#!/usr/bin/env python3
""" Vpp QUIC tests """

import unittest
import os
import subprocess
import signal
from framework import tag_fixme_vpp_workers
from framework import VppTestCase, VppTestRunner, running_extended_tests, \
    Worker
from vpp_ip_route import VppIpTable, VppIpRoute, VppRoutePath


class QUICAppWorker(Worker):
    """ QUIC Test Application Worker """
    process = None

    def __init__(self, build_dir, appname, executable_args, logger, role,
                 testcase, env=None, *args, **kwargs):
        if env is None:
            env = {}
        app = "%s/vpp/bin/%s" % (build_dir, appname)
        self.args = [app] + executable_args
        self.role = role
        self.wait_for_gdb = 'wait-for-gdb'
        self.testcase = testcase
        super(QUICAppWorker, self).__init__(self.args, logger, env,
                                            *args, **kwargs)

    def run(self):
        super(QUICAppWorker, self).run()

    def teardown(self, logger, timeout):
        if self.process is None:
            return False
        try:
            logger.debug("Killing worker process (pid %d)" % self.process.pid)
            os.killpg(os.getpgid(self.process.pid), signal.SIGKILL)
            self.join(timeout)
        except OSError as e:
            logger.debug("Couldn't kill worker process")
            return True
        return False


class QUICTestCase(VppTestCase):
    """ QUIC Test Case """

    timeout = 20
    pre_test_sleep = 0.3
    post_test_sleep = 0.3

    @classmethod
    def setUpClass(cls):
        cls.extra_vpp_plugin_config.append("plugin quic_plugin.so { enable }")
        super(QUICTestCase, cls).setUpClass()

    def setUp(self):
        super(QUICTestCase, self).setUp()
        var = "VPP_BUILD_DIR"
        self.build_dir = os.getenv(var, None)
        if self.build_dir is None:
            raise Exception("Environment variable `%s' not set" % var)
        self.vppDebug = 'vpp_debug' in self.build_dir

        self.create_loopback_interfaces(2)
        self.uri = "quic://%s/1234" % self.loop0.local_ip4
        table_id = 1
        for i in self.lo_interfaces:
            i.admin_up()

            if table_id != 0:
                tbl = VppIpTable(self, table_id)
                tbl.add_vpp_config()

            i.set_table_ip4(table_id)
            i.config_ip4()
            table_id += 1

        # Configure namespaces
        self.vapi.app_namespace_add_del(namespace_id="server",
                                        sw_if_index=self.loop0.sw_if_index)
        self.vapi.app_namespace_add_del(namespace_id="client",
                                        sw_if_index=self.loop1.sw_if_index)

        # Add inter-table routes
        self.ip_t01 = VppIpRoute(self, self.loop1.local_ip4, 32,
                                 [VppRoutePath("0.0.0.0",
                                               0xffffffff,
                                               nh_table_id=2)], table_id=1)
        self.ip_t10 = VppIpRoute(self, self.loop0.local_ip4, 32,
                                 [VppRoutePath("0.0.0.0",
                                               0xffffffff,
                                               nh_table_id=1)], table_id=2)
        self.ip_t01.add_vpp_config()
        self.ip_t10.add_vpp_config()
        self.logger.debug(self.vapi.cli("show ip fib"))

    def tearDown(self):
        # Delete inter-table routes
        self.ip_t01.remove_vpp_config()
        self.ip_t10.remove_vpp_config()

        for i in self.lo_interfaces:
            i.unconfig_ip4()
            i.set_table_ip4(0)
            i.admin_down()
        super(QUICTestCase, self).tearDown()


class QUICEchoIntTestCase(QUICTestCase):
    """QUIC Echo Internal Test Case"""
    test_bytes = ' test-bytes'
    extra_vpp_punt_config = ["session", "{", "enable", "poll-main", "}"]

