import numpy as np
import pandas as pd
import pytest
import woodwork as ww
from pandas.testing import assert_frame_equal, assert_series_equal
from woodwork.logical_types import Boolean, Categorical, Double, Integer

from evalml.pipelines.components import TextFeaturizer
from evalml.utils import infer_feature_types


def test_featurizer_only_text(text_df):
    X = text_df
    tf = TextFeaturizer()
    tf.fit(X)

    expected_col_names = set(['DIVERSITY_SCORE(col_1)',
                              'DIVERSITY_SCORE(col_2)',
                              'LSA(col_1)[0]',
                              'LSA(col_1)[1]',
                              'LSA(col_2)[0]',
                              'LSA(col_2)[1]',
                              'MEAN_CHARACTERS_PER_WORD(col_1)',
                              'MEAN_CHARACTERS_PER_WORD(col_2)',
                              'POLARITY_SCORE(col_1)',
                              'POLARITY_SCORE(col_2)'])
    X_t = tf.transform(X)
    assert set(X_t.columns) == expected_col_names
    assert len(X_t.columns) == 10
    assert set(X_t.logical_types.values()) == {ww.logical_types.Double}


def test_featurizer_with_nontext(text_df):
    X = text_df
    X['col_3'] = [73.7, 67.213, 92]
    tf = TextFeaturizer()

    tf.fit(X)
    expected_col_names = set(['DIVERSITY_SCORE(col_1)',
                              'DIVERSITY_SCORE(col_2)',
                              'LSA(col_1)[0]',
                              'LSA(col_1)[1]',
                              'LSA(col_2)[0]',
                              'LSA(col_2)[1]',
                              'MEAN_CHARACTERS_PER_WORD(col_1)',
                              'MEAN_CHARACTERS_PER_WORD(col_2)',
                              'POLARITY_SCORE(col_1)',
                              'POLARITY_SCORE(col_2)',
                              'col_3'])
    X_t = tf.transform(X)
    assert set(X_t.columns) == expected_col_names
    assert len(X_t.columns) == 11
    assert set(X_t.logical_types.values()) == {ww.logical_types.Double}


def test_featurizer_no_text():
    X = pd.DataFrame({'col_1': [1, 2, 3], 'col_2': [4, 5, 6]})
    tf = TextFeaturizer()
    tf.fit(X)
    X_t = tf.transform(X)
    assert len(X_t.columns) == 2


def test_some_missing_col_names(text_df, caplog):
    X = text_df
    tf = TextFeaturizer(text_columns=['col_1', 'col_2', 'col_3'])
    expected_col_names = set(['DIVERSITY_SCORE(col_1)',
                              'DIVERSITY_SCORE(col_2)',
                              'LSA(col_1)[0]',
                              'LSA(col_1)[1]',
                              'LSA(col_2)[0]',
                              'LSA(col_2)[1]',
                              'MEAN_CHARACTERS_PER_WORD(col_1)',
                              'MEAN_CHARACTERS_PER_WORD(col_2)',
                              'POLARITY_SCORE(col_1)',
                              'POLARITY_SCORE(col_2)'])
    tf.fit(X)
    X_t = tf.transform(X)
    assert set(X_t.columns) == expected_col_names
    assert len(X_t.columns) == 10
    assert set(X_t.logical_types.values()) == {ww.logical_types.Double}


def test_empty_text_column():
    X = pd.DataFrame({'col_1': []})
    X = infer_feature_types(X, {'col_1': 'NaturalLanguage'})
    tf = TextFeaturizer()
    with pytest.raises(ValueError, match="empty vocabulary; perhaps the documents only contain stop words"):
        tf.fit(X)


def test_invalid_text_column():
    # we assume this sort of data would fail to validate as text data up the stack
    # but just in case, make sure our component will convert non-str values to str
    X = pd.DataFrame(
        {'col_1': [
            'I\'m singing in the rain!$%^ do do do do do da do',
            'just singing in the rain.................. \n',
            325,
            np.nan,
            None,
            'I\'m happy again!!! lalalalalalalalalalala']})
    X = infer_feature_types(X, {'col_1': 'NaturalLanguage'})
    tf = TextFeaturizer()
    tf.fit(X)


