# imports
import pytest  # used for our unit tests
from sentry_sdk.integrations.stdlib import _init_argument

# unit tests

def test_basic_retrieval_from_kwargs():
    # Argument is present in kwargs
    args = []
    kwargs = {'name': 'value'}
    assert _init_argument(args, kwargs, 'name', 0) == 'value'

def test_basic_retrieval_from_args():
    # Argument is present in args at the specified position
    args = ['value']
    kwargs = {}
    assert _init_argument(args, kwargs, 'name', 0) == 'value'

def test_setdefault_callback_modifies_value():
    # setdefault_callback modifies the retrieved value
    args = []
    kwargs = {'name': 'value'}
    assert _init_argument(args, kwargs, 'name', 0, lambda x: x.upper()) == 'VALUE'

def test_setdefault_callback_sets_default_value():
    # setdefault_callback sets a default value when the argument is not found
    args = []
    kwargs = {}
    assert _init_argument(args, kwargs, 'name', 0, lambda x: 'default') == 'default'

def test_name_empty_string():
    # name is an empty string
    args = []
    kwargs = {'': 'value'}
    assert _init_argument(args, kwargs, '', 0) == 'value'

def test_position_out_of_bounds():
    # position is out of bounds of args
    args = ['value']
    kwargs = {}
    assert _init_argument(args, kwargs, 'name', 2) is None

def test_both_args_and_kwargs_empty():
    # Both args and kwargs are empty
    args = []
    kwargs = {}
    assert _init_argument(args, kwargs, 'name', 0) is None

def test_argument_in_both_args_and_kwargs():
    # Argument is present in both args and kwargs
    args = ['value1']
    kwargs = {'name': 'value2'}
    assert _init_argument(args, kwargs, 'name', 0) == 'value2'

def test_setdefault_callback_returns_none():
    # setdefault_callback returns None
    args = []
    kwargs = {'name': 'value'}
    assert _init_argument(args, kwargs, 'name', 0, lambda x: None) is None

def test_setdefault_callback_raises_exception():
    # setdefault_callback raises an exception
    args = []
    kwargs = {'name': 'value'}
    with pytest.raises(ZeroDivisionError):
        _init_argument(args, kwargs, 'name', 0, lambda x: 1/0)

def test_large_number_of_args_and_kwargs():
    # Large number of args and kwargs
    args = [i for i in range(1000)]
    kwargs = {f'key{i}': i for i in range(1000)}
    assert _init_argument(args, kwargs, 'key999', 999) == 999

def test_deterministic_behavior():
    # Ensure the function returns the same result for the same inputs
    args = ['value']
    kwargs = {'name': 'value'}
    assert _init_argument(args, kwargs, 'name', 0, lambda x: x.upper()) == 'VALUE'

def test_non_string_keys_in_kwargs():
    # kwargs contains non-string keys
    args = []
    kwargs = {123: 'value'}
    assert _init_argument(args, kwargs, 123, 0) == 'value'

def test_nested_data_structures():
    # args or kwargs contain nested data structures
    args = [[1, 2, 3]]
    kwargs = {}
    assert _init_argument(args, kwargs, 'name', 0) == [1, 2, 3]

def test_empty_string_and_zero_values():
    # name is an empty string and position is zero
    args = ['value']
    kwargs = {'': 'value'}
    assert _init_argument(args, kwargs, '', 0) == 'value'

def test_callback_alters_input_arguments():
    # setdefault_callback modifies the input arguments directly
    args = ['value']
    kwargs = {}
    def callback(x):
        args.append('new_value')
        return x
    _init_argument(args, kwargs, 'name', 0, callback)
    assert 'new_value' in args

def test_callback_returns_unexpected_types():
    # setdefault_callback returns a different type than expected
    args = ['value']
    kwargs = {}
    assert _init_argument(args, kwargs, 'name', 0, lambda x: 123) == 123

def test_recursive_callback():
    # setdefault_callback calls _init_argument recursively
    args = []
    kwargs = {'name': 'value'}
    def callback(x):
        return _init_argument(args, kwargs, 'name', 0)
    assert _init_argument(args, kwargs, 'name', 0, callback) == 'value'