"""Read local Windows IPv4 interfaces without sending device discovery packets."""

from __future__ import annotations

import importlib.util
import json
from pathlib import Path
import sys


def discovery_helper():
    path = Path(__file__).resolve().parent / "skill" / "scripts" / "vendor" / "v2_discover.py"
    name = "artemis_device_test_network_discovery"
    spec = importlib.util.spec_from_file_location(name, path)
    module = importlib.util.module_from_spec(spec)
    sys.modules[name] = module
    spec.loader.exec_module(module)
    return module


def inventory() -> dict:
    helper = discovery_helper()
    interfaces = []
    eligible = []
    for interface in helper.powershell_interfaces():
        network = interface.network
        reason = helper.exclusion_reason(interface, include_virtual=False)
        if not reason and (
            network.prefixlen > 30
            or interface.address in {network.network_address, network.broadcast_address}
        ):
            reason = "没有可用的 IPv4 广播主机地址"
        cidr = f"{interface.address}/{interface.prefix_length}"
        interfaces.append(
            {
                "alias": interface.alias,
                "description": interface.description,
                "ipv4_interface": cidr,
                "network": str(network),
                "broadcast": str(network.broadcast_address),
                "hardware": interface.hardware,
                "eligible": reason is None,
                "exclusion_reason": reason,
            }
        )
        if reason is None and cidr not in eligible:
            eligible.append(cidr)
    return {
        "status": "INTERFACES_ENUMERATED",
        "interfaces": interfaces,
        "eligible_interfaces": eligible,
        "device_discovery_executed": False,
    }


def main() -> int:
    for stream in (sys.stdout, sys.stderr):
        if hasattr(stream, "reconfigure"):
            stream.reconfigure(encoding="utf-8", errors="backslashreplace")
    try:
        result = inventory()
    except (OSError, RuntimeError, ValueError, TypeError):
        print(
            json.dumps(
                {
                    "execution_status": "configuration_error",
                    "error_code": "network_interface_query_failed",
                    "message": "本机 IPv4 网卡枚举失败；未执行设备发现，请检查 Windows 网络查询权限。",
                    "device_discovery_executed": False,
                },
                ensure_ascii=False,
            )
        )
        return 2
    print(json.dumps(result, ensure_ascii=False))
    return 0


if __name__ == "__main__":
    raise SystemExit(main())