#!/usr/bin/python

"""
call func method invoker

Copyright 2007, Red Hat, Inc
see AUTHORS

This software may be freely redistributed under the terms of the GNU
general public license.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
"""


import optparse
import pprint
import xmlrpclib

from func.overlord import command
from func.overlord import client

DEFAULT_PORT = 51234

class Call(client.command.Command):
    name = "call"
    useage = "call nodule method name arg1 arg2..."
    def addOptions(self):
        self.parser.add_option("-v", "--verbose", dest="verbose",
                               action="store_true")
        self.parser.add_option("-x", "--xmlrpc", dest="xmlrpc",
                               help="output return data in XMLRPC format",
                               action="store_true")
        self.parser.add_option("", "--raw", dest="rawprint",
                               help="output return data using Python print",
                               action="store_true")
        self.parser.add_option("-j", "--json", dest="json",
                               help="output return data using JSON",
                               action="store_true")
        self.parser.add_option("-p", "--port", dest="port",
                               default=DEFAULT_PORT)

    def handleOptions(self, options):
        self.options = options

        self.verbose = options.verbose
        self.port = options.port

        # I'm not really a fan of the "module methodname" approach
        # but we'll keep it for now -akl

    def parse(self, argv):
        self.argv = argv

        return command.Command.parse(self, argv)
        

    def format_return(self, data):
        """
        The call module supports multiple output return types, the default is pprint.
        """
        
        if self.options.xmlrpc:
            return xmlrpclib.dumps((data,""))

        if self.options.json:
            try:
                import simplejson
                return simplejson.dumps(data)
            except ImportError:
                print "WARNING: json support not found, install python-simplejson"
                return data

        if self.options.rawprint:
            return data
            
        return pprint.pformat(data)

    def do(self, args):

        # I'm not really a fan of the "module methodname" approach
        # but we'll keep it for now -akl

        # I kind of feel like we shouldn't be parsing args here, but I'm
        # not sure what the write place is -al;
        self.module      = args[0]
        self.method      = args[1]
        self.method_args = args[2:]

        # this could get weird, sub sub classes might be calling this
        # this with multiple.parentCommand.parentCommands...
        # maybe command.py needs a way to set attrs on subCommands?
        # or some sort of shared datastruct?
        self.server_spec = self.parentCommand.server_spec

        client_obj = client.Client(self.server_spec,port=self.port,interactive=True,
            verbose=self.verbose, config=self.config)
        results = client_obj.run(self.module, self.method, self.method_args)

        # TO DO: add multiplexer support
        # probably as a higher level module.

        # dump the return code stuff atm till we figure out the right place for it
        return self.format_return(results)