print("Hello, PRACTICAL TEST PROJECT FOR SDG 16 SMART ACCESS")
print("TITLE: SMART ACCESS")

import machine
import time
import neopixel
from machine import Pin, PWM, SoftI2C, ADC

# 1. Import library
from oled_library import SSD1306_I2C
from rfid_library import MFRC522

print("Hello, SDG 16 SMART ACCESS SYSTEM (LDR MODE)")

# --- Pin Declarations ---
i2c = SoftI2C(scl=Pin(22), sda=Pin(21))
oled = SSD1306_I2C(128, 64, i2c)

# LDR Sensor (Pin 34)
ldr = ADC(Pin(34))
ldr.atten(ADC.ATTN_11DB) # Untuk bacaan 0-3.3V

trig = Pin(26, Pin.OUT)
echo = Pin(25, Pin.IN)
pir = Pin(27, Pin.IN)
reset_button = Pin(32, Pin.IN, Pin.PULL_UP)

buzzer = PWM(Pin(14))
buzzer.duty(0)

servo = PWM(Pin(15), freq=50)
np = neopixel.NeoPixel(Pin(12), 16)

# RFID Setup
rfid = MFRC522(18, 23, 19, 4, 5)
ALLOWED_UID = [4, 34, 4, 0] 

# --- Functions ---

def set_neopixel(color):
    for i in range(16):
        np[i] = color
    np.write()

def set_servo_angle(angle):
    duty = int(((angle / 180) * 75) + 40)
    servo.duty(duty)

def get_distance():
    trig.off()
    time.sleep_us(2)
    trig.on()
    time.sleep_us(10)
    trig.off()
    while echo.value() == 0: pass
    t1 = time.ticks_us()
    while echo.value() == 1: pass
    t2 = time.ticks_us()
    return (time.ticks_diff(t2, t1) * 0.0343) / 2

def reset_system():
    global system_alarm
    system_alarm = False
    buzzer.duty(0) 
    oled.fill(0)
    oled.text("SYSTEM READY", 15, 25)
    oled.show()
    set_neopixel((150, 150, 0)) 
    set_servo_angle(0)

# --- Main Loop ---

reset_system()
system_alarm = False

while True:
    if reset_button.value() == 0:
        reset_system()
        time.sleep(0.5)

    # Baca nilai LDR dan tukar ke Lux (Anggaran dalam Wokwi)
    # Wokwi LDR: Gelap = nilai besar, Terang = nilai kecil
    ldr_value = ldr.read() 
    # Anggaran 100 lux dalam Wokwi (bergantung kepada litar, kita guna threshold 2000)
    # Kalau gelap (lux rendah), ldr_value akan tinggi
    is_dark = ldr_value > 2000 

    if system_alarm:
        # Siren Polis & Lampu Kelip
        buzzer.freq(600)
        buzzer.duty(512)
        set_neopixel((255, 0, 0)) 
        time.sleep(0.2)
        buzzer.freq(900)
        buzzer.duty(512)
        set_neopixel((0, 0, 0)) 
        time.sleep(0.2)
        continue 

    if not system_alarm:
        # LOGIK BARU: Cek PIR + LDR
        if pir.value() == 1:
            if is_dark:
                # Lux bawah 100 (GELAP): Keluar bunyi siren
                system_alarm = True
                oled.fill(0)
                oled.text("MOTION TRIGGERED!", 4, 25)
                oled.show()
            else:
                # Lux atas 100 (TERANG): Hanya OLED sahaja, tiada bunyi
                oled.fill(0)
                oled.text("MOTION DETECTED", 5, 25)
                oled.text("(DAY MODE)", 20, 40)
                oled.show()
                set_neopixel((255, 165, 0)) # Orange sekejap
                time.sleep(2)
                reset_system()
            continue

        if get_distance() < 50:
            oled.fill(0)
            oled.text("PLEASE SCAN RFID", 0, 25)
            oled.show()
            
            uid = rfid.read_uid() 
            if uid: 
                if uid == ALLOWED_UID:
                    oled.fill(0)
                    oled.text("SUCCESSFUL", 25, 25)
                    oled.show()
                    set_neopixel((0, 255, 0)) 
                    set_servo_angle(90)
                    
                    # DING DONG 7-ELEVEN
                    buzzer.duty(512)
                    buzzer.freq(1318) 
                    time.sleep(0.2); buzzer.duty(0); time.sleep(0.05); buzzer.duty(512)
                    buzzer.freq(1047) 
                    time.sleep(0.4); buzzer.duty(0)
                    
                    time.sleep(2.5)
                    reset_system()
                else:
                    # TOL TAK CUKUP BAKI
                    oled.fill(0)
                    oled.text("ACCESS DENIED", 10, 25)
                    oled.show()
                    set_neopixel((255, 0, 0)) 
                    for _ in range(3):
                        buzzer.freq(300); buzzer.duty(512); time.sleep(0.2)
                        buzzer.duty(0); time.sleep(0.1)
                    reset_system()
        else:
            oled.fill(0)
            oled.text("SYSTEM READY", 15, 25)
            # Tunjuk status cahaya kat OLED untuk senang kau debug
            status_cahaya = "DARK" if is_dark else "LIGHT"
            oled.text("MODE: " + status_cahaya, 15, 40)
            oled.show()
            set_neopixel((150, 150, 0))

    time.sleep(0.1)