import network
import urequests
import machine
import time

# ─── WiFi ─────────────────────────────────────────────
SSID     = "Wokwi-GUEST"
PASSWORD = ""

wifi = network.WLAN(network.STA_IF)
wifi.active(True)
wifi.connect(SSID, PASSWORD)

print("Connecting to WiFi...")
while not wifi.isconnected():
    time.sleep(0.5)

print("WiFi Connected!")
print(wifi.ifconfig())

# ─── Telegram ─────────────────────────────────────────
BOT_TOKEN = "8740683356:AAF7H149GQE_6chQF-yyuxP3VcjdhrAhUz8"
CHAT_ID   = 7585756130

def send_telegram(msg):
    try:
        msg_encoded = msg.replace(" ", "%20").replace("\n", "%0A")
        url = (
            "https://api.telegram.org/bot"
            + BOT_TOKEN
            + "/sendMessage?chat_id="
            + str(CHAT_ID)
            + "&text="
            + msg_encoded
        )
        r = urequests.get(url)
        print("Telegram:", r.text[:50])
        r.close()
    except Exception as e:
        print("Telegram error:", e)

# ─── Time đơn giản (KHÔNG dùng localtime) ─────────────
start_time = time.ticks_ms()

def get_uptime():
    sec = time.ticks_diff(time.ticks_ms(), start_time) // 1000
    return str(sec) + "s"

def build_msg(event):
    return (
        "ESP32 IR\n"
        "Event: " + event + "\n"
        "Uptime: " + get_uptime()
    )

# ─── Pins ─────────────────────────────────────────────
ir_entry  = machine.Pin(14, machine.Pin.IN, machine.Pin.PULL_UP)
ir_exit   = machine.Pin(27, machine.Pin.IN, machine.Pin.PULL_UP)
red_led   = machine.Pin(26, machine.Pin.OUT)
green_led = machine.Pin(25, machine.Pin.OUT)

red_led.value(0)
green_led.value(0)

print("System Ready!")

# 🚀 Gửi khi khởi động (delay nhẹ để chắc WiFi ổn định)
time.sleep(1)
send_telegram(build_msg("SYSTEM START"))

# ─── State + debounce ─────────────────────────────────
entry_triggered = False
exit_triggered  = False

last_trigger_time = 0

def can_trigger(delay=800):
    global last_trigger_time
    now = time.ticks_ms()
    if time.ticks_diff(now, last_trigger_time) > delay:
        last_trigger_time = now
        return True
    return False

# ─── Main Loop ────────────────────────────────────────
while True:
    entry_val = ir_entry.value()
    exit_val  = ir_exit.value()

    # ENTRY
    if entry_val == 0 and not entry_triggered and can_trigger():
        entry_triggered = True
        exit_triggered  = False

        red_led.value(1)
        green_led.value(0)

        print("Object Entered!")
        send_telegram(build_msg("ENTER"))

    # EXIT
    if exit_val == 0 and entry_triggered and not exit_triggered and can_trigger():
        exit_triggered  = True
        entry_triggered = False

        red_led.value(0)
        green_led.value(1)

        print("Object Gone!")
        send_telegram(build_msg("EXIT"))

        time.sleep(2)
        green_led.value(0)

    time.sleep(0.05)