#!/usr/bin/env python
#
# Copyright 2012 the V8 project authors. All rights reserved.
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# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
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#       copyright notice, this list of conditions and the following
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#       with the distribution.
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#       contributors may be used to endorse or promote products derived
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import itertools
import multiprocessing
import optparse
import os
from os.path import join
import platform
import random
import shlex
import subprocess
import sys
import time

from testrunner.local import execution
from testrunner.local import progress
from testrunner.local import testsuite
from testrunner.local import utils
from testrunner.local import verbose
from testrunner.network import network_execution
from testrunner.objects import context


ARCH_GUESS = utils.DefaultArch()
DEFAULT_TESTS = ["mjsunit", "fuzz-natives", "cctest", "message", "preparser"]
TIMEOUT_DEFAULT = 60
TIMEOUT_SCALEFACTOR = {"debug"   : 4,
                       "release" : 1 }

# Use this to run several variants of the tests.
VARIANT_FLAGS = {
    "default": [],
    "stress": ["--stress-opt", "--always-opt"],
    "nocrankshaft": ["--nocrankshaft"]}

VARIANTS = ["default", "stress", "nocrankshaft"]

MODE_FLAGS = {
    "debug"   : ["--nohard-abort", "--nodead-code-elimination",
                 "--nofold-constants", "--enable-slow-asserts",
                 "--debug-code", "--verify-heap"],
    "release" : ["--nohard-abort", "--nodead-code-elimination",
                 "--nofold-constants"]}

GC_STRESS_FLAGS = ["--gc-interval=500", "--stress-compaction",
                   "--concurrent-recompilation-queue-length=64",
                   "--concurrent-recompilation-delay=500",
                   "--concurrent-recompilation"]

SUPPORTED_ARCHS = ["android_arm",
                   "android_arm64",
                   "android_ia32",
                   "arm",
                   "ia32",
                   "x87",
                   "mips",
                   "mipsel",
                   "nacl_ia32",
                   "nacl_x64",
                   "x64",
                   "arm64"]
# Double the timeout for these:
SLOW_ARCHS = ["android_arm",
              "android_arm64",
              "android_ia32",
              "arm",
              "mips",
              "mipsel",
              "nacl_ia32",
              "nacl_x64",
              "x87",
              "arm64"]


