import copy
import dbus
import threading
import time
import uuid
from collections.abc import Callable
from dataclasses import dataclass
from enum import IntEnum

from openpilot.common.swaglog import cloudlog
from openpilot.system.ui.lib.networkmanager import *

try:
  from openpilot.common.params import Params
except ImportError:
  # Params/Cythonized modules are not available in zipapp
  Params = None

TETHERING_IP_ADDRESS = "192.168.43.1"
DEFAULT_TETHERING_PASSWORD = "swagswagcomma"


class SecurityType(IntEnum):
  OPEN = 0
  WPA = 1
  WPA2 = 2
  WPA3 = 3
  UNSUPPORTED = 4


def get_security_type(flags: int, wpa_flags: int, rsn_flags: int) -> SecurityType:
  wpa_props = wpa_flags | rsn_flags

  # obtained by looking at flags of networks in the office as reported by an Android phone
  supports_wpa = NM_802_11_AP_SEC_PAIR_WEP40 | NM_802_11_AP_SEC_PAIR_WEP104 | NM_802_11_AP_SEC_GROUP_WEP40 | NM_802_11_AP_SEC_GROUP_WEP104 | NM_802_11_AP_SEC_KEY_MGMT_PSK;

  if (flags == NM_802_11_AP_FLAGS_NONE) or ((flags & NM_802_11_AP_FLAGS_WPS) and not (wpa_props & supports_wpa)):
    return SecurityType.OPEN
  elif (flags & NM_802_11_AP_FLAGS_PRIVACY) and (wpa_props & supports_wpa) and not (wpa_props & NM_802_11_AP_SEC_KEY_MGMT_802_1X):
    return SecurityType.WPA
  else:
    cloudlog.warning(f"Unsupported network! flags: {flags}, wpa_flags: {wpa_flags}, rsn_flags: {rsn_flags}")
    return SecurityType.UNSUPPORTED


@dataclass(frozen=True)
class Network:
  ssid: str
  strength: int
  is_connected: bool
  security_type: SecurityType
  is_saved: bool = False  # TODO

  @classmethod
  def from_dbus(cls, ssid: str, aps: list["AccessPoint"], active_ap_path: dbus.ObjectPath) -> "Network":
    # we only want to show the strongest AP for each Network/SSID
    strongest_ap = max(aps, key=lambda ap: ap.strength)

    is_connected = any(ap.ap_path == active_ap_path for ap in aps)  # TODO: just any is_connected aps!
    security_type = get_security_type(strongest_ap.flags, strongest_ap.wpa_flags, strongest_ap.rsn_flags)

    return cls(
      ssid=ssid,
      strength=strongest_ap.strength,
      is_connected=is_connected,
      security_type=security_type,
      is_saved=True,  # TODO
    )


@dataclass(frozen=True)
class AccessPoint:
  ssid: str
  bssid: str
  strength: int
  is_connected: bool
  flags: int
  wpa_flags: int
  rsn_flags: int
  ap_path: dbus.ObjectPath

  @classmethod
  def from_dbus(cls, ap_props: dbus.Interface, ap_path: dbus.ObjectPath, active_ap_path: dbus.ObjectPath) -> "AccessPoint":
    ssid = bytes(ap_props.Get(NM_ACCESS_POINT_IFACE, "Ssid")).decode("utf-8", "replace")
    bssid = str(ap_props.Get(NM_ACCESS_POINT_IFACE, "HwAddress"))
    strength = int(ap_props.Get(NM_ACCESS_POINT_IFACE, "Strength"))
    flags = int(ap_props.Get(NM_ACCESS_POINT_IFACE, "Flags"))
    wpa_flags = int(ap_props.Get(NM_ACCESS_POINT_IFACE, "WpaFlags"))
    rsn_flags = int(ap_props.Get(NM_ACCESS_POINT_IFACE, "RsnFlags"))

    return cls(
      ssid=ssid,
      bssid=bssid,
      strength=strength,
      is_connected=ap_path == active_ap_path,
      flags=flags,
      wpa_flags=wpa_flags,
      rsn_flags=rsn_flags,
      ap_path=ap_path,
    )


class WifiManager:
  def __init__(self):
    self._networks = []  # a network can be comprised of multiple APs
    self._active = True  # used to not run this cycle when not in settings
    self._running = True

    # DBus and NetworkManager setup
    self._bus = dbus.SystemBus()
    self._nm = dbus.Interface(self._bus.get_object(NM, NM_PATH), NM_IFACE)
    self._props = dbus.Interface(self._bus.get_object(NM, NM_PATH), NM_PROPERTIES_IFACE)

