#!/usr/bin/python3
# -*- coding: UTF-8 -*-
'''
rtx - RetroText
v0.1
by Anna Christina Naß <acn@acn.wtf>
released under GPL
'''

from cept import *
from rtxPage import rtxPage
import glob # global variables
import config
import rtxHelpers
import rtxModem
import minibtx

import serial
import logging
import getopt
import sys

####

# configure the logging format
logging.basicConfig(format='%(asctime)s %(levelname)s: %(message)s', level=config.LOGLEVEL, datefmt='%Y-%m-%d %I:%M:%S')

# read command line parameters
def OptionsError():
    """ Fehler beim Kommandozeilenparameter """
    print("Aufrufparamter:\n -d [device] -m [direct|modem|minibtx] -b [baudrate]")
    sys.exit()

localport = None
localmode = None
localbaud = None

try:
    opts, args = getopt.gnu_getopt(sys.argv[1:], 'd:m:b:')
except getopt.GetoptError as err:
    OptionsError()

for opt, arg in opts:
    if opt == "-d":
        localport = arg
    if opt == "-m":
        localmode = arg
    if opt == "-b":
        localbaud = arg

if localbaud:
    if not localbaud.isdigit():
        OptionsError()
if localmode:
    if not localmode in ("direct","modem","minibtx"):
        OptionsError()

# initialize serial connection to client
if localport is not None:
    serport = localport
else:
    serport = config.PORT
if localbaud is not None:
    serbaud = localbaud
else:
    serbaud = config.BAUDRATE
if localmode is not None:
    glob.mode = localmode
else:
    glob.mode = config.MODE

logging.debug("Serial port %s, Baud rate %s", serport, serbaud)

if glob.mode == "direct" or glob.mode == "modem":
    glob.ser = serial.Serial(serport, serbaud, timeout=None, rtscts=True, dsrdtr=True)
elif glob.mode == "minibtx":
    glob.ser = serial.Serial(serport, serbaud, timeout=None, bytesize=8, parity='N', stopbits=2, rtscts=False, dsrdtr=False)
else:
    logging.error("wrong mode: %s - this should not happen", glob.mode)
    sys.exit()

logging.debug("Serial port %s opened", glob.ser.name)

while True:
    if glob.mode == "modem":
        rtxModem.init_modem()
        rtxModem.wait_for_caller()
        rtxHelpers.send_welcome_page()

    # main loop to read data from client
    while True:
        in_byte = glob.ser.read(1)

        if glob.mode == "minibtx":
            if in_byte == b'\x01':
                logging.info("miniBtx starts connection... waiting for connection...")
                minibtx.wait_for_minibtx()
                rtxHelpers.send_welcome_page()
                break

        rtxHelpers.process_byte(in_byte)

        if glob.mode == "modem":
            if glob.ser.getCD() == False:
                logging.info("modem hangup.")
                break