from machine import Pin, SoftI2C, RTC
import ssd1306
import time

# Initialize I2C connection
i2c = SoftI2C(sda=Pin(0), scl=Pin(1))

# Initialize 128x64 OLED display
oled = ssd1306.SSD1306_I2C(128, 64, i2c)

# Initialize the Raspberry Pi Pico Real-Time Clock
rtc = RTC()

# Set initial time: (year, month, day, weekday, hours, minutes, seconds, subseconds)
# You can change these numbers to match your current local time
rtc.datetime((2026, 6, 3, 3, 14, 30, 0, 0))

while True:
    # 1. Fetch current timestamp tuple from RTC
    current_time = rtc.datetime()
    
    # 2. Extract values from tuple structure
    year = current_time[0]
    month = current_time[1]
    day = current_time[2]
    hour = current_time[4]
    minute = current_time[5]
    second = current_time[6]
    
    # 3. Format strings with leading zeros using string formatting syntax
    date_str = "{:04d}-{:02d}-{:02d}".format(year, month, day)
    time_str = "{:02d}:{:02d}:{:02d}".format(hour, minute, second)
    
    # 4. Refresh display canvas
    oled.fill(0)
    
    # Write text labels at target pixel coordinates
    oled.text("LOCAL CLOCK", 24, 4)
    oled.text(date_str, 24, 24)
    oled.text(time_str, 32, 44)
    
    # Render updated text frames to hardware
    oled.show()
    
    # 5. Delay execution to prevent display flickering
    time.sleep(1)