import struct
import board
import displayio
import terminalio
import wifi
import socketpool
import time
import rtc
from adafruit_bitmap_font import bitmap_font
from adafruit_display_text import label

# Get wifi details and more from a secrets.py file
try:
    from secrets import secrets
except ImportError:
    print("WiFi secrets are kept in secrets.py, please add them there!")
    raise

print("My MAC addr:", [hex(i) for i in wifi.radio.mac_address])

print("Connecting to %s"%secrets["ssid"])
wifi.radio.connect(secrets["ssid"], secrets["password"])
print("Connected to %s!"%secrets["ssid"])
print("My IP address is", wifi.radio.ipv4_address)


# NTP Code from https://gist.github.com/netroy/d1bff654fa58b884d63894ca2c890fc6

TZ_OFFSET = 3600
NTP_SERVER = "pool.ntp.org"
NTP_PORT = 123


def get_ntp_time(pool):
  packet = bytearray(48)
  packet[0] = 0b00100011

  for i in range(1, len(packet)):
    packet[i] = 0

  with pool.socket(pool.AF_INET, pool.SOCK_DGRAM) as sock:
    sock.sendto(packet, (NTP_SERVER, NTP_PORT))
    sock.recvfrom_into(packet)
    destination = time.monotonic_ns()

  seconds = struct.unpack_from("!I", packet, offset=len(packet) - 8)[0]
  monotonic_start = seconds - 2_208_988_800 - (destination // 1_000_000_000)
  return time.localtime(time.monotonic_ns() // 1_000_000_000 + monotonic_start + TZ_OFFSET)

pool = socketpool.SocketPool(wifi.radio)
now = get_ntp_time(pool)
rtc.RTC().datetime = now

print("Synced with NTP")


display=board.DISPLAY

text="__:__:__"
font=bitmap_font.load_font("/font/Helvetica-Bold-36.bdf")
color=0xFF00FF

text_area=label.Label(font,text=text,color=color)

text_area.x=20
text_area.y=20

display.show(text_area)

last_time=time.localtime()

def update_time(text_label):
  global last_time
  now = time.localtime()
  if now.tm_sec>last_time.tm_sec or now.tm_sec==0:
    text_label.text = "%02d:%02d:%02d" % (now.tm_hour, now.tm_min, now.tm_sec)
    last_time=now

while True:
    update_time(text_area)
    time.sleep(0.1)