def test_no_null_output():
    X = pd.DataFrame(
        {'col_1': ['I\'m singing in the rain! Just singing in the rain, what a glorious feeling, I\'m happy again!',
                   'In sleep he sang to me, in dreams he came... That voice which calls to me, and speaks my name.',
                   'I\'m gonna be the main event, like no king was before! I\'m brushing up on looking down, I\'m working on my ROAR!'],
         'col_2': ['do you hear the people sing? Singing the songs of angry men\n\tIt is the music of a people who will NOT be slaves again!',
                   'I dreamed a dream in days gone by, when hope was high and life worth living Red, the blood of angry men - black, the dark of ages past',
                   ':)']
         })
    tf = TextFeaturizer()
    tf.fit(X)
    X_t = tf.transform(X)
    assert not X_t.to_dataframe().isnull().any().any()


def test_index_col_names():
    X = np.array([['I\'m singing in the rain!$%^ do do do do do da do', 'do you hear the people sing?////////////////////////////////////'],
                  ['just singing in the rain.................. \n', 'singing the songs of angry men\n'],
                  ['\t\n\n\n\nWhat a glorious feelinggggggggggg, I\'m happy again!!! lalalalalalalalalalala', '\tIt is the music of a people who will NOT be slaves again!!!!!!!!!!!']])
    tf = TextFeaturizer()

    tf.fit(X)
    expected_col_names = set(['DIVERSITY_SCORE(0)',
                              'DIVERSITY_SCORE(1)',
                              'LSA(0)[0]',
                              'LSA(0)[1]',
                              'LSA(1)[0]',
                              'LSA(1)[1]',
                              'MEAN_CHARACTERS_PER_WORD(0)',
                              'MEAN_CHARACTERS_PER_WORD(1)',
                              'POLARITY_SCORE(0)',
                              'POLARITY_SCORE(1)'])
    X_t = tf.transform(X)
    assert set(X_t.columns) == expected_col_names
    assert len(X_t.columns) == 10
    assert set(X_t.logical_types.values()) == {ww.logical_types.Double}


def test_float_col_names():
    X = pd.DataFrame(
        {4.75: ['I\'m singing in the rain! Just singing in the rain, what a glorious feeling, I\'m happy again!',
                'In sleep he sang to me, in dreams he came... That voice which calls to me, and speaks my name.',
                'I\'m gonna be the main event, like no king was before! I\'m brushing up on looking down, I\'m working on my ROAR!'],
         -1: ['do you hear the people sing? Singing the songs of angry men\n\tIt is the music of a people who will NOT be slaves again!',
              'I dreamed a dream in days gone by, when hope was high and life worth living',
              'Red, the blood of angry men - black, the dark of ages past']
         })
    tf = TextFeaturizer()
    tf.fit(X)
    expected_col_names = set(['DIVERSITY_SCORE(4.75)',
                              'DIVERSITY_SCORE(-1.0)',
                              'LSA(4.75)[0]',
                              'LSA(4.75)[1]',
                              'LSA(-1.0)[0]',
                              'LSA(-1.0)[1]',
                              'MEAN_CHARACTERS_PER_WORD(4.75)',
                              'MEAN_CHARACTERS_PER_WORD(-1.0)',
                              'POLARITY_SCORE(4.75)',
                              'POLARITY_SCORE(-1.0)'])
    X_t = tf.transform(X)
    assert set(X_t.columns) == expected_col_names
    assert len(X_t.columns) == 10
    assert set(X_t.logical_types.values()) == {ww.logical_types.Double}


def test_output_null():
    X = pd.DataFrame(
        {'col_1': ['I\'m singing in the rain! Just singing in the rain, what a glorious feeling, I\'m happy again!',
                   'In sleep he sang to me, in dreams he came... That voice which calls to me, and speaks my name.',
                   'I\'m gonna be the main event, like no king was before! I\'m brushing up on looking down, I\'m working on my ROAR!'],
         'col_2': ['do you hear the people sing? Singing the songs of angry men\n\tIt is the music of a people who will NOT be slaves again!',
                   'I dreamed a dream in days gone by, when hope was high and life worth living Red, the blood of angry men - black, the dark of ages past',
                   ':)']
         })
    tf = TextFeaturizer()
    tf.fit(X)
    X_t = tf.transform(X)
    assert not X_t.to_dataframe().isnull().any().any()


def test_diversity_primitive_output():
    X = pd.DataFrame(
        {'diverse': ['This is a very diverse string which does not contain any repeated words at all',
                     'Here here each each word word is is repeated repeated exactly exactly twice twice',
                     'A sentence sentence with just a little overlap here and there there there']})
    tf = TextFeaturizer()
    tf.fit(X)

