import unittest
import uuid
import serial
import time


class Qduplex(unittest.TestCase):
    params = None
    __port1 = None
    __port2 = None
    __baudrate = None

    # varlist: port1, port2, baudrate
    def __init__(self, testname, testfunc, varlist):
        self.params = varlist
        super(Qduplex, self).__init__(testfunc)
        if "port1" in varlist:
            self.__port1 = varlist["port1"]
        else:
            raise Exception('port1 param inside Qduplex must be defined')
        if "port2" in varlist:
            self.__port2 = varlist["port2"]
        else:
            raise Exception('port2 param inside Qduplex must be defined')
        if "baudrate" in varlist:
            self.__baudrate = varlist["baudrate"]
        else:
            raise Exception('baudrate param inside Qduplex must be defined')
        self._testMethodDoc = testname

        # open serial connection
        self.__serial1 = serial.Serial(self.__port1, self.__baudrate, timeout=1)
        self.__serial2 = serial.Serial(self.__port2, self.__baudrate, timeout=1)

    def __del__(self):
        self.__serial1.close()
        self.__serial2.close()

    def execute(self):
        # generate a random uuid
        test_uuid = str(uuid.uuid4()).encode()

        # clean serial ports
        self.__serial1.flushInput()
        self.__serial1.flushOutput()
        self.__serial2.flushInput()
        self.__serial2.flushOutput()
        # send the uuid through serial port
        self.__serial1.write(test_uuid)
        time.sleep(0.05)  # there might be a small delay
        if self.__serial2.inWaiting() == 0:
            self.fail("failed: port {} wait timeout exceded".format(self.__port2))
        else:
            if self.__serial2.readline() != test_uuid:
                self.fail("failed: port {} write/read mismatch".format(self.__port2))

        time.sleep(0.05)  # there might be a small delay

        # clean serial ports
        self.__serial1.flushInput()
        self.__serial1.flushOutput()
        self.__serial2.flushInput()
        self.__serial2.flushOutput()
        # send the uuid through serial port
        self.__serial2.write(test_uuid)
        time.sleep(0.05)  # there might be a small delay
        if self.__serial1.inWaiting() == 0:
            self.fail("failed: port {} wait timeout exceded".format(self.__port1))
        else:
            if self.__serial1.readline() != test_uuid:
                self.fail("failed: port {} write/read mismatch".format(self.__port1))

    def getresults(self):
        # resultlist is a python list of python dictionaries
        resultlist = []
        return resultlist