# Function: Rotate "EMERGENCY!" using shifting
# SW1 = clockwise (Line 1 → Line 2)
# SW2 = counterclockwise (Line 1 → Line 2, reverse direction)

import time
import board
import digitalio
import busio
import lcd
import i2c_pcf8574_interface

# Setup I2C dan LCD
i2c_bus = busio.I2C(scl=board.GP5, sda=board.GP4)
i2c = i2c_pcf8574_interface.I2CPCF8574Interface(i2c_bus, 0x27)

display = lcd.LCD(i2c, num_rows=2, num_cols=16)
display.set_backlight(True)
display.set_display_enabled(True)

# Setup button
sw1 = digitalio.DigitalInOut(board.GP14)
sw1.direction = digitalio.Direction.INPUT
sw1.pull = digitalio.Pull.UP

sw2 = digitalio.DigitalInOut(board.GP15)
sw2.direction = digitalio.Direction.INPUT
sw2.pull = digitalio.Pull.UP

text = "EMERGENCY!"
lcd_width = 16

# Function clear row
def clear_row(row):
    display.set_cursor_pos(row, 0)
    display.print(" " * lcd_width)

# Function display shifting text
def display_text(row, position, text):
    clear_row(row)
    for i in range(len(text)):
        col = position + i
        if 0 <= col < lcd_width:
            display.set_cursor_pos(row, col)
            display.print(text[i])

# Paparan awal
display.clear()
display.set_cursor_pos(0, 0)
display.print("SW1:CW , SW2:CCW")

while True:
    sw1_pressed = not sw1.value
    sw2_pressed = not sw2.value

    # 🔹 SW1 → CLOCKWISE
    if sw1_pressed:
        display.clear()

        # Line 1: kiri → kanan
        for pos in range(-len(text), lcd_width + 1):
            display_text(0, pos, text)
            time.sleep(0.1)

        # Line 2: kanan → kiri
        for pos in range(lcd_width, -len(text) - 1, -1):
            display_text(1, pos, text)
            time.sleep(0.1)

        display.clear()

    # 🔹 SW2 → COUNTERCLOCKWISE
    elif sw2_pressed:
        display.clear()

        # Line 1: kanan → kiri
        for pos in range(lcd_width, -len(text) - 1, -1):
            display_text(0, pos, text)
            time.sleep(0.01)

        # Line 2: kiri → kanan
        for pos in range(-len(text), lcd_width + 1):
            display_text(1, pos, text)
            time.sleep(0.01)

        display.clear()

    time.sleep(0.05)