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#

# Copyright (C) 2006, 2007, 2010, 2011 Google Inc.

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# 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.

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# 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.

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# 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.

"""Debugging commands"""

# pylint: disable-msg=W0401,W0614,C0103

# W0401: Wildcard import ganeti.cli

# W0614: Unused import %s from wildcard import (since we need cli)

# C0103: Invalid name gnt-backup

import simplejson

import time

import socket

import logging

from ganeti.cli import *

from ganeti import cli

from ganeti import constants

from ganeti import opcodes

from ganeti import utils

from ganeti import errors

from ganeti import compat

#: Default fields for L{ListLocks}

_LIST_LOCKS_DEF_FIELDS = [

  "name",

  "mode",

  "owner",

  "pending",

  ]

def Delay(opts, args):

  """Sleeps for a while

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should contain only one element, the duration

      the sleep

  @rtype: int

  @return: the desired exit code

  """

  delay = float(args[0])

  op = opcodes.OpTestDelay(duration=delay,

                           on_master=opts.on_master,

                           on_nodes=opts.on_nodes,

                           repeat=opts.repeat)

  SubmitOpCode(op, opts=opts)

  return 0

def GenericOpCodes(opts, args):

  """Send any opcode to the master.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should contain only one element, the path of

      the file with the opcode definition

  @rtype: int

  @return: the desired exit code

  """

  cl = cli.GetClient()

  jex = cli.JobExecutor(cl=cl, verbose=opts.verbose, opts=opts)

  job_cnt = 0

  op_cnt = 0

  if opts.timing_stats:

    ToStdout("Loading...")

  for job_idx in range(opts.rep_job):

    for fname in args:

      # pylint: disable-msg=W0142

      op_data = simplejson.loads(utils.ReadFile(fname))

      op_list = [opcodes.OpCode.LoadOpCode(val) for val in op_data]

      op_list = op_list * opts.rep_op

      jex.QueueJob("file %s/%d" % (fname, job_idx), *op_list)

      op_cnt += len(op_list)

      job_cnt += 1

  if opts.timing_stats:

    t1 = time.time()

    ToStdout("Submitting...")

  jex.SubmitPending(each=opts.each)

  if opts.timing_stats:

    t2 = time.time()

    ToStdout("Executing...")

  jex.GetResults()

  if opts.timing_stats:

    t3 = time.time()

    ToStdout("C:op     %4d" % op_cnt)

    ToStdout("C:job    %4d" % job_cnt)

    ToStdout("T:submit %4.4f" % (t2-t1))

    ToStdout("T:exec   %4.4f" % (t3-t2))

    ToStdout("T:total  %4.4f" % (t3-t1))

  return 0

def TestAllocator(opts, args):

  """Runs the test allocator opcode.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should contain only one element, the iallocator name

  @rtype: int

  @return: the desired exit code

  """

  try:

    disks = [{

      constants.IDISK_SIZE: utils.ParseUnit(val),

      constants.IDISK_MODE: constants.DISK_RDWR,

      } for val in opts.disks.split(",")]

  except errors.UnitParseError, err:

    ToStderr("Invalid disks parameter '%s': %s", opts.disks, err)

    return 1

  nics = [val.split("/") for val in opts.nics.split(",")]

  for row in nics:

    while len(row) < 3:

      row.append(None)

    for i in range(3):

      if row[i] == '':

        row[i] = None

  nic_dict = [{

    constants.INIC_MAC: v[0],

    constants.INIC_IP: v[1],

    # The iallocator interface defines a "bridge" item

    "bridge": v[2],

    } for v in nics]

  if opts.tags is None:

    opts.tags = []

  else:

    opts.tags = opts.tags.split(",")

  op = opcodes.OpTestAllocator(mode=opts.mode,

                               name=args[0],

                               evac_nodes=args,

                               instances=args,

                               mem_size=opts.mem,

                               disks=disks,

                               disk_template=opts.disk_template,

                               nics=nic_dict,

                               os=opts.os,

                               vcpus=opts.vcpus,

                               tags=opts.tags,

                               direction=opts.direction,

                               allocator=opts.iallocator,

                               reloc_mode=opts.reloc_mode,

                               target_groups=opts.target_groups)

  result = SubmitOpCode(op, opts=opts)

  ToStdout("%s" % result)

  return 0

def _TestJobSubmission(opts):

  """Tests submitting jobs.

