import auth, sys
import configparser

config = configparser.ConfigParser()
config.read(sys.argv[1])

def sendString(conn, text):
    conn.sendall(text.encode('ascii'))
 
def getString(conn, max):
 
    result = ""
    index = 0
 
    while index < max:
        c = getChar(conn)
        if (c[0] == '\b' or c[0] == 127) and index > 0:
            result = result[:-1]
            index -= 1
            sendString(conn, "\x1b[D \x1b[D")
            continue
        elif c[0] == '\b' or c[0] == 127:
            continue
        if c[0] == '\r':
            return result
 
        result += c[0]
        sendString(conn, c)
        index += 1
    return result
 
def getCharRaw(conn):
    c = conn.recv(1)
    if c == b'':
        print("Connection dropped")
        raise RuntimeError("Socket connection dropped")
 
    return c
 
def getChar(conn):
 
    while True:
        c = getCharRaw(conn)
        while c[0] == 255:
            c = getCharRaw(conn)
            if c[0] == 251 or c[0] == 252 or c[0] == 253 or c[0] == 254:
                c = getCharRaw(conn)
            elif c[0] == 250:
                c = getCharRaw(conn)
                while c[0] != 240:
                    c = getCharRaw(conn)
 
            c = getCharRaw(conn)
 
        if c[0] != '\n':
            break
 
    return str(c, 'ascii')
 
def comms(conn, addr, node):
    """
    comms - Initializes the communication with the user, authorizes them, and passes them to the menus
    """
    iac_echo = bytes([255, 251, 1])
    iac_sga = bytes([255, 251, 3])
 
    conn.sendall(iac_echo)
    conn.sendall(iac_sga)
    # Splash Screen
    try:
        with open("pages/splash.asc") as splash:
            for line in splash.readlines():
                line = line.replace("%node%", str(node))
                sendString(conn, line + "\r")
            getString(conn, 1)
    except:
        sendString(conn, config.get("Main","DefaultSplash").replace("%node%", str(node)))
 
    # Login Screen
    sendString(conn, "\r\nEnter your username, or type NEW if a new user.")
    sendString(conn, "\r\nLogin: ")
    username = getString(conn, 16)
    if username.replace('\x00','') == "NEW":
        auth.create(conn)
    else:
        sendString(conn, "\r\nPassword: ")
        password = getString(conn, 16)
        auth.login(conn,username,password, node)