#!/usr/bin/env python2
"""Script adapter used by automation client for testing dejagnu.

   This is not intended to be run on command line.
   To kick off a single dejagnu run, use ./dejagnu/run_dejagnu.py
"""

from __future__ import print_function

import argparse
import sys
import setup_chromeos

from dejagnu import gdb_dejagnu
from cros_utils import command_executer
from cros_utils import email_sender


class DejagnuAdapter(object):
  """Dejagnu Adapter class."""

  def __init__(self, board, remote, gdb_dir, chromeos_root, cleanup):
    self._board = board
    self._remote = remote
    self._gdb_dir = gdb_dir
    self._chromeos_root = chromeos_root
    self._cleanup = cleanup
    self._cmd_exec = command_executer.GetCommandExecuter()

  def SetupChromeOS(self):
    cmd = [
        setup_chromeos.__file__, '--dir=' + self._chromeos_root, '--minilayout',
        '--jobs=8'
    ]
    ret = setup_chromeos.Main(cmd)
    if ret:
      raise RuntimeError('Failed to checkout chromeos')
    ## Do cros_sdk and setup_board, otherwise build_tc in next step will fail.
    cmd = 'cd {0} && cros_sdk --download'.format(self._chromeos_root)
    ret = self._cmd_exec.RunCommand(cmd, terminated_timeout=9000)
    if ret:
      raise RuntimeError('Failed to create chroot.')

  def SetupBoard(self):
    cmd = 'setup_board --board=' + self._board
    ret = self._cmd_exec.ChrootRunCommand(
        self._chromeos_root, cmd, terminated_timeout=4000)
    if ret:
      raise RuntimeError('Failed to setup board.')

  def CheckGDB(self):
    args = [
        gdb_dejagnu.__file__, '--board=' + self._board,
        '--chromeos_root=' + self._chromeos_root, '--mount=' + self._gdb_dir,
        '--remote=' + self._remote
    ]
    if self._cleanup:
      args.append('--cleanup=' + self._cleanup)
    return gdb_dejagnu.Main(args)


# Parse the output log to determine how many failures we have.
# Return -1 if parse output log failed.
def GetNumNewFailures(result):
  if not result:
    return 0
  return len(result)


# Do not throw any exception in this function!
def EmailResult(result):
  email_to = ['yunlian@google.com']
  if len(result) == 4:
    subject = 'Job failed: dejagnu test didn\'t finish'
    email_text = (
        'Job failed prematurely, check exception below.\n' + result[3])
  elif result[0]:
    subject = 'Job finished: dejagnu test failed'
    num_new_failures = GetNumNewFailures(result[1])
    if num_new_failures >= 0:
      summary = '{0} new fail(s), check log below.'.format(num_new_failures)
    else:
      summary = 'At least 1 new fail found, check log below.'
    email_text = (summary + ('\nStdout ====\n'
                             '{0}\n'
                             '\nStderr ===\n'
                             '{1}\n').format(result[1], result[2]))
  else:
    subject = 'Job finished: dejagnu test passed'
    email_text = ('Cool! No new fail found.\n'
                  '\nStdout ====\n'
                  '{0}\n'
                  '\nStderr ====\n'
                  '{1}\n').format(result[1], result[2])

  try:
    email_sender.EmailSender().SendEmail(email_to, subject, email_text)
    print('Email sent.')
  except Exception as e:
    # Do not propagate this email sending exception, you want to email an
    # email exception? Just log it on console.
    print('Sending email failed - {0}'
          'Subject: {1}'
          'Text: {2}').format(str(e), subject, email_text)


def ProcessArguments(argv):
  """Processing script arguments."""
  parser = argparse.ArgumentParser(
      description=('This script is used by nightly client to test gdb. '
                   'DO NOT run it unless you know what you are doing.'),
      usage='test_gdb_dejagnu.py options')
  parser.add_argument(
      '-b',
      '--board',
      dest='board',
      help=('Required. Specify board type. For example '
            '\'lumpy\' and \'daisy\''))
  parser.add_argument(
      '-r',
      '--remote',
      dest='remote',
      help=('Required. Specify remote board address'))
  parser.add_argument(
      '-g',
      '--gdb_dir',
      dest='gdb_dir',
      default='',
      help=('Optional. Specify gdb checkout directory.'))
  parser.add_argument(
      '-c',
      '--chromeos_root',
      dest='chromeos_root',
      default='chromeos.live',
      help=('Optional. Specify chromeos checkout directory.'))
  parser.add_argument(
      '--cleanup',
      dest='cleanup',
      default=None,
      help=('Optional. Do cleanup after the test.'))

  options = parser.parse_args(argv)

  if not options.board or not options.remote:
    raise SyntaxError('--board and --remote are mandatory options.')

  return options


def Main(argv):
  opt = ProcessArguments(argv)
  print(opt)
  adapter = DejagnuAdapter(opt.board, opt.remote, opt.gdb_dir,
                           opt.chromeos_root, opt.cleanup)
  try:
    adapter.SetupChromeOS()
    adapter.SetupBoard()
    ret = adapter.CheckGDB()
  except Exception as e:
    print(e)
    ret = (1, '', '', str(e))
  finally:
    EmailResult(ret)

  return ret


if __name__ == '__main__':
  retval = Main(sys.argv[1:])
  sys.exit(retval[0])