"""End-to-end pipeline tests against opc.fake (IMPLEMENTATION_PLAN §9).

The fake client lets the event pipeline run without COM/hardware; Phase 1
grows this into the full scenario suite.
"""

import pytest

from opcda_diagnozer.opc.base import OpcError
from opcda_diagnozer.opc.fake import FakeOpcClient


def test_fake_reads_good_quality() -> None:
    client = FakeOpcClient()
    client.connect()
    results = client.read(["Channel1.Device1.Counter", "Channel1.Device1.Level"])
    assert [r.tag for r in results] == ["Channel1.Device1.Counter", "Channel1.Device1.Level"]
    assert all(r.quality_raw == 0xC0 for r in results)
    assert all(r.device_time is not None for r in results)


def test_fake_requires_connect_first() -> None:
    client = FakeOpcClient()
    with pytest.raises(OpcError):
        client.read(["Channel1.Device1.Counter"])


def test_fake_close_disconnects() -> None:
    client = FakeOpcClient()
    client.connect()
    client.close()
    with pytest.raises(OpcError):
        client.read(["Channel1.Device1.Counter"])