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from __future__ import unicode_literals
from __future__ import division
from __future__ import absolute_import
from __future__ import print_function

import sys
from system_test import TestCase, Qdrouterd, main_module
from system_test import unittest
from proton.utils import BlockingConnection


class MaxFrameMaxSessionFramesTest(TestCase):
    """System tests setting proton negotiated size max-frame-size and incoming-window"""
    @classmethod
    def setUpClass(cls):
        """Start a router"""
        super(MaxFrameMaxSessionFramesTest, cls).setUpClass()
        name = "MaxFrameMaxSessionFrames"
        config = Qdrouterd.Config([
            ('router', {'mode': 'standalone', 'id': 'QDR'}),

            ('listener', {'host': '0.0.0.0', 'port': cls.tester.get_port(), 'maxFrameSize': '2048', 'maxSessionFrames': '10'}),
        ])
        cls.router = cls.tester.qdrouterd(name, config)
        cls.router.wait_ready()
        cls.address = cls.router.addresses[0]

    def test_max_frame_max_session_frames__max_sessions_default(self):
        # Set up a connection to get the Open and a receiver to get a Begin frame in the log
        bc = BlockingConnection(self.router.addresses[0])
        bc.create_receiver("xxx")
        bc.close()

        with open('../setUpClass/MaxFrameMaxSessionFrames.log', 'r') as router_log:
            log_lines = router_log.read().split("\n")
            open_lines = [s for s in log_lines if "-> @open" in s]
            # max-frame is from the config
            self.assertIn(' max-frame-size=2048,', open_lines[0])
            # channel-max is default
            self.assertIn(" channel-max=32767", open_lines[0])
            begin_lines = [s for s in log_lines if "-> @begin" in s]
            # incoming-window is from the config
            self.assertIn(" incoming-window=10,", begin_lines[0])


class MaxSessionsTest(TestCase):
    """System tests setting proton channel-max"""
    @classmethod
    def setUpClass(cls):
        """Start a router and a messenger"""
        super(MaxSessionsTest, cls).setUpClass()
        name = "MaxSessions"
        config = Qdrouterd.Config([
            ('router', {'mode': 'standalone', 'id': 'QDR'}),

            ('listener', {'host': '0.0.0.0', 'port': cls.tester.get_port(), 'maxSessions': '10'}),
        ])
        cls.router = cls.tester.qdrouterd(name, config)
        cls.router.wait_ready()
        cls.address = cls.router.addresses[0]

    def test_max_sessions(self):
        # Set up a connection to get the Open and a receiver to get a Begin frame in the log
        bc = BlockingConnection(self.router.addresses[0])
        bc.create_receiver("xxx")
        bc.close()

        with open('../setUpClass/MaxSessions.log', 'r') as router_log:
            log_lines = router_log.read().split("\n")
            open_lines = [s for s in log_lines if "-> @open" in s]
            # channel-max is 9
            self.assertIn(" channel-max=9", open_lines[0])


class MaxSessionsZeroTest(TestCase):
    """System tests setting proton channel-max"""
    @classmethod
    def setUpClass(cls):
        """Start a router and a messenger"""
        super(MaxSessionsZeroTest, cls).setUpClass()
        name = "MaxSessionsZero"
        config = Qdrouterd.Config([
            ('router', {'mode': 'standalone', 'id': 'QDR'}),

