# Copyright 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import logging
import os
import shutil
import tempfile
import unittest

from telemetry.core import util
from telemetry.core import exceptions
from telemetry import decorators
from telemetry.internal.browser import browser as browser_module
from telemetry.internal.browser import browser_finder
from telemetry.internal.platform import gpu_device
from telemetry.internal.platform import gpu_info
from telemetry.internal.platform import system_info
from telemetry.internal.util import path
from telemetry.testing import browser_test_case
from telemetry.testing import options_for_unittests
from telemetry.timeline import tracing_config

import mock


class IntentionalException(Exception):
  pass


class BrowserTest(browser_test_case.BrowserTestCase):
  def testBrowserCreation(self):
    self.assertEquals(1, len(self._browser.tabs))

    # Different browsers boot up to different things.
    assert self._browser.tabs[0].url

  @decorators.Enabled('has tabs')
  def testNewCloseTab(self):
    existing_tab = self._browser.tabs[0]
    self.assertEquals(1, len(self._browser.tabs))
    existing_tab_url = existing_tab.url

    new_tab = self._browser.tabs.New()
    self.assertEquals(2, len(self._browser.tabs))
    self.assertEquals(existing_tab.url, existing_tab_url)
    self.assertEquals(new_tab.url, 'about:blank')

    new_tab.Close()
    self.assertEquals(1, len(self._browser.tabs))
    self.assertEquals(existing_tab.url, existing_tab_url)

  def testMultipleTabCalls(self):
    self._browser.tabs[0].Navigate(self.UrlOfUnittestFile('blank.html'))
    self._browser.tabs[0].WaitForDocumentReadyStateToBeInteractiveOrBetter()

  def testTabCallByReference(self):
    tab = self._browser.tabs[0]
    tab.Navigate(self.UrlOfUnittestFile('blank.html'))
    self._browser.tabs[0].WaitForDocumentReadyStateToBeInteractiveOrBetter()

  @decorators.Enabled('has tabs')
  def testCloseReferencedTab(self):
    self._browser.tabs.New()
    tab = self._browser.tabs[0]
    tab.Navigate(self.UrlOfUnittestFile('blank.html'))
    tab.Close()
    self.assertEquals(1, len(self._browser.tabs))

  @decorators.Enabled('has tabs')
  def testForegroundTab(self):
    # Should be only one tab at this stage, so that must be the foreground tab
    original_tab = self._browser.tabs[0]
    self.assertEqual(self._browser.foreground_tab, original_tab)
    new_tab = self._browser.tabs.New()
    # New tab shouls be foreground tab
    self.assertEqual(self._browser.foreground_tab, new_tab)
    # Make sure that activating the background tab makes it the foreground tab
    original_tab.Activate()
    self.assertEqual(self._browser.foreground_tab, original_tab)
    # Closing the current foreground tab should switch the foreground tab to the
    # other tab
    original_tab.Close()
    self.assertEqual(self._browser.foreground_tab, new_tab)

  # This test uses the reference browser and doesn't have access to
  # helper binaries like crashpad_database_util.
  @decorators.Enabled('linux')
  def testGetMinidumpPathOnCrash(self):
    tab = self._browser.tabs[0]
    with self.assertRaises(exceptions.AppCrashException):
      tab.Navigate('chrome://crash', timeout=5)
    crash_minidump_path = self._browser.GetMostRecentMinidumpPath()
    self.assertIsNotNone(crash_minidump_path)

  def testGetSystemInfo(self):
    if not self._browser.supports_system_info:
      logging.warning(
          'Browser does not support getting system info, skipping test.')
      return

    info = self._browser.GetSystemInfo()

    self.assertTrue(isinstance(info, system_info.SystemInfo))
    self.assertTrue(hasattr(info, 'model_name'))
    self.assertTrue(hasattr(info, 'gpu'))
    self.assertTrue(isinstance(info.gpu, gpu_info.GPUInfo))
    self.assertTrue(hasattr(info.gpu, 'devices'))
    self.assertTrue(len(info.gpu.devices) > 0)
    for g in info.gpu.devices:
      self.assertTrue(isinstance(g, gpu_device.GPUDevice))

  def testGetSystemInfoNotCachedObject(self):
    if not self._browser.supports_system_info:
      logging.warning(
          'Browser does not support getting system info, skipping test.')
      return

    info_a = self._browser.GetSystemInfo()
    info_b = self._browser.GetSystemInfo()
    self.assertFalse(info_a is info_b)

  def testGetSystemTotalMemory(self):
    self.assertTrue(self._browser.memory_stats['SystemTotalPhysicalMemory'] > 0)

  @decorators.Disabled('cros-chrome-guest', 'system-guest',  # chromeos guest
                       'chromeos')  # crbug.com/628836.
  def testIsTracingRunning(self):
    tracing_controller = self._browser.platform.tracing_controller
    if not tracing_controller.IsChromeTracingSupported():
      return
    self.assertFalse(tracing_controller.is_tracing_running)
    config = tracing_config.TracingConfig()
    config.enable_chrome_trace = True
    tracing_controller.StartTracing(config)
    self.assertTrue(tracing_controller.is_tracing_running)
    tracing_controller.StopTracing()
    self.assertFalse(tracing_controller.is_tracing_running)


class CommandLineBrowserTest(browser_test_case.BrowserTestCase):
  @classmethod
  def CustomizeBrowserOptions(cls, options):
    options.AppendExtraBrowserArgs('--user-agent=telemetry')

  def testCommandLineOverriding(self):
    # This test starts the browser with --user-agent=telemetry. This tests
    # whether the user agent is then set.
    t = self._browser.tabs[0]
    t.Navigate(self.UrlOfUnittestFile('blank.html'))
    t.WaitForDocumentReadyStateToBeInteractiveOrBetter()
    self.assertEquals(t.EvaluateJavaScript('navigator.userAgent'),
                      'telemetry')

class DirtyProfileBrowserTest(browser_test_case.BrowserTestCase):
  @classmethod
  def CustomizeBrowserOptions(cls, options):
    options.profile_type = 'small_profile'

