##
# Geniwrapper Configuration Info
#
# This module holds configuration parameters for geniwrapper. There are two
# main pieces of information that are used: the database connection and
# the PLCAPI connection
##

##
# Geniwrapper uses a MYSQL database to store records. This database may be
# co-located with the PLC database, or it may be a separate database. The
# following parameters define the connection to the database.
#
# Note that Geniwrapper does not access any of the PLC databases directly via
# a mysql connection; All PLC databases are accessed via PLCAPI.

import os
import sys

# If we have been checked out into a directory at the same
# level as myplc, where plc_config.py lives. If we are in a
# MyPLC environment, plc_config.py has already been installed
# in site-packages.
myplc = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))) + \
        os.sep + "myplc"

class Config:
    """
    Parse the bash/Python/PHP version of the configuration file. Very
    fast but no type conversions.
    """

    def __init__(self, file = "/usr/share/geniwrapper/util/geni_config"):
        # Load plc_config

	loaded = False
	path = os.path.dirname(os.path.abspath(__file__))
	filename = file.split(os.sep)[-1]
	alt_file = path + os.sep + filename
	myplc_file = myplc + os.sep + filename
	files = [file, alt_file, myplc_file]

	for file in files:
	    try: 
		execfile(file, self.__dict__)
		loaded = True
	    except:
	        pass

	if not loaded:
	    raise Exception, "Could not find config in " + ", ".join(files)


    def load(self, file):
	try:
	    execfile(file, self.__dict__)
	except:
	    raise Exception, "Could not find config in " + file

plcConfig = Config("/etc/planetlab/plc_config")

def get_default_dbinfo():
    dbinfo={ 'dbname' : plcConfig.PLC_DB_NAME,
    'address' : plcConfig.PLC_DB_HOST,
    'port' : plcConfig.PLC_DB_PORT,
    'user' : plcConfig.PLC_DB_USER,
    'password' : plcConfig.PLC_DB_PASSWORD
	}

    return dbinfo

##
# Geniwrapper uses a PLCAPI connection to perform operations on the registry,
# such as creating and deleting slices. This connection requires an account
# on the PLC server with full administrator access.
#
# The Url parameter controls whether the connection uses PLCAPI directly (i.e.
# Geniwrapper is located on the same machine as PLC), or uses a XMLRPC connection
# to the PLC machine. If you wish to use the API directly, then remove the Url
# field from the dictionary. 

def get_pl_auth():
    pl_auth = {'Username': plcConfig.PLC_API_MAINTENANCE_USER,
    'AuthMethod': 'capability',
    'AuthString':  plcConfig.PLC_MAINTENANCE_PASSWORD,
    "Url": 'https://%s:%s%s' %(plcConfig.PLC_API_HOST, plcConfig.PLC_API_PORT, plcConfig.PLC_API_PATH)
    }

    return pl_auth