#!/usr/bin/env python

from dm.common.cli.dmRestCli import DmRestCli
from dm.common.utility.configurationManager import ConfigurationManager

class DmRestSessionCli(DmRestCli):
    """ Base dm session cli class. """

    def __init__(self, validArgCount=0):
        DmRestCli.__init__(self, validArgCount)
        self.username = None
        self.password = None

        loginGroup = 'Login Options'
        self.addOptionGroup(loginGroup, None)
        self.addOptionToGroup(loginGroup, '', '--login-username', dest='loginUsername', help='Login username.')
        self.addOptionToGroup(loginGroup, '', '--login-password', dest='loginPassword', help='Login password.')
        self.addOptionToGroup(loginGroup, '', '--login-file', dest='loginFile', help='Login file, contains "<login username>|<login password>" pair. It can be specified using DM_LOGIN_FILE environment variable. This option cannot be used with --login-username and --login-password options.')

    def parseArgs(self, usage=None):
        DmRestCli.parseArgs(self, usage)
        self.loginUsername = self.options.loginUsername
        self.loginPassword = self.options.loginPassword
        self.loginFile = self.options.loginFile
        self.parseLoginFile()
        return (self.options, self.args)

    def getLoginUsername(self):
        return self.loginUsername

    def getLoginPassword(self):
        return self.loginPassword

    def getLoginFile(self):
        if not self.loginFile:
            configManager = ConfigurationManager.getInstance()
            self.loginFile = configManager.getLoginFile()
        return self.loginFile

    def parseLoginFile(self):
        if self.getLoginFile() and not self.getLoginUsername() and not self.getLoginPassword():
            try:
                # Assume form <username>|<password>
                tokenList = open(self.loginFile).readline().split('|')
                if len(tokenList) == 2:
                    self.loginUsername = tokenList[0].strip()
                    self.loginPassword = tokenList[1].strip()
            except:
                # Ignore invalid login file
                pass

    def hasCredentials(self):
        return (self.getLoginUsername() != None and self.getLoginPassword() != None)

#######################################################################
# Testing

if __name__ == '__main__':
        pass