def BuildOptions():
  result = optparse.OptionParser()
  result.add_option("--arch",
                    help=("The architecture to run tests for, "
                          "'auto' or 'native' for auto-detect"),
                    default="ia32,x64,arm")
  result.add_option("--arch-and-mode",
                    help="Architecture and mode in the format 'arch.mode'",
                    default=None)
  result.add_option("--asan",
                    help="Regard test expectations for ASAN",
                    default=False, action="store_true")
  result.add_option("--buildbot",
                    help="Adapt to path structure used on buildbots",
                    default=False, action="store_true")
  result.add_option("--cat", help="Print the source of the tests",
                    default=False, action="store_true")
  result.add_option("--flaky-tests",
                    help="Regard tests marked as flaky (run|skip|dontcare)",
                    default="dontcare")
  result.add_option("--slow-tests",
                    help="Regard slow tests (run|skip|dontcare)",
                    default="dontcare")
  result.add_option("--pass-fail-tests",
                    help="Regard pass|fail tests (run|skip|dontcare)",
                    default="dontcare")
  result.add_option("--gc-stress",
                    help="Switch on GC stress mode",
                    default=False, action="store_true")
  result.add_option("--command-prefix",
                    help="Prepended to each shell command used to run a test",
                    default="")
  result.add_option("--download-data", help="Download missing test suite data",
                    default=False, action="store_true")
  result.add_option("--extra-flags",
                    help="Additional flags to pass to each test command",
                    default="")
  result.add_option("--isolates", help="Whether to test isolates",
                    default=False, action="store_true")
  result.add_option("-j", help="The number of parallel tasks to run",
                    default=0, type="int")
  result.add_option("-m", "--mode",
                    help="The test modes in which to run (comma-separated)",
                    default="release,debug")
  result.add_option("--no-i18n", "--noi18n",
                    help="Skip internationalization tests",
                    default=False, action="store_true")
  result.add_option("--no-network", "--nonetwork",
                    help="Don't distribute tests on the network",
                    default=(utils.GuessOS() != "linux"),
                    dest="no_network", action="store_true")
  result.add_option("--no-presubmit", "--nopresubmit",
                    help='Skip presubmit checks',
                    default=False, dest="no_presubmit", action="store_true")
  result.add_option("--no-snap", "--nosnap",
                    help='Test a build compiled without snapshot.',
                    default=False, dest="no_snap", action="store_true")
  result.add_option("--no-sorting", "--nosorting",
                    help="Don't sort tests according to duration of last run.",
                    default=False, dest="no_sorting", action="store_true")
  result.add_option("--no-stress", "--nostress",
                    help="Don't run crankshaft --always-opt --stress-op test",
                    default=False, dest="no_stress", action="store_true")
  result.add_option("--no-variants", "--novariants",
                    help="Don't run any testing variants",
                    default=False, dest="no_variants", action="store_true")
  result.add_option("--variants",
                    help="Comma-separated list of testing variants")
  result.add_option("--outdir", help="Base directory with compile output",
                    default="out")
  result.add_option("-p", "--progress",
                    help=("The style of progress indicator"
                          " (verbose, dots, color, mono)"),
                    choices=progress.PROGRESS_INDICATORS.keys(), default="mono")
  result.add_option("--quickcheck", default=False, action="store_true",
                    help=("Quick check mode (skip slow/flaky tests)"))
  result.add_option("--report", help="Print a summary of the tests to be run",
                    default=False, action="store_true")
  result.add_option("--json-test-results",
                    help="Path to a file for storing json results.")
  result.add_option("--shard-count",
                    help="Split testsuites into this number of shards",
                    default=1, type="int")
  result.add_option("--shard-run",
                    help="Run this shard from the split up tests.",
                    default=1, type="int")
  result.add_option("--shell", help="DEPRECATED! use --shell-dir", default="")
  result.add_option("--shell-dir", help="Directory containing executables",
                    default="")
  result.add_option("--dont-skip-slow-simulator-tests",
                    help="Don't skip more slow tests when using a simulator.",
                    default=False, action="store_true",
                    dest="dont_skip_simulator_slow_tests")
  result.add_option("--stress-only",
                    help="Only run tests with --always-opt --stress-opt",
                    default=False, action="store_true")
  result.add_option("--time", help="Print timing information after running",
                    default=False, action="store_true")
  result.add_option("-t", "--timeout", help="Timeout in seconds",
                    default= -1, type="int")
  result.add_option("-v", "--verbose", help="Verbose output",
                    default=False, action="store_true")
  result.add_option("--valgrind", help="Run tests through valgrind",
                    default=False, action="store_true")
  result.add_option("--warn-unused", help="Report unused rules",
                    default=False, action="store_true")
  result.add_option("--junitout", help="File name of the JUnit output")
  result.add_option("--junittestsuite",
                    help="The testsuite name in the JUnit output file",
                    default="v8tests")
  result.add_option("--random-seed", default=0, dest="random_seed",
                    help="Default seed for initializing random generator")
  return result


def ProcessOptions(options):
  global VARIANT_FLAGS
  global VARIANTS

  # Architecture and mode related stuff.
  if options.arch_and_mode:
    options.arch_and_mode = [arch_and_mode.split(".")
        for arch_and_mode in options.arch_and_mode.split(",")]
    options.arch = ",".join([tokens[0] for tokens in options.arch_and_mode])
    options.mode = ",".join([tokens[1] for tokens in options.arch_and_mode])
  options.mode = options.mode.split(",")
  for mode in options.mode:
    if not mode.lower() in ["debug", "release", "optdebug"]:
      print "Unknown mode %s" % mode
      return False
  if options.arch in ["auto", "native"]:
    options.arch = ARCH_GUESS
  options.arch = options.arch.split(",")
  for arch in options.arch:
    if not arch in SUPPORTED_ARCHS:
      print "Unknown architecture %s" % arch
      return False

  # Store the final configuration in arch_and_mode list. Don't overwrite
  # predefined arch_and_mode since it is more expressive than arch and mode.
  if not options.arch_and_mode:
    options.arch_and_mode = itertools.product(options.arch, options.mode)

