#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import http
import os
from typing import Union

import simplejson
import toml
from upnpy import UPnP

from .HueBridge import HueBridge
from .HueUtils import connect, is_valid_config, make_request, is_bridge
from .UserOrError import UserOrError


class Tinge:
    """The class that keeps track of bridges and config
    """

    def __init__(self):
        """Constructor
        """
        self.m_bridges: list[HueBridge] = list()
        self.m_discovered: list[str] = list()
        self.m_config = os.path.join(os.environ['HOME'], ".config/tinge/config")
        self.create_confdir()
        self.read_bridges_from_file()

    def append_bridge(self, bridge: HueBridge):
        self.m_bridges.append(bridge)
        self.m_discovered.append(bridge.get_ipaddress())

    def create_confdir(self):
        """Create the config dir if it does not allready exist
        """
        if not os.path.exists(os.path.dirname(self.m_config)):
            os.makedirs(os.path.dirname(self.m_config))

    def discover_new_bridges(self) -> Union[None, list[dict]]:
        """Use UPnP to discover bridges on the current network
        """
        upnp: UPnP = UPnP()
        discovered_devices = list()
        try:
            discovered_devices = upnp.discover()
        except http.client.BadStatusLine:
            print("UPnP discovery failed")
            return None
        discovered_bridges: list[dict] = list()
        seen_ips: list[str] = list()
        if not discovered_devices:
            print("No devices discovered at this time")
            return None
        for device in discovered_devices:
            discovered: bool = False
            if (device.host not in self.m_discovered) and (device.host not in seen_ips):
                seen_ips.append(device.host)
                # Let's check if the device has the default name, if so we assume it's a hue bridge
                if device.get_friendly_name().startswith("Philips hue"):
                    discovered = True
                # If not we try to do a request against the api and see if we get an answer we can understand
                else:
                    discovered = is_bridge(device.host)
                if discovered:
                    bridge = {'ipaddress': device.host, 'name': device.get_friendly_name()}
                    if bridge not in discovered_bridges:
                        discovered_bridges.append(bridge)
        return discovered_bridges

    def get_bridges(self) -> list[HueBridge]:
        """Get the bridges

        Returns:
            list[HueBridge]: The bridges we keep track off
        """
        return self.m_bridges

    def read_bridges_from_file(self):
        """Read config file and add back previously discovered bridges
        """
        if is_valid_config(self.m_config):
            with open(self.m_config, 'r') as configfile:
                mbridges = toml.loads(configfile.read())
                for key, value in mbridges.items():
                    if key not in self.m_discovered:
                        response = make_request(key, "{}/".format(value['user']))
                        if response:
                            name = "{} ({})".format(response.json()['config']['name'], key)
                            bridge: HueBridge = HueBridge(key, value['user'], name)
                            self.m_bridges.append(bridge)
                            self.m_discovered.append(key)
                        else:
                            bridge: HueBridge = HueBridge(key, value['user'], is_reachable=False)
                            self.m_bridges.append(bridge)
                            self.m_discovered.append(key)

    def write_all_bridges_to_conf(self):
        """Save to file
        """
        with open(self.m_config, 'w') as configfile:
            for bridge in self.m_bridges:
                configfile.write('["{}"]\nuser = "{}"\n'.format(bridge.get_ipaddress(), bridge.get_user()))