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


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

    return cls(
      ssid=ssid,
      strength=strongest_ap.strength,
      is_connected=is_connected,
      security_type=SecurityType.UNSUPPORTED,  # TODO
      is_saved=False,  # 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("org.freedesktop.NetworkManager.AccessPoint", "Ssid")).decode("utf-8", "replace")
    bssid = str(ap_props.Get("org.freedesktop.NetworkManager.AccessPoint", "HwAddress"))
    strength = int(ap_props.Get("org.freedesktop.NetworkManager.AccessPoint", "Strength"))
    flags = int(ap_props.Get("org.freedesktop.NetworkManager.AccessPoint", "Flags"))
    wpa_flags = int(ap_props.Get("org.freedesktop.NetworkManager.AccessPoint", "WpaFlags"))
    rsn_flags = int(ap_props.Get("org.freedesktop.NetworkManager.AccessPoint", "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._thread = threading.Thread(target=self._run, daemon=True)
    self._thread.start()

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

  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 _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