# Real-time clock using MicroPython
# https://www.hackster.io/kamaluddinkhan/creating-a-real-time-clock-on-encropi-using-micropython-176fe4
from machine import I2C
from machine import Pin, UART,SPI
import sys
import utime
import network
import ntptime
import st7789
import ds1307
import wlan

# import vga1_8x16 as font1
# import vga1_16x16 as font2
import vga1_16x32 as font

INTERVAL = 1000  # millisecond

# Timezone offset (India = UTC +8:00)
UTC_OFFSET = 28800 # 8 * 60 * 60

DISP_WIDTH = 240
DISP_HEIGHT = 240

#sec min hour week day month year
CurrentTime = b'\x00\x50\x14\x05\x21\x06\x22' #00:00:10 friday 03/03/2022
week  = ["Sun","Mon","Tues","Wed","Thur","Fri","Sat"];

if(sys.platform=="esp32"):
  disp_sck  = 18 # default SCK of SPI(1)
  disp_mosi = 23 # default MOSI of SPI(1)
  disp_miso = 19  # not use
  disp_res = 4
  disp_dc  = 2
  disp_cs  = 5
  disp_blk = 22
  # 初始化 SPI
  disp_spi = SPI(1, baudrate=20000000, sck=Pin(disp_sck), mosi=Pin(disp_mosi), miso=Pin(disp_miso))

  I2C_SDA =21 # GPIO21(I2C SDA)
  I2C_SCL =22 # GPIO22(I2C SCL)
  # Initialize I2C on GP16 (SDA) and GP17 (SCL)
  i2c = I2C(0, scl=Pin(I2C_SCL), sda=Pin(I2C_SDA), freq=400000)     #initializing the I2C method for ESP32

elif(sys.platform=="rp2"):
  disp_sck  = 18 # default SCK of SPI(0)
  disp_mosi = 19 # default MOSI of SPI(0)
  disp_miso = 16  # not use
  disp_res = 20
  disp_dc  = 21
  disp_cs  = 17
  disp_blk = 22
  # 初始化 SPI
  disp_spi = SPI(0, baudrate=24000000, polarity=0, phase=0, bits=8, sck=Pin(disp_sck), mosi=Pin(disp_mosi), miso=None)

  I2C_SDA =14 # GPIO14(I2C SDA)
  I2C_SCL =15 # GPIO15(I2C SCL)
  # Initialize I2C on GP14 (SDA) and GP15 (SCL)
  i2c = I2C(1, scl=Pin(I2C_SCL), sda=Pin(I2C_SDA), freq=400000)

def info():
    # tft.init()
    utime.sleep(0.2)
    tft.text(font,"RP2040 RTC", 15,20)
    tft.fill_rect(15, 60, 210,10, st7789.RED)

    tft.text(font,"Real Time", 15,70,st7789.YELLOW)
    tft.text(font,"Clock", 15,100,st7789.YELLOW)
    tft.fill_rect(15, 140, 210, 10, st7789.BLUE)
    utime.sleep(2)
    tft.fill(0) #clear screen

def sync_time_with_retry():
  try:
    print("Syncing with NTP server...")
    ntptime.settime()   # UTC time
    timer = utime.localtime(utime.time() + UTC_OFFSET)
    print("Time synchronized.")
    return timer
  except OSError as e:
    # print("Error syncing time:", e)
    if e.args[0] == 110: # ETIMEDOUT
      print("ETIMEDOUT error during time sync. Retrying in 5 seconds...")
      utime.sleep(5)
      sync_time_with_retry() # Recursive call to retry
    else:
      print(f"An unexpected error occurred: {e}")

# Start Function
if __name__ == '__main__':
  tft = st7789.ST7789(disp_spi,
                        DISP_WIDTH, DISP_HEIGHT,
                        reset=Pin(disp_res, Pin.OUT),
                        cs=Pin(disp_cs, Pin.OUT),
                        dc=Pin(disp_dc, Pin.OUT),
                        backlight=Pin(disp_blk, Pin.OUT),
                        rotation=0)
  print(st7789.__name__, tft.width, "x", tft.height)
  info()

  rtc = ds1307.DS1307(i2c)
  now = (2018, 3, 24, 6, 13, 45, 21, 0)
  rtc.datetime(now)

  # ========== CONNECT WIFI ==========
  wlan.connect_wifi() # Connecting to WiFi Router

  # ========== NTP TIME SYNC ==========
  print("Syncing time from NTP...")
  timer = sync_time_with_retry()  # Synchronize the time
  rtc.datetime((timer[0], timer[1], timer[2], timer[6] + 1, timer[3], timer[4], timer[5], 0))

  lastTime = utime.ticks_ms()
  # ========== MAIN LOOP ==========
  while True:
    try:
      currTime = utime.ticks_ms()
      if (currTime - lastTime > INTERVAL):
        lastTime = currTime

        tm = rtc.datetime()
        # t = utime.time() + UTC_OFFSET
        # tm = utime.localtime(t)

        year = "{:04d}".format(tm[0])
        month = "{:02d}".format(tm[1])
        day = "{:02d}".format(tm[2])
        hour = "{:02d}".format(tm[4])
        minute = "{:02d}".format(tm[5])
        second = "{:02d}".format(tm[6])

        # SERIAL PRINT
        str_date = year + ":" + month + ":" + day
        str_time = hour + ":" + minute + ":" + second
        print("Date: " + str_date, end='')
        print("; Time: " + str_time)

        # DISPLAY
        tft.text(font,"Date: ", 15,16,st7789.WHITE)
        tft.text(font,str_date, 15,56,st7789.WHITE)
        tft.fill_rect(15, 96, 210,10, st7789.RED)

        tft.text(font,"Time: ", 15,112,st7789.WHITE)
        tft.text(font,str_time, 15,152,st7789.YELLOW)
        tft.fill_rect(15, 190, 210, 10, st7789.BLUE)

      utime.sleep_ms(100)
    except KeyboardInterrupt: # 使用者中斷執行(通常是輸入^C)
      pass