# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
from io import StringIO, TextIOWrapper
from unittest import TestCase, main
try:
    from contextlib import ExitStack
except ImportError:
    # python 2
    from contextlib2 import ExitStack

try:
    from unittest.mock import MagicMock, Mock, patch
except ImportError:
    from mock import MagicMock, Mock, patch

from ..ansitowin32 import AnsiToWin32, StreamWrapper
from ..win32 import ENABLE_VIRTUAL_TERMINAL_PROCESSING
from .utils import osname


class StreamWrapperTest(TestCase):

    def testIsAProxy(self):
        mockStream = Mock()
        wrapper = StreamWrapper(mockStream, None)
        self.assertTrue( wrapper.random_attr is mockStream.random_attr )

    def testDelegatesWrite(self):
        mockStream = Mock()
        mockConverter = Mock()
        wrapper = StreamWrapper(mockStream, mockConverter)
        wrapper.write('hello')
        self.assertTrue(mockConverter.write.call_args, (('hello',), {}))

    def testDelegatesContext(self):
        mockConverter = Mock()
        s = StringIO()
        with StreamWrapper(s, mockConverter) as fp:
            fp.write(u'hello')
        self.assertTrue(s.closed)

    def testProxyNoContextManager(self):
        mockStream = MagicMock()
        mockStream.__enter__.side_effect = AttributeError()
        mockConverter = Mock()
        with self.assertRaises(AttributeError) as excinfo:
            with StreamWrapper(mockStream, mockConverter) as wrapper:
                wrapper.write('hello')

    def test_closed_shouldnt_raise_on_closed_stream(self):
        stream = StringIO()
        stream.close()
        wrapper = StreamWrapper(stream, None)
        self.assertEqual(wrapper.closed, True)

    def test_closed_shouldnt_raise_on_detached_stream(self):
        stream = TextIOWrapper(StringIO())
        stream.detach()
        wrapper = StreamWrapper(stream, None)
        self.assertEqual(wrapper.closed, True)

class AnsiToWin32Test(TestCase):

    def testInit(self):
        mockStdout = Mock()
        auto = Mock()
        stream = AnsiToWin32(mockStdout, autoreset=auto)
        self.assertEqual(stream.wrapped, mockStdout)
        self.assertEqual(stream.autoreset, auto)

    @patch('colorama.ansitowin32.winterm', None)
    @patch('colorama.ansitowin32.winapi_test', lambda *_: True)
    def testStripIsTrueOnWindows(self):
        with osname('nt'):
            mockStdout = Mock()
            stream = AnsiToWin32(mockStdout)
            self.assertTrue(stream.strip)

    def testStripIsFalseOffWindows(self):
        with osname('posix'):
            mockStdout = Mock(closed=False)
            stream = AnsiToWin32(mockStdout)
            self.assertFalse(stream.strip)

    def testWriteStripsAnsi(self):
        mockStdout = Mock()
        stream = AnsiToWin32(mockStdout)
        stream.wrapped = Mock()
        stream.write_and_convert = Mock()
        stream.strip = True

        stream.write('abc')

        self.assertFalse(stream.wrapped.write.called)
        self.assertEqual(stream.write_and_convert.call_args, (('abc',), {}))

    def testWriteDoesNotStripAnsi(self):
        mockStdout = Mock()
        stream = AnsiToWin32(mockStdout)
        stream.wrapped = Mock()
        stream.write_and_convert = Mock()
        stream.strip = False
        stream.convert = False

        stream.write('abc')

        self.assertFalse(stream.write_and_convert.called)
        self.assertEqual(stream.wrapped.write.call_args, (('abc',), {}))

    def assert_autoresets(self, convert, autoreset=True):
        stream = AnsiToWin32(Mock())
        stream.convert = convert
        stream.reset_all = Mock()
        stream.autoreset = autoreset
        stream.winterm = Mock()

        stream.write('abc')

        self.assertEqual(stream.reset_all.called, autoreset)

    def testWriteAutoresets(self):
        self.assert_autoresets(convert=True)
        self.assert_autoresets(convert=False)
        self.assert_autoresets(convert=True, autoreset=False)
        self.assert_autoresets(convert=False, autoreset=False)

    def testWriteAndConvertWritesPlainText(self):
        stream = AnsiToWin32(Mock())
        stream.write_and_convert( 'abc' )
        self.assertEqual( stream.wrapped.write.call_args, (('abc',), {}) )

    def testWriteAndConvertStripsAllValidAnsi(self):
        stream = AnsiToWin32(Mock())
        stream.call_win32 = Mock()
        data = [
            'abc\033[mdef',
            'abc\033[0mdef',
            'abc\033[2mdef',
            'abc\033[02mdef',
            'abc\033[002mdef',
            'abc\033[40mdef',
            'abc\033[040mdef',
            'abc\033[0;1mdef',
            'abc\033[40;50mdef',
            'abc\033[50;30;40mdef',
            'abc\033[Adef',
            'abc\033[0Gdef',
            'abc\033[1;20;128Hdef',
        ]
        for datum in data:
            stream.wrapped.write.reset_mock()
            stream.write_and_convert( datum )
            self.assertEqual(
               [args[0] for args in stream.wrapped.write.call_args_list],
               [ ('abc',), ('def',) ]
            )

