import time
from machine import Pin, PWM, ADC
import network
import ntptime
import urequests  # Required for HTTP requests to ThingSpeak
import gc  # For garbage collection to free up memory

# Pin assignments
pir_pins = [25, 33]  # Motion Sensors for bulbs 1 and 2
led_pins = [26, 27]  # LEDs for bulbs 1 and 2
ldr_pins = [34, 35]  # LDRs for bulbs 1 and 2

# Initialize components
pir_sensors = [Pin(p, Pin.IN) for p in pir_pins]
led_pwms = [PWM(Pin(p), freq=1000) for p in led_pins]
ldrs = [ADC(Pin(p)) for p in ldr_pins]

# Constants
DIM_BRIGHTNESS = 100  # Brightness level for dim mode
BRIGHT_BRIGHTNESS = 800  # Brightness level for bright mode
LIGHT_THRESHOLD = 500  # Light intensity threshold for turning on LEDs
MOTION_BRIGHTNESS_DURATION = 10  # Duration (seconds) for maintaining bright mode after motion

# ThingSpeak Configuration
THING_SPEAK_API_KEY = "9U1ELSLF51BDGUT9"  # Replace with your ThingSpeak API Key
THING_SPEAK_URL = "http://api.thingspeak.com/update"  # Ensure the correct URL

# Variables
current_states = ["Off"] * 2  # Now for two bulbs
motion_timers = [0, 0]  # Track motion timeout for each LED

# Wi-Fi Credentials
WIFI_SSID = "Wokwi-GUEST"
WIFI_PASSWORD = ""

# Connect to Wi-Fi
def connect_to_wifi():
    print("Connecting to WiFi", end="")
    sta_if = network.WLAN(network.STA_IF)
    sta_if.active(True)
    sta_if.connect(WIFI_SSID, WIFI_PASSWORD)
    attempts = 0
    while not sta_if.isconnected() and attempts < 10:  # Retry up to 10 times
        print(".", end="")
        time.sleep(0.5)
        attempts += 1
    if sta_if.isconnected():
        print(" Connected!")
    else:
        print(" Wi-Fi connection failed!")
        return False
    return True

# Synchronize time with NTP server
def synchronize_time():
    try:
        print("Synchronizing time with NTP server...")
        ntptime.settime()
        print("Time synchronized!")
    except Exception as e:
        print("Failed to synchronize time:", e)

# Send data to ThingSpeak
def send_to_thingspeak(motion, ldr_value, light_state):
    try:
        # Convert light_state to a numeric value for ThingSpeak
        if light_state == "Off":
            light_state_value = 0
        elif light_state == "Dim":
            light_state_value = 1
        elif light_state == "Bright":
            light_state_value = 2
        
        # Prepare the query string with your ThingSpeak API Key and fields
        url = f"{THING_SPEAK_URL}?api_key={THING_SPEAK_API_KEY}&field1={motion}&field2={ldr_value}&field3={light_state_value}"
        response = urequests.get(url, timeout=10)  # Set a timeout for the HTTP request
        response.close()  # Close the response to free up resources
        print("Data sent to ThingSpeak.")
    except Exception as e:
        print("Error sending data to ThingSpeak:", e)
        time.sleep(5)  # Wait for a while before retrying

# Main program
if connect_to_wifi():
    synchronize_time()

    while True:
        # Get current time
        current_time = time.localtime()
        formatted_time = f"{current_time[3]:02}:{current_time[4]:02}:{current_time[5]:02}"
        print(f"Current Time: {formatted_time}")
        
        for i in range(2):  # Iterate through each LED and sensor pair for 2 bulbs
            ldr_value = ldrs[i].read()
            motion_detected = pir_sensors[i].value()

            if ldr_value < LIGHT_THRESHOLD:  # If light intensity is below threshold
                if motion_detected == 1:
                    led_pwms[i].duty(BRIGHT_BRIGHTNESS)
                    print(f"Bulb {i+1}: Motion detected, LED Bright")
                    current_states[i] = "Bright"
                    motion_timers[i] = time.time()
                elif time.time() - motion_timers[i] > MOTION_BRIGHTNESS_DURATION:
                    led_pwms[i].duty(DIM_BRIGHTNESS)
                    print(f"Bulb {i+1}: No motion, LED Dim")
                    current_states[i] = "Dim"
                else:
                    led_pwms[i].duty(DIM_BRIGHTNESS)  # Maintain dim state
            else:  # If light intensity is above threshold
                led_pwms[i].duty(0)
                print(f"Bulb {i+1}: Light intensity high, LED Off")
                current_states[i] = "Off"
            
            # Send data to ThingSpeak after every loop iteration
            send_to_thingspeak(motion_detected, ldr_value, current_states[i])

        gc.collect()  # Collect garbage to free up memory
        time.sleep(1)  # Sleep for 1 second before next iteration
else:
    print("Failed to connect to Wi-Fi. Exiting...")