import network
import time
import binascii

# -- Configuration ---
WIFI_SSID = "Wokwi-GUEST"
WIFI_PASS = "" # Wokwi-GUEST has no password


# 1. Initialize the Wi-Fi Interface
# STA_IF stands for "Station Interface"
wlan = network.WLAN(network.STA_IF)
wlan.active(True)


def scan_networks():
   print("Scanning for available Wi-Fi...")
   networks = wlan.scan() # Returns list of tuples
   print(f"Found {len(networks)} networks:")
   for net in networks:
       ssid = net[0].decode('utf-8')
       rssi = net[3]
       print(f" > {ssid:20} | Signal: {rssi} dBm")
   print("-" * 30)


def connect_to_wifi():
   print(f"Attempting to connect to: {WIFI_SSID}")
   wlan.connect(WIFI_SSID, WIFI_PASS)
  
   # Wait for connection with a timeout
   max_wait = 10
   while max_wait > 0:
       if wlan.isconnected():
           break
       max_wait -= 1
       print('Waiting for connection...')
       time.sleep(1)


   if wlan.isconnected():
       print("Successfully Connected!")
       # ifconfig returns (IP, Subnet, Gateway, DNS)
       status = wlan.ifconfig()
       print(f"IP Address: {status[0]}")
       print(f"Gateway:    {status[2]}")
   else:
       print("Connection Failed!")


# --- Execution ---
scan_networks()
connect_to_wifi()


# Keep the connection alive
while True:
   if wlan.isconnected():
       # Blink onboard LED to show heartbeat (GP-WL is internal)
       # Note: In Pico W, LED is on the Wi-Fi chip, not GPIO 25
       pass
   time.sleep(5)