    def setUp(self):
        super(QUICEchoIntTestCase, self).setUp()
        self.client_args = 'uri {uri} fifo-size 64{testbytes} appns client' \
            .format(uri=self.uri, testbytes=self.test_bytes)
        self.server_args = "uri %s fifo-size 64 appns server" % self.uri

    def tearDown(self):
        super(QUICEchoIntTestCase, self).tearDown()

    def server(self, *args):
        error = self.vapi.cli(
            "test echo server %s %s" %
            (self.server_args, ' '.join(args)))
        if error:
            self.logger.critical(error)
            self.assertNotIn("failed", error)

    def client(self, *args):
        error = self.vapi.cli(
            "test echo client %s %s" %
            (self.client_args, ' '.join(args)))
        if error:
            self.logger.critical(error)
            self.assertNotIn("failed", error)


@tag_fixme_vpp_workers
class QUICEchoIntTransferTestCase(QUICEchoIntTestCase):
    """QUIC Echo Internal Transfer Test Case"""
    def test_quic_int_transfer(self):
        """QUIC internal transfer"""
        self.server()
        self.client("no-output", "mbytes", "2")


@tag_fixme_vpp_workers
class QUICEchoIntSerialTestCase(QUICEchoIntTestCase):
    """QUIC Echo Internal Serial Transfer Test Case"""
    def test_quic_serial_int_transfer(self):
        """QUIC serial internal transfer"""
        self.server()
        self.client("no-output", "mbytes", "2")
        self.client("no-output", "mbytes", "2")
        self.client("no-output", "mbytes", "2")
        self.client("no-output", "mbytes", "2")
        self.client("no-output", "mbytes", "2")


@tag_fixme_vpp_workers
class QUICEchoIntMStreamTestCase(QUICEchoIntTestCase):
    """QUIC Echo Internal MultiStream Test Case"""
    def test_quic_int_multistream_transfer(self):
        """QUIC internal multi-stream transfer"""
        self.server()
        self.client("nclients", "10", "mbytes", "1", "no-output")


class QUICEchoExtTestCase(QUICTestCase):
    quic_setup = "default"
    test_bytes = "test-bytes:assert"
    pre_test_sleep = 1
    post_test_sleep = 1
    app = "vpp_echo"
    evt_q_len = 16384
    vpp_worker_count = 1
    server_fifo_size = "1M"
    client_fifo_size = "4M"
    extra_vpp_punt_config = ["session", "{",
                             "enable", "poll-main", "evt_qs_memfd_seg",
                             "evt_qs_seg_size", "64M",
                             "event-queue-length", f"{evt_q_len}",
                             "preallocated-sessions", "1024",
                             "v4-session-table-buckets", "20000",
                             "v4-session-table-memory", "64M",
                             "v4-halfopen-table-buckets", "20000",
                             "v4-halfopen-table-memory", "64M",
                             "local-endpoints-table-buckets", "250000",
                             "local-endpoints-table-memory", "512M",
                             "}"]

    def setUp(self):
        super(QUICEchoExtTestCase, self).setUp()
        common_args = [
            "uri", self.uri,
            "json",
            self.test_bytes,
            "socket-name", self.get_api_sock_path(),
            "quic-setup", self.quic_setup,
            "nthreads", "1",
            "mq-size", f"{self.evt_q_len}"
        ]
        self.server_echo_test_args = common_args + \
            ["server", "appns", "server", "fifo-size",
             f"{self.server_fifo_size}"]
        self.client_echo_test_args = common_args + \
            ["client", "appns", "client", "fifo-size",
             f"{self.client_fifo_size}"]
        error = self.vapi.cli("quic set fifo-size 2M")
        if error:
            self.logger.critical(error)
            self.assertNotIn("failed", error)

    def server(self, *args):
        _args = self.server_echo_test_args + list(args)
        self.worker_server = QUICAppWorker(
            self.build_dir,
            self.app,
            _args,
            self.logger,
            'server',
            self)
        self.worker_server.start()
        self.sleep(self.pre_test_sleep)

