# Copyright 2012 the V8 project authors. All rights reserved.
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import hashlib
import imp
import os
import shutil
import sys
import tarfile


from testrunner.local import statusfile
from testrunner.local import testsuite
from testrunner.local import utils
from testrunner.objects import testcase

ARCHIVE = os.path.join(os.path.dirname(os.path.abspath(__file__)), "data.tar")

TEST_262_HARNESS_FILES = ["sta.js", "assert.js"]

TEST_262_SUITE_PATH = ["data", "test"]
TEST_262_HARNESS_PATH = ["data", "harness"]
TEST_262_TOOLS_PATH = ["data", "tools", "packaging"]

ALL_VARIANT_FLAGS_STRICT = dict(
    (v, [flags + ["--use-strict"] for flags in flag_sets])
    for v, flag_sets in testsuite.ALL_VARIANT_FLAGS.iteritems()
)

FAST_VARIANT_FLAGS_STRICT = dict(
    (v, [flags + ["--use-strict"] for flags in flag_sets])
    for v, flag_sets in testsuite.FAST_VARIANT_FLAGS.iteritems()
)

ALL_VARIANT_FLAGS_BOTH = dict(
    (v, [flags for flags in testsuite.ALL_VARIANT_FLAGS[v] +
                            ALL_VARIANT_FLAGS_STRICT[v]])
    for v in testsuite.ALL_VARIANT_FLAGS
)

FAST_VARIANT_FLAGS_BOTH = dict(
    (v, [flags for flags in testsuite.FAST_VARIANT_FLAGS[v] +
                            FAST_VARIANT_FLAGS_STRICT[v]])
    for v in testsuite.FAST_VARIANT_FLAGS
)

ALL_VARIANTS = {
  'nostrict': testsuite.ALL_VARIANT_FLAGS,
  'strict': ALL_VARIANT_FLAGS_STRICT,
  'both': ALL_VARIANT_FLAGS_BOTH,
}

FAST_VARIANTS = {
  'nostrict': testsuite.FAST_VARIANT_FLAGS,
  'strict': FAST_VARIANT_FLAGS_STRICT,
  'both': FAST_VARIANT_FLAGS_BOTH,
}

class Test262VariantGenerator(testsuite.VariantGenerator):
  def GetFlagSets(self, testcase, variant):
    if testcase.outcomes and statusfile.OnlyFastVariants(testcase.outcomes):
      variant_flags = FAST_VARIANTS
    else:
      variant_flags = ALL_VARIANTS

    test_record = self.suite.GetTestRecord(testcase)
    if "noStrict" in test_record:
      return variant_flags["nostrict"][variant]
    if "onlyStrict" in test_record:
      return variant_flags["strict"][variant]
    return variant_flags["both"][variant]


class Test262TestSuite(testsuite.TestSuite):

  def __init__(self, name, root):
    super(Test262TestSuite, self).__init__(name, root)
    self.testroot = os.path.join(self.root, *TEST_262_SUITE_PATH)
    self.harnesspath = os.path.join(self.root, *TEST_262_HARNESS_PATH)
    self.harness = [os.path.join(self.harnesspath, f)
                    for f in TEST_262_HARNESS_FILES]
    self.harness += [os.path.join(self.root, "harness-adapt.js")]
    self.ParseTestRecord = None

  def ListTests(self, context):
    tests = []
    for dirname, dirs, files in os.walk(self.testroot):
      for dotted in [x for x in dirs if x.startswith(".")]:
        dirs.remove(dotted)
      if context.noi18n and "intl402" in dirs:
        dirs.remove("intl402")
      dirs.sort()
      files.sort()
      for filename in files:
        if filename.endswith(".js"):
          fullpath = os.path.join(dirname, filename)
          relpath = fullpath[len(self.testroot) + 1 : -3]
          testname = relpath.replace(os.path.sep, "/")
          case = testcase.TestCase(self, testname)
          tests.append(case)
    return tests

  def GetFlagsForTestCase(self, testcase, context):
    return (testcase.flags + context.mode_flags + self.harness +
            self.GetIncludesForTest(testcase) + ["--harmony"] +
            [os.path.join(self.testroot, testcase.path + ".js")])

  def _VariantGeneratorFactory(self):
    return Test262VariantGenerator

  def LoadParseTestRecord(self):
    if not self.ParseTestRecord:
      root = os.path.join(self.root, *TEST_262_TOOLS_PATH)
      f = None
      try:
        (f, pathname, description) = imp.find_module("parseTestRecord", [root])
        module = imp.load_module("parseTestRecord", f, pathname, description)
        self.ParseTestRecord = module.parseTestRecord
      except:
        raise ImportError("Cannot load parseTestRecord; you may need to "
                          "--download-data for test262")
      finally:
        if f:
          f.close()
    return self.ParseTestRecord

  def GetTestRecord(self, testcase):
    if not hasattr(testcase, "test_record"):
      ParseTestRecord = self.LoadParseTestRecord()
      testcase.test_record = ParseTestRecord(self.GetSourceForTest(testcase),
                                             testcase.path)
    return testcase.test_record

  def GetIncludesForTest(self, testcase):
    test_record = self.GetTestRecord(testcase)
    if "includes" in test_record:
      includes = [os.path.join(self.harnesspath, f)
                  for f in test_record["includes"]]
    else:
      includes = []
    return includes

  def GetSourceForTest(self, testcase):
    filename = os.path.join(self.testroot, testcase.path + ".js")
    with open(filename) as f:
      return f.read()

  def IsNegativeTest(self, testcase):
    test_record = self.GetTestRecord(testcase)
    return "negative" in test_record

  def IsFailureOutput(self, output, testpath):
    if output.exit_code != 0:
      return True
    return "FAILED!" in output.stdout

  def HasUnexpectedOutput(self, testcase):
    outcome = self.GetOutcome(testcase)
    if (statusfile.FAIL_SLOPPY in testcase.outcomes and
        "--use-strict" not in testcase.flags):
      return outcome != statusfile.FAIL
    return not outcome in (testcase.outcomes or [statusfile.PASS])

  def DownloadData(self):
    print "Test262 download is deprecated. It's part of DEPS."

    # Clean up old directories and archive files.
    directory_old_name = os.path.join(self.root, "data.old")
    if os.path.exists(directory_old_name):
      shutil.rmtree(directory_old_name)

    archive_files = [f for f in os.listdir(self.root)
                     if f.startswith("tc39-test262-")]
    if len(archive_files) > 0:
      print "Clobber outdated test archives ..."
      for f in archive_files:
        os.remove(os.path.join(self.root, f))

    print "Extracting archive..."
    tar = tarfile.open(ARCHIVE)
    tar.extractall(path=os.path.dirname(ARCHIVE))
    tar.close()


def GetSuite(name, root):
  return Test262TestSuite(name, root)