#!/usr/bin/env python3

import unittest
import os
import re
import subprocess

from asfframework import VppAsfTestCase, VppTestRunner
from vpp_ip_route import VppIpTable, VppIpRoute, VppRoutePath


def checkQat():
    r = os.path.exists("/dev/qat_dev_processes")
    if r:
        return True
    else:
        # print("NO QAT! EXIT!")
        return False


def checkOpenSSLVersion():
    ret = False
    r = "OPENSSL_ROOT_DIR" in os.environ
    if r:
        ssl = os.environ["OPENSSL_ROOT_DIR"] + "/bin/openssl version"
        p = subprocess.Popen(
            ssl, stdin=subprocess.PIPE, stdout=subprocess.PIPE, shell=True
        )
        p.wait()
        output = p.stdout.read()
        status = p.returncode

        if status:
            pass
            # print("openssl version error!")
        else:
            ssl_ver_src = re.findall(r"(\d+)\.+\d+.+\d+", output)
            ssl_ver = int(ssl_ver_src[0])
            if ssl_ver < 3:
                ret = False
            else:
                ret = True
    else:
        # print("NO OPENSSL_ROOT_DIR!")
        pass

    return ret


def checkAll():
    ret = checkQat() & checkOpenSSLVersion()
    return ret


class TestTLS(VppAsfTestCase):
    """TLS Qat Test Case."""

    @classmethod
    def setUpClass(cls):
        super(TestTLS, cls).setUpClass()

    @classmethod
    def tearDownClass(cls):
        super(TestTLS, cls).tearDownClass()

    def setUp(self):
        super(TestTLS, self).setUp()

        self.vapi.session_enable_disable(is_enable=1)
        self.create_loopback_interfaces(2)

        table_id = 0

        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_v4(
            namespace_id="0", sw_if_index=self.loop0.sw_if_index
        )
        self.vapi.app_namespace_add_del_v4(
            namespace_id="1", sw_if_index=self.loop1.sw_if_index
        )

    def tearDown(self):
        self.vapi.app_namespace_add_del_v4(
            is_add=0, namespace_id="0", sw_if_index=self.loop0.sw_if_index
        )
        self.vapi.app_namespace_add_del_v4(
            is_add=0, namespace_id="1", sw_if_index=self.loop1.sw_if_index
        )
        for i in self.lo_interfaces:
            i.unconfig_ip4()
            i.set_table_ip4(0)
            i.admin_down()
        self.vapi.session_enable_disable(is_enable=0)
        super(TestTLS, self).tearDown()

    @unittest.skipUnless(checkAll(), "QAT or OpenSSL not satisfied,skip.")
    def test_tls_transfer(self):
        """TLS qat echo client/server transfer"""

        # Add inter-table routes
        ip_t01 = VppIpRoute(
            self,
            self.loop1.local_ip4,
            32,
            [VppRoutePath("0.0.0.0", 0xFFFFFFFF, nh_table_id=1)],
        )

        ip_t10 = VppIpRoute(
            self,
            self.loop0.local_ip4,
            32,
            [VppRoutePath("0.0.0.0", 0xFFFFFFFF, nh_table_id=0)],
            table_id=1,
        )
        ip_t01.add_vpp_config()
        ip_t10.add_vpp_config()

        # Enable QAT engine and TLS async
        r = self.vapi.tls_openssl_set_engine(
            async_enable=1, engine="qat", algorithm="RSA,PKEY_CRYPTO", ciphers="RSA"
        )
        self.assertIsNotNone(r, "No response msg ")

        # Start builtin server and client
        uri = "tls://" + self.loop0.local_ip4 + "/1234"
        error = self.vapi.cli(
            "test echo server appns 0 fifo-size 4k tls-engine 1 uri " + uri
        )
        if error:
            self.logger.critical(error)
            self.assertNotIn("failed", error)

        error = self.vapi.cli(
            "test echo client mbytes 10 appns 1 "
            "fifo-size 4k test-bytes "
            "tls-engine 1 "
            "syn-timeout 2 uri " + uri
        )
        if error:
            self.logger.critical(error)
            self.assertNotIn("failed", error)

        # Delete inter-table routes
        ip_t01.remove_vpp_config()
        ip_t10.remove_vpp_config()


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