from machine import Pin, I2C, SPI
import time
import ili9341

# ---------------- DS1307 ----------------
DS1307_ADDR = 0x68

i2c = I2C(0, scl=Pin(1), sda=Pin(0), freq=100000)

def bcd_to_dec(b):
    return (b >> 4) * 10 + (b & 0x0F)

def read_ds1307():
    d = i2c.readfrom_mem(DS1307_ADDR, 0x00, 7)
    return (
        bcd_to_dec(d[2] & 0x3F),   # hour
        bcd_to_dec(d[1]),          # min
        bcd_to_dec(d[0] & 0x7F),   # sec
        bcd_to_dec(d[4]),          # day
        bcd_to_dec(d[5]),          # month
        bcd_to_dec(d[6]) + 2000    # year
    )

# ---------------- ILI9341 ----------------
spi = SPI(
    0,
    baudrate=20000000,
    polarity=0,
    phase=0,
    sck=Pin(2),
    mosi=Pin(3)
)

display = ili9341.ILI9341(
    spi,
    cs=Pin(5, Pin.OUT),
    dc=Pin(7, Pin.OUT),
    rst=Pin(6, Pin.OUT),
    w=240,
    h=320
)

BLACK = ili9341.color565(0, 0, 0)
WHITE = ili9341.color565(255, 255, 255)
CYAN  = ili9341.color565(0, 255, 255)

display.fill(BLACK)

# ---------------- SIMPLE FONT (5x7) ----------------
FONT = {
    '0': [0x3E,0x51,0x49,0x45,0x3E],
    '1': [0x00,0x42,0x7F,0x40,0x00],
    '2': [0x42,0x61,0x51,0x49,0x46],
    '3': [0x21,0x41,0x45,0x4B,0x31],
    '4': [0x18,0x14,0x12,0x7F,0x10],
    '5': [0x27,0x45,0x45,0x45,0x39],
    '6': [0x3C,0x4A,0x49,0x49,0x30],
    '7': [0x01,0x71,0x09,0x05,0x03],
    '8': [0x36,0x49,0x49,0x49,0x36],
    '9': [0x06,0x49,0x49,0x29,0x1E],
    ':': [0x00,0x36,0x36,0x00,0x00],
    '-': [0x08,0x08,0x08,0x08,0x08]
}

def draw_char(x, y, ch, color, scale):
    if ch not in FONT:
        return
    bitmap = FONT[ch]
    for col in range(5):
        line = bitmap[col]
        for row in range(7):
            if line & (1 << row):
                for dx in range(scale):
                    for dy in range(scale):
                        display.pixel(
                            x + col*scale + dx,
                            y + row*scale + dy,
                            color
                        )

def draw_text(x, y, text, color, scale):
    for ch in text:
        draw_char(x, y, ch, color, scale)
        x += 6 * scale

# ---------------- MAIN LOOP ----------------
blink = True
last_time = ""

while True:
    h, m, s, d, mo, y = read_ds1307()

    time_str = f"{h:02d}:{m:02d}:{s:02d}"
    date_str = f"{d:02d}-{mo:02d}-{y}"

    if time_str != last_time:
        display.fill(BLACK)

        # Blinking colon
        if not blink:
            time_str = time_str.replace(":", " ")

        # Draw time (BIG)
        draw_text(20, 110, time_str, WHITE, scale=3)

        # Draw date (SMALL)
        draw_text(45, 180, date_str, CYAN, scale=2)

        blink = not blink
        last_time = time_str