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#!/usr/bin/python
#

# Copyright (C) 2006, 2007 Google Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# 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., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.


import sys
from optparse import make_option

from ganeti.cli import *
from ganeti import opcodes
from ganeti import logger
from ganeti import objects
from ganeti import utils
from ganeti import errors

def ListOS(opts, args):
  """List the OSes existing on this node.

  """
  op = opcodes.OpDiagnoseOS()
  result = SubmitOpCode(op)

  if not result:
    logger.ToStdout("Can't get the OS list")
    return 1

  # filter non-valid OS-es
  oses = {}
  for node_name in result:
    oses[node_name] = [obj for obj in result[node_name]
                       if isinstance(obj, objects.OS)]

  fnode = oses.keys()[0]
  os_set = set([os_inst.name for os_inst in oses[fnode]])
  del oses[fnode]
  for node in oses:
    os_set &= set([os_inst.name for os_inst in oses[node]])

  format = "%s"

  if not opts.no_headers:
    logger.ToStdout(format % 'Name')

  for os_name in os_set:
    logger.ToStdout(format % os_name)

  return 0

def DiagnoseOS(opts, args):
  """Analyse all OSes on this cluster.

  """
  op = opcodes.OpDiagnoseOS()
  result = SubmitOpCode(op)

  if not result:
    logger.ToStdout("Can't get the OS list")
    return 1

  format = "%-*s %-*s %s"

  node_data = result
  all_os = {}
  for node_name in node_data:
    nr = node_data[node_name]
    if nr:
      for obj in nr:
        if isinstance(obj, objects.OS):
          os_name = obj.name
        else:
          os_name = obj.args[0]
        if os_name not in all_os:
          all_os[os_name] = {}
        all_os[os_name][node_name] = obj

  max_name = len('Name')
  if all_os:
    max_name = max(max_name, max([len(name) for name in all_os]))

  max_node = len('Status/Node')
  max_node = max(max_node, max([len(name) for name in node_data]))

  logger.ToStdout(format % (max_name, 'Name', max_node, 'Status/Node',
                            'Details'))

  for os_name in all_os:
    nodes_valid = []
    nodes_bad = {}
    for node_name in node_data:
      nos = all_os[os_name].get(node_name, None)
      if isinstance(nos, objects.OS):
        nodes_valid.append(node_name)
      elif isinstance(nos, errors.InvalidOS):
        nodes_bad[node_name] = nos.args[1]
      else:
        nodes_bad[node_name] = "os dir not found"

    if nodes_valid and not nodes_bad:
      status = "valid"
    elif not nodes_valid and nodes_bad:
      status = "invalid"
    else:
      status = "partial valid"
    logger.ToStdout(format % (max_name, os_name, max_node, status, ""))
    nodes_valid = utils.NiceSort(nodes_valid)
    for node_name in nodes_valid:
      logger.ToStdout(format % (max_name, "", max_node, node_name, "valid"))
    nbk = utils.NiceSort(nodes_bad.keys())
    for node_name in nbk:
      logger.ToStdout(format % (max_name, "", max_node,
                                node_name, nodes_bad[node_name]))


commands = {
  'list': (ListOS, ARGS_NONE, [DEBUG_OPT, NOHDR_OPT], "",
           "Lists all valid OSes on the master"),
  'diagnose': (DiagnoseOS, ARGS_NONE, [DEBUG_OPT], "",
               "Diagnose all OSes"),
  }

if __name__ == '__main__':
  retcode = GenericMain(commands)
  sys.exit(retcode)