  # Special processing of other options, sorted alphabetically.

  if options.buildbot:
    # Buildbots run presubmit tests as a separate step.
    options.no_presubmit = True
    options.no_network = True
  if options.command_prefix:
    print("Specifying --command-prefix disables network distribution, "
          "running tests locally.")
    options.no_network = True
  options.command_prefix = shlex.split(options.command_prefix)
  options.extra_flags = shlex.split(options.extra_flags)

  if options.gc_stress:
    options.extra_flags += GC_STRESS_FLAGS

  if options.asan:
    options.extra_flags.append("--invoke-weak-callbacks")

  if options.j == 0:
    options.j = multiprocessing.cpu_count()

  while options.random_seed == 0:
    options.random_seed = random.SystemRandom().randint(-2147483648, 2147483647)

  def excl(*args):
    """Returns true if zero or one of multiple arguments are true."""
    return reduce(lambda x, y: x + y, args) <= 1

  if not excl(options.no_stress, options.stress_only, options.no_variants,
              bool(options.variants), options.quickcheck):
    print("Use only one of --no-stress, --stress-only, --no-variants, "
          "--variants, or --quickcheck.")
    return False
  if options.no_stress:
    VARIANTS = ["default", "nocrankshaft"]
  if options.no_variants:
    VARIANTS = ["default"]
  if options.stress_only:
    VARIANTS = ["stress"]
  if options.variants:
    VARIANTS = options.variants.split(",")
    if not set(VARIANTS).issubset(VARIANT_FLAGS.keys()):
      print "All variants must be in %s" % str(VARIANT_FLAGS.keys())
      return False
  if options.quickcheck:
    VARIANTS = ["default", "stress"]
    options.flaky_tests = "skip"
    options.slow_tests = "skip"
    options.pass_fail_tests = "skip"

  if not options.shell_dir:
    if options.shell:
      print "Warning: --shell is deprecated, use --shell-dir instead."
      options.shell_dir = os.path.dirname(options.shell)
  if options.valgrind:
    run_valgrind = os.path.join("tools", "run-valgrind.py")
    # This is OK for distributed running, so we don't need to set no_network.
    options.command_prefix = (["python", "-u", run_valgrind] +
                              options.command_prefix)
  def CheckTestMode(name, option):
    if not option in ["run", "skip", "dontcare"]:
      print "Unknown %s mode %s" % (name, option)
      return False
    return True
  if not CheckTestMode("flaky test", options.flaky_tests):
    return False
  if not CheckTestMode("slow test", options.slow_tests):
    return False
  if not CheckTestMode("pass|fail test", options.pass_fail_tests):
    return False
  if not options.no_i18n:
    DEFAULT_TESTS.append("intl")
  return True


def ShardTests(tests, shard_count, shard_run):
  if shard_count < 2:
    return tests
  if shard_run < 1 or shard_run > shard_count:
    print "shard-run not a valid number, should be in [1:shard-count]"
    print "defaulting back to running all tests"
    return tests
  count = 0
  shard = []
  for test in tests:
    if count % shard_count == shard_run - 1:
      shard.append(test)
    count += 1
  return shard


def Main():
  parser = BuildOptions()
  (options, args) = parser.parse_args()
  if not ProcessOptions(options):
    parser.print_help()
    return 1

  exit_code = 0
  workspace = os.path.abspath(join(os.path.dirname(sys.argv[0]), ".."))
  if not options.no_presubmit:
    print ">>> running presubmit tests"
    exit_code = subprocess.call(
        [sys.executable, join(workspace, "tools", "presubmit.py")])

  suite_paths = utils.GetSuitePaths(join(workspace, "test"))

  if len(args) == 0:
    suite_paths = [ s for s in DEFAULT_TESTS if s in suite_paths ]
  else:
    args_suites = set()
    for arg in args:
      suite = arg.split(os.path.sep)[0]
      if not suite in args_suites:
        args_suites.add(suite)
    suite_paths = [ s for s in args_suites if s in suite_paths ]

  suites = []
  for root in suite_paths:
    suite = testsuite.TestSuite.LoadTestSuite(
        os.path.join(workspace, "test", root))
    if suite:
      suites.append(suite)

  if options.download_data:
    for s in suites:
      s.DownloadData()

  for (arch, mode) in options.arch_and_mode:
    try:
      code = Execute(arch, mode, args, options, suites, workspace)
    except KeyboardInterrupt:
      return 2
    exit_code = exit_code or code
  return exit_code


def Execute(arch, mode, args, options, suites, workspace):
  print(">>> Running tests for %s.%s" % (arch, mode))

  shell_dir = options.shell_dir
  if not shell_dir:
    if options.buildbot:
      shell_dir = os.path.join(workspace, options.outdir, mode)
      mode = mode.lower()
    else:
      shell_dir = os.path.join(workspace, options.outdir,
                               "%s.%s" % (arch, mode))
  shell_dir = os.path.relpath(shell_dir)

  if mode == "optdebug":
    mode = "debug"  # "optdebug" is just an alias.

