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"""Unit testing base class for Port implementations."""

import errno
import logging
import os
import socket
import sys
import time
import webkitpy.thirdparty.unittest2 as unittest

from webkitpy.common.system.executive_mock import MockExecutive
from webkitpy.common.system.filesystem_mock import MockFileSystem
from webkitpy.common.system.outputcapture import OutputCapture
from webkitpy.common.system.systemhost_mock import MockSystemHost
from webkitpy.layout_tests.port.base import Port
from webkitpy.layout_tests.port.server_process_mock import MockServerProcess
from webkitpy.layout_tests.servers import http_server_base
from webkitpy.tool.mocktool import MockOptions


# FIXME: get rid of this fixture
class TestWebKitPort(Port):
    port_name = "testwebkitport"

    def __init__(self, port_name=None, symbols_string=None,
                 expectations_file=None, skips_file=None, host=None, config=None,
                 **kwargs):
        port_name = port_name or TestWebKitPort.port_name
        self.symbols_string = symbols_string  # Passing "" disables all staticly-detectable features.
        host = host or MockSystemHost()
        super(TestWebKitPort, self).__init__(host, port_name=port_name, **kwargs)

    def all_test_configurations(self):
        return [self.test_configuration()]

    def _symbols_string(self):
        return self.symbols_string

    def _tests_for_disabled_features(self):
        return ["accessibility", ]


class PortTestCase(unittest.TestCase):
    """Tests that all Port implementations must pass."""
    HTTP_PORTS = (8000, 8080, 8443)
    WEBSOCKET_PORTS = (8880,)

    # Subclasses override this to point to their Port subclass.
    os_name = None
    os_version = None
    port_maker = TestWebKitPort
    port_name = None

    def make_port(self, host=None, port_name=None, options=None, os_name=None, os_version=None, **kwargs):
        host = host or MockSystemHost(os_name=(os_name or self.os_name), os_version=(os_version or self.os_version))
        options = options or MockOptions(configuration='Release')
        port_name = port_name or self.port_name
        port_name = self.port_maker.determine_full_port_name(host, options, port_name)
        port = self.port_maker(host, port_name, options=options, **kwargs)
        port._config.build_directory = lambda configuration: '/mock-build'
        return port

    def make_wdiff_available(self, port):
        port._wdiff_available = True

    def test_default_max_locked_shards(self):
        port = self.make_port()
        port.default_child_processes = lambda: 16
        self.assertEqual(port.default_max_locked_shards(), 1)
        port.default_child_processes = lambda: 2
        self.assertEqual(port.default_max_locked_shards(), 1)

    def test_default_timeout_ms(self):
        self.assertEqual(self.make_port(options=MockOptions(configuration='Release')).default_timeout_ms(), 6000)
        self.assertEqual(self.make_port(options=MockOptions(configuration='Debug')).default_timeout_ms(), 36000)

    def test_default_pixel_tests(self):
        self.assertEqual(self.make_port().default_pixel_tests(), True)

    def test_driver_cmd_line(self):
        port = self.make_port()
        self.assertTrue(len(port.driver_cmd_line()))

        options = MockOptions(additional_drt_flag=['--foo=bar', '--foo=baz'])
        port = self.make_port(options=options)
        cmd_line = port.driver_cmd_line()
        self.assertTrue('--foo=bar' in cmd_line)
        self.assertTrue('--foo=baz' in cmd_line)

    def test_uses_apache(self):
        self.assertTrue(self.make_port()._uses_apache())

    def assert_servers_are_down(self, host, ports):
        for port in ports:
            try:
                test_socket = socket.socket()
                test_socket.connect((host, port))
                self.fail()
            except IOError, e:
                self.assertTrue(e.errno in (errno.ECONNREFUSED, errno.ECONNRESET))
            finally:
                test_socket.close()

    def assert_servers_are_up(self, host, ports):
        for port in ports:
            try:
                test_socket = socket.socket()
                test_socket.connect((host, port))
            except IOError, e:
                self.fail('failed to connect to %s:%d' % (host, port))
            finally:
                test_socket.close()

    def test_diff_image__missing_both(self):
        port = self.make_port()
        self.assertEqual(port.diff_image(None, None), (None, None))
        self.assertEqual(port.diff_image(None, ''), (None, None))
        self.assertEqual(port.diff_image('', None), (None, None))

        self.assertEqual(port.diff_image('', ''), (None, None))

    def test_diff_image__missing_actual(self):
        port = self.make_port()
        self.assertEqual(port.diff_image(None, 'foo'), ('foo', None))
        self.assertEqual(port.diff_image('', 'foo'), ('foo', None))

    def test_diff_image__missing_expected(self):
        port = self.make_port()
        self.assertEqual(port.diff_image('foo', None), ('foo', None))
        self.assertEqual(port.diff_image('foo', ''), ('foo', None))

    def test_diff_image(self):
        port = self.make_port()
        self.proc = None

        def make_proc(port, nm, cmd, env):
            self.proc = MockServerProcess(port, nm, cmd, env, lines=['diff: 100% failed\n', 'diff: 100% failed\n'])
            return self.proc

        port._server_process_constructor = make_proc
        port.setup_test_run()
        self.assertEqual(port.diff_image('foo', 'bar'), ('', 100.0, None))

        port.clean_up_test_run()
        self.assertTrue(self.proc.stopped)
        self.assertEqual(port._image_differ, None)

    def test_check_wdiff(self):
        port = self.make_port()
        port.check_wdiff()

    def test_wdiff_text_fails(self):
        host = MockSystemHost(os_name=self.os_name, os_version=self.os_version)
        host.executive = MockExecutive(should_throw=True)
        port = self.make_port(host=host)
        port._executive = host.executive  # AndroidPortTest.make_port sets its own executive, so reset that as well.