    def client(self, *args):
        _args = self.client_echo_test_args + list(args)
        self.worker_client = QUICAppWorker(
            self.build_dir,
            self.app,
            _args,
            self.logger,
            'client',
            self)
        self.worker_client.start()
        timeout = None if self.debug_all else self.timeout
        self.worker_client.join(timeout)
        if self.worker_client.is_alive():
            error = f"Client failed to complete in {timeout} seconds!"
            self.logger.critical(error)
            return
        self.worker_server.join(timeout)
        if self.worker_server.is_alive():
            error = f"Server failed to complete in {timeout} seconds!"
            self.logger.critical(error)
        self.sleep(self.post_test_sleep)

    def validate_ext_test_results(self):
        server_result = self.worker_server.result
        client_result = self.worker_client.result
        self.logger.info("Server worker result is `%s'" %
                         server_result)
        self.logger.info("Client worker result is `%s'" %
                         client_result)
        server_kill_error = False
        if self.worker_server.result is None:
            server_kill_error = self.worker_server.teardown(
                self.logger, self.timeout)
        if self.worker_client.result is None:
            self.worker_client.teardown(self.logger, self.timeout)
        err_msg = "Wrong server worker return code (%s)" % server_result
        self.assertEqual(server_result, 0, err_msg)
        self.assertIsNotNone(
            client_result,
            "Timeout! Client worker did not finish in %ss" %
            self.timeout)
        err_msg = "Wrong client worker return code (%s)" % client_result
        self.assertEqual(client_result, 0, err_msg)
        self.assertFalse(server_kill_error, "Server kill errored")


class QUICEchoExtTransferTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Test Case"""
    timeout = 60

    def test_quic_ext_transfer(self):
        """QUIC external transfer"""
        self.server()
        self.client()
        self.validate_ext_test_results()


class QUICEchoExtTransferBigTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Big Test Case"""
    server_fifo_size = '4M'
    client_fifo_size = '4M'
    test_bytes = ''
    timeout = 60

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    def test_quic_ext_transfer_big(self):
        """QUIC external transfer, big stream"""
        self.server("TX=0", "RX=2G")
        self.client("TX=2G", "RX=0")
        self.validate_ext_test_results()


class QUICEchoExtQcloseRxTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Qclose Rx Test Case"""

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    @unittest.skip("testcase under development")
    def test_quic_ext_qclose_rx(self):
        """QUIC external transfer, rx close"""
        self.server("TX=0", "RX=10M", "qclose=Y", "sclose=N")
        self.client("TX=10M", "RX=0", "qclose=W", "sclose=W")
        self.validate_ext_test_results()


class QUICEchoExtQcloseTxTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Qclose Tx Test Case"""

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    @unittest.skip("testcase under development")
    def test_quic_ext_qclose_tx(self):
        """QUIC external transfer, tx close"""
        self.server("TX=0", "RX=10M", "qclose=W", "sclose=W",
                    "rx-results-diff")
        self.client("TX=10M", "RX=0", "qclose=Y", "sclose=N")
        self.validate_ext_test_results()


class QUICEchoExtEarlyQcloseRxTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Early Qclose Rx Test Case"""

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    @unittest.skip("testcase under development")
    def test_quic_ext_early_qclose_rx(self):
        """QUIC external transfer, early rx close"""
        self.server("TX=0", "RX=10M", "qclose=Y", "sclose=N")
        self.client("TX=20M", "RX=0", "qclose=W", "sclose=W",
                    "tx-results-diff")
        self.validate_ext_test_results()


class QUICEchoExtEarlyQcloseTxTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Early Qclose Tx Test Case"""

