# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT

from os import getenv

import adafruit_connection_manager
import board
import busio
import neopixel
from adafruit_esp32spi import adafruit_esp32spi, adafruit_esp32spi_wifimanager
from digitalio import DigitalInOut

import adafruit_minimqtt.adafruit_minimqtt as MQTT

# Get WiFi details and MQTT keys, ensure these are setup in settings.toml
ssid = getenv("CIRCUITPY_WIFI_SSID")
password = getenv("CIRCUITPY_WIFI_PASSWORD")
broker = getenv("broker")
username = getenv("username")
paswword = getenv("paswword")

### WiFi ###

# If you are using a board with pre-defined ESP32 Pins:
esp32_cs = DigitalInOut(board.ESP_CS)
esp32_ready = DigitalInOut(board.ESP_BUSY)
esp32_reset = DigitalInOut(board.ESP_RESET)

# If you have an externally connected ESP32:
# esp32_cs = DigitalInOut(board.D9)
# esp32_ready = DigitalInOut(board.D10)
# esp32_reset = DigitalInOut(board.D5)

spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)
"""Use below for Most Boards"""
status_pixel = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=0.2)  # Uncomment for Most Boards
"""Uncomment below for ItsyBitsy M4"""
# status_pixel = dotstar.DotStar(board.APA102_SCK, board.APA102_MOSI, 1, brightness=0.2)
# Uncomment below for an externally defined RGB LED
# import adafruit_rgbled
# from adafruit_esp32spi import PWMOut
# RED_LED = PWMOut.PWMOut(esp, 26)
# GREEN_LED = PWMOut.PWMOut(esp, 27)
# BLUE_LED = PWMOut.PWMOut(esp, 25)
# status_pixel = adafruit_rgbled.RGBLED(RED_LED, BLUE_LED, GREEN_LED)
wifi = adafruit_esp32spi_wifimanager.WiFiManager(esp, ssid, password, status_pixel=status_pixel)

### Topic Setup ###

# MQTT Topic
# Use this topic if you'd like to connect to a standard MQTT broker
mqtt_topic = "test/topic"

# Adafruit IO-style Topic
# Use this topic if you'd like to connect to io.adafruit.com
# mqtt_topic = 'aio_user/feeds/temperature'

### Code ###


# Define callback methods which are called when events occur
def connect(client, userdata, flags, rc):
    # This function will be called when the client is connected
    # successfully to the broker.
    print("Connected to MQTT Broker!")
    print(f"Flags: {flags}\n RC: {rc}")


def disconnect(client, userdata, rc):
    # This method is called when the client disconnects
    # from the broker.
    print("Disconnected from MQTT Broker!")


def subscribe(client, userdata, topic, granted_qos):
    # This method is called when the client subscribes to a new feed.
    print(f"Subscribed to {topic} with QOS level {granted_qos}")


def unsubscribe(client, userdata, topic, pid):
    # This method is called when the client unsubscribes from a feed.
    print(f"Unsubscribed from {topic} with PID {pid}")


def publish(client, userdata, topic, pid):
    # This method is called when the client publishes data to a feed.
    print(f"Published to {topic} with PID {pid}")


# Get certificate and private key from a certificates.py file
try:
    from certificates import DEVICE_CERT, DEVICE_KEY
except ImportError:
    print("Certificate and private key data is kept in certificates.py, please add them there!")
    raise

# Set Device Certificate
esp.set_certificate(DEVICE_CERT)

# Set Private Key
esp.set_private_key(DEVICE_KEY)

# Connect to WiFi
print("Connecting to WiFi...")
wifi.connect()
print("Connected!")

pool = adafruit_connection_manager.get_radio_socketpool(esp)
ssl_context = adafruit_connection_manager.get_radio_ssl_context(esp)

# Set up a MiniMQTT Client
client = MQTT.MQTT(
    broker=broker,
    username=username,
    password=password,
    socket_pool=pool,
    ssl_context=ssl_context,
)

# Connect callback handlers to client
client.on_connect = connect
client.on_disconnect = disconnect
client.on_subscribe = subscribe
client.on_unsubscribe = unsubscribe
client.on_publish = publish

print(f"Attempting to connect to {client.broker}")
client.connect()

print(f"Subscribing to {mqtt_topic}")
client.subscribe(mqtt_topic)

print(f"Publishing to {mqtt_topic}")
client.publish(mqtt_topic, "Hello Broker!")

print(f"Unsubscribing from {mqtt_topic}")
client.unsubscribe(mqtt_topic)

print(f"Disconnecting from {client.broker}")
client.disconnect()