#!/usr/bin/env python2.7
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"""Run test matrix."""

import argparse
import jobset
import os
import report_utils
import sys

_ROOT = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), '../..'))
os.chdir(_ROOT)

# TODO(jtattermusch): this is not going to be enough for sanitizers.
_RUNTESTS_TIMEOUT = 30*60


def _docker_jobspec(name, runtests_args=[]):
  """Run a single instance of run_tests.py in a docker container"""
  # TODO: fix copying report files from inside docker....
  test_job = jobset.JobSpec(
          cmdline=['python', 'tools/run_tests/run_tests.py',
                   '--use_docker',
                   '-t',
                   '-j', '3',
                   '-x', 'report_%s.xml' % name] + runtests_args,
          shortname='run_tests_%s' % name,
          timeout_seconds=_RUNTESTS_TIMEOUT)
  return test_job


def _workspace_jobspec(name, runtests_args=[], workspace_name=None):
  """Run a single instance of run_tests.py in a separate workspace"""
  env = {'WORKSPACE_NAME': workspace_name}
  test_job = jobset.JobSpec(
          cmdline=['tools/run_tests/run_tests_in_workspace.sh',
                   '-t',
                   '-j', '3',
                   '-x', '../report_%s.xml' % name] + runtests_args,
          environ=env,
          shortname='run_tests_%s' % name,
          timeout_seconds=_RUNTESTS_TIMEOUT)
  return test_job


def _generate_jobs(languages, configs, platforms,
                  arch=None, compiler=None,
                  labels=[]):
  result = []
  for language in languages:
    for platform in platforms:
      for config in configs:
        name = '%s_%s_%s' % (language, platform, config)
        runtests_args = ['-l', language,
                         '-c', config]
        if arch or compiler:
          name += '_%s_%s' % (arch, compiler)
          runtests_args += ['--arch', arch,
                            '--compiler', compiler]

        if platform == 'linux':
          job = _docker_jobspec(name=name, runtests_args=runtests_args)
        else:
          job = _workspace_jobspec(name=name, runtests_args=runtests_args)

        job.labels = [platform, config, language] + labels
        result.append(job)
  return result


def _create_test_jobs():
  test_jobs = []
  # supported on linux only
  test_jobs += _generate_jobs(languages=['sanity', 'php7'],
                             configs=['dbg', 'opt'],
                             platforms=['linux'],
                             labels=['basictests'])
  
  # supported on all platforms.
  test_jobs += _generate_jobs(languages=['c', 'csharp', 'node', 'python'],
                            configs=['dbg', 'opt'],
                            platforms=['linux', 'macos', 'windows'],
                            labels=['basictests'])
  
  # supported on linux and mac.
  test_jobs += _generate_jobs(languages=['c++', 'ruby', 'php'],
                             configs=['dbg', 'opt'],
                             platforms=['linux', 'macos'],
                             labels=['basictests'])
  
  # supported on mac only.
  test_jobs += _generate_jobs(languages=['objc'],
                              configs=['dbg', 'opt'],
                              platforms=['macos'],
                              labels=['basictests'])
  
  # sanitizers
  test_jobs += _generate_jobs(languages=['c'],
                              configs=['msan', 'asan', 'tsan'],
                              platforms=['linux'],
                              labels=['sanitizers'])
  test_jobs += _generate_jobs(languages=['c++'],
                              configs=['asan', 'tsan'],
                              platforms=['linux'],
                              labels=['sanitizers'])
  return test_jobs

  
def _create_portability_test_jobs():
  test_jobs = []
  # portability C x86
  test_jobs += _generate_jobs(languages=['c'],
                              configs=['dbg'],
                              platforms=['linux'],
                              arch='x86',
                              compiler='default',
                              labels=['portability'])
  
  # portability C and C++ on x64
  for compiler in ['gcc4.4', 'gcc4.6', 'gcc5.3',
                   'clang3.5', 'clang3.6', 'clang3.7']:
    test_jobs += _generate_jobs(languages=['c', 'c++'],
                                configs=['dbg'],
                                platforms=['linux'],
                                arch='x64',
                                compiler=compiler,
                                labels=['portability'])
  
  # portability C on Windows
  for arch in ['x86', 'x64']:
    for compiler in ['vs2013', 'vs2015']:
      test_jobs += _generate_jobs(languages=['c'],
                                  configs=['dbg'],
                                  platforms=['windows'],
                                  arch=arch,
                                  compiler=compiler,
                                  labels=['portability'])
  
  test_jobs += _generate_jobs(languages=['python'],
                              configs=['dbg'],
                              platforms=['linux'],
                              arch='default',
                              compiler='python3.4',
                              labels=['portability'])
  
  test_jobs += _generate_jobs(languages=['csharp'],
                              configs=['dbg'],
                              platforms=['linux'],
                              arch='default',
                              compiler='coreclr',
                              labels=['portability'])
  
  for compiler in ['node5', 'node6', 'node0.12']:
    test_jobs += _generate_jobs(languages=['node'],
                               configs=['dbg'],
                               platforms=['linux'],
                               arch='default',
                               compiler=compiler,
                               labels=['portability'])
  return test_jobs  


all_jobs = _create_test_jobs() + _create_portability_test_jobs()

all_labels = set()
for job in all_jobs:
  for label in job.labels:
    all_labels.add(label)

argp = argparse.ArgumentParser(description='Run a matrix of run_tests.py tests.')
argp.add_argument('-f', '--filter',
                  choices=sorted(all_labels),
                  nargs='+',
                  default=[],
                  help='Filter targets to run by label with AND semantics.')
args = argp.parse_args()

jobs = []
for job in all_jobs:
  if not args.filter or all(filter in job.labels for filter in args.filter):
    jobs.append(job)

if not jobs:
  jobset.message('FAILED', 'No test suites match given criteria.',
                 do_newline=True)
  sys.exit(1)
  
print('IMPORTANT: The changes you are testing need to be locally committed')
print('because only the committed changes in the current branch will be')
print('copied to the docker environment or into subworkspaces.')

print 
print 'Will run these tests:'
for job in jobs:
  print '  %s' % job.shortname
print

jobset.message('START', 'Running test matrix.', do_newline=True)
num_failures, resultset = jobset.run(jobs,
                                     newline_on_success=True,
                                     travis=True,
                                     maxjobs=2)
report_utils.render_junit_xml_report(resultset, 'report.xml')

if num_failures == 0:
  jobset.message('SUCCESS', 'All run_tests.py instance finished successfully.',
                 do_newline=True)
else:
  jobset.message('FAILED', 'Some run_tests.py instance have failed.',
                 do_newline=True)
  sys.exit(1)