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    @unittest.skip("testcase under development")
    def test_quic_ext_early_qclose_tx(self):
        """QUIC external transfer, early tx close"""
        self.server("TX=0", "RX=20M", "qclose=W", "sclose=W",
                    "rx-results-diff")
        self.client("TX=10M", "RX=0", "qclose=Y", "sclose=N")
        self.validate_ext_test_results()


class QUICEchoExtScloseRxTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Sclose Rx Test Case"""

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    @unittest.skip("testcase under development")
    def test_quic_ext_sclose_rx(self):
        """QUIC external transfer, rx stream close"""
        self.server("TX=0", "RX=10M", "qclose=N", "sclose=Y")
        self.client("TX=10M", "RX=0", "qclose=W", "sclose=W")
        self.validate_ext_test_results()


class QUICEchoExtScloseTxTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Sclose Tx Test Case"""

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    @unittest.skip("testcase under development")
    def test_quic_ext_sclose_tx(self):
        """QUIC external transfer, tx stream close"""
        self.server("TX=0", "RX=10M", "qclose=W", "sclose=W")
        self.client("TX=10M", "RX=0", "qclose=Y", "sclose=Y")
        self.validate_ext_test_results()


class QUICEchoExtEarlyScloseRxTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Early Sclose Rx Test Case"""

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    @unittest.skip("testcase under development")
    def test_quic_ext_early_sclose_rx(self):
        """QUIC external transfer, early rx stream close"""
        self.server("TX=0", "RX=10M", "qclose=N", "sclose=Y")
        self.client("TX=20M", "RX=0", "qclose=W", "sclose=W",
                    "tx-results-diff")
        self.validate_ext_test_results()


class QUICEchoExtEarlyScloseTxTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Early Sclose Tx Test Case"""

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    @unittest.skip("testcase under development")
    def test_quic_ext_early_sclose_tx(self):
        """QUIC external transfer, early tx stream close"""
        self.server("TX=0", "RX=20M", "qclose=W", "sclose=W",
                    "rx-results-diff")
        self.client("TX=10M", "RX=0", "qclose=Y", "sclose=Y")
        self.validate_ext_test_results()


class QUICEchoExtServerStreamTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Server Stream Test Case"""
    quic_setup = "serverstream"
    timeout = 60

    def test_quic_ext_transfer_server_stream(self):
        """QUIC external server transfer"""
        self.server("TX=10M", "RX=0")
        self.client("TX=0", "RX=10M")
        self.validate_ext_test_results()


class QUICEchoExtServerStreamBigTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Server Stream Big Test Case"""
    quic_setup = "serverstream"
    server_fifo_size = '4M'
    client_fifo_size = '4M'
    test_bytes = ''
    timeout = 60

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    def test_quic_ext_transfer_server_stream_big(self):
        """QUIC external server transfer, big stream"""
        self.server("TX=2G", "RX=0")
        self.client("TX=0", "RX=2G")
        self.validate_ext_test_results()


class QUICEchoExtServerStreamQcloseRxTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Server Stream Qclose Rx Test Case"""
    quic_setup = "serverstream"

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    @unittest.skip("testcase under development")
    def test_quic_ext_server_stream_qclose_rx(self):
        """QUIC external server transfer, rx close"""
        self.server("TX=10M", "RX=0", "qclose=W", "sclose=W")
        self.client("TX=0", "RX=10M", "qclose=Y", "sclose=N")
        self.validate_ext_test_results()


class QUICEchoExtServerStreamQcloseTxTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Server Stream Qclose Tx Test Case"""
    quic_setup = "serverstream"

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    @unittest.skip("testcase under development")
    def test_quic_ext_server_stream_qclose_tx(self):
        """QUIC external server transfer, tx close"""
        self.server("TX=10M", "RX=0", "qclose=Y", "sclose=N")
        self.client("TX=0", "RX=10M", "qclose=W", "sclose=W",
                    "rx-results-diff")
        self.validate_ext_test_results()


class QUICEchoExtServerStreamEarlyQcloseRxTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Server Stream Early Qclose Rx Test Case"""
    quic_setup = "serverstream"