  @decorators.Disabled('chromeos')  # crbug.com/243912
  def testDirtyProfileCreation(self):
    self.assertEquals(1, len(self._browser.tabs))


class BrowserLoggingTest(browser_test_case.BrowserTestCase):
  @classmethod
  def CustomizeBrowserOptions(cls, options):
    options.logging_verbosity = options.VERBOSE_LOGGING

  @decorators.Disabled('chromeos', 'android')
  def testLogFileExist(self):
    self.assertTrue(
       os.path.isfile(self._browser._browser_backend.log_file_path))


def _GenerateBrowserProfile(number_of_tabs):
  """ Generate a browser profile which browser had |number_of_tabs| number of
  tabs opened before it was closed.
      Returns:
        profile_dir: the directory of profile.
  """
  profile_dir = tempfile.mkdtemp()
  options = options_for_unittests.GetCopy()
  options.browser_options.output_profile_path = profile_dir
  browser_to_create = browser_finder.FindBrowser(options)
  browser_to_create.platform.network_controller.InitializeIfNeeded()
  try:
    with browser_to_create.Create(options) as browser:
      browser.platform.SetHTTPServerDirectories(path.GetUnittestDataDir())
      blank_file_path = os.path.join(path.GetUnittestDataDir(), 'blank.html')
      blank_url = browser.platform.http_server.UrlOf(blank_file_path)
      browser.foreground_tab.Navigate(blank_url)
      browser.foreground_tab.WaitForDocumentReadyStateToBeComplete()
      for _ in xrange(number_of_tabs - 1):
        tab = browser.tabs.New()
        tab.Navigate(blank_url)
        tab.WaitForDocumentReadyStateToBeComplete()
    return profile_dir
  finally:
    browser_to_create.platform.network_controller.Close()


class BrowserCreationTest(unittest.TestCase):
  def setUp(self):
    self.mock_browser_backend = mock.MagicMock()
    self.mock_platform_backend = mock.MagicMock()

  def testCleanedUpCalledWhenExceptionRaisedInBrowserCreation(self):
    self.mock_platform_backend.platform.FlushDnsCache.side_effect = (
        IntentionalException('Boom!'))
    with self.assertRaises(IntentionalException):
      browser_module.Browser(
         self.mock_browser_backend, self.mock_platform_backend,
         credentials_path=None)
    self.assertTrue(self.mock_platform_backend.WillCloseBrowser.called)

  def testOriginalExceptionNotSwallow(self):
    self.mock_platform_backend.platform.FlushDnsCache.side_effect = (
        IntentionalException('Boom!'))
    self.mock_platform_backend.WillCloseBrowser.side_effect = (
        IntentionalException('Cannot close browser!'))
    with self.assertRaises(IntentionalException) as context:
      browser_module.Browser(
         self.mock_browser_backend, self.mock_platform_backend,
         credentials_path=None)
    self.assertIn('Boom!', context.exception.message)


class BrowserRestoreSessionTest(unittest.TestCase):

  @classmethod
  def setUpClass(cls):
    cls._number_of_tabs = 4
    cls._profile_dir = _GenerateBrowserProfile(cls._number_of_tabs)
    cls._options = options_for_unittests.GetCopy()
    cls._options.browser_options.AppendExtraBrowserArgs(
        ['--restore-last-session'])
    cls._options.browser_options.profile_dir = cls._profile_dir
    cls._browser_to_create = browser_finder.FindBrowser(cls._options)
    cls._browser_to_create.platform.network_controller.InitializeIfNeeded()

  @decorators.Enabled('has tabs')
  @decorators.Disabled('chromeos', 'win', 'mac')
  # TODO(nednguyen): Enable this test on windowsn platform
  def testRestoreBrowserWithMultipleTabs(self):
    with self._browser_to_create.Create(self._options) as browser:
      # The number of tabs will be self._number_of_tabs + 1 as it includes the
      # old tabs and a new blank tab.
      expected_number_of_tabs = self._number_of_tabs + 1
      try:
        util.WaitFor(lambda: len(browser.tabs) == expected_number_of_tabs, 10)
      except:
        logging.error('Number of tabs is %s' % len(browser.tabs))
        raise
      self.assertEquals(expected_number_of_tabs, len(browser.tabs))

  @classmethod
  def tearDownClass(cls):
    cls._browser_to_create.platform.network_controller.Close()
    shutil.rmtree(cls._profile_dir)


class TestBrowserOperationDoNotLeakTempFiles(unittest.TestCase):

  @decorators.Enabled('win', 'mac', 'linux')
  @decorators.Isolated
  def testBrowserNotLeakingTempFiles(self):
    options = options_for_unittests.GetCopy()
    browser_to_create = browser_finder.FindBrowser(options)
    self.assertIsNotNone(browser_to_create)
    before_browser_run_temp_dir_content = os.listdir(tempfile.tempdir)
    browser_to_create.platform.network_controller.InitializeIfNeeded()
    try:
      with browser_to_create.Create(options) as browser:
        tab = browser.tabs.New()
        tab.Navigate('about:blank')
        self.assertEquals(2, tab.EvaluateJavaScript('1 + 1'))
      after_browser_run_temp_dir_content = os.listdir(tempfile.tempdir)
      self.assertEqual(before_browser_run_temp_dir_content,
                       after_browser_run_temp_dir_content)
    finally:
      browser_to_create.platform.network_controller.Close()