"""Guards against the transponders<->sim circular import.

Transponder models import ``pm3py.sim`` primitives (Transponder/Reader/RFFrame/Medium), so
``pm3py.sim`` must NOT eagerly re-import transponder models at package-init time — its model
re-exports are lazy (see ``pm3py/sim/_models.py`` + the package ``__getattr__``), and ``fuzzer.py``
defers its ``iso14443a.base`` import. Each family must therefore import as a *fresh* first import.
These run in subprocesses because import-order bugs only show in a clean interpreter.
"""
import subprocess
import sys

import pytest

# each of these, imported first in a clean interpreter, used to trigger a circular import
_FRESH_IMPORTS = [
    "pm3py.transponders.hf.iso15693.type5",   # the reported failure
    "pm3py.transponders.hf.iso14443a.base",   # the fuzzer-side failure
    "pm3py.transponders.hf.iso14443b.base",
    "pm3py.transponders.lf.atmel.t5577",
    "pm3py.transponders.implants",
    "pm3py.sim.fuzzer",
    "pm3py.sim",
]


@pytest.mark.parametrize("module", _FRESH_IMPORTS)
def test_fresh_import_has_no_cycle(module):
    r = subprocess.run([sys.executable, "-c", f"import {module}"],
                       capture_output=True, text=True)
    assert r.returncode == 0, f"importing {module} first failed:\n{r.stderr}"


def test_sim_lazy_reexports_resolve():
    import pm3py.sim as sim
    from pm3py.transponders.hf.iso15693.type5 import NfcType5Tag

    assert sim.NfcType5Tag is NfcType5Tag                    # lazy re-export == canonical class
    assert "NfcType5Tag" in dir(sim)
    assert all(getattr(sim, n, None) is not None for n in sim.__all__)


def test_fuzzer_deferred_import_works():
    from pm3py.sim.fuzzer import GrammarFuzzer

    frame = GrammarFuzzer("14443a").generate("SELECT", uid=b"\x04\x11\x22\x33")
    assert frame.data.hex() == "93700411223304"             # CL1, NVB_SELECT, uid, bcc