    # Callbacks
    self._networks_updated: Callable[[list[Network]], None] | None = None
    self._connection_failed: Callable[[str, str], None] | None = None

    self._thread = threading.Thread(target=self._run, daemon=True)
    self._thread.start()

  def set_callbacks(self, networks_updated: Callable[[list[Network]], None],
                    connection_failed: Callable[[str, str], None]):
    self._networks_updated = networks_updated
    self._connection_failed = connection_failed

  def stop(self):
    self._running = False
    self._thread.join()

  def _run(self):
    while True:
      if self._active:
        self._update_networks()

      if not self._running:
        break

      time.sleep(1)

  def set_active(self, active: bool):
    self._active = active

  def _get_wifi_device(self) -> dbus.ObjectPath | None:
    # TODO: cache if slow
    t = time.monotonic()
    device_paths = self._nm.GetDevices()
    # print(f'DEVICE PATHS: {device_paths}')

    wifi_device = None
    for device_path in device_paths:
      dev_props = dbus.Interface(self._bus.get_object(NM, device_path), NM_PROPERTIES_IFACE)
      dev_type = dev_props.Get(NM_DEVICE_IFACE, "DeviceType")

      if dev_type == NM_DEVICE_TYPE_WIFI:
        wifi_device = device_path
        break

    # print(f"Got wifi device in {time.monotonic() - t}s: {wifi_device}")
    return wifi_device

  def connect_to_network(self, ssid: str, password: str | None):
    t = time.monotonic()

    # Clear all connections that may already exist to the network we are connecting
    self.forget_connection(ssid)

    is_hidden = False

    connection = {
      'connection': {
        'type': '802-11-wireless',
        'uuid': str(uuid.uuid4()),
        'id': f'openpilot connection {ssid}',
        'autoconnect-retries': 0,
      },
      '802-11-wireless': {
        'ssid': dbus.ByteArray(ssid.encode("utf-8")),
        'hidden': is_hidden,
        'mode': 'infrastructure',
      },
      'ipv4': {
        'method': 'auto',
        'dns-priority': 600,
      },
      'ipv6': {'method': 'ignore'},
    }

    if password is not None:
      connection['802-11-wireless-security'] = {
        'key-mgmt': 'wpa-psk',
        'auth-alg': 'open',
        'psk': password,
      }

    settings = dbus.Interface(
      self._bus.get_object(NM, NM_SETTINGS_PATH),
      NM_SETTINGS_IFACE
    )

    conn_path = settings.AddConnection(connection)

    print('Added connection', conn_path)

    print(f'Connecting to network took {time.monotonic() - t}s')

  def _get_connections(self) -> list[dbus.ObjectPath]:
    settings_iface = dbus.Interface(self._bus.get_object(NM, NM_SETTINGS_PATH), NM_SETTINGS_IFACE)
    return settings_iface.ListConnections()

  def forget_connection(self, ssid: str):
    for conn_path in self._get_connections():
      conn_props = dbus.Interface(self._bus.get_object(NM, conn_path), NM_CONNECTION_IFACE)
      settings = conn_props.GetSettings()
      if "802-11-wireless" in settings and bytes(settings["802-11-wireless"]["ssid"]).decode("utf-8", "replace") == ssid:
        conn_iface = dbus.Interface(self._bus.get_object(NM, conn_path), NM_CONNECTION_IFACE)
        conn_iface.Delete()
        print('deleted', ssid)
        break

  def _update_networks(self):
    # TODO: only run this function on scan complete!
    print('UPDATING NETWORKS!!!!')

    device_path = self._get_wifi_device()
    if device_path is None:
      cloudlog.warning("No WiFi device found")
      return

    wifi_iface = dbus.Interface(self._bus.get_object(NM, device_path), NM_WIRELESS_IFACE)
    dev_props = dbus.Interface(self._bus.get_object(NM, device_path), NM_PROPERTIES_IFACE)
    active_ap_path = dev_props.Get(NM_WIRELESS_IFACE, "ActiveAccessPoint")

    aps: dict[str, list[AccessPoint]] = {}

    for ap_path in wifi_iface.GetAllAccessPoints():
      ap_props = dbus.Interface(self._bus.get_object(NM, ap_path), NM_PROPERTIES_IFACE)

      ap = AccessPoint.from_dbus(ap_props, ap_path, active_ap_path)
      if ap.ssid not in aps:
        aps[ap.ssid] = []

      aps[ap.ssid].append(ap)

    self._networks = [Network.from_dbus(ssid, ap_list, active_ap_path) for ssid, ap_list in aps.items()]
    if self._networks_updated is not None:
      self._networks_updated(self._networks)

  def get_networks(self):
    return self._networks