import asyncio
from typing import Dict, Any
from sdbus_async.networkmanager import (
    NetworkManager,
    NetworkManagerSettings,
    NetworkConnectionSettings,
    NetworkDeviceGeneric,
)
import sdbus
from sdbus_async.networkmanager.settings import ConnectionProfile
from services.arp_service import NetworkScanner


class IPService:
    """
    Сервис проверки доступности IP-адреса и применения настроек сети
    """

    def __init__(self):
        self.arp_scanner = NetworkScanner()
        self.bus = sdbus.sd_bus_open_system()
        sdbus.set_default_bus(self.bus)

    def _reset_bus(self):
        """Перезапускает соединение с системной шиной D-Bus"""
        new_bus = sdbus.sd_bus_open_system()
        sdbus.set_default_bus(new_bus)
        if hasattr(self, "bus") and self.bus is not None:
            self.bus = None
        self.bus = new_bus

    async def check_ip_config(self, args: Dict[str, Any]) -> Dict[str, Any]:
        """Проверяет доступность IP-адреса перед его применением"""
        self._reset_bus()
        clients = self.arp_scanner.scan_network()
        new_ip = args["ipv4_updates"]["ipv4.address-data"][0]["address"]
        if any(client["ip"] == new_ip for client in clients):
            return {
                "available": False,
                "message": f"IP address {new_ip} уже занят."
            }
        return {
            "available": True,
            "message": "Network profile settings are available for use.",
        }

    async def apply_ip_config(self, args: Dict[str, Any]) -> None:
        """Применяет проверенные настройки IP"""
        self._reset_bus()
        nm = NetworkManager()
        settings = NetworkManagerSettings()
        connection_paths = await settings.get_connections_by_id(
            args["connection_id"])

        if not connection_paths:
            raise ValueError(f"Подключение {args['connection_id']} не найдено")

        connection = NetworkConnectionSettings(connection_paths[0])
        profile = await connection.get_profile()
        settings_dict = profile.to_settings_dict()

        for key_path, value in args["ipv4_updates"].items():
            section, *props = key_path.split(".")
            current = settings_dict[section]
            for prop in props[:-1]:
                current = current.setdefault(prop, {})
            current[props[-1]] = value

        new_profile = ConnectionProfile.from_settings_dict(settings_dict)
        await connection.update(new_profile.to_dbus())
        print(f"Обновлены настройки для {args['connection_id']}:")

        interface_name = settings_dict["connection"]["interface-name"]
        devices = await nm.get_devices()
        for device_path in devices:
            device = NetworkDeviceGeneric(device_path)
            if await device.interface == interface_name:
                await device.disconnect()
                print(f"Отключён от {interface_name}")
                await nm.activate_connection(connection=connection_paths[0],
                                             device=device_path)
                print(f"Переподключён к {args['connection_id']}")
                return

        raise RuntimeError(
            f"Устройство для интерфейса {interface_name} не найдено")