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import test
import os
from os.path import join, exists
import urllib
import hashlib
import sys
import tarfile


TEST_262_ARCHIVE_REVISION = 'fb327c439e20'  # This is the r334 revision.
TEST_262_ARCHIVE_MD5 = '307acd166ec34629592f240dc12d57ed'
TEST_262_URL = 'http://hg.ecmascript.org/tests/test262/archive/%s.tar.bz2'
TEST_262_HARNESS = ['sta.js']


class Test262TestCase(test.TestCase):

  def __init__(self, filename, path, context, root, mode, framework):
    super(Test262TestCase, self).__init__(context, path, mode)
    self.filename = filename
    self.framework = framework
    self.root = root

  def IsNegative(self):
    return '@negative' in self.GetSource()

  def GetLabel(self):
    return "%s test262 %s" % (self.mode, self.GetName())

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

  def GetCommand(self):
    result = self.context.GetVmCommand(self, self.mode)
    result += [ '--es5_readonly' ]  # Temporary hack until we can remove flag
    result += self.framework
    result.append(self.filename)
    return result

  def GetName(self):
    return self.path[-1]

  def GetSource(self):
    return open(self.filename).read()


class Test262TestConfiguration(test.TestConfiguration):

  def __init__(self, context, root):
    super(Test262TestConfiguration, self).__init__(context, root)

  def ListTests(self, current_path, path, mode, variant_flags):
    testroot = join(self.root, 'data', 'test', 'suite')
    harness = [join(self.root, 'data', 'test', 'harness', f)
                   for f in TEST_262_HARNESS]
    harness += [join(self.root, 'harness-adapt.js')]
    tests = []
    for root, dirs, files in os.walk(testroot):
      for dotted in [x for x in dirs if x.startswith('.')]:
        dirs.remove(dotted)
      dirs.sort()
      root_path = root[len(self.root):].split(os.path.sep)
      root_path = current_path + [x for x in root_path if x]
      files.sort()
      for file in files:
        if file.endswith('.js'):
          test_path = ['test262', file[:-3]]
          if self.Contains(path, test_path):
            test = Test262TestCase(join(root, file), test_path, self.context,
                                   self.root, mode, harness)
            tests.append(test)
    return tests

  def DownloadData(self):
    revision = TEST_262_ARCHIVE_REVISION
    archive_url = TEST_262_URL % revision
    archive_name = join(self.root, 'test262-%s.tar.bz2' % revision)
    directory_name = join(self.root, 'data')
    directory_old_name = join(self.root, 'data.old')
    if not exists(archive_name):
      print "Downloading test data from %s ..." % archive_url
      urllib.urlretrieve(archive_url, archive_name)
      if exists(directory_name):
        os.rename(directory_name, directory_old_name)
    if not exists(directory_name):
      print "Extracting test262-%s.tar.bz2 ..." % revision
      md5 = hashlib.md5()
      with open(archive_name,'rb') as f:
        for chunk in iter(lambda: f.read(8192), ''):
          md5.update(chunk)
      if md5.hexdigest() != TEST_262_ARCHIVE_MD5:
        os.remove(archive_name)
        raise Exception("Hash mismatch of test data file")
      archive = tarfile.open(archive_name, 'r:bz2')
      if sys.platform in ('win32', 'cygwin'):
        # Magic incantation to allow longer path names on Windows.
        archive.extractall(u'\\\\?\\%s' % self.root)
      else:
        archive.extractall(self.root)
      os.rename(join(self.root, 'test262-%s' % revision), directory_name)

  def GetBuildRequirements(self):
    return ['d8']

  def GetTestStatus(self, sections, defs):
    status_file = join(self.root, 'test262.status')
    if exists(status_file):
      test.ReadConfigurationInto(status_file, sections, defs)


def GetConfiguration(context, root):
  return Test262TestConfiguration(context, root)
