import wifi
import time
import controller_config as config

def rssi_to_percent(rssi):
    """Converts RSSI (dBm) to a 0-100% signal strength."""
    MIN_RSSI = -90; MAX_RSSI = -30
    if rssi <= MIN_RSSI: return 0
    if rssi >= MAX_RSSI: return 100
    percent = ((rssi - MIN_RSSI) * 100) / (MAX_RSSI - MIN_RSSI)
    return int(percent)
    
def setup_wifi_ap(ssid, password, channel):
    """
    Configures the device as a Wi-Fi Access Point (AP).
    """
    print(f"Setting up Wi-Fi AP: {ssid} on channel {channel}")
    try:
        wifi.radio.enabled = True
        wifi.radio.start_ap(ssid=ssid, password=password, channel=channel, max_connections=4)
        print(f"AP Started. IP: {wifi.radio.ipv4_address_ap}")
        print(f"Waiting for clients... (SSID is VISIBLE: {ssid})")
        
    except Exception as ex:
        print(f"Error starting AP: {ex}")
        raise

def print_help_file():
    """Reads and prints the help file specified in config."""
    print("\n--- ⌨️ KBD Bot Command List ---")
    try:
        with open(config.HELP_FILE, "r") as f:
            for line in f:
                print(line.strip())
    except OSError:
        print(f"ERROR: Help file not found: {config.HELP_FILE}")
    print("---------------------------------")