"""
 Reference: https://blog.jmaker.com.tw/arduino-ds1302-lcd/
            Arduino大字型LCD時鐘，使用DS1302模組
"""

from machine import Pin, I2C
import utime
import sys, os
import ds1307
import lcd_big_api
import wlan
from sync_time import sync_time_NTP as sync_time

I2C_FREQ = 400000

# 配置控制GPIO
if(sys.platform=="esp8266"):
  led_pin = 2 # GPIO2(D4)
  button_pin = 4 # GPIO4(D2)
  I2C_SDA = 4 # GPIO4(D2)
  I2C_SCL = 5 # GIPO5(D1)
  # Initializing the I2C method for ESP8266
  i2c = I2C(scl=Pin(I2C_SCL), sda=Pin(I2C_SDA), freq=I2C_FREQ)
elif(sys.platform=="esp32"):
  machine_info = os.uname().machine.upper()
  if "S3" in machine_info:
    print("正在初始化 ESP32-S3 的腳位...")
    led_pin = None  # 有板載 LED 時填 GPIO 編號，例如 48；沒有就維持 None
    button_pin = 0  # BOOT 鍵
    I2C_SDA = 5 # GPIO5
    I2C_SCL = 4 # GPIO4
  else:
    print("正在初始化傳統 ESP32 的腳位...")
    led_pin = 2  # Initialize LED on GPIO2
    button_pin = 35
    I2C_SDA = 21 # GPIO21
    I2C_SCL = 22 # GPIO22

  # Initialize I2C
  i2c = I2C(0, scl=Pin(I2C_SCL), sda=Pin(I2C_SDA), freq=I2C_FREQ)  #initializing the I2C method for ESP32
elif(sys.platform=="rp2"):
  led_pin = "LED"  # Initialize LED
  button_pin = 21
  I2C_SDA = 16 # GPIO16
  I2C_SCL = 17 # GPIO17
  # Initializing the I2C method for pi Pico
  i2c = I2C(0, scl=Pin(I2C_SCL), sda=Pin(I2C_SDA), freq=I2C_FREQ)

# Function to handle button press interrupt (optional)
def button_press(pin):
  global button_down
  button_down = True

#Timer Function Callback
def timerFunc0(t):
  global TimeDone
  TimeDone = True

# Start Function
if __name__ == "__main__":
  print("Hello, " + sys.platform + "!")

  # Define GPIO pins for push button
  button = Pin(button_pin, Pin.IN, Pin.PULL_UP)  # Internal pull-up resistor

  # Attach interrupt to the push button pin
  button.irq(trigger=Pin.IRQ_FALLING, handler=button_press)
  button_down = False

  led = Pin(led_pin, Pin.OUT) if led_pin is not None else None
  if led:
    led.value(0)

  wlan.connect_wifi() # Connecting to WiFi Router
  utime.sleep_ms(1000)

  # 自動偵測 I2C 設備位址
  devices = i2c.scan()  # I2C scanning
  if len(devices) != 0:
    print('Number of I2C devices found=',len(devices))
    for device in devices:
      print("Device Hexadecimel Address= ",hex(device))
  else:
    raise OSError("No i2c device found!")

  # 預設 LCD I2C 位址為 0x27 或 0x3F
  lcd_addr = 0x27 if 0x27 in devices else 0x3F
  lcd = lcd_big_api.I2cLcd(i2c, lcd_addr, 2, 16)

  rtc = ds1307.DS1307(i2c)

  print("Hello, Pi Pico!")
  now = (2018, 3, 24, 6, 13, 45, 21, 0)
  rtc.datetime(now)
  lcd.clear()

  led.on()
  timer = sync_time()  # Synchronize the time
  if timer != None:
    rtc.datetime((timer[0], timer[1], timer[2], timer[6] + 1, timer[3], timer[4], timer[5], 0))
    print(rtc.datetime())
  led.off()

  # 載入自訂大數字字形
  for i, pattern in enumerate(lcd_big_api.custom_patterns):
    lcd.custom_char(i, pattern)

  last_sec = -1

  try:
    while True:
      # year, month, day, hour, minute, sec = rtc.datetime()
      time_now = rtc.datetime()
      year = time_now[0]
      month = time_now[1]
      day = time_now[2]
      hour = time_now[4]
      minute = time_now[5]
      sec = time_now[6]

      # 僅每秒更新一次 LCD，避免畫面閃爍
      if sec != last_sec:
        last_sec = sec

        # 排版：[HH] : [MM] [SS]
        # 1602 LCD 排版 (共 16 格)：
        # Col 0~2: 時(十位)
        # Col 3~5: 時(個位)
        # Col 6: 冒號 ':'
        # Col 7~9: 分(十位)
        # Col 10~12: 分(個位)
        # Col 14~15: 秒數(小字體)

        lcd_big_api.draw_big_digit(lcd, 0, hour // 10)
        lcd_big_api.draw_big_digit(lcd, 3, hour % 10)

        # 顯示閃爍的中間冒號
        lcd.move_to(6, 0)
        lcd.write_char(ord(':') if sec % 2 == 0 else 32)
        lcd.move_to(6, 1)
        lcd.write_char(ord(':') if sec % 2 == 0 else 32)

        lcd_big_api.draw_big_digit(lcd, 7, minute // 10)
        lcd_big_api.draw_big_digit(lcd, 10, minute % 10)

        # 右側顯示小字體秒數
        lcd.move_to(14, 0)
        lcd.write_char(ord('0') + sec // 10)
        lcd.move_to(15, 0)
        lcd.write_char(ord('0') + sec % 10)

      if button_down == True:
        timer = sync_time()  # Synchronize the time
        if timer != None:
          rtc.datetime((timer[0], timer[1], timer[2], timer[6] + 1, timer[3], timer[4], timer[5], 0))
        button_down = False

      utime.sleep_ms(100)

  except KeyboardInterrupt: # 使用者中斷執行(通常是輸入^C)
    print("Stop")