        # This should raise a ScriptError that gets caught and turned into the
        # error text, and also mark wdiff as not available.
        self.make_wdiff_available(port)
        self.assertTrue(port.wdiff_available())
        diff_txt = port.wdiff_text("/tmp/foo.html", "/tmp/bar.html")
        self.assertEqual(diff_txt, port._wdiff_error_html)
        self.assertFalse(port.wdiff_available())

    def test_test_configuration(self):
        port = self.make_port()
        self.assertTrue(port.test_configuration())

    def test_all_test_configurations(self):
        port = self.make_port()
        self.assertTrue(len(port.all_test_configurations()) > 0)
        self.assertTrue(port.test_configuration() in port.all_test_configurations(), "%s not in %s" % (port.test_configuration(), port.all_test_configurations()))

    def test_get_crash_log(self):
        port = self.make_port()
        self.assertEqual(port._get_crash_log(None, None, None, None, newer_than=None),
           (None,
            'crash log for <unknown process name> (pid <unknown>):\n'
            'STDOUT: <empty>\n'
            'STDERR: <empty>\n'))

        self.assertEqual(port._get_crash_log('foo', 1234, 'out bar\nout baz', 'err bar\nerr baz\n', newer_than=None),
            ('err bar\nerr baz\n',
             'crash log for foo (pid 1234):\n'
             'STDOUT: out bar\n'
             'STDOUT: out baz\n'
             'STDERR: err bar\n'
             'STDERR: err baz\n'))

        self.assertEqual(port._get_crash_log('foo', 1234, 'foo\xa6bar', 'foo\xa6bar', newer_than=None),
            ('foo\xa6bar',
             u'crash log for foo (pid 1234):\n'
             u'STDOUT: foo\ufffdbar\n'
             u'STDERR: foo\ufffdbar\n'))

        self.assertEqual(port._get_crash_log('foo', 1234, 'foo\xa6bar', 'foo\xa6bar', newer_than=1.0),
            ('foo\xa6bar',
             u'crash log for foo (pid 1234):\n'
             u'STDOUT: foo\ufffdbar\n'
             u'STDERR: foo\ufffdbar\n'))

    def assert_build_path(self, options, dirs, expected_path):
        port = self.make_port(options=options)
        for directory in dirs:
            port.host.filesystem.maybe_make_directory(directory)
        self.assertEqual(port._build_path(), expected_path)

    def test_expectations_ordering(self):
        port = self.make_port()
        for path in port.expectations_files():
            port._filesystem.write_text_file(path, '')
        ordered_dict = port.expectations_dict()
        self.assertEqual(port.path_to_generic_test_expectations_file(), ordered_dict.keys()[0])

        options = MockOptions(additional_expectations=['/tmp/foo', '/tmp/bar'])
        port = self.make_port(options=options)
        for path in port.expectations_files():
            port._filesystem.write_text_file(path, '')
        port._filesystem.write_text_file('/tmp/foo', 'foo')
        port._filesystem.write_text_file('/tmp/bar', 'bar')
        ordered_dict = port.expectations_dict()
        self.assertEqual(ordered_dict.keys()[-2:], options.additional_expectations)  # pylint: disable=E1101
        self.assertEqual(ordered_dict.values()[-2:], ['foo', 'bar'])

    def test_skipped_directories_for_symbols(self):
        # This first test confirms that the commonly found symbols result in the expected skipped directories.
        symbols_string = " ".join(["fooSymbol"])
        expected_directories = set([
            "webaudio/codec-tests/mp3",
            "webaudio/codec-tests/aac",
        ])

        result_directories = set(TestWebKitPort(symbols_string=symbols_string)._skipped_tests_for_unsupported_features(test_list=['webaudio/codec-tests/mp3/foo.html']))
        self.assertEqual(result_directories, expected_directories)

