/*
 * barrier -- mouse and keyboard sharing utility
 * Copyright (C) 2015-2016 Symless Ltd.
 * 
 * This package is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * found in the file LICENSE that should have accompanied this file.
 * 
 * This package is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#define TEST_ENV

#include "test/mock/ipc/MockIpcServer.h"

#include "mt/Thread.h"
#include "ipc/IpcLogOutputter.h"
#include "base/String.h"
#include "common/common.h"

#include "test/global/gmock.h"
#include "test/global/gtest.h"

// HACK: ipc logging only used on windows anyway
#if WINAPI_MSWINDOWS

using ::testing::_;
using ::testing::Return;
using ::testing::Matcher;
using ::testing::MatcherCast;
using ::testing::Property;
using ::testing::StrEq;
using ::testing::AtLeast;

using namespace barrier;

inline const Matcher<const IpcMessage&> IpcLogLineMessageEq(const String& s) {
    const Matcher<const IpcLogLineMessage&> m(
        Property(&IpcLogLineMessage::logLine, StrEq(s)));
    return MatcherCast<const IpcMessage&>(m);
}

TEST(IpcLogOutputterTests, write_threadingEnabled_bufferIsSent)
{
    MockIpcServer mockServer;
    mockServer.delegateToFake();
    
    ON_CALL(mockServer, hasClients(_)).WillByDefault(Return(true));

    EXPECT_CALL(mockServer, hasClients(_)).Times(AtLeast(3));
    EXPECT_CALL(mockServer, send(IpcLogLineMessageEq("mock 1\n"), _)).Times(1);
    EXPECT_CALL(mockServer, send(IpcLogLineