.mock import patch
from uuid import uuid4

import boto3
import botocore
import pandas as pd
from moto import mock_s3

from metadata.generated.schema.entity.data.table import Column as EntityColumn
from metadata.generated.schema.entity.data.table import ColumnName, DataType, Table
from metadata.generated.schema.entity.services.connections.database.datalake.s3Config import (
    S3Config,
)
from metadata.generated.schema.entity.services.connections.database.datalakeConnection import (
    DatalakeConnection,
)
from metadata.generated.schema.security.credentials.awsCredentials import AWSCredentials
from metadata.generated.schema.tests.customMetric import CustomMetric
from metadata.profiler.interface.pandas.profiler_interface import (
    PandasProfilerInterface,
)
from metadata.profiler.processor.core import Profiler

BUCKET_NAME = "MyBucket"


@mock_s3
class MetricsTest(TestCase):
    """
    Run checks on different metrics
    """

    current_dir = os.path.dirname(__file__)
    resources_dir = os.path.join(current_dir, "resources")

    datalake_conn = DatalakeConnection(
        configSource=S3Config(
            securityConfig=AWSCredentials(
                awsAccessKeyId="fake_access_key",
                awsSecretAccessKey="fake_secret_key",
                awsRegion="us-west-1",
            )
        )
    )

    dfs = [
        pd.read_csv(os.path.join(resources_dir, "profiler_test_.csv"), parse_dates=[5])
    ]

    table_entity = Table(
        id=uuid4(),
        name="user",
        columns=[
            EntityColumn(
                name=ColumnName(__root__="id"),
                dataType=DataType.INT,
            )
        ],
    )

    def setUp(self):
        # Mock our S3 bucket and ingest a file
        boto3.DEFAULT_SESSION = None
        self.client = boto3.client(
            "s3",
            region_name="us-weat-1",
        )

        # check that we are not running our test against a real bucket
        try:
            s3 = boto3.resource(
                "s3",
                region_name="us-west-1",
                aws_access_key_id="fake_access_key",
                aws_secret_access_key="fake_secret_key",
            )
            s3.meta.client.head_bucket(Bucket=BUCKET_NAME)
        except botocore.exceptions.ClientError:
            pass
        else:
            err = f"{BUCKET_NAME} should not exist."
            raise EnvironmentError(err)
        self.client.create_bucket(
            Bucket=BUCKET_NAME,
            CreateBucketConfiguration={"LocationConstraint": "us-west-1"},
        )

        resources_paths = [
            os.path.join(path, filename)
            for path, _, files in os.walk(self.resources_dir)
            for filename in files
        ]

        self.s3_keys = []

        for path in resources_paths:
            key = os.path.relpath(path, self.resources_dir)
            self.s3_keys.append(key)
            self.client.upload_file(Filename=path, Bucket=BUCKET_NAME, Key=key)

        with patch.object(
            PandasProfilerInterface,
            "_convert_table_to_list_of_dataframe_objects",
            return_value=self.dfs,
        ):
            self.sqa_profiler_interface = PandasProfilerInterface(
                self.datalake_conn,
                None,
                self.table_entity,
                None,
                None,
                None,
                None,
                None,
                thread_count=1,
            )

    def test_table_custom_metric(self):
        table_entity = Table(
            id=uuid4(),
            name="user",
            columns=[
                EntityColumn(
                    name=ColumnName(__root__="id"),
                    dataType=DataType.INT,
                )
            ],
            customMetrics=[
                CustomMetric(
                    name="LastNameFilter",
                    expression="'last_name' != Doe",
                ),
                CustomMetric(
                    name="notUS",
                    expression="'country == US'",
                ),
            ],
        )
        with patch.object(
            PandasProfilerInterface,
            "_convert_table_to_list_of_dataframe_objects",
            return_value=self.dfs,
        ):
            self.sqa_profiler_interface = PandasProfilerInterface(
                self.datalake_conn,
                None,
                table_entity,
                None,
                None,
                None,
                None,
                None,
                thread_count=1,
            )

        profiler = Profiler(
            profiler_interface=self.sqa_profiler_interface,
        )
        metrics = profiler.compute_metrics()
        for k, v in metrics._table_results.items():
            for metric in v:
                if metric.name == "LastNameFilter":
                    assert metric.value == 1
                if metric.name == "notUS":
                    assert metric.value == 2

    def test_column_custom_metric(self):
        table_entity = Table(
            id=uuid4(),
            name="user",
            columns=[
                EntityColumn(
                    name=ColumnName(__root__="id"),
                    dataType=DataType.INT,
                    customMetrics=[
                        CustomMetric(
                            name="LastNameFilter",
                            columnName="id",
                            expression="'last_name' != Doe",
                        ),
                        CustomMetric(
                            name="notUS",
                            columnName="id",
                            expression="'country == US'",
                        ),
                    ],
                )
            ],
        )
        with patch.object(
            PandasProfilerInterface,
            "_convert_table_to_list_of_dataframe_objects",
            return_value=self.dfs,
        ):
            self.sqa_profiler_interface = PandasProfilerInterface(
                self.datalake_conn,
                None,
                table_entity,
                None,
                None,
                None,
                None,
                None,
                thread_count=1,
            )

        profiler = Profiler(
            profiler_interface=self.sqa_profiler_interface,
        )
        metrics = profiler.compute_metrics()
        for k, v in metrics._column_results.items():
            for metric in v.get("customMetrics", []):
                if metric.name == "CustomerBornedAfter1991":
                    assert metric.value == 1
                if metric.name == "AverageAge":
                    assert metric.value == 2