  # Populate context object.
  mode_flags = MODE_FLAGS[mode]
  timeout = options.timeout
  if timeout == -1:
    # Simulators are slow, therefore allow a longer default timeout.
    if arch in SLOW_ARCHS:
      timeout = 2 * TIMEOUT_DEFAULT;
    else:
      timeout = TIMEOUT_DEFAULT;

  timeout *= TIMEOUT_SCALEFACTOR[mode]
  ctx = context.Context(arch, mode, shell_dir,
                        mode_flags, options.verbose,
                        timeout, options.isolates,
                        options.command_prefix,
                        options.extra_flags,
                        options.no_i18n,
                        options.random_seed,
                        options.no_sorting)

  # TODO(all): Combine "simulator" and "simulator_run".
  simulator_run = not options.dont_skip_simulator_slow_tests and \
      arch in ['arm64', 'arm', 'mips'] and ARCH_GUESS and arch != ARCH_GUESS
  # Find available test suites and read test cases from them.
  variables = {
    "arch": arch,
    "asan": options.asan,
    "deopt_fuzzer": False,
    "gc_stress": options.gc_stress,
    "isolates": options.isolates,
    "mode": mode,
    "no_i18n": options.no_i18n,
    "no_snap": options.no_snap,
    "simulator_run": simulator_run,
    "simulator": utils.UseSimulator(arch),
    "system": utils.GuessOS(),
  }
  all_tests = []
  num_tests = 0
  test_id = 0
  for s in suites:
    s.ReadStatusFile(variables)
    s.ReadTestCases(ctx)
    if len(args) > 0:
      s.FilterTestCasesByArgs(args)
    all_tests += s.tests
    s.FilterTestCasesByStatus(options.warn_unused, options.flaky_tests,
                              options.slow_tests, options.pass_fail_tests)
    if options.cat:
      verbose.PrintTestSource(s.tests)
      continue
    variant_flags = [VARIANT_FLAGS[var] for var in VARIANTS]
    s.tests = [ t.CopyAddingFlags(v)
                for t in s.tests
                for v in s.VariantFlags(t, variant_flags) ]
    s.tests = ShardTests(s.tests, options.shard_count, options.shard_run)
    num_tests += len(s.tests)
    for t in s.tests:
      t.id = test_id
      test_id += 1

  if options.cat:
    return 0  # We're done here.

  if options.report:
    verbose.PrintReport(all_tests)

  if num_tests == 0:
    print "No tests to run."
    return 0

  # Run the tests, either locally or distributed on the network.
  start_time = time.time()
  progress_indicator = progress.PROGRESS_INDICATORS[options.progress]()
  if options.junitout:
    progress_indicator = progress.JUnitTestProgressIndicator(
        progress_indicator, options.junitout, options.junittestsuite)
  if options.json_test_results:
    progress_indicator = progress.JsonTestProgressIndicator(
        progress_indicator, options.json_test_results, arch, mode)

  run_networked = not options.no_network
  if not run_networked:
    print("Network distribution disabled, running tests locally.")
  elif utils.GuessOS() != "linux":
    print("Network distribution is only supported on Linux, sorry!")
    run_networked = False
  peers = []
  if run_networked:
    peers = network_execution.GetPeers()
    if not peers:
      print("No connection to distribution server; running tests locally.")
      run_networked = False
    elif len(peers) == 1:
      print("No other peers on the network; running tests locally.")
      run_networked = False
    elif num_tests <= 100:
      print("Less than 100 tests, running them locally.")
      run_networked = False

  if run_networked:
    runner = network_execution.NetworkedRunner(suites, progress_indicator,
                                               ctx, peers, workspace)
  else:
    runner = execution.Runner(suites, progress_indicator, ctx)

  exit_code = runner.Run(options.j)
  overall_duration = time.time() - start_time

  if options.time:
    verbose.PrintTestDurations(suites, overall_duration)
  return exit_code


if __name__ == "__main__":
  sys.exit(Main())