#!/usr/bin/python
"""Run tests in parallel."""

import argparse
import glob
import itertools
import multiprocessing
import sys
import time

import jobset
import watch_dirs

# SimpleConfig: just compile with CONFIG=config, and run the binary to test
class SimpleConfig(object):
  def __init__(self, config):
    self.build_config = config
    self.maxjobs = 32 * multiprocessing.cpu_count()

  def run_command(self, binary):
    return [binary]


# ValgrindConfig: compile with some CONFIG=config, but use valgrind to run
class ValgrindConfig(object):
  def __init__(self, config, tool):
    self.build_config = config
    self.tool = tool
    self.maxjobs = 4 * multiprocessing.cpu_count()

  def run_command(self, binary):
    return ['valgrind', binary, '--tool=%s' % self.tool]


# different configurations we can run under
_CONFIGS = {
  'dbg': SimpleConfig('dbg'),
  'opt': SimpleConfig('opt'),
  'tsan': SimpleConfig('tsan'),
  'msan': SimpleConfig('msan'),
  'asan': SimpleConfig('asan'),
  'gcov': SimpleConfig('gcov'),
  'memcheck': ValgrindConfig('dbg', 'memcheck'),
  'helgrind': ValgrindConfig('dbg', 'helgrind')
  }


_DEFAULT = ['dbg', 'opt']
_MAKE_TEST_TARGETS = ['buildtests_c', 'buildtests_cxx']

# parse command line
argp = argparse.ArgumentParser(description='Run grpc tests.')
argp.add_argument('-c', '--config',
                  choices=['all'] + sorted(_CONFIGS.keys()),
                  nargs='+',
                  default=_DEFAULT)
argp.add_argument('-t', '--test-filter', nargs='*', default=['*'])
argp.add_argument('-n', '--runs_per_test', default=1, type=int)
argp.add_argument('-f', '--forever',
                  default=False,
                  action='store_const',
                  const=True)
argp.add_argument('--newline_on_success',
                  default=False,
                  action='store_const',
                  const=True)
args = argp.parse_args()

# grab config
run_configs = set(_CONFIGS[cfg]
                  for cfg in itertools.chain.from_iterable(
                      _CONFIGS.iterkeys() if x == 'all' else [x]
                      for x in args.config))
build_configs = set(cfg.build_config for cfg in run_configs)
filters = args.test_filter
runs_per_test = args.runs_per_test
forever = args.forever


def _build_and_run(check_cancelled, newline_on_success, forever=False):
  """Do one pass of building & running tests."""
  # build latest, sharing cpu between the various makes
  if not jobset.run(
      (['make',
        '-j', '%d' % (multiprocessing.cpu_count() + 1),
        'CONFIG=%s' % cfg] + _MAKE_TEST_TARGETS
       for cfg in build_configs),
      check_cancelled, maxjobs=1):
    return 1

  # run all the tests
  if not jobset.run(
      itertools.ifilter(
          lambda x: x is not None, (
              config.run_command(x)
              for config in run_configs
              for filt in filters
              for x in itertools.chain.from_iterable(itertools.repeat(
                  glob.glob('bins/%s/%s_test' % (
                      config.build_config, filt)),
                  runs_per_test)))),
              check_cancelled,
              newline_on_success=newline_on_success,
              maxjobs=min(c.maxjobs for c in run_configs)):
    return 2

  return 0


if forever:
  success = True
  while True:
    dw = watch_dirs.DirWatcher(['src', 'include', 'test'])
    initial_time = dw.most_recent_change()
    have_files_changed = lambda: dw.most_recent_change() != initial_time
    previous_success = success
    success = _build_and_run(have_files_changed,
                             newline_on_success=False,
                             forever=True) == 0
    if not previous_success and success:
      jobset.message('SUCCESS',
                     'All tests are now passing properly',
                     do_newline=True)
    jobset.message('IDLE', 'No change detected')
    while not have_files_changed():
      time.sleep(1)
else:
  result = _build_and_run(lambda: False,
                          newline_on_success=args.newline_on_success)
  if result == 0:
    jobset.message('SUCCESS', 'All tests passed', do_newline=True)
  else:
    jobset.message('FAILED', 'Some tests failed', do_newline=True)
  sys.exit(result)

@@ -1151,19 +1151,23 @@
 'opt'%5D%0A_
-MAK
+LANGUAG
 E_TEST_T
@@ -1179,24 +1179,47 @@
 S = 
-%5B'buildtests_c',
+%7B%0A    'c++': 'buildtests_cxx',%0A    'c':
  'bu
@@ -1232,12 +1232,12 @@
 ts_c
-xx'%5D
+',%0A%7D
 %0A%0A# 
@@ -1895,16 +1895,213 @@
 t=True)%0A
+argp.add_argument('-l', '--language',%0A                  choices=sorted(_LANGUAGE_TEST_TARGETS.keys()),%0A                  nargs='+',%0A                  default=sorted(_LANGUAGE_TEST_TARGETS.keys()))%0A
 args = a
@@ -2395,16 +2395,85 @@
 onfigs)%0A
+make_targets = set(_LANGUAGE_TEST_TARGETS%5Bx%5D for x in args.language)%0A
 filters 
@@ -2854,26 +2854,26 @@
 %5D + 
-_MAKE_TEST_TARGETS
+list(make_targets)
 %0A   

Allow language to be specified to run_tests.py