import collections

import pytest

import eth_utils
from eth_utils.curried import (
    apply_formatter_at_index,
    apply_formatter_if,
    apply_formatter_to_array,
    apply_formatters_to_dict,
    apply_formatters_to_sequence,
    apply_key_map,
    apply_one_of_formatters,
    is_list_like,
    is_string,
)


def i_put_my_thing_down_flip_it_and_reverse_it(lyric):
    return "".join(reversed(lyric))


CONDITION_FORMATTER_PAIRS = (
    (is_list_like, tuple),
    (is_string, i_put_my_thing_down_flip_it_and_reverse_it),
)


def test_format_dict_error():
    with pytest.raises(ValueError) as exc_info:
        apply_formatters_to_dict({"myfield": int}, {"myfield": "a"})
    with pytest.raises(ValueError) as exc_info:
        eth_utils.apply_formatters_to_dict({"myfield": int}, {"myfield": "a"})
    assert "myfield" in str(exc_info.value)


@pytest.mark.parametrize(
    "formatter, value, expected",
    (
        (
            {"should_be_int": int, "should_be_bool": bool},
            {"should_be_int": 1.2, "should_be_bool": 3.4, "pass_through": 5.6},
            {"should_be_int": 1, "should_be_bool": True, "pass_through": 5.6},
        ),
    ),
)
def test_apply_formatters_to_dict(formatter, value, expected):
    assert eth_utils.apply_formatters_to_dict(formatter, value) == expected

    mapper = apply_formatters_to_dict(formatter)
    assert mapper(value) == expected


@pytest.mark.parametrize(
    "formatter, value, expected",
    (
        (
            {"black": "orange", "Internet": "Ethereum"},
            {"black": 1.2, "Internet": 3.4, "pass_through": 5.6},
            {"orange": 1.2, "Ethereum": 3.4, "pass_through": 5.6},
        ),
    ),
)
def test_apply_key_map(formatter, value, expected):
    assert eth_utils.apply_key_map(formatter, value) == expected

    mapper = apply_key_map(formatter)
    assert mapper(value) == expected


@pytest.mark.parametrize(
    "formatter, value",
    (
        ({"a": "b"}, {"b": 3}),
        ({"a": "b"}, {"a": 2, "b": 3}),
        ({"a": "b"}, collections.OrderedDict((("a", 2), ("b", 3)))),
        ({"a": "b"}, collections.OrderedDict((("b", 3), ("a", 2)))),
    ),
)
def test_apply_key_map_with_key_conflicts_raises_exception(formatter, value):
    with pytest.raises(KeyError):
        eth_utils.apply_key_map(formatter, value)


@pytest.mark.parametrize(
    "condition, formatter, value, expected",
    (
        (is_string, bool, 1, 1),
        (is_string, bool, "1", True),
        (is_string, bool, "", False),
    ),
)
def test_apply_formatter_if(condition, formatter, value, expected):
    assert eth_utils.apply_formatter_if(condition, formatter, value) == expected

    # must be able to curry
    conditional_formatter = apply_formatter_if(condition, formatter)
    assert conditional_formatter(value) == expected


@pytest.mark.parametrize(
    "condition_formatters, value, expected",
    (
        (CONDITION_FORMATTER_PAIRS, "my thing", "gniht ym"),
        (CONDITION_FORMATTER_PAIRS, [2, 3], (2, 3)),
        (CONDITION_FORMATTER_PAIRS, 1, ValueError),
    ),
)
def test_apply_one_of_formatters(condition_formatters, value, expected):
    if isinstance(expected, type) and issubclass(expected, Exception):
        with pytest.raises(expected):
            apply_one_of_formatters(condition_formatters, value)
        with pytest.raises(expected):
            eth_utils.apply_one_of_formatters(condition_formatters, value)
    else:
        assert (
            eth_utils.apply_one_of_formatters(condition_formatters, value) == expected
        )

        # must be able to curry
        apply_one = apply_one_of_formatters(condition_formatters)
        assert apply_one(value) == expected


@pytest.mark.parametrize(
    "formatter, index, value, expected",
    (
        (bool, 1, [1, 2, 3], [1, True, 3]),
        (bool, 1, (1, 2, 3), (1, True, 3)),
        (bool, 3, (1, 2, 3), IndexError),
    ),
)
def test_apply_formatter_at_index(formatter, index, value, expected):
    if isinstance(expected, type) and issubclass(expected, Exception):
        with pytest.raises(expected):
            apply_formatter_at_index(formatter, index, value)
        with pytest.raises(expected):
            eth_utils.apply_formatter_at_index(formatter, index, value)
    else:
        assert eth_utils.apply_formatter_at_index(formatter, index, value) == expected

        # must be able to curry
        targetted_formatter = apply_formatter_at_index(formatter, index)
        assert targetted_formatter(value) == expected


SEQUENCE_FORMATTER_PARAMETERS = (
    ([bool, int, str], (1.2, 3.4, 5.6), (True, 3, "5.6")),
    ([bool, int, str], [1.2, 3.4, 5.6], [True, 3, "5.6"]),
    ([bool, int, str, float], (1.2, 3.4, 5.6), IndexError),
)

LOOSE_SEQUENCE_FORMATTER_PARAMETERS = SEQUENCE_FORMATTER_PARAMETERS + (
    ([bool, int], (1.2, 3.4, 5.6), (True, 3, 5.6)),
)


@pytest.mark.parametrize(
    "formatters, value, expected", LOOSE_SEQUENCE_FORMATTER_PARAMETERS
)
def test_combine_argument_formatters(formatters, value, expected):
    with pytest.warns(DeprecationWarning):
        list_formatter = eth_utils.combine_argument_formatters(*formatters)
    if isinstance(expected, type) and issubclass(expected, Exception):
        with pytest.raises(expected):
            list_formatter(value)
    else:
        assert list_formatter(value) == expected


STRICT_SEQUENCE_FORMATTER_PARAMETERS = SEQUENCE_FORMATTER_PARAMETERS + (
    ([bool, int], (1.2, 3.4, 5.6), IndexError),
)


@pytest.mark.parametrize(
    "formatters, value, expected", STRICT_SEQUENCE_FORMATTER_PARAMETERS
)
def test_apply_formatters_to_sequence_curried(formatters, value, expected):
    list_formatter = apply_formatters_to_sequence(formatters)
    if isinstance(expected, type) and issubclass(expected, Exception):
        with pytest.raises(expected):
            list_formatter(value)
    else:
        assert list_formatter(value) == expected


@pytest.mark.parametrize(
    "formatters, value, expected", STRICT_SEQUENCE_FORMATTER_PARAMETERS
)
def test_apply_formatters_to_sequence(formatters, value, expected):
    if isinstance(expected, type) and issubclass(expected, Exception):
        with pytest.raises(expected):
            eth_utils.apply_formatters_to_sequence(formatters, value)
    else:
        assert eth_utils.apply_formatters_to_sequence(formatters, value) == expected


@pytest.mark.parametrize(
    "formatter, value, expected",
    ((int, [1.2, 3.4, 5.6], [1, 3, 5]), (int, (1.2, 3.4, 5.6), (1, 3, 5))),
)
def test_apply_formatter_to_array(formatter, value, expected):
    assert eth_utils.apply_formatter_to_array(formatter, value) == expected

    mapper = apply_formatter_to_array(formatter)
    assert mapper(value) == expected