        # Test that the nm string parsing actually works:
        symbols_string = """
000000000124f498 s __ZZN7WebCore13ff_mp3_decoder12replaceChildEPS0_S1_E19__PRETTY_FUNCTION__
000000000124f500 s __ZZN7WebCore13ff_mp3_decoder13addChildAboveEPS0_S1_E19__PRETTY_FUNCTION__
000000000124f670 s __ZZN7WebCore13ff_mp3_decoder13addChildBelowEPS0_S1_E19__PRETTY_FUNCTION__
"""
        # Note 'compositing' is not in the list of skipped directories (hence the parsing of GraphicsLayer worked):
        expected_directories = set([
            "webaudio/codec-tests/aac",
        ])
        result_directories = set(TestWebKitPort(symbols_string=symbols_string)._skipped_tests_for_unsupported_features(test_list=['webaudio/codec-tests/mp3/foo.html']))
        self.assertEqual(result_directories, expected_directories)

    def test_expectations_files(self):
        port = TestWebKitPort()

        def platform_dirs(port):
            return [port.host.filesystem.basename(port.host.filesystem.dirname(f)) for f in port.expectations_files()]

        self.assertEqual(platform_dirs(port), ['LayoutTests', 'testwebkitport'])

        port = TestWebKitPort(port_name="testwebkitport-version")
        self.assertEqual(platform_dirs(port), ['LayoutTests', 'testwebkitport', 'testwebkitport-version'])

        port = TestWebKitPort(port_name="testwebkitport-version",
                              options=MockOptions(additional_platform_directory=["internal-testwebkitport"]))
        self.assertEqual(platform_dirs(port), ['LayoutTests', 'testwebkitport', 'testwebkitport-version', 'internal-testwebkitport'])

    def test_test_expectations(self):
        # Check that we read the expectations file
        host = MockSystemHost()
        host.filesystem.write_text_file('/mock-checkout/LayoutTests/platform/testwebkitport/TestExpectations',
            'BUG_TESTEXPECTATIONS SKIP : fast/html/article-element.html = FAIL\n')
        port = TestWebKitPort(host=host)
        self.assertEqual(''.join(port.expectations_dict().values()), 'BUG_TESTEXPECTATIONS SKIP : fast/html/article-element.html = FAIL\n')

    def _assert_config_file_for_platform(self, port, platform, config_file):
        self.assertEqual(port._apache_config_file_name_for_platform(platform), config_file)

    def test_linux_distro_detection(self):
        port = TestWebKitPort()
        self.assertFalse(port._is_redhat_based())
        self.assertFalse(port._is_debian_based())

        port._filesystem = MockFileSystem({'/etc/redhat-release': ''})
        self.assertTrue(port._is_redhat_based())
        self.assertFalse(port._is_debian_based())

        port._filesystem = MockFileSystem({'/etc/debian_version': ''})
        self.assertFalse(port._is_redhat_based())
        self.assertTrue(port._is_debian_based())

    def test_apache_config_file_name_for_platform(self):
        port = TestWebKitPort()
        self._assert_config_file_for_platform(port, 'cygwin', 'cygwin-httpd.conf')

        self._assert_config_file_for_platform(port, 'linux2', 'apache2-httpd.conf')
        self._assert_config_file_for_platform(port, 'linux3', 'apache2-httpd.conf')

        port._is_redhat_based = lambda: True
        port._apache_version = lambda: '2.2'
        self._assert_config_file_for_platform(port, 'linux2', 'fedora-httpd-2.2.conf')

        port = TestWebKitPort()
        port._is_debian_based = lambda: True
        self._assert_config_file_for_platform(port, 'linux2', 'apache2-debian-httpd.conf')

        self._assert_config_file_for_platform(port, 'mac', 'apache2-httpd.conf')
        self._assert_config_file_for_platform(port, 'win32', 'apache2-httpd.conf')  # win32 isn't a supported sys.platform.  AppleWin/WinCairo/WinCE ports all use cygwin.
        self._assert_config_file_for_platform(port, 'barf', 'apache2-httpd.conf')

    def test_path_to_apache_config_file(self):
        port = TestWebKitPort()

        saved_environ = os.environ.copy()
        try:
            os.environ['WEBKIT_HTTP_SERVER_CONF_PATH'] = '/path/to/httpd.conf'
            self.assertRaises(IOError, port._path_to_apache_config_file)
            port._filesystem.write_text_file('/existing/httpd.conf', 'Hello, world!')
            os.environ['WEBKIT_HTTP_SERVER_CONF_PATH'] = '/existing/httpd.conf'
            self.assertEqual(port._path_to_apache_config_file(), '/existing/httpd.conf')
        finally:
            os.environ = saved_environ.copy()

        # Mock out _apache_config_file_name_for_platform to ignore the passed sys.platform value.
        port._apache_config_file_name_for_platform = lambda platform: 'httpd.conf'
        self.assertEqual(port._path_to_apache_config_file(), '/mock-checkout/LayoutTests/http/conf/httpd.conf')

        # Check that even if we mock out _apache_config_file_name, the environment variable takes precedence.
        saved_environ = os.environ.copy()
        try:
            os.environ['WEBKIT_HTTP_SERVER_CONF_PATH'] = '/existing/httpd.conf'
            self.assertEqual(port._path_to_apache_config_file(), '/existing/httpd.conf')
        finally:
            os.environ = saved_environ.copy()

    def test_additional_platform_directory(self):
        port = self.make_port(options=MockOptions(additional_platform_directory=['/tmp/foo']))
        self.assertEqual(port.baseline_search_path()[0], '/tmp/foo')