    def testWriteAndConvertSkipsEmptySnippets(self):
        stream = AnsiToWin32(Mock())
        stream.call_win32 = Mock()
        stream.write_and_convert( '\033[40m\033[41m' )
        self.assertFalse( stream.wrapped.write.called )

    def testWriteAndConvertCallsWin32WithParamsAndCommand(self):
        stream = AnsiToWin32(Mock())
        stream.convert = True
        stream.call_win32 = Mock()
        stream.extract_params = Mock(return_value='params')
        data = {
            'abc\033[adef':         ('a', 'params'),
            'abc\033[;;bdef':       ('b', 'params'),
            'abc\033[0cdef':        ('c', 'params'),
            'abc\033[;;0;;Gdef':    ('G', 'params'),
            'abc\033[1;20;128Hdef': ('H', 'params'),
        }
        for datum, expected in data.items():
            stream.call_win32.reset_mock()
            stream.write_and_convert( datum )
            self.assertEqual( stream.call_win32.call_args[0], expected )

    def test_reset_all_shouldnt_raise_on_closed_orig_stdout(self):
        stream = StringIO()
        converter = AnsiToWin32(stream)
        stream.close()

        converter.reset_all()

    def test_wrap_shouldnt_raise_on_closed_orig_stdout(self):
        stream = StringIO()
        stream.close()
        with \
            patch("colorama.ansitowin32.os.name", "nt"), \
            patch("colorama.ansitowin32.winapi_test", lambda: True):
                converter = AnsiToWin32(stream)
        self.assertTrue(converter.strip)
        self.assertFalse(converter.convert)

    def test_wrap_shouldnt_raise_on_missing_closed_attr(self):
        with \
            patch("colorama.ansitowin32.os.name", "nt"), \
            patch("colorama.ansitowin32.winapi_test", lambda: True):
                converter = AnsiToWin32(object())
        self.assertTrue(converter.strip)
        self.assertFalse(converter.convert)

    def testExtractParams(self):
        stream = AnsiToWin32(Mock())
        data = {
            '':               (0,),
            ';;':             (0,),
            '2':              (2,),
            ';;002;;':        (2,),
            '0;1':            (0, 1),
            ';;003;;456;;':   (3, 456),
            '11;22;33;44;55': (11, 22, 33, 44, 55),
        }
        for datum, expected in data.items():
            self.assertEqual(stream.extract_params('m', datum), expected)

    def testCallWin32UsesLookup(self):
        listener = Mock()
        stream = AnsiToWin32(listener)
        stream.win32_calls = {
            1: (lambda *_, **__: listener(11),),
            2: (lambda *_, **__: listener(22),),
            3: (lambda *_, **__: listener(33),),
        }
        stream.call_win32('m', (3, 1, 99, 2))
        self.assertEqual(
            [a[0][0] for a in listener.call_args_list],
            [33, 11, 22] )

    def test_osc_codes(self):
        mockStdout = Mock()
        stream = AnsiToWin32(mockStdout, convert=True)
        with patch('colorama.ansitowin32.winterm') as winterm:
            data = [
                '\033]0\x07',                      # missing arguments
                '\033]0;foo\x08',                  # wrong OSC command
                '\033]0;colorama_test_title\x07',  # should work
                '\033]1;colorama_test_title\x07',  # wrong set command
                '\033]2;colorama_test_title\x07',  # should work
                '\033]' + ';' * 64 + '\x08',       # see issue #247
            ]
            for code in data:
                stream.write(code)
            self.assertEqual(winterm.set_title.call_count, 2)

    def test_native_windows_ansi(self):
        with ExitStack() as stack:
            def p(a, b):
                stack.enter_context(patch(a, b, create=True))
            # Pretend to be on Windows
            p("colorama.ansitowin32.os.name", "nt")
            p("colorama.ansitowin32.winapi_test", lambda: True)
            p("colorama.win32.winapi_test", lambda: True)
            p("colorama.winterm.win32.windll", "non-None")
            p("colorama.winterm.get_osfhandle", lambda _: 1234)

            # Pretend that our mock stream has native ANSI support
            p(
                "colorama.winterm.win32.GetConsoleMode",
                lambda _: ENABLE_VIRTUAL_TERMINAL_PROCESSING,
            )
            SetConsoleMode = Mock()
            p("colorama.winterm.win32.SetConsoleMode", SetConsoleMode)

            stdout = Mock()
            stdout.closed = False
            stdout.isatty.return_value = True
            stdout.fileno.return_value = 1

            # Our fake console says it has native vt support, so AnsiToWin32 should
            # enable that support and do nothing else.
            stream = AnsiToWin32(stdout)
            SetConsoleMode.assert_called_with(1234, ENABLE_VIRTUAL_TERMINAL_PROCESSING)
            self.assertFalse(stream.strip)
            self.assertFalse(stream.convert)
            self.assertFalse(stream.should_wrap())

            # Now let's pretend we're on an old Windows console, that doesn't have
            # native ANSI support.
            p("colorama.winterm.win32.GetConsoleMode", lambda _: 0)
            SetConsoleMode = Mock()
            p("colorama.winterm.win32.SetConsoleMode", SetConsoleMode)

            stream = AnsiToWin32(stdout)
            SetConsoleMode.assert_called_with(1234, ENABLE_VIRTUAL_TERMINAL_PROCESSING)
            self.assertTrue(stream.strip)
            self.assertTrue(stream.convert)
            self.assertTrue(stream.should_wrap())


if __name__ == '__main__':
    main()