"""Низкоуровневые проверки C-API: очередь событий, счётчики, ошибки входа."""
from __future__ import annotations

from pyfglair._cffi import ffi, lib


def _make_session():
    cfg = ffi.new("fgl_config_t*")
    cfg.host = ffi.new("char[]", b"127.0.0.1")
    cfg.device_port = 9
    cfg.dsn = ffi.new("char[]", b"AC000W00MOCK0001")
    cfg.lanip_key = ffi.new("char[]", b"key")
    cfg.lanip_key_id = 1
    cfg.tmpl = 0
    cfg.listen_port = 0
    cfg.keepalive_ms = 1000
    cfg.max_queue = 40
    session = lib.fgl_session_create(cfg, ffi.NULL)
    assert session != ffi.NULL
    return session


def test_poll_wait_empty():
    session = _make_session()
    try:
        out = ffi.new("fgl_event_t[]", 4)
        assert lib.fgl_session_poll_events(session, out, 4) == 0
        assert lib.fgl_session_wait_events(session, out, 4, 0) == 0
        assert lib.fgl_session_events_dropped(session) == 0
    finally:
        lib.fgl_session_destroy(session)


def test_poll_invalid_args():
    session = _make_session()
    try:
        out = ffi.new("fgl_event_t[]", 4)
        assert lib.fgl_session_poll_events(session, ffi.NULL, 4) == 0
        assert lib.fgl_session_poll_events(session, out, 0) == 0
        assert lib.fgl_session_wait_events(session, out, 0, 0) == 0
        assert lib.fgl_session_poll_events(ffi.NULL, out, 4) == 0
        assert lib.fgl_session_events_dropped(ffi.NULL) == 0
    finally:
        lib.fgl_session_destroy(session)


def test_create_null_config():
    assert lib.fgl_session_create(ffi.NULL, ffi.NULL) == ffi.NULL


def test_log_poll_empty():
    out = ffi.new("fgl_log_event_t[]", 4)
    assert lib.fgl_log_poll_events(out, 4) >= 0
    assert lib.fgl_log_wait_events(out, 4, 0) >= 0
    assert lib.fgl_log_events_dropped() >= 0