            ('listener', {'host': '0.0.0.0', 'port': cls.tester.get_port(), 'maxSessions': '0'}),
        ])
        cls.router = cls.tester.qdrouterd(name, config)
        cls.router.wait_ready()
        cls.address = cls.router.addresses[0]

    def test_max_sessions_zero(self):
        # Set up a connection to get the Open and a receiver to get a Begin frame in the log
        bc = BlockingConnection(self.router.addresses[0])
        bc.create_receiver("xxx")
        bc.close()

        with open('../setUpClass/MaxSessionsZero.log', 'r') as router_log:
            log_lines = router_log.read().split("\n")
            open_lines = [s for s in log_lines if "-> @open" in s]
            # channel-max is 0. Should get proton default 32767
            self.assertIn(" channel-max=32767", open_lines[0])


class MaxSessionsLargeTest(TestCase):
    """System tests setting proton channel-max"""
    @classmethod
    def setUpClass(cls):
        """Start a router and a messenger"""
        super(MaxSessionsLargeTest, cls).setUpClass()
        name = "MaxSessionsLarge"
        config = Qdrouterd.Config([
            ('router', {'mode': 'standalone', 'id': 'QDR'}),

            ('listener', {'host': '0.0.0.0', 'port': cls.tester.get_port(), 'maxSessions': '500000'}),
        ])
        cls.router = cls.tester.qdrouterd(name, config)
        cls.router.wait_ready()
        cls.address = cls.router.addresses[0]

    def test_max_sessions_large(self):
        # Set up a connection to get the Open and a receiver to get a Begin frame in the log
        bc = BlockingConnection(self.router.addresses[0])
        bc.create_receiver("xxx")
        bc.close()

        with open('../setUpClass/MaxSessionsLarge.log', 'r') as router_log:
            log_lines = router_log.read().split("\n")
            open_lines = [s for s in log_lines if "-> @open" in s]
            # channel-max is 0. Should get proton default 32767
            self.assertIn(" channel-max=32767", open_lines[0])


class MaxFrameSmallTest(TestCase):
    """System tests setting proton max-frame-size"""
    @classmethod
    def setUpClass(cls):
        """Start a router and a messenger"""
        super(MaxFrameSmallTest, cls).setUpClass()
        name = "MaxFrameSmall"
        config = Qdrouterd.Config([
            ('router', {'mode': 'standalone', 'id': 'QDR'}),

            ('listener', {'host': '0.0.0.0', 'port': cls.tester.get_port(), 'maxFrameSize': '2'}),
        ])
        cls.router = cls.tester.qdrouterd(name, config)
        cls.router.wait_ready()
        cls.address = cls.router.addresses[0]

    def test_max_frame_small(self):
        # Set up a connection to get the Open and a receiver to get a Begin frame in the log
        bc = BlockingConnection(self.router.addresses[0])
        bc.create_receiver("xxx")
        bc.close()

        with open('../setUpClass/MaxFrameSmall.log', 'r') as router_log:
            log_lines = router_log.read().split("\n")
            open_lines = [s for s in log_lines if "-> @open" in s]
            # if frame size <= 512 proton set min of 512
            self.assertIn(" max-frame-size=512", open_lines[0])


class MaxFrameDefaultTest(TestCase):
    """System tests setting proton max-frame-size"""
    @classmethod
    def setUpClass(cls):
        """Start a router and a messenger"""
        super(MaxFrameDefaultTest, cls).setUpClass()
        name = "MaxFrameDefault"
        config = Qdrouterd.Config([
            ('router', {'mode': 'standalone', 'id': 'QDR'}),

            ('listener', {'host': '0.0.0.0', 'port': cls.tester.get_port()}),
        ])
        cls.router = cls.tester.qdrouterd(name, config)
        cls.router.wait_ready()
        cls.address = cls.router.addresses[0]

    def test_max_frame_default(self):
        # Set up a connection to get the Open and a receiver to get a Begin frame in the log
        bc = BlockingConnection(self.router.addresses[0])
        bc.create_receiver("xxx")
        bc.close()

        with open('../setUpClass/MaxFrameDefault.log', 'r') as router_log:
            log_lines = router_log.read().split("\n")
            open_lines = [s for s in log_lines if "-> @open" in s]
            # if frame size not set then a default is used
            self.assertIn(" max-frame-size=16384", open_lines[0])


class MaxSessionFramesDefaultTest(TestCase):
    """System tests setting proton max-frame-size"""
    @classmethod
    def setUpClass(cls):
        """Start a router and a messenger"""
        super(MaxSessionFramesDefaultTest, cls).setUpClass()
        name = "MaxSessionFramesDefault"
        config = Qdrouterd.Config([
            ('router', {'mode': 'standalone', 'id': 'QDR'}),

