#! /usr/bin/env python
# -*- coding: utf-8 -*-
import socket, sys , hashlib, struct

unpacker = struct.Struct('6s 6s')
packer = struct.Struct('6s 6s')
server_address = ('localhost', 10000)

#File open and output
filename1='text1.txt'
f1 = open(filename1,'r')
text1 = f1.read()
filename2='text2.txt'
f2 = open(filename2,'r')
text2 = f2.read()

print '=========================================='
print 'Text1 is :'
print text1
print '========================================='
print 'Text2 is :'
print text2
print '=========================================\n'

#Hash creation and output
h = hashlib.sha1()

h.update(text1)
hash_text1_client= h.hexdigest()

h.update(text2)
hash_text2_client= h.hexdigest()

print '=========================================='
print 'Hash for Text1 is :'
print hash_text1_client
print '========================================='
print 'Hash for Text2 is :'
print hash_text2_client
print '=========================================\n'

#Connection with the server
print >>sys.stderr, 'Trying to connect to %s:%s' % server_address
try:
  sock_auth = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  sock_auth.connect(server_address)
except:
  print 'Could not connect to the server.'
  sys.exit(0)

print 'Connection Successful.'

#Auth step
authenticated_successfully="False"
kicked_out="False"

while  ( authenticated_successfully !="True" ) :
  input_username=raw_input('Enter your username :')
  input_password=raw_input('Enter your password :')
  input_credentials = (input_username,input_password)
  input_packed_data = packer.pack(*input_credentials)
  sock_auth.sendall(input_packed_data)
  authenticated_successfully=sock_auth.recv(4)
  kicked_out=sock_auth.recv(4)
  if (kicked_out=="True") :
    sys.exit(0)

sock_auth.close()

try:
  sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  sock.connect(server_address)
  sock.sendall(text1)
  sock.close()

  sock2 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  sock2.connect(server_address)
  sock2.sendall(text2)
  sock2.close()

  sock_hash = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  sock_hash.connect(server_address)
  sock_hash.sendall(hash_text1_client)
  sock_hash.sendall(hash_text2_client)
  sock_hash.close()

  sock3 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  sock3.connect(server_address)
  result=''
  while True:
    data = sock3.recv(16)
    print >>sys.stderr, 'Received "%s" from data1' % result
    if data:
      result+=data
    else:
      break
  print 'Data Received Successfully.\n'
  print result
finally:
  print 'All done \n'