import pytest
from enum import Enum
from typing import List
from cpl.core.utils.cast import cast


class Color(Enum):
    RED = "red"
    GREEN = "green"


class Status(Enum):
    OK = 200
    ERROR = 500


def test_cast_none_returns_none():
    assert cast(None, int) is None


def test_cast_bool_true_values():
    assert cast("true", bool) is True
    assert cast("YES", bool) is True
    assert cast("1", bool) is True
    assert cast("On", bool) is True


def test_cast_bool_false_values():
    assert cast("false", bool) is False
    assert cast("0", bool) is False
    assert cast("no", bool) is False
    assert cast("off", bool) is False


def test_cast_list_of_str_with_brackets():
    assert cast("[a,b,c]", List[str]) == ["a", "b", "c"]


def test_cast_list_of_str_with_delimiter_no_brackets():
    assert cast("a,b,c", List[str]) == ["a", "b", "c"]


def test_cast_list_of_int_with_brackets():
    assert cast("[1,2,3]", List[int]) == [1, 2, 3]


def test_cast_list_custom_delimiter():
    assert cast("1;2;3", List[int], list_delimiter=";") == [1, 2, 3]


def test_cast_list_without_brackets_or_delimiter_errors():
    with pytest.raises(ValueError):
        cast("abc", List[str])


def test_cast_enum_by_value_case_insensitive():
    assert cast("red", Color) is Color.RED
    assert cast("RED", Color) is Color.RED
    assert cast("Green", Color) is Color.GREEN


def test_cast_enum_by_name_case_insensitive():
    assert cast("OK", Status) is Status.OK
    assert cast("ok", Status) is Status.OK
    assert cast("ERROR", Status) is Status.ERROR


def test_cast_enum_invalid_raises():
    with pytest.raises(ValueError) as e:
        cast("unknown", Color)
    assert "Cannot cast value 'unknown' to enum 'Color'" in str(e.value)


def test_cast_primitives():
    assert cast("42", int) == 42
    assert cast("3.14", float) == 3.14
    assert cast("abc", str) == "abc"


def test_cast_list_without_subtype_defaults_to_str():
    assert cast("a,b", list) == ["a", "b"]