"""
Methods related to application interaction

"""


def __init__( self ):
    self.ip = '127.0.0.1'

def activate( apps, nodeToActivateFrom=0 ):
    """
    Activate specified applications from node specified

    Ex) apps = ['metrics', 'fwd']
        nodeToActivateFrom = range( 0, nodes )
    """
    if isinstance( apps, ( int, basestring ) ):
        main.log.error( 'Please pass in a list of strings for args' )
        return main.FALSE

    if not isinstance( nodeToActivateFrom, ( int ) ) or \
            nodeToActivateFrom < 0:
        main.log.error( 'Incorrect node specified' )
        return main.FALSE

    # TODO: Start log capture and listen for exceptions
    #       and errors. Also investigate possible keywords
    #       to listen for when activating applications
    

    for app in apps:
        # Check if app str in appList is in the main scope
        # definition main.appList
        if app not in main.appList:
            main.log.error( 'Invalid app name given' )
            return main.FALSE
     
        try:
            # NOTE: assumes node 1 is always activating application
            appOutput = main.CLIs[nodeToActivateFrom].activateApp( 
                main.appList[app] ) 
        except KeyError:
            main.log.error( 'There was an error with the key '+
                    str(app) + '. Check the appList dictionary' )
            return main.FALSE
        except Exception:
            main.log.error( 'Uncaught exception error while ' +
                    'activating applications: ' + str(app) )
            return main.FALSE

    return main.TRUE

def deactivate( apps, nodeToDeactivateFrom=0 ):
    """
    Deactivate specified applications from node specified

    """
    main.log.report( 'deactivate implment me' )

def isAppInstallSuccess():
    """
    Check the app list across clusters to determine
    that apps have been installed successfully

    """

    main.log.report( 'isAppInstallSuccess implement me' )