import ConfigParser, os, md5, rotor
KEY='pyljclient'
CONFIG_FILE = 'pyljclient.conf'
ITEMS = {'item_a':'client_name',
	    'item_b':'client_version'}
R_ITEMS = {'client_name':'item_a',
	    'client_version':'item_b'}

def initialize():
    clientParser = ConfigParser.ConfigParser()
    clientParser.add_section('GLOBAL')
    clientParser.set('GLOBAL',R_ITEMS['client_name'],encrypt('pyljclient'))
    clientParser.set('GLOBAL',R_ITEMS['client_version'],encrypt('0.3.0'))
    fd = open(os.path.join(os.getcwd(),CONFIG_FILE), 'w')
    clientParser.write(fd)
    fd.close()

def encrypt(item):
    return rotor.newrotor(KEY).encrypt(item)

def decrypt(item):
    return rotor.newrotor(KEY).decrypt(item)

def update(option, value, section='GLOBAL'):
    clientParser = readConfig()
    if option not in R_ITEMS.keys():
	raise "no such option exists"
    else:
	option_key = R_ITEMS[option]
    clientParser.set(section, option_key, encrypt(value))
    fd = open(os.path.join(os.getcwd(),CONFIG_FILE), 'w')
    clientParser.write(fd)
    fd.close()

def readConfig():
    clientParser = ConfigParser.ConfigParser()
    config_file = os.path.join(os.getcwd(),CONFIG_FILE)
    if not os.path.exists(config_file):
	initialize()
    clientParser.read(config_file)
    return clientParser

def getOption(option, section='GLOBAL'):
    clientParser = readConfig()
    item = clientParser.get(section, R_ITEMS[option])
    decrypted_item = decrypt(item)
    print "getOption decrypted item...:",decrypted_item
    return decrypted_item

def printGlobals():
    config = readConfig()
    print "Name -->", getClientName()
    print "Version -->", getClientVersion()

#-----------------
def getClientName():
    return getOption('client_name')

def getClientVersion():
    return getOption('client_version')