import pytest
from typing import List
from cpl.core.utils.get_value import get_value


def test_get_existing_str():
    assert get_value({"key": "hello"}, "key", str) == "hello"


def test_get_existing_int_already_typed():
    # Value already has the correct type -> returned directly
    assert get_value({"count": 42}, "count", int) == 42


def test_get_existing_float_already_typed():
    # Value already has the correct type -> returned directly
    assert get_value({"pi": 3.14}, "pi", float) == 3.14


# NOTE: get_value calls cast() internally but does NOT return the cast result
# (the return value is lost). String "42" -> int returns None instead of 42.
# This is a known bug in get_value.
def test_get_str_to_int_returns_none_bug():
    result = get_value({"count": "42"}, "count", int)
    assert result is None  # Bug: should be 42


def test_get_missing_key_returns_none():
    assert get_value({}, "missing", str) is None


def test_get_missing_key_returns_default():
    assert get_value({}, "missing", str, "fallback") == "fallback"


def test_get_value_already_correct_type():
    assert get_value({"x": 5}, "x", int) == 5


def test_get_list_already_correct_type():
    result = get_value({"items": [1, 2, 3]}, "items", List[int])
    assert result == [1, 2, 3]


def test_get_list_of_str_already_correct_type():
    result = get_value({"tags": ["a", "b"]}, "tags", List[str])
    assert result == ["a", "b"]


def test_get_bool_already_typed():
    # Value is already bool -> returned directly
    assert get_value({"flag": True}, "flag", bool) is True
    assert get_value({"flag": False}, "flag", bool) is False


# NOTE: Same bug – string "true" -> bool returns None
def test_get_bool_from_str_returns_none_bug():
    result = get_value({"flag": "true"}, "flag", bool)
    assert result is None  # Bug: should be True


def test_cast_failure_returns_default():
    result = get_value({"val": "not_a_number"}, "val", int, -1)
    assert result == -1