import time
from enum import Enum
from typing import Dict

import paho.mqtt.client as mqtt
import json
import threading

scene = "up-dark"


class Position(Enum):
    UP = 1
    DOWN = 2
    HALF = 3


class Fyrtur:
    def __init__(self, topic, top, bottom):
        self.topic = topic
        self.top = top
        self.bottom = bottom
        self.current_position = 100
        self.wanted_position = 100

    def update_position(self, payload):
        self.current_position = payload["position"]

    def needs_publish(self):
        return self.wanted_position != self.current_position

    def topic_and_payload_for_set(self):
        payload = {"position": self.wanted_position}
        return ("%s/set" % self.topic), json.dumps(payload)


class FyrturWatcher:
    def __init__(self, fyrturs: Dict[str, Fyrtur]):
        self.fyrturs = fyrturs

    def get_topics(self):
        return [fyrtur.topic for fyrtur in self.fyrturs.values()]

    def update_position(self, topic, payload):
        for fyrtur in self.fyrturs.values():
            if fyrtur.topic == topic:
                fyrtur.update_position(payload)
                return

    def update(self, name, position: Position):
        fyrtur: Fyrtur = self.fyrturs.get(name)
        if position == Position.UP:
            fyrtur.wanted_position = fyrtur.top
        elif position == Position.DOWN:
            fyrtur.wanted_position = fyrtur.bottom
        elif position == Position.HALF:
            fyrtur.wanted_position = round(
                (fyrtur.top - fyrtur.bottom) / 2 + fyrtur.bottom
            )

    def publish(self, client):
        for fyrtur in self.fyrturs.values():
            if fyrtur.needs_publish():
                topic, payload = fyrtur.topic_and_payload_for_set()
                client.publish(topic, payload)
                time.sleep(2)


watcher = FyrturWatcher(
    {
        "office1": Fyrtur(topic="zigbee2mqtt/office_fyrtur_1", top=100, bottom=16),
        "office2": Fyrtur(topic="zigbee2mqtt/office_fyrtur_2", top=100, bottom=22),
        "bedroom": Fyrtur(topic="zigbee2mqtt/bedroom_fyrtur_1", top=100, bottom=16),
    }
)


# The callback for when the client receives a CONNACK response from the server.
def on_connect(client, _userdata, _flags, rc):
    print("Connected with result code " + str(rc))

    threading.Thread(target=loop_thread, args=(client,), daemon=True).start()

    # Subscribing in on_connect() means that if we lose the connection and
    # reconnect then subscriptions will be renewed.
    client.subscribe("control/lights/set")
    for topic in watcher.get_topics():
        client.subscribe(topic)


# The callback for when a PUBLISH message is received from the server.
def on_message(client, _userdata, msg):
    global scene
    (topic, payload) = parse_message(msg)
    if topic == "control/lights/set":
        print("set scene %s -> %s" % (scene, payload["scene"]))
        scene = payload["scene"]
        update_scene(client)
    else:
        print("got %s" % topic)
        watcher.update_position(topic, payload)


def parse_message(msg):
    m_decode = str(msg.payload.decode("utf-8", "ignore"))
    payload = json.loads(m_decode)  # decode json data
    return msg.topic, payload


def update_scene(client):
    if scene in ["night", "down"]:
        watcher.update("office1", Position.DOWN)
        watcher.update("office2", Position.DOWN)
        watcher.update("bedroom", Position.DOWN)
    elif scene in ["default", "up-bright", "up-dark", "outside"]:
        watcher.update("office1", Position.UP)
        watcher.update("office2", Position.UP)
        watcher.update("bedroom", Position.UP)
    elif scene in ["half"]:
        watcher.update("office1", Position.HALF)
        watcher.update("office2", Position.HALF)
        watcher.update("bedroom", Position.HALF)
    else:
        watcher.update("office1", Position.UP)
        watcher.update("office2", Position.UP)
        watcher.update("bedroom", Position.UP)

    watcher.publish(client)


def loop_thread(client):
    while True:
        watcher.publish(client)
        time.sleep(120)


if __name__ == "__main__":
    mqttClient = mqtt.Client()
    mqttClient.on_connect = on_connect
    mqttClient.on_message = on_message
    mqttClient.username_pw_set("homeassistant", password="password")
    mqttClient.connect("pepe.private", 1883, 60)
    # Blocking call that processes network traffic, dispatches callbacks and
    # handles reconnecting.
    # Other loop*() functions are available that give a threaded interface and a
    # manual interface.
    mqttClient.loop_forever()