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import random

import jax.random as jr
import pytest
import typeguard


try:
    import beartype
except ImportError:

    def skip(*args, **kwargs):
        pytest.skip("Beartype not installed")

    typecheck_params = [typeguard.typechecked, skip]
else:
    typecheck_params = [typeguard.typechecked, beartype.beartype]


@pytest.fixture(params=typecheck_params)
def typecheck(request):
    return request.param


@pytest.fixture(params=(False, True))
def jaxtyp(request):
    import jaxtyping

    if request.param:
        # New-style
        # @jaxtyping.jaxtyped(typechecker=typechecker)
        # def f(...)
        return lambda typechecker: jaxtyping.jaxtyped(typechecker=typechecker)
    else:
        # Old-style
        # @jaxtyping.jaxtyped
        # @typechecker
        # def f(...)
        def impl(typechecker):
            def decorator(fn):
                with pytest.warns(match="As of jaxtyping version 0.2.24"):
                    return jaxtyping.jaxtyped(typechecker(fn))

            return decorator

        return impl


@pytest.fixture()
def getkey():
    def _getkey():
        # Not sure what the maximum actually is but this will do
        return jr.PRNGKey(random.randint(0, 2**31 - 1))

    return _getkey


@pytest.fixture(scope="module")
def beartype_or_skip():
    yield pytest.importorskip("beartype")


@pytest.fixture(scope="module")
def typeguard_or_skip():
    yield pytest.importorskip("typeguard")