  """

  ToStdout("Testing job submission")

  testdata = [

    (0, 0, constants.OP_PRIO_LOWEST),

    (0, 0, constants.OP_PRIO_HIGHEST),

    ]

  for priority in (constants.OP_PRIO_SUBMIT_VALID |

                   frozenset([constants.OP_PRIO_LOWEST,

                              constants.OP_PRIO_HIGHEST])):

    for offset in [-1, +1]:

      testdata.extend([

        (0, 0, priority + offset),

        (3, 0, priority + offset),

        (0, 3, priority + offset),

        (4, 2, priority + offset),

        ])

  cl = cli.GetClient()

  for before, after, failpriority in testdata:

    ops = []

    ops.extend([opcodes.OpTestDelay(duration=0) for _ in range(before)])

    ops.append(opcodes.OpTestDelay(duration=0, priority=failpriority))

    ops.extend([opcodes.OpTestDelay(duration=0) for _ in range(after)])

    try:

      cl.SubmitJob(ops)

    except errors.GenericError, err:

      if opts.debug:

        ToStdout("Ignoring error: %s", err)

    else:

      raise errors.OpExecError("Submitting opcode with priority %s did not"

                               " fail when it should (allowed are %s)" %

                               (failpriority, constants.OP_PRIO_SUBMIT_VALID))

    jobs = [

      [opcodes.OpTestDelay(duration=0),

       opcodes.OpTestDelay(duration=0, dry_run=False),

       opcodes.OpTestDelay(duration=0, dry_run=True)],

      ops,

      ]

    result = cl.SubmitManyJobs(jobs)

    if not (len(result) == 2 and

            compat.all(len(i) == 2 for i in result) and

            compat.all(isinstance(i[1], basestring) for i in result) and

            result[0][0] and not result[1][0]):

      raise errors.OpExecError("Submitting multiple jobs did not work as"

                               " expected, result %s" % result)

    assert len(result) == 2

  ToStdout("Job submission tests were successful")

class _JobQueueTestReporter(cli.StdioJobPollReportCb):

  def __init__(self):

    """Initializes this class.

    """

    cli.StdioJobPollReportCb.__init__(self)

    self._expected_msgcount = 0

    self._all_testmsgs = []

    self._testmsgs = None

    self._job_id = None

  def GetTestMessages(self):

    """Returns all test log messages received so far.

    """

    return self._all_testmsgs

  def GetJobId(self):

    """Returns the job ID.

    """

    return self._job_id

  def ReportLogMessage(self, job_id, serial, timestamp, log_type, log_msg):

    """Handles a log message.

    """

    if self._job_id is None:

      self._job_id = job_id

    elif self._job_id != job_id:

      raise errors.ProgrammerError("The same reporter instance was used for"

                                   " more than one job")

    if log_type == constants.ELOG_JQUEUE_TEST:

      (sockname, test, arg) = log_msg

      return self._ProcessTestMessage(job_id, sockname, test, arg)

    elif (log_type == constants.ELOG_MESSAGE and

          log_msg.startswith(constants.JQT_MSGPREFIX)):

      if self._testmsgs is None:

        raise errors.OpExecError("Received test message without a preceding"

                                 " start message")

      testmsg = log_msg[len(constants.JQT_MSGPREFIX):]

      self._testmsgs.append(testmsg)

      self._all_testmsgs.append(testmsg)

      return

    return cli.StdioJobPollReportCb.ReportLogMessage(self, job_id, serial,

                                                     timestamp, log_type,

                                                     log_msg)

  def _ProcessTestMessage(self, job_id, sockname, test, arg):

    """Handles a job queue test message.

