from __future__ import absolute_import

import sys

import unittest

import zlib

from mercurial import (

    error,

    ui as uimod,

    wireprotoframing as framing,

)

from mercurial.utils import cborutil

try:

    from mercurial import zstd

    zstd.__version__

except ImportError:

    zstd = None

ffs = framing.makeframefromhumanstring

globalui = uimod.ui()

def sendframe(reactor, frame):

    """Send a frame bytearray to a reactor."""

    header = framing.parseheader(frame)

    payload = frame[framing.FRAME_HEADER_SIZE :]

    assert len(payload) == header.length

    return reactor.onframerecv(

        framing.frame(

            header.requestid,

            header.streamid,

            header.streamflags,

            header.typeid,

            header.flags,

            payload,

        )

    )

class SingleSendTests(unittest.TestCase):

    """A reactor that can only send once rejects subsequent sends."""

    if not getattr(unittest.TestCase, 'assertRaisesRegex', False):

        # Python 3.7 deprecates the regex*p* version, but 2.7 lacks

        # the regex version.

        assertRaisesRegex = (  # camelcase-required

            unittest.TestCase.assertRaisesRegexp

        )

    def testbasic(self):

        reactor = framing.clientreactor(

            globalui, hasmultiplesend=False, buffersends=True

        )

        request, action, meta = reactor.callcommand(b'foo', {})

        self.assertEqual(request.state, b'pending')

        self.assertEqual(action, b'noop')

        action, meta = reactor.flushcommands()

        self.assertEqual(action, b'sendframes')

        for frame in meta[b'framegen']:

            self.assertEqual(request.state, b'sending')

        self.assertEqual(request.state, b'sent')

        with self.assertRaisesRegex(

            error.ProgrammingError, 'cannot issue new commands'

        ):

            reactor.callcommand(b'foo', {})

        with self.assertRaisesRegex(

            error.ProgrammingError, 'cannot issue new commands'

        ):

            reactor.callcommand(b'foo', {})

class NoBufferTests(unittest.TestCase):

    """A reactor without send buffering sends requests immediately."""

    def testbasic(self):

        reactor = framing.clientreactor(

            globalui, hasmultiplesend=True, buffersends=False

        )

        request, action, meta = reactor.callcommand(b'command1', {})

        self.assertEqual(request.requestid, 1)

        self.assertEqual(action, b'sendframes')

        self.assertEqual(request.state, b'pending')

        for frame in meta[b'framegen']:

            self.assertEqual(request.state, b'sending')

        self.assertEqual(request.state, b'sent')

        action, meta = reactor.flushcommands()

        self.assertEqual(action, b'noop')

        # And we can send another command.

        request, action, meta = reactor.callcommand(b'command2', {})

        self.assertEqual(request.requestid, 3)

        self.assertEqual(action, b'sendframes')

        for frame in meta[b'framegen']:

            self.assertEqual(request.state, b'sending')

        self.assertEqual(request.state, b'sent')

class BadFrameRecvTests(unittest.TestCase):

    if not getattr(unittest.TestCase, 'assertRaisesRegex', False):

        # Python 3.7 deprecates the regex*p* version, but 2.7 lacks

        # the regex version.

        assertRaisesRegex = (  # camelcase-required

            unittest.TestCase.assertRaisesRegexp

        )

    def testoddstream(self):

        reactor = framing.clientreactor(globalui)

        action, meta = sendframe(reactor, ffs(b'1 1 0 1 0 foo'))

        self.assertEqual(action, b'error')

        self.assertEqual(

            meta[b'message'], b'received frame with odd numbered stream ID: 1'

        )

    def testunknownstream(self):

        reactor = framing.clientreactor(globalui)

        action, meta = sendframe(reactor, ffs(b'1 0 0 1 0 foo'))

        self.assertEqual(action, b'error')

        self.assertEqual(

            meta[b'message'],

            b'received frame on unknown stream without beginning '

            b'of stream flag set',

        )

    def testunhandledframetype(self):

        reactor = framing.clientreactor(globalui, buffersends=False)

        request, action, meta = reactor.callcommand(b'foo', {})

        for frame in meta[b'framegen']:

            pass

        with self.assertRaisesRegex(

            error.ProgrammingError, 'unhandled frame type'

        ):

            sendframe(reactor, ffs(b'1 0 stream-begin text-output 0 foo'))

class StreamTests(unittest.TestCase):

    def testmultipleresponseframes(self):

        reactor = framing.clientreactor(globalui, buffersends=False)

        request, action, meta = reactor.callcommand(b'foo', {})

        self.assertEqual(action, b'sendframes')

        for f in meta[b'framegen']:

            pass

        action, meta = sendframe(

            reactor,

            ffs(

                b'%d 0 stream-begin command-response 0 foo' % request.requestid

            ),

        )

        self.assertEqual(action, b'responsedata')

        action, meta = sendframe(

            reactor, ffs(b'%d 0 0 command-response eos bar' % request.requestid)