            ('listener', {'host': '0.0.0.0', 'port': cls.tester.get_port()}),
        ])
        cls.router = cls.tester.qdrouterd(name, config)
        cls.router.wait_ready()
        cls.address = cls.router.addresses[0]

    def test_max_session_frames_default(self):
        # Set up a connection to get the Open and a receiver to get a Begin frame in the log
        bc = BlockingConnection(self.router.addresses[0])
        bc.create_receiver("xxx")
        bc.close()

        with open('../setUpClass/MaxSessionFramesDefault.log', 'r') as router_log:
            log_lines = router_log.read().split("\n")
            open_lines = [s for s in log_lines if "-> @open" in s]
            # if frame size not set then a default is used
            self.assertIn(" max-frame-size=16384", open_lines[0])
            begin_lines = [s for s in log_lines if "-> @begin" in s]
            # incoming-window should be 2^31-1 (64-bit) or
            # (2^31-1) / max-frame-size (32-bit)
            is_64bits = sys.maxsize > 2 ** 32
            expected = " incoming-window=2147483647," if is_64bits else \
                (" incoming-window=%d," % int(2147483647 / 16384))
            #self.assertIn(expected, begin_lines[0], "Expected:'%s' not found in '%s'" % (expected, begin_lines[0]))
            self.assertIn(expected, begin_lines[0])


class MaxFrameMaxSessionFramesZeroTest(TestCase):
    """
    System tests setting proton negotiated size max-frame-size and incoming-window
    when they are both zero. Frame size is bumped up to the minimum and capacity is
    bumped up to have an incoming window of 1
    """
    @classmethod
    def setUpClass(cls):
        """Start a router"""
        super(MaxFrameMaxSessionFramesZeroTest, cls).setUpClass()
        name = "MaxFrameMaxSessionFramesZero"
        config = Qdrouterd.Config([
            ('router', {'mode': 'standalone', 'id': 'QDR'}),

            ('listener', {'host': '0.0.0.0', 'port': cls.tester.get_port(), 'maxFrameSize': '0', 'maxSessionFrames': '0'}),
        ])
        cls.router = cls.tester.qdrouterd(name, config)
        cls.router.wait_ready()
        cls.address = cls.router.addresses[0]

    def test_max_frame_max_session_zero(self):
        # Set up a connection to get the Open and a receiver to get a Begin frame in the log
        bc = BlockingConnection(self.router.addresses[0])
        bc.create_receiver("xxx")
        bc.close()

        with open('../setUpClass/MaxFrameMaxSessionFramesZero.log', 'r') as router_log:
            log_lines = router_log.read().split("\n")
            open_lines = [s for s in log_lines if "-> @open" in s]
            # max-frame gets set to protocol min
            self.assertIn(' max-frame-size=512,', open_lines[0])
            begin_lines = [s for s in log_lines if "-> @begin" in s]
            # incoming-window should be 2^31-1 (64-bit) or
            # (2^31-1) / max-frame-size (32-bit)
            is_64bits = sys.maxsize > 2 ** 32
            expected = " incoming-window=2147483647," if is_64bits else \
                (" incoming-window=%d," % int(2147483647 / 512))
            self.assertIn(expected, begin_lines[0])


class ConnectorSettingsDefaultTest(TestCase):
    """
    The internal logic for protocol settings in listener and connector
    is common code. This test makes sure that defaults in the connector
    config make it to the wire.
    """
    inter_router_port = None

    @staticmethod
    def ssl_config(client_server, connection):
        return []  # Over-ridden by RouterTestSsl

