"""Discovery tests (opc/discovery.py).

Pure tests run on any OS; the registry/COM scans are Windows-only and skip
elsewhere (IMPLEMENTATION_PLAN §9: COM adapters are import-guarded).
"""

import sys

import pytest

from opcda_diagnozer.opc.base import OpcError
from opcda_diagnozer.opc.discovery import (
    DA_CATEGORIES,
    ServerInfo,
    list_servers,
    normalize_string_array,
)


@pytest.mark.parametrize(
    ("raw", "expected"),
    [
        (None, []),
        ("", []),
        ("One.Server.1", ["One.Server.1"]),
        (("A.Sim.1", "A.Sim.2"), ["A.Sim.1", "A.Sim.2"]),
        (("A.Sim.1", " A.Sim.1 ", "A.Sim.2"), ["A.Sim.1", "A.Sim.2"]),  # dedupe + trim
        ((1, None, "A.Sim.1"), ["A.Sim.1"]),  # non-strings dropped
        ([], []),
    ],
)
def test_normalize_string_array(raw: object, expected: list[str]) -> None:
    assert normalize_string_array(raw) == expected


def test_registry_source_rejects_remote_host() -> None:
    with pytest.raises(OpcError, match="local"):
        list_servers(host="REMOTE-HOST", source="registry")


def test_unknown_source_rejected() -> None:
    with pytest.raises(ValueError, match="unknown source"):
        list_servers(source="nonsense")  # type: ignore[arg-type]


@pytest.mark.skipif(sys.platform != "win32", reason="winreg scan is Windows-only")
def test_registry_scan_local_structural() -> None:
    servers = list_servers(source="registry")
    assert isinstance(servers, list)
    for server in servers:
        assert server.source == "registry"
        assert server.prog_id  # non-empty ProgID (or CLSID fallback)
        assert server.clsid is not None
        assert server.clsid.startswith("{") and server.clsid.endswith("}")
        assert set(server.da_versions) <= set(DA_CATEGORIES.values())
    assert [s.prog_id.lower() for s in servers] == sorted(s.prog_id.lower() for s in servers)


@pytest.mark.skipif(sys.platform != "win32", reason="COM enumeration needs Windows + pywin32")
def test_automation_enumeration_smoke() -> None:
    """Live smoke test — requires a registered Automation Wrapper (dev box)."""
    try:
        servers = list_servers(source="automation")
    except OpcError as exc:
        pytest.skip(f"Automation Wrapper not usable on this machine: {exc}")
    assert all(s.source == "automation" and s.prog_id for s in servers)