    expected_features = pd.Series([1.0, 0.5, 0.75], name='DIVERSITY_SCORE(diverse)')
    X_t = tf.transform(X)
    features = X_t['DIVERSITY_SCORE(diverse)'].to_series()
    assert_series_equal(expected_features, features)


def test_lsa_primitive_output():
    X = pd.DataFrame(
        {'lsa': ['do you hear the people sing? Singing the songs of angry men\n\tIt is the music of a people who will NOT be slaves again!',
                 'I dreamed a dream in days gone by, when hope was high and life worth living',
                 'Red, the blood of angry men - black, the dark of ages past']})
    tf = TextFeaturizer()
    tf.fit(X)

    expected_features = pd.DataFrame([[0.832, 0.],
                                      [0., 1.],
                                      [0.832, 0.]], columns=['LSA(lsa)[0]', 'LSA(lsa)[1]'])
    X_t = tf.transform(X)
    cols = [col for col in X_t.columns if 'LSA' in col]
    features = X_t[cols]
    assert_frame_equal(expected_features, features.to_dataframe(), atol=1e-3)


def test_mean_characters_primitive_output():
    X = pd.DataFrame(
        {'mean_characters': ['I\'m singing in the rain! Just singing in the rain, what a glorious feeling, I\'m happy again!',
                             'In sleep he sang to me, in dreams he came... That voice which calls to me, and speaks my name.',
                             'I\'m gonna be the main event, like no king was before! I\'m brushing up on looking down, I\'m working on my ROAR!']})
    tf = TextFeaturizer()
    tf.fit(X)

    expected_features = pd.Series([4.11764705882352, 3.45, 3.72727272727], name='MEAN_CHARACTERS_PER_WORD(mean_characters)')
    X_t = tf.transform(X)
    features = X_t['MEAN_CHARACTERS_PER_WORD(mean_characters)']
    assert_series_equal(expected_features, features.to_series())


def test_polarity_primitive_output():
    X = pd.DataFrame(
        {'polarity': ['This is neutral.',
                      'Everything is bad. Nothing is happy, he hates milk and can\'t stand gross foods, we are being very negative.',
                      'Everything is awesome! Everything is cool when you\'re part of a team! He loves milk and cookies!']})
    tf = TextFeaturizer()
    tf.fit(X)

    expected_features = pd.Series([0.0, -0.214, 0.602], name='POLARITY_SCORE(polarity)')
    X_t = tf.transform(X)
    features = X_t['POLARITY_SCORE(polarity)']
    assert_series_equal(expected_features, features.to_series())


def test_featurizer_with_custom_indices(text_df):
    X = text_df
    X = X.set_index(pd.Series([2, 5, 19]))
    tf = TextFeaturizer(text_columns=['col_1', 'col_2'])
    tf.fit(X)
    X_t = tf.transform(X)
    assert not X_t.to_dataframe().isnull().any().any()


@pytest.mark.parametrize("X_df", [pd.DataFrame(pd.Series([1, 2, 10], dtype="Int64")),
                                  pd.DataFrame(pd.Series([1., 2., 10.], dtype="float")),
                                  pd.DataFrame(pd.Series(['a', 'b', 'ab'], dtype="category")),
                                  pd.DataFrame(pd.Series([True, False, True], dtype="boolean")),
                                  pd.DataFrame(pd.Series(['this will be a natural language column because length', 'yay', 'hay'], dtype="string"))])
def test_text_featurizer_woodwork_custom_overrides_returned_by_components(X_df):
    X_df = X_df.copy()
    X_df['text col'] = pd.Series(['this will be a natural language column because length', 'yay', 'hay'], dtype="string")
    y = pd.Series([1, 2, 1])
    override_types = [Integer, Double, Categorical, Boolean]
    tf = TextFeaturizer()

    for logical_type in override_types:
        try:
            X = ww.DataTable(X_df, logical_types={0: logical_type})
        except TypeError:
            continue

        tf.fit(X)
        transformed = tf.transform(X, y)
        assert isinstance(transformed, ww.DataTable)
        assert transformed.logical_types == {0: logical_type, 'LSA(text col)[0]': Double,
                                             'LSA(text col)[1]': Double,
                                             'DIVERSITY_SCORE(text col)': Double,
                                             'MEAN_CHARACTERS_PER_WORD(text col)': Double,
                                             'POLARITY_SCORE(text col)': Double}
