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import os
import re

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

ENV_PATTERN = re.compile(r"//\s+Environment Variables:(.*)")


class TestLoader(testsuite.JSTestLoader):
  @property
  def excluded_files(self):
    return {"assert.js", "utils.js"}


class TestSuite(testsuite.TestSuite):
  def _test_loader_class(self):
    return TestLoader

  def _test_class(self):
    return TestCase


class TestCase(testcase.D8TestCase):
  def __init__(self, *args, **kwargs):
    super(TestCase, self).__init__(*args, **kwargs)

    self._source_flags = self._parse_source_flags()
    source = self.get_source()
    self._env = self._parse_source_env(source)

  def _parse_source_env(self, source):
    env_match = ENV_PATTERN.search(source)
    # https://crbug.com/v8/8845
    if 'LC_ALL' in os.environ:
      del os.environ['LC_ALL']
    env = {}
    if env_match:
      for env_pair in env_match.group(1).strip().split():
        var, value = env_pair.split('=')
        env[var] = value
    return env

  def _get_cmd_env(self):
    return self._env

  def _get_files_params(self):
    files = [
      os.path.join(self.suite.root, f) for f in [
        'assert.js',
        'utils.js',
        self.path + self._get_suffix(),
      ]
    ]

    if self._test_config.isolates:
      files += ['--isolate'] + files
    return files

  def _get_source_flags(self):
    return self._source_flags

  def _get_suite_flags(self):
    return ['--allow-natives-syntax']

  def _get_source_path(self):
    return os.path.join(self.suite.root, self.path + self._get_suffix())