/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "transport.h"

#include <gtest/gtest.h>

#include "adb.h"

class TestTransport : public atransport {
public:
    bool operator==(const atransport& rhs) const {
        EXPECT_EQ(read_from_remote, rhs.read_from_remote);
        EXPECT_EQ(write_to_remote, rhs.write_to_remote);
        EXPECT_EQ(close, rhs.close);
        EXPECT_EQ(kick, rhs.kick);

        EXPECT_EQ(fd, rhs.fd);
        EXPECT_EQ(transport_socket, rhs.transport_socket);

        EXPECT_EQ(
            0, memcmp(&transport_fde, &rhs.transport_fde, sizeof(fdevent)));

        EXPECT_EQ(ref_count, rhs.ref_count);
        EXPECT_EQ(sync_token, rhs.sync_token);
        EXPECT_EQ(connection_state, rhs.connection_state);
        EXPECT_EQ(online, rhs.online);
        EXPECT_EQ(type, rhs.type);

        EXPECT_EQ(usb, rhs.usb);
        EXPECT_EQ(sfd, rhs.sfd);

        EXPECT_EQ(serial, rhs.serial);
        EXPECT_EQ(product, rhs.product);
        EXPECT_EQ(model, rhs.model);
        EXPECT_EQ(device, rhs.device);
        EXPECT_EQ(devpath, rhs.devpath);
        EXPECT_EQ(adb_port, rhs.adb_port);
        EXPECT_EQ(kicked, rhs.kicked);

        EXPECT_EQ(key, rhs.key);
        EXPECT_EQ(0, memcmp(token, rhs.token, TOKEN_SIZE));
        EXPECT_EQ(0, memcmp(&auth_fde, &rhs.auth_fde, sizeof(fdevent)));
        EXPECT_EQ(failed_auth_attempts, rhs.failed_auth_attempts);

        EXPECT_EQ(features(), rhs.features());

        return true;
    }
};

class TransportSetup {
public:
  TransportSetup() {
#ifdef _WIN32
    // Use extern instead of including sysdeps.h which brings in various macros
    // that conflict with APIs used in this file.
    extern void adb_sysdeps_init(void);
    adb_sysdeps_init();
#else
    // adb_sysdeps_init() is an inline function that we cannot link against.
#endif
  }
};

// Static initializer will call adb_sysdeps_init() before main() to initialize
// the transport mutex before it is used in the tests. Alternatives would be to
// use __attribute__((constructor)) here or to use that or a static initializer
// for adb_sysdeps_init() itself in sysdeps_win32.cpp (caveats of unclear
// init order), or to use a test fixture whose SetUp() could do the init once.
static TransportSetup g_TransportSetup;

TEST(transport, kick_transport) {
  TestTransport t;

  // Mutate some member so we can test that the function is run.
  t.kick = [](atransport* trans) { trans->fd = 42; };

  TestTransport expected;
  expected.kick = t.kick;
  expected.fd = 42;
  expected.kicked = 1;

  kick_transport(&t);
  ASSERT_EQ(42, t.fd);
  ASSERT_EQ(1, t.kicked);
  ASSERT_EQ(expected, t);
}

TEST(transport, kick_transport_already_kicked) {
  // Ensure that the transport is not modified if the transport has already been
  // kicked.
  TestTransport t;
  t.kicked = 1;
  t.kick = [](atransport*) { FAIL() << "Kick should not have been called"; };

  TestTransport expected;
  expected.kicked = 1;
  expected.kick = t.kick;

  kick_transport(&t);
  ASSERT_EQ(expected, t);
}

static void DisconnectFunc(void* arg, atransport*) {
    int* count = reinterpret_cast<int*>(arg);
    ++*count;
}

TEST(transport, RunDisconnects) {
    atransport t;
    // RunDisconnects() can be called with an empty atransport.
    t.RunDisconnects();

    int count = 0;
    adisconnect disconnect;
    disconnect.func = DisconnectFunc;
    disconnect.opaque = &count;
    t.AddDisconnect(&disconnect);
    t.RunDisconnects();
    ASSERT_EQ(1, count);

    // disconnect should have been removed automatically.
    t.RunDisconnects();
    ASSERT_EQ(1, count);

    count = 0;
    t.AddDisconnect(&disconnect);
    t.RemoveDisconnect(&disconnect);
    t.RunDisconnects();
    ASSERT_EQ(0, count);
}

TEST(transport, SetFeatures) {
    atransport t;
    ASSERT_EQ(0U, t.features().size());

    t.SetFeatures(FeatureSetToString(FeatureSet{"foo"}));
    ASSERT_EQ(1U, t.features().size());
    ASSERT_TRUE(t.has_feature("foo"));

    t.SetFeatures(FeatureSetToString(FeatureSet{"foo", "bar"}));
    ASSERT_EQ(2U, t.features().size());
    ASSERT_TRUE(t.has_feature("foo"));
    ASSERT_TRUE(t.has_feature("bar"));

    t.SetFeatures(FeatureSetToString(FeatureSet{"foo", "bar", "foo"}));
    ASSERT_EQ(2U, t.features().size());
    ASSERT_TRUE(t.has_feature("foo"));
    ASSERT_TRUE(t.has_feature("bar"));

    t.SetFeatures(FeatureSetToString(FeatureSet{"bar", "baz"}));
    ASSERT_EQ(2U, t.features().size());
    ASSERT_FALSE(t.has_feature("foo"));
    ASSERT_TRUE(t.has_feature("bar"));
    ASSERT_TRUE(t.has_feature("baz"));

    t.SetFeatures("");
    ASSERT_EQ(0U, t.features().size());
}

TEST(transport, parse_banner_no_features) {
    atransport t;

    parse_banner("host::", &t);

    ASSERT_EQ(0U, t.features().size());
    ASSERT_EQ(kCsHost, t.connection_state);

    ASSERT_EQ(nullptr, t.product);
    ASSERT_EQ(nullptr, t.model);
    ASSERT_EQ(nullptr, t.device);
}

TEST(transport, parse_banner_product_features) {
    atransport t;

    const char banner[] =
        "host::ro.product.name=foo;ro.product.model=bar;ro.product.device=baz;";
    parse_banner(banner, &t);

    ASSERT_EQ(kCsHost, t.connection_state);

    ASSERT_EQ(0U, t.features().size());

    ASSERT_EQ(std::string("foo"), t.product);
    ASSERT_EQ(std::string("bar"), t.model);
    ASSERT_EQ(std::string("baz"), t.device);
}

TEST(transport, parse_banner_features) {
    atransport t;

    const char banner[] =
        "host::ro.product.name=foo;ro.product.model=bar;ro.product.device=baz;"
        "features=woodly,doodly";
    parse_banner(banner, &t);

    ASSERT_EQ(kCsHost, t.connection_state);

    ASSERT_EQ(2U, t.features().size());
    ASSERT_TRUE(t.has_feature("woodly"));
    ASSERT_TRUE(t.has_feature("doodly"));

    ASSERT_EQ(std::string("foo"), t.product);
    ASSERT_EQ(std::string("bar"), t.model);
    ASSERT_EQ(std::string("baz"), t.device);
}