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    @unittest.skip("testcase under development")
    def test_quic_ext_server_stream_early_qclose_rx(self):
        """QUIC external server transfer, early rx close"""
        self.server("TX=20M", "RX=0", "qclose=W", "sclose=W",
                    "tx-results-diff")
        self.client("TX=0", "RX=10M", "qclose=Y", "sclose=N")
        self.validate_ext_test_results()


class QUICEchoExtServerStreamEarlyQcloseTxTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Server Stream Early Qclose Tx Test Case"""
    quic_setup = "serverstream"

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    @unittest.skip("testcase under development")
    def test_quic_ext_server_stream_early_qclose_tx(self):
        """QUIC external server transfer, early tx close"""
        self.server("TX=10M", "RX=0", "qclose=Y", "sclose=N")
        self.client("TX=0", "RX=20M", "qclose=W", "sclose=W",
                    "rx-results-diff")
        self.validate_ext_test_results()


class QUICEchoExtServerStreamScloseRxTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Server Stream Sclose Rx Test Case"""
    quic_setup = "serverstream"

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    @unittest.skip("testcase under development")
    def test_quic_ext_server_stream_sclose_rx(self):
        """QUIC external server transfer, rx stream close"""
        self.server("TX=10M", "RX=0", "qclose=W", "sclose=W")
        self.client("TX=0", "RX=10M", "qclose=N", "sclose=Y")
        self.validate_ext_test_results()


class QUICEchoExtServerStreamScloseTxTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Server Stream Sclose Tx Test Case"""
    quic_setup = "serverstream"

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    @unittest.skip("testcase under development")
    def test_quic_ext_server_stream_sclose_tx(self):
        """QUIC external server transfer, tx stream close"""
        self.server("TX=10M", "RX=0", "qclose=Y", "sclose=Y")
        self.client("TX=0", "RX=10M", "qclose=W", "sclose=W")
        self.validate_ext_test_results()


class QUICEchoExtServerStreamEarlyScloseRxTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Server Stream Early Sclose Rx Test Case"""
    quic_setup = "serverstream"

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    @unittest.skip("testcase under development")
    def test_quic_ext_server_stream_early_sclose_rx(self):
        """QUIC external server transfer, early rx stream close"""
        self.server("TX=20M", "RX=0", "qclose=W", "sclose=W",
                    "tx-results-diff")
        self.client("TX=0", "RX=10M", "qclose=N", "sclose=Y")
        self.validate_ext_test_results()


class QUICEchoExtServerStreamEarlyScloseTxTestCase(QUICEchoExtTestCase):
    """QUIC Echo Ext Transfer Server Stream Early Sclose Tx Test Case"""
    quic_setup = "serverstream"

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    @unittest.skip("testcase under development")
    def test_quic_ext_server_stream_early_sclose_tx(self):
        """QUIC external server transfer, early tx stream close"""
        self.server("TX=10M", "RX=0", "qclose=Y", "sclose=Y")
        self.client("TX=0", "RX=20M", "qclose=W", "sclose=W",
                    "rx-results-diff")
        self.validate_ext_test_results()


class QUICEchoExtServerStreamWorkersTestCase(QUICEchoExtTestCase):
    """QUIC Echo External Transfer Server Stream MultiWorker Test Case"""
    quic_setup = "serverstream"

    @unittest.skipUnless(running_extended_tests, "part of extended tests")
    @unittest.skip("testcase under development")
    def test_quic_ext_transfer_server_stream_multi_workers(self):
        """QUIC external server transfer, multi-worker"""
        self.server("nclients", "4", "quic-streams", "4", "TX=10M", "RX=0")
        self.client("nclients", "4", "quic-streams", "4", "TX=0", "RX=10M")
        self.validate_ext_test_results()


if __name__ == '__main__':
    unittest.main(testRunner=VppTestRunner)