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# to you under the Apache License, Version 2.0 (the
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#
#   http://www.apache.org/licenses/LICENSE-2.0
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from datetime import datetime

import pytest
from numpy import nan
from numpy.testing import assert_array_equal
from pandas import DataFrame

from superset.exceptions import InvalidPostProcessingError
from superset.utils.core import DTTM_ALIAS, PostProcessingContributionOrientation
from superset.utils.pandas_postprocessing import contribution

df_template = DataFrame(
    {
        DTTM_ALIAS: [
            datetime(2020, 7, 16, 14, 49),
            datetime(2020, 7, 16, 14, 50),
            datetime(2020, 7, 16, 14, 51),
        ],
        "a": [1, 3, nan],
        "b": [1, 9, nan],
        "c": [nan, nan, nan],
    }
)


def test_non_numeric_columns():
    with pytest.raises(InvalidPostProcessingError, match="not numeric"):
        contribution(df_template.copy(), columns=[DTTM_ALIAS])


def test_rename_should_have_same_length():
    with pytest.raises(InvalidPostProcessingError, match="same length"):
        contribution(df_template.copy(), columns=["a"], rename_columns=["aa", "bb"])


def test_cell_contribution_across_row():
    processed_df = contribution(
        df_template.copy(),
        orientation=PostProcessingContributionOrientation.ROW,
    )
    assert processed_df.columns.tolist() == [DTTM_ALIAS, "a", "b", "c"]
    assert_array_equal(processed_df["a"].tolist(), [0.5, 0.25, nan])
    assert_array_equal(processed_df["b"].tolist(), [0.5, 0.75, nan])
    assert_array_equal(processed_df["c"].tolist(), [nan, nan, nan])


def test_cell_contribution_across_column_without_temporal_column():
    df = df_template.copy()
    df.pop(DTTM_ALIAS)
    processed_df = contribution(
        df, orientation=PostProcessingContributionOrientation.COLUMN
    )
    assert processed_df.columns.tolist() == ["a", "b", "c"]
    assert_array_equal(processed_df["a"].tolist(), [0.25, 0.75, 0])
    assert_array_equal(processed_df["b"].tolist(), [0.1, 0.9, 0])
    assert_array_equal(processed_df["c"].tolist(), [nan, nan, nan])


def test_contribution_on_selected_columns():
    df = df_template.copy()
    df.pop(DTTM_ALIAS)
    processed_df = contribution(
        df,
        orientation=PostProcessingContributionOrientation.COLUMN,
        columns=["a"],
        rename_columns=["pct_a"],
    )
    assert processed_df.columns.tolist() == ["a", "b", "c", "pct_a"]
    assert_array_equal(processed_df["a"].tolist(), [1, 3, nan])
    assert_array_equal(processed_df["b"].tolist(), [1, 9, nan])
    assert_array_equal(processed_df["c"].tolist(), [nan, nan, nan])
    assert processed_df["pct_a"].tolist() == [0.25, 0.75, 0]


def test_contribution_with_time_shift_columns():
    df = DataFrame(
        {
            DTTM_ALIAS: [
                datetime(2020, 7, 16, 14, 49),
                datetime(2020, 7, 16, 14, 50),
            ],
            "a": [3, 6],
            "b": [3, 3],
            "c": [6, 3],
            "a__1 week ago": [2, 2],
            "b__1 week ago": [1, 1],
            "c__1 week ago": [1, 1],
        }
    )
    processed_df = contribution(
        df,
        orientation=PostProcessingContributionOrientation.ROW,
        time_shifts=["1 week ago"],
    )
    assert processed_df.columns.tolist() == [
        DTTM_ALIAS,
        "a",
        "b",
        "c",
        "a__1 week ago",
        "b__1 week ago",
        "c__1 week ago",
    ]
    assert_array_equal(processed_df["a"].tolist(), [0.25, 0.5])
    assert_array_equal(processed_df["b"].tolist(), [0.25, 0.25])
    assert_array_equal(processed_df["c"].tolist(), [0.50, 0.25])
    assert_array_equal(processed_df["a__1 week ago"].tolist(), [0.5, 0.5])
    assert_array_equal(processed_df["b__1 week ago"].tolist(), [0.25, 0.25])
    assert_array_equal(processed_df["c__1 week ago"].tolist(), [0.25, 0.25])