        )

        self.assertEqual(action, b'responsedata')

class RedirectTests(unittest.TestCase):

    def testredirect(self):

        reactor = framing.clientreactor(globalui, buffersends=False)

        redirect = {

            b'targets': [b'a', b'b'],

            b'hashes': [b'sha256'],

        }

        request, action, meta = reactor.callcommand(

            b'foo', {}, redirect=redirect

        )

        self.assertEqual(action, b'sendframes')

        frames = list(meta[b'framegen'])

        self.assertEqual(len(frames), 1)

        self.assertEqual(

            frames[0],

            ffs(

                b'1 1 stream-begin command-request new '

                b"cbor:{b'name': b'foo', "

                b"b'redirect': {b'targets': [b'a', b'b'], "

                b"b'hashes': [b'sha256']}}"

            ),

        )

class StreamSettingsTests(unittest.TestCase):

    def testnoflags(self):

        reactor = framing.clientreactor(globalui, buffersends=False)

        request, action, meta = reactor.callcommand(b'foo', {})

        for f in meta[b'framegen']:

            pass

        action, meta = sendframe(

            reactor, ffs(b'1 2 stream-begin stream-settings 0 ')

        )

        self.assertEqual(action, b'error')

        self.assertEqual(

            meta,

            {

                b'message': b'stream encoding settings frame must have '

                b'continuation or end of stream flag set',

            },

        )

    def testconflictflags(self):

        reactor = framing.clientreactor(globalui, buffersends=False)

        request, action, meta = reactor.callcommand(b'foo', {})

        for f in meta[b'framegen']:

            pass

        action, meta = sendframe(

            reactor, ffs(b'1 2 stream-begin stream-settings continuation|eos ')

        )

        self.assertEqual(action, b'error')

        self.assertEqual(

            meta,

            {

                b'message': b'stream encoding settings frame cannot have both '

                b'continuation and end of stream flags set',

            },

        )

    def testemptypayload(self):

        reactor = framing.clientreactor(globalui, buffersends=False)

        request, action, meta = reactor.callcommand(b'foo', {})

        for f in meta[b'framegen']:

            pass

        action, meta = sendframe(

            reactor, ffs(b'1 2 stream-begin stream-settings eos ')

        )

        self.assertEqual(action, b'error')

        self.assertEqual(

            meta,

            {

                b'message': b'stream encoding settings frame did not contain '

                b'CBOR data'

            },

        )

    def testbadcbor(self):

        reactor = framing.clientreactor(globalui, buffersends=False)

        request, action, meta = reactor.callcommand(b'foo', {})

        for f in meta[b'framegen']:

            pass

        action, meta = sendframe(

            reactor, ffs(b'1 2 stream-begin stream-settings eos badvalue')

        )

        self.assertEqual(action, b'error')

    def testsingleobject(self):

        reactor = framing.clientreactor(globalui, buffersends=False)

        request, action, meta = reactor.callcommand(b'foo', {})

        for f in meta[b'framegen']:

            pass

        action, meta = sendframe(

            reactor,

            ffs(b'1 2 stream-begin stream-settings eos cbor:b"identity"'),

        )

        self.assertEqual(action, b'noop')

        self.assertEqual(meta, {})

    def testmultipleobjects(self):

        reactor = framing.clientreactor(globalui, buffersends=False)

        request, action, meta = reactor.callcommand(b'foo', {})

        for f in meta[b'framegen']:

            pass

        data = b''.join(

            [

                b''.join(cborutil.streamencode(b'identity')),

                b''.join(cborutil.streamencode({b'foo', b'bar'})),

            ]

        )

        action, meta = sendframe(

            reactor, ffs(b'1 2 stream-begin stream-settings eos %s' % data)

        )

        self.assertEqual(action, b'error')

        self.assertEqual(

            meta,

            {

                b'message': b'error setting stream decoder: identity decoder '

                b'received unexpected additional values',

            },

        )

    def testmultipleframes(self):

        reactor = framing.clientreactor(globalui, buffersends=False)

        request, action, meta = reactor.callcommand(b'foo', {})

        for f in meta[b'framegen']:

            pass

        data = b''.join(cborutil.streamencode(b'identity'))

        action, meta = sendframe(

            reactor,

            ffs(

                b'1 2 stream-begin stream-settings continuation %s' % data[0:3]

            ),

        )

        self.assertEqual(action, b'noop')

        self.assertEqual(meta, {})

        action, meta = sendframe(

            reactor, ffs(b'1 2 0 stream-settings eos %s' % data[3:])

        )

        self.assertEqual(action, b'noop')

        self.assertEqual(meta, {})

    def testinvalidencoder(self):

        reactor = framing.clientreactor(globalui, buffersends=False)

        request, action, meta = reactor.callcommand(b'foo', {})

        for f in meta[b'framegen']:

            pass

        action, meta = sendframe(

            reactor,

            ffs(b'1 2 stream-begin stream-settings eos cbor:b"badvalue"'),

        )

        self.assertEqual(action, b'error')

        self.assertEqual(

            meta,

            {

                b'message': b'error setting stream decoder: unknown stream '

                b'decoder: badvalue',

            },

        )

    def testzlibencoding(self):

        reactor = framing.clientreactor(globalui, buffersends=False)

        request, action, meta = reactor.callcommand(b'foo', {})

        for f in meta[b'framegen']:

            pass

        action, meta = sendframe(

            reactor,

            ffs(

                b'%d 2 stream-begin stream-settings eos cbor:b"zlib"'

                % request.requestid

            ),

        )