print("Program: Emergency Alert")
print("Date: 24/10/2024")
print("Created by: Wak")

# Import Libraries
from machine import Pin, SoftI2C
from utime import sleep
import oled_lib  # Ensure oled_lib is available

# Pin Declarations
red_led_pin = Pin(12, Pin.OUT)  # Red LED for emergency system
buzzer_pin = Pin(13, Pin.OUT)   # Buzzer for emergency system
button_pin = Pin(15, Pin.IN, Pin.PULL_UP)  # Button with internal pull-up for toggle
oled_i2c = SoftI2C(scl=Pin(22), sda=Pin(21))  # OLED I2C for display
slide_pin = Pin(2, Pin.IN, Pin.PULL_UP)    # Slide switch for reset

# OLED Object Declaration
wak = oled_lib.SSD1306_I2C(width=128, height=64, i2c=oled_i2c)

# Variables
emergency_state = False  # Emergency state flag
system_active = False  # Control system on/off state
previous_button_state = 1  # Initial state of button

# Function to make buzzer beep
def buzzer_beep(duration=0.2):
    buzzer_pin.on()
    sleep(duration)
    buzzer_pin.off()

# Main Program
print("System Initialized.")

while True:
    # Reset system if slide switch is toggled
    if slide_pin.value() == 0:
        emergency_state = False
        system_active = False
        print("System Reset")
        wak.fill(0)
        wak.text("System Reset", 10, 20, 1)
        wak.show()
        sleep(0.5)  # Debounce delay for slide switch
        continue

    # Read button state
    current_button_state = button_pin.value()

    # Toggle system on/off when button is pressed
    if current_button_state == 0 and previous_button_state == 1:
        system_active = not system_active  # Toggle system state
        print("System Activated" if system_active else "System Deactivated")
        buzzer_beep(0.3)  # Beep for system state change

    # If system is active, handle emergency logic
    if system_active:
        if emergency_state:
            # Emergency active: LED and SOS message
            red_led_pin.on()
            wak.fill(0)
            wak.text("Emergency SOS!", 10, 20, 1)
            wak.show()
        else:
            # Normal system state
            red_led_pin.off()
            wak.fill(0)
            wak.text("System Normal", 10, 20, 1)
            wak.show()

        # Emergency state toggled by button press
        if current_button_state == 0 and previous_button_state == 1:
            emergency_state = not emergency_state
            print("Emergency Mode Activated" if emergency_state else "Emergency Mode Deactivated")
            buzzer_beep(0.2)  # Beep for emergency state toggle

    else:
        # System is off
        red_led_pin.off()
        buzzer_pin.off()
        wak.fill(0)
        wak.text("System Off", 10, 20, 1)
        wak.show()

    # Update button state for debouncing
    previous_button_state = current_button_state

    # Debounce delay
    sleep(0.1)