from machine import Pin, ADC, I2C,PWM
from time import sleep
from pico_i2c_lcd import I2cLcd
i2c = I2C(0, sda=Pin(0), scl=Pin(1))
i2c_add = i2c.scan()
lcd = I2cLcd(i2c, i2c_add[0], 2, 16)
lcd.backlight_on()
lcd.clear()

ldr = ADC(26)
str_lit = PWM(Pin(2))
str_lit2 = PWM(Pin(3))

dark_lit = Pin(4,Pin.OUT)

str_lit.freq(1000)
str_lit2.freq(1000)
ir_pin = Pin(19, Pin.IN)

def day_time():
    str_lit.duty_u16(0)
    str_lit2.duty_u16(0)
    dark_lit.value(0)

def night_time():
    dark_lit.value(1)
def no_vehicle():
    str_lit.duty_u16(10000)
    str_lit2.duty_u16(10000)

def light_status(status):
    lcd.move_to(0,0)
    lcd.putstr(status)

def vehicle_sts_func(vc_sts):
    lcd.move_to(0,1)
    lcd.putstr(vc_sts)

def str_light_function():
    
    str_lit.duty_u16(65000)
    str_lit2.duty_u16(0)
    sleep(0.5)

   
    str_lit.duty_u16(30000)
    str_lit2.duty_u16(65000)
    sleep(0.5)

    str_lit.duty_u16(0)
    str_lit2.duty_u16(30000)
    sleep(0.5)

    str_lit2.duty_u16(0)
while True:

    ldr_value = ldr.read_u16()
    voltage = (ldr_value / 65535) * 3.3

    print("Light Value:", ldr_value)
    print("Voltage:", voltage)

    vehicle_status = "No Vehicle"

    lcd.clear()

    if ldr_value > 50000:
        status = "Bright Light"
        day_time()

    elif 20000 < ldr_value < 50000:
        status = "Dim Light"
        day_time()

    elif 0 < ldr_value < 20000:
        status = "Night Time"
        night_time()

        if ir_pin.value() == 1:
            vehicle_status = "Vehicle Det."
            str_light_function()
        else:
            vehicle_status = "No Vehicle"
            no_vehicle()

    else:
        status = "Unknown"
        day_time()
        dark_lit.value(0)
    light_status(status)
    vehicle_sts_func(vehicle_status)

    sleep(1)