import itertools as it

import numpy as np
import pytest

from hstrat.hstrat import geom_seq_nth_root_tapered_algo


@pytest.mark.filterwarnings(
    "ignore:Interspersal set to 1, no bound on MRCA rank estimate uncertainty can be guaranteed."
)
@pytest.mark.parametrize(
    "degree",
    [
        pytest.param(1, marks=pytest.mark.heavy_3a),
        2,
        3,
        7,
        9,
        pytest.param(42, marks=pytest.mark.heavy_2a),
        pytest.param(97, marks=pytest.mark.heavy_2a),
        pytest.param(100, marks=pytest.mark.heavy_2a),
    ],
)
@pytest.mark.parametrize(
    "interspersal",
    [
        pytest.param(1, marks=pytest.mark.heavy_3b),
        2,
        5,
    ],
)
@pytest.mark.parametrize(
    "time_sequence",
    [
        pytest.param(
            it.chain(
                range(10**3),
                np.logspace(10, 32, num=50, base=2, dtype="int"),
            ),
            marks=pytest.mark.heavy_3c,
        ),
        (i for i in range(10) for __ in range(2)),
        (10 - i for i in range(10) for __ in range(2)),
        np.random.default_rng(1).integers(
            low=0,
            high=10**2,
            size=10,
        ),
        pytest.param(
            np.random.default_rng(1).integers(
                low=0,
                high=2**16,
                size=10,
            ),
            marks=pytest.mark.heavy_2b,
        ),
    ],
)
def test_policy_consistency(degree, interspersal, time_sequence):
    policy = geom_seq_nth_root_tapered_algo.Policy(degree, interspersal)
    spec = policy.GetSpec()
    instance = geom_seq_nth_root_tapered_algo.CalcNumStrataRetainedUpperBound(
        spec
    )
    for num_strata_deposited in time_sequence:
        policy_requirement = policy.CalcNumStrataRetainedExact(
            num_strata_deposited,
        )
        for which in (
            instance,
            geom_seq_nth_root_tapered_algo.CalcNumStrataRetainedUpperBound(
                spec
            ),
        ):
            assert (
                which(
                    policy,
                    num_strata_deposited,
                )
                >= policy_requirement
            )


@pytest.mark.filterwarnings(
    "ignore:Interspersal set to 1, no bound on MRCA rank estimate uncertainty can be guaranteed."
)
@pytest.mark.parametrize(
    "degree",
    [
        1,
        2,
        3,
        7,
        9,
        42,
        97,
        100,
    ],
)
@pytest.mark.parametrize(
    "interspersal",
    [
        1,
        2,
        5,
    ],
)
def test_eq(degree, interspersal):
    policy = geom_seq_nth_root_tapered_algo.Policy(degree, interspersal)
    spec = policy.GetSpec()
    instance = geom_seq_nth_root_tapered_algo.CalcNumStrataRetainedUpperBound(
        spec
    )

    assert instance == instance
    assert (
        instance
        == geom_seq_nth_root_tapered_algo.CalcNumStrataRetainedUpperBound(
            spec,
        )
    )
    assert instance is not None