    """

    if test not in constants.JQT_ALL:

      raise errors.OpExecError("Received invalid test message %s" % test)

    sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)

    try:

      sock.settimeout(30.0)

      logging.debug("Connecting to %s", sockname)

      sock.connect(sockname)

      logging.debug("Checking status")

      jobdetails = cli.GetClient().QueryJobs([job_id], ["status"])[0]

      if not jobdetails:

        raise errors.OpExecError("Can't find job %s" % job_id)

      status = jobdetails[0]

      logging.debug("Status of job %s is %s", job_id, status)

      if test == constants.JQT_EXPANDNAMES:

        if status != constants.JOB_STATUS_WAITLOCK:

          raise errors.OpExecError("Job status while expanding names is '%s',"

                                   " not '%s' as expected" %

                                   (status, constants.JOB_STATUS_WAITLOCK))

      elif test in (constants.JQT_EXEC, constants.JQT_LOGMSG):

        if status != constants.JOB_STATUS_RUNNING:

          raise errors.OpExecError("Job status while executing opcode is '%s',"

                                   " not '%s' as expected" %

                                   (status, constants.JOB_STATUS_RUNNING))

      if test == constants.JQT_STARTMSG:

        logging.debug("Expecting %s test messages", arg)

        self._testmsgs = []

      elif test == constants.JQT_LOGMSG:

        if len(self._testmsgs) != arg:

          raise errors.OpExecError("Received %s test messages when %s are"

                                   " expected" % (len(self._testmsgs), arg))

    finally:

      logging.debug("Closing socket")

      sock.close()

def TestJobqueue(opts, _):

  """Runs a few tests on the job queue.

  """

  _TestJobSubmission(opts)

  (TM_SUCCESS,

   TM_MULTISUCCESS,

   TM_FAIL,

   TM_PARTFAIL) = range(4)

  TM_ALL = frozenset([TM_SUCCESS, TM_MULTISUCCESS, TM_FAIL, TM_PARTFAIL])

  for mode in TM_ALL:

    test_messages = [

      "Testing mode %s" % mode,

      "Hello World",

      "A",

      "",

      "B"

      "Foo|bar|baz",

      utils.TimestampForFilename(),

      ]

    fail = mode in (TM_FAIL, TM_PARTFAIL)

    if mode == TM_PARTFAIL:

      ToStdout("Testing partial job failure")

      ops = [

        opcodes.OpTestJqueue(notify_waitlock=True, notify_exec=True,

                             log_messages=test_messages, fail=False),

        opcodes.OpTestJqueue(notify_waitlock=True, notify_exec=True,

                             log_messages=test_messages, fail=False),

        opcodes.OpTestJqueue(notify_waitlock=True, notify_exec=True,

                             log_messages=test_messages, fail=True),

        opcodes.OpTestJqueue(notify_waitlock=True, notify_exec=True,

                             log_messages=test_messages, fail=False),

        ]

      expect_messages = 3 * [test_messages]

      expect_opstatus = [

        constants.OP_STATUS_SUCCESS,

        constants.OP_STATUS_SUCCESS,

        constants.OP_STATUS_ERROR,

        constants.OP_STATUS_ERROR,

        ]

      expect_resultlen = 2

    elif mode == TM_MULTISUCCESS:

      ToStdout("Testing multiple successful opcodes")

      ops = [

        opcodes.OpTestJqueue(notify_waitlock=True, notify_exec=True,

                             log_messages=test_messages, fail=False),

        opcodes.OpTestJqueue(notify_waitlock=True, notify_exec=True,

                             log_messages=test_messages, fail=False),

        ]

      expect_messages = 2 * [test_messages]

      expect_opstatus = [

        constants.OP_STATUS_SUCCESS,

        constants.OP_STATUS_SUCCESS,

        ]

      expect_resultlen = 2

    else:

      if mode == TM_SUCCESS:

