import network
import urequests
import time
import ujson
import gc

SSID = "Wokwi-GUEST"
PASSWORD = ""

WEBHOOK_URL = "https://omari-uncollegiate-hang.ngrok-free.dev/crypto"

coins = ["BTCUSDT","ETHUSDT","SOLUSDT"]


# -------------------
# WIFI
# -------------------

def connect_wifi():

    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)

    if not wlan.isconnected():

        print("Connecting WiFi...")

        wlan.connect(SSID, PASSWORD)

        while not wlan.isconnected():
            time.sleep(1)

    print("WiFi Connected:", wlan.ifconfig())

    return wlan


# -------------------
# Send Webhook
# -------------------

def send(msg):

    try:

        print("Sending:", msg)

        payload = ujson.dumps({
            "msg": msg
        })

        headers = {
            "Content-Type": "application/json"
        }

        r = urequests.post(
            WEBHOOK_URL,
            data=payload,
            headers=headers
        )

        print("Server:", r.status_code)

        r.close()

    except Exception as e:

        print("Webhook error:", e)


# -------------------
# Get Crypto Price
# -------------------

def get_price(symbol):

    try:

        url = "https://api.binance.com/api/v3/ticker/price?symbol=" + symbol

        r = urequests.get(url)

        data = r.json()

        r.close()

        return data["price"]

    except Exception as e:

        print("Price error:", e)

        return None


# -------------------
# MAIN
# -------------------

wifi = connect_wifi()

send("🚀 ESP32 Crypto Alert Started")

while True:

    try:

        if not wifi.isconnected():

            print("WiFi reconnecting...")

            wifi = connect_wifi()

        print("Free RAM:", gc.mem_free())

        for coin in coins:

            print("Checking:", coin)

            price = get_price(coin)

            if price:

                msg = coin + " : " + price

                send(msg)

            gc.collect()

            time.sleep(3)

    except Exception as e:

        print("Loop error:", e)

    time.sleep(60)