    @classmethod
    def setUpClass(cls):
        """Start two routers"""
        super(ConnectorSettingsDefaultTest, cls).setUpClass()

        def router(name, client_server, connection):
            config = cls.ssl_config(client_server, connection) + [
                ('router', {'mode': 'interior', 'id': 'QDR.%s' % name}),

                ('listener', {'port': cls.tester.get_port()}),
                connection
            ]

            config = Qdrouterd.Config(config)

            cls.routers.append(cls.tester.qdrouterd(name, config, wait=True))

        cls.routers = []

        inter_router_port = cls.tester.get_port()

        router('A', 'server',
               ('listener', {'role': 'inter-router', 'port': inter_router_port}))
        router('B', 'client',
               ('connector', {'name': 'connectorToA', 'role': 'inter-router', 'port': inter_router_port}))

        cls.routers[0].wait_router_connected('QDR.B')
        cls.routers[1].wait_router_connected('QDR.A')

    def test_connector_default(self):
        with open('../setUpClass/A.log', 'r') as router_log:
            log_lines = router_log.read().split("\n")
            open_lines = [s for s in log_lines if "<- @open" in s]
            # defaults
            self.assertIn(' max-frame-size=16384,', open_lines[0])
            self.assertIn(' channel-max=32767,', open_lines[0])
            begin_lines = [s for s in log_lines if "<- @begin" in s]
            # incoming-window should be 2^31-1 (64-bit) or
            # (2^31-1) / max-frame-size (32-bit)
            is_64bits = sys.maxsize > 2 ** 32
            expected = " incoming-window=2147483647," if is_64bits else \
                (" incoming-window=%d," % int(2147483647 / 16384))
            self.assertIn(expected, begin_lines[0])


class ConnectorSettingsNondefaultTest(TestCase):
    """
    The internal logic for protocol settings in listener and connector
    is common code. This test makes sure that settings in the connector
    config make it to the wire. The listener tests test the setting logic.
    """
    inter_router_port = None

    @staticmethod
    def ssl_config(client_server, connection):
        return []  # Over-ridden by RouterTestSsl

    @classmethod
    def setUpClass(cls):
        """Start two routers"""
        super(ConnectorSettingsNondefaultTest, cls).setUpClass()

        def router(name, client_server, connection):
            config = cls.ssl_config(client_server, connection) + [
                ('router', {'mode': 'interior', 'id': 'QDR.%s' % name}),

                ('listener', {'port': cls.tester.get_port()}),
                connection
            ]

            config = Qdrouterd.Config(config)

            cls.routers.append(cls.tester.qdrouterd(name, config, wait=True))

        cls.routers = []

        inter_router_port = cls.tester.get_port()

        router('A', 'server',
               ('listener', {'role': 'inter-router', 'port': inter_router_port}))
        router('B', 'client',
               ('connector', {'name': 'connectorToA', 'role': 'inter-router', 'port': inter_router_port,
                              'maxFrameSize': '2048', 'maxSessionFrames': '10', 'maxSessions': '20'}))

        cls.routers[0].wait_router_connected('QDR.B')
        cls.routers[1].wait_router_connected('QDR.A')

    def test_connector_default(self):
        with open('../setUpClass/A.log', 'r') as router_log:
            log_lines = router_log.read().split("\n")
            open_lines = [s for s in log_lines if "<- @open" in s]
            # nondefaults
            self.assertIn(' max-frame-size=2048,', open_lines[0])
            self.assertIn(' channel-max=19,', open_lines[0])
            begin_lines = [s for s in log_lines if "<- @begin" in s]
            # nondefaults
            SEARCH_STRING = " incoming-window=10,"
            # Sometimes, the begin frame we are looking for might not be
            # the first in the list. We just need to make sure that
            # it is somewhere in the list
            line_found = False
            for begin_line in begin_lines:
                if SEARCH_STRING in begin_line:
                    line_found = True
                    break

            self.assertTrue(line_found)


if __name__ == '__main__':
    unittest.main(main_module())