import types
import errno
import sys
import telnetlib
import time
import socket
import sys
import fcntl
from FiberHome import FiberHome
from Furukawa import Furukawa
from Huawei import Huawei
from ZTE import ZTE
from OLTBase import OLTBase
from ObjectConnection import ObjectConnection


class ObjectTelnet(ObjectConnection):

    def __init__(self):
        ObjectConnection.__init__(self)
        self.tn = None
        self.debug = False

    def connect(self):
        """
        Connect by telnet to olt
        """
        if self.brand.upper() == ZTE.__name__.upper():
            self.olt = ZTE(self.model, False)
        elif self.brand.upper() == FiberHome.__name__.upper():
            self.olt = FiberHome(self.model, False)
        elif self.brand.upper() == Furukawa.__name__.upper():
            self.olt = Furukawa(self.model, False)
        elif self.brand.upper() == Huawei.__name__.upper():
            self.olt = Huawei(self.model, False)
        else:
            self.olt = OLTBase(None, False)
        print("Telnet client ...\n")
        f = open("/var/lock/" + self.hostname, "w")
        print("Open lock file\n")
        fcntl.flock(f, fcntl.LOCK_EX)
        print("Lock Acquire\n")
        print("Login in...\n")
        try:
            self.tn = telnetlib.Telnet(self.hostname, self.port, self.timeout)
            if self.debug:
                self.tn.set_debuglevel(1)
            error = self.read_data([self.olt.get_expected_name()])
            if error != -1:
                self.tn.write(self.user + self.NEW_LINE_UNIX)
                error = self.read_data([self.olt.get_expected_password()])
                if error != -1:
                    self.tn.write(self.password + self.NEW_LINE_UNIX)
                    print("Logged in...\n")
                    print self.tn.read_very_lazy()
                    cardinal = self.olt.get_expected_cardinal()
                    if isinstance(cardinal, list):
                        read_data_list = cardinal
                    else:
                        read_data_list = [cardinal]
                    error = self.read_data(read_data_list)
                    if error != -1:
                        if self.file_name is not None:
                            self.connection_file()
                        elif self.data is not None:
                            self.connection_data()
                        else:
                            self.connection_old()
                        print("-----FIN-----")
                        nc = 0
                        while self.QUIT:
                            if nc == 20:
                                self.QUIT = False
                            # send quit to terminal until exit confirmation
                            self.command_quit(self.olt.get_write_exit())
                            nc += 1
                        self.tn.close()
                        self.save_log()
                        exit(self.RUN_OK)
            exit(self.RUN_ERROR)
        except socket.error:
            sys.exit("Timeout Except")

    def connection_old(self):
        """
        Old method
        """
        while 1:
            line = sys.stdin.readline()
            if not line:
                break
            print(self.tn.read_until(self.olt.get_expected_cardinal()))
            time.sleep(1)

    def connection_data(self):
        """
        Recive data separeted by ;
        """
        # $(sed ':a;N;$!ba;s/\n/;/g' file)
        content = self.data.split(";")
        for line in content:
            self.command_execute(line, self.olt.get_expected_cardinal())

    def connection_file(self):
        """
        Execute command from file
        """
        with open(self.file_name) as f:
            content = f.readlines()
            for line in content:
                self.command_execute(line, self.olt.get_expected_cardinal())

    def command_enable(self, command):
        """
        Check's if the command is enable and execute then
        :param command:
        :return: Return True if enable otherwise False
        """
        if command.lower() == self.olt.get_write_enable().lower():
            if self.olt.run_enable():
                self.tn.write(self.olt.get_write_enable() + self.NEW_LINE_UNIX)
                if self.olt.run_enable_password():
                    self.read_data([self.olt.get_expected_enable_password()])
                    self.tn.write(self.password_enable + self.NEW_LINE_UNIX)
                cardinal = self.olt.get_expected_cardinal()
                if isinstance(cardinal, list):
                    read_data_list = cardinal
                else:    
                    read_data_list = [cardinal]
                self.read_data(read_data_list)
            return True
        return False

    def command_quit(self, command):
        """
        Check's if the command is quit and execute then
        :param command:
        :return: Return True if enable otherwise False
        """
        if command.lower() == self.olt.get_write_exit().lower():
            try:
                self.tn.write(self.olt.get_write_exit() + self.NEW_LINE_UNIX)
                read_data = None
                with_confirmation = False
                if self.olt.get_expected_exit() is not None:
                    cardinal = self.olt.get_expected_cardinal()
                    if isinstance(cardinal, list):
                        read_data = cardinal + [self.olt.get_expected_exit()]
                    else:    
                        read_data = [cardinal, self.olt.get_expected_exit()]
                    with_confirmation = True
                if self.olt.get_expected_exit_with_confirmation() is not None:
                    cardinal = self.olt.get_expected_cardinal()
                    if isinstance(cardinal, list):
                        read_data = cardinal + [self.olt.get_expected_exit_with_confirmation()]
                    else:    
                        read_data = [cardinal, self.olt.get_expected_exit_with_confirmation()]
                    with_confirmation = False
                if read_data is not None:
                    position = self.read_data(read_data)
                    if position == 2:
                        # quit terminal
                        if with_confirmation:
                            self.tn.write(self.olt.get_write_exit_confirmation() + self.NEW_LINE_UNIX)
                        self.QUIT = False
            # except self.tn.error, e:
            except IOError, e:
                if e.errno == errno.EPIPE:
                    self.QUIT = False
            return True
        return False

    def command_execute(self, command, expected):
        """
        Check's the command
        :param command:
        :param expected: Expected string to stop listening
        """
        self.command_print(command)
        command = command.strip()
        if "\\n" in command and (len(command) == 4 or len(command) == 2):
            print "Sending ENTER \\r\\n"
            command = '\r\n'
        else:
            command = command.rstrip(self.NEW_LINE_WINDOWS).rstrip(self.NEW_LINE_UNIX)
        if not self.command_enable(command) and not self.command_quit(command):
            if command.__len__() > 0:
                if self.debug:
                    print "Send: "
                    print command
                self.tn.write(command + self.NEW_LINE_UNIX)
                self.read_data(expected)

    def read_data(self, expected):
        """
        Read channel waiting parameter character
        :param expected: List of expected string
        """
        iteration = 0
        position = -1
        if isinstance(expected, types.StringType):
            expected = [expected]
        while iteration < 6:
            try:
                (i, obj, all_data) = self.tn.expect(expected, 10)
                nc = 1
                for ch in expected:
                    if ch in all_data:
                        position = nc
                        break
                    nc += 1
                if position == -1:
                    iteration += 1
                else:
                    iteration = 6
                    print(str(all_data))
                    self.all_data = self.all_data + str(all_data)
            except EOFError as error:
                iteration = 6
        return position