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import unittest
import datetime

import numpy as np
import pandas as pd

from pyspark import pandas as ps
from pyspark.testing.pandasutils import PandasOnSparkTestCase, TestUtils


class ResampleSeriesMixin:
    @property
    def pdf1(self):
        np.random.seed(11)
        dates = [
            pd.NaT,
            datetime.datetime(2011, 12, 31),
            datetime.datetime(2011, 12, 31, 0, 0, 1),
            datetime.datetime(2011, 12, 31, 23, 59, 59),
            datetime.datetime(2012, 1, 1),
            datetime.datetime(2012, 1, 1, 0, 0, 1),
            pd.NaT,
            datetime.datetime(2012, 1, 1, 23, 59, 59),
            datetime.datetime(2012, 1, 2),
            pd.NaT,
            datetime.datetime(2012, 1, 30, 23, 59, 59),
            datetime.datetime(2012, 1, 31),
            datetime.datetime(2012, 1, 31, 0, 0, 1),
            datetime.datetime(2012, 3, 31),
            datetime.datetime(2013, 5, 3),
            datetime.datetime(2022, 5, 3),
        ]
        return pd.DataFrame(
            np.random.rand(len(dates), 2), index=pd.DatetimeIndex(dates), columns=list("AB")
        )

    @property
    def pdf2(self):
        np.random.seed(22)
        dates = [
            datetime.datetime(2022, 5, 1, 4, 5, 6),
            datetime.datetime(2022, 5, 3),
            datetime.datetime(2022, 5, 3, 23, 59, 59),
            datetime.datetime(2022, 5, 4),
            pd.NaT,
            datetime.datetime(2022, 5, 4, 0, 0, 1),
            datetime.datetime(2022, 5, 11),
        ]
        return pd.DataFrame(
            np.random.rand(len(dates), 2), index=pd.DatetimeIndex(dates), columns=list("AB")
        )

    @property
    def pdf3(self):
        np.random.seed(22)
        index = pd.date_range(start="2011-01-02", end="2022-05-01", freq="1D")
        return pd.DataFrame(np.random.rand(len(index), 2), index=index, columns=list("AB"))

    @property
    def pdf4(self):
        np.random.seed(33)
        index = pd.date_range(start="2020-12-12", end="2022-05-01", freq="1H")
        return pd.DataFrame(np.random.rand(len(index), 2), index=index, columns=list("AB"))

    @property
    def pdf5(self):
        np.random.seed(44)
        index = pd.date_range(start="2021-12-30 03:04:05", end="2022-01-02 06:07:08", freq="1T")
        return pd.DataFrame(np.random.rand(len(index), 2), index=index, columns=list("AB"))

    @property
    def pdf6(self):
        np.random.seed(55)
        index = pd.date_range(start="2022-05-02 03:04:05", end="2022-05-02 06:07:08", freq="1S")
        return pd.DataFrame(np.random.rand(len(index), 2), index=index, columns=list("AB"))

    @property
    def psdf1(self):
        return ps.from_pandas(self.pdf1)

    @property
    def psdf2(self):
        return ps.from_pandas(self.pdf2)

    @property
    def psdf3(self):
        return ps.from_pandas(self.pdf3)

    @property
    def psdf4(self):
        return ps.from_pandas(self.pdf4)

    @property
    def psdf5(self):
        return ps.from_pandas(self.pdf5)

    @property
    def psdf6(self):
        return ps.from_pandas(self.pdf6)

    def _test_resample(self, pobj, psobj, rules, closed, label, func):
        for rule in rules:
            p_resample = pobj.resample(rule=rule, closed=closed, label=label)
            ps_resample = psobj.resample(rule=rule, closed=closed, label=label)
            self.assert_eq(
                getattr(p_resample, func)().sort_index(),
                getattr(ps_resample, func)().sort_index(),
                almost=True,
            )

    def test_series_resample(self):
        self._test_resample(self.pdf2.A, self.psdf2.A, ["13M"], "right", "left", "max")
        self._test_resample(self.pdf3.A, self.psdf3.A, ["1001H"], "right", "right", "sum")
        self._test_resample(self.pdf4.A, self.psdf4.A, ["6D"], None, None, "mean")
        self._test_resample(self.pdf5.A, self.psdf5.A, ["47T"], "left", "left", "var")
        self._test_resample(self.pdf6.A, self.psdf6.A, ["111S"], "right", "right", "std")

        with self.assertRaisesRegex(ValueError, "rule code YE-DEC is not supported"):
            self._test_resample(self.pdf1.A, self.psdf1.A, ["4Y"], "right", None, "min")


class ResampleSeriesTests(ResampleSeriesMixin, PandasOnSparkTestCase, TestUtils):
    pass


if __name__ == "__main__":
    from pyspark.pandas.tests.resample.test_series import *  # noqa: F401

    try:
        import xmlrunner

        testRunner = xmlrunner.XMLTestRunner(output="target/test-reports", verbosity=2)
    except ImportError:
        testRunner = None
    unittest.main(testRunner=testRunner, verbosity=2)