#!/bin/env python

import os
os.environ['DJANGO_SETTINGS_MODULE'] = 'Bcfg2.settings'

import lxml.etree
import sys
import Bcfg2.Options

from Bcfg2.Server.Plugins.Metadata import MetadataClientModel
from Bcfg2.Server.Plugins.Probes import ProbesGroupsModel

def migrate(xclient):
    client_name = xclient.get('name')
    try:
        try:
            client = MetadataClientModel.objects.get(hostname=client_name)
        except MetadataClientModel.DoesNotExist:
            client = MetadataClientModel(hostname=client_name)
            client.save()
    except:
        print("Failed to migrate client %s" % (client))
        return False

    try:
        cgroups = []
        for xgroup in xclient.findall('Group'):
            group_name = xgroup.get('name')
            cgroups.append(group_name)
            try:
                group = ProbesGroupsModel.objects.get(hostname=client_name, group=group_name)
            except ProbesGroupsModel.DoesNotExist:
                group = ProbesGroupsModel(hostname=client_name, group=group_name)
                group.save()

        ProbesGroupsModel.objects.filter(
            hostname=client.hostname).exclude(
            group__in=cgroups).delete()

    except:
        print("Failed to migrate groups")
        return False
    return True

def main():
    opts = dict(repo=Bcfg2.Options.SERVER_REPOSITORY)
    setup = Bcfg2.Options.OptionParser(opts)
    setup.parse(sys.argv[1:])

    probefile = os.path.join(setup['repo'], 'Probes', "probed.xml")

    try:
        xdata = lxml.etree.parse(probefile)
    except lxml.etree.XMLSyntaxError:
        err = sys.exc_info()[1]
        print("Could not parse %s, skipping: %s" % (probefile, err))
    
    for xclient in xdata.findall('Client'):
        print "Migrating Metadata and Probe groups for %s" % xclient.get('name')
        migrate(xclient)

if __name__ == '__main__':
    sys.exit(main())