        ToStdout("Testing job success")

        expect_opstatus = [constants.OP_STATUS_SUCCESS]

      elif mode == TM_FAIL:

        ToStdout("Testing job failure")

        expect_opstatus = [constants.OP_STATUS_ERROR]

      else:

        raise errors.ProgrammerError("Unknown test mode %s" % mode)

      ops = [

        opcodes.OpTestJqueue(notify_waitlock=True,

                             notify_exec=True,

                             log_messages=test_messages,

                             fail=fail)

        ]

      expect_messages = [test_messages]

      expect_resultlen = 1

    cl = cli.GetClient()

    cli.SetGenericOpcodeOpts(ops, opts)

    # Send job to master daemon

    job_id = cli.SendJob(ops, cl=cl)

    reporter = _JobQueueTestReporter()

    results = None

    try:

      results = cli.PollJob(job_id, cl=cl, reporter=reporter)

    except errors.OpExecError, err:

      if not fail:

        raise

      ToStdout("Ignoring error: %s", err)

    else:

      if fail:

        raise errors.OpExecError("Job didn't fail when it should")

    # Check length of result

    if fail:

      if results is not None:

        raise errors.OpExecError("Received result from failed job")

    elif len(results) != expect_resultlen:

      raise errors.OpExecError("Received %s results (%s), expected %s" %

                               (len(results), results, expect_resultlen))

    # Check received log messages

    all_messages = [i for j in expect_messages for i in j]

    if reporter.GetTestMessages() != all_messages:

      raise errors.OpExecError("Received test messages don't match input"

                               " (input %r, received %r)" %

                               (all_messages, reporter.GetTestMessages()))

    # Check final status

    reported_job_id = reporter.GetJobId()

    if reported_job_id != job_id:

      raise errors.OpExecError("Reported job ID %s doesn't match"

                               "submission job ID %s" %

                               (reported_job_id, job_id))

    jobdetails = cli.GetClient().QueryJobs([job_id], ["status", "opstatus"])[0]

    if not jobdetails:

      raise errors.OpExecError("Can't find job %s" % job_id)

    if fail:

      exp_status = constants.JOB_STATUS_ERROR

    else:

      exp_status = constants.JOB_STATUS_SUCCESS

    (final_status, final_opstatus) = jobdetails

    if final_status != exp_status:

      raise errors.OpExecError("Final job status is %s, not %s as expected" %

                               (final_status, exp_status))

    if len(final_opstatus) != len(ops):

      raise errors.OpExecError("Did not receive status for all opcodes (got %s,"

                               " expected %s)" %

                               (len(final_opstatus), len(ops)))

    if final_opstatus != expect_opstatus:

      raise errors.OpExecError("Opcode status is %s, expected %s" %

                               (final_opstatus, expect_opstatus))

  ToStdout("Job queue test successful")

  return 0

def ListLocks(opts, args): # pylint: disable-msg=W0613

  """List all locks.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should be an empty list

  @rtype: int

  @return: the desired exit code

  """

  selected_fields = ParseFields(opts.output, _LIST_LOCKS_DEF_FIELDS)

  def _DashIfNone(fn):

    def wrapper(value):

      if not value:

        return "-"

      return fn(value)

    return wrapper

  def _FormatPending(value):

    """Format pending acquires.

    """

    return utils.CommaJoin("%s:%s" % (mode, ",".join(threads))

                           for mode, threads in value)

  # Format raw values

  fmtoverride = {

    "mode": (_DashIfNone(str), False),

    "owner": (_DashIfNone(",".join), False),

    "pending": (_DashIfNone(_FormatPending), False),

    }

  while True:

    ret = GenericList(constants.QR_LOCK, selected_fields, None, None,

                      opts.separator, not opts.no_headers,

                      format_override=fmtoverride, verbose=opts.verbose)

    if ret != constants.EXIT_SUCCESS:

      return ret

    if not opts.interval:

      break

    ToStdout("")

    time.sleep(opts.interval)

  return 0

commands = {

  'delay': (

    Delay, [ArgUnknown(min=1, max=1)],

    [cli_option("--no-master", dest="on_master", default=True,

                action="store_false", help="Do not sleep in the master code"),

     cli_option("-n", dest="on_nodes", default=[],

                action="append", help="Select nodes to sleep on"),

     cli_option("-r", "--repeat", type="int", default="0", dest="repeat",

                help="Number of times to repeat the sleep"),

     DRY_RUN_OPT, PRIORITY_OPT,

     ],

    "[opts...] <duration>", "Executes a TestDelay OpCode"),

  'submit-job': (

    GenericOpCodes, [ArgFile(min=1)],

    [VERBOSE_OPT,

     cli_option("--op-repeat", type="int", default="1", dest="rep_op",

                help="Repeat the opcode sequence this number of times"),

     cli_option("--job-repeat", type="int", default="1", dest="rep_job",

                help="Repeat the job this number of times"),

     cli_option("--timing-stats", default=False,

                action="store_true", help="Show timing stats"),

     cli_option("--each", default=False, action="store_true",

                help="Submit each job separately"),

     DRY_RUN_OPT, PRIORITY_OPT,

     ],

    "<op_list_file...>", "Submits jobs built from json files"

    " containing a list of serialized opcodes"),

  'allocator': (

    TestAllocator, [ArgUnknown(min=1)],

    [cli_option("--dir", dest="direction", default=constants.IALLOCATOR_DIR_IN,

                choices=list(constants.VALID_IALLOCATOR_DIRECTIONS),

                help="Show allocator input (in) or allocator"

                " results (out)"),

     IALLOCATOR_OPT,

     cli_option("-m", "--mode", default="relocate",

                choices=list(constants.VALID_IALLOCATOR_MODES),

                help=("Request mode (one of %s)" %

                      utils.CommaJoin(constants.VALID_IALLOCATOR_MODES))),

     cli_option("--mem", default=128, type="unit",

                help="Memory size for the instance (MiB)"),

     cli_option("--disks", default="4096,4096",

                help="Comma separated list of disk sizes (MiB)"),

     DISK_TEMPLATE_OPT,

     cli_option("--nics", default="00:11:22:33:44:55",

                help="Comma separated list of nics, each nic"

                " definition is of form mac/ip/bridge, if"

                " missing values are replace by None"),

     OS_OPT,

     cli_option("-p", "--vcpus", default=1, type="int",

                help="Select number of VCPUs for the instance"),

     cli_option("--tags", default=None,

                help="Comma separated list of tags"),

     cli_option("--reloc-mode", default=constants.IALLOCATOR_MRELOC_ANY,

                choices=list(constants.IALLOCATOR_MRELOC_MODES),

                help=("Instance relocation mode (one of %s)" %

                      utils.CommaJoin(constants.IALLOCATOR_MRELOC_MODES))),

     cli_option("--target-groups", help="Target groups for relocation"),

     DRY_RUN_OPT, PRIORITY_OPT,

     ],

    "{opts...} <instance>", "Executes a TestAllocator OpCode"),

  "test-jobqueue": (

    TestJobqueue, ARGS_NONE, [PRIORITY_OPT],

    "", "Test a few aspects of the job queue"),

  "locks": (

    ListLocks, ARGS_NONE,

    [NOHDR_OPT, SEP_OPT, FIELDS_OPT, INTERVAL_OPT, VERBOSE_OPT],

    "[--interval N]", "Show a list of locks in the master daemon"),

  }

def Main():

  return GenericMain(commands)