import sys
import telnetlib
import getpass
import time
import os
import webbrowser
#function  credential file
#read only the file (credfile) line by line and return 2 values (user, password)
def credent(credfile):
    cred = open(credfile, 'r')
    user = cred.readline().rstrip('\n')
    password = cred.readline().rstrip('\n')
    cred.close
    print(user)
    print(password)
    return (user, password)
#function device file
#reads only the file (devicefile) line by line and returns all the values
def device(devicefile):
    with open(devicefile, 'r') as devicelist:
        hostlist=devicelist.readlines()
        return hostlist
#function device ping
def pingdevice():
#ask the operator to input devicefile name (without the extension txt)
    devicefile = input('enter filewith devices : ')
    hostlist = device(devicefile + ".txt")
#create a list (hostel) where it will put the ips that can be pinged
    hostel = []
#each ip tested 1 by 1 if it can be pinged
    for host in hostlist:
        print(host)
        print(hostlist)
        print('ping -n 3 -w 500 ' + host)

        response = os.system('ping -n 2 -w 200 ' + host)
        if response != 0:
            pingstatus = "Network Error"
            print(pingstatus)
            continue
        else:
            pingstatus = "Network Active"
            print(pingstatus)
            print(host)
            print(hostlist)
#append every ip that can be pinged
            hostel.append(host);
    return hostel

#execute device ping
#pingdevice()
#function telnet
def telnetdevice():
#asks the operator to give the credential file name
    credentfile = input('enter filewith credential : ')
#call the funcion pingdevice in order to take the list of ips that can be pinged
    hostlist = pingdevice()
    print(hostlist)
#call the credent function to take the user and password
    (user, password) = credent(credentfile + ".txt")
#    devicefile = input('enter filewith devices : ')
#    hostlist = device(devicefile + ".txt")
    for host in hostlist:
        print(host)
        print(hostlist)
        try:
            tn = telnetlib.Telnet(host.rstrip('\n'),23,20)
        except:
            print("host unreachable" + host)
            continue

#           if timer exceeds jump to the next step
        # do the telnet with the ip from
        tn.read_until(b'sername: ')
        #tn.write(user.encode('ascii'))
        tn.write(user.encode('ascii') + b"\n")
        tn.read_until(b'assword: ')
        #tn.write(password.encode('ascii'))
        tn.write(password.encode('ascii') + b"\n")
        tn.read_until(b'#')
        tn.write(b'term length 0 \n')
        tn.read_until(b'#')
        tn.write(b'show interface description | e BE\n')
        tn.read_until(b'#')
        tn.write(b'show run\n')
        tn.write(b"exit \n")
        output = tn.read_all().decode('ascii')
        op=open ("output.txt", "a")
        op.write(output)
        print("writing to file")
        op.close()
        print(output)
        tn.close
   #    while not _is_eof(host):
   #     host1 = host.readline()
   #     tn = telnetlib.Telnet(host)

#cred = open('credentialstel.txt', 'r')
#host1 = input('enter ip : ')
#user = cred.readline().rstrip('\n')
#password = cred.readline().rstrip('\n')
#tn = telnetlib.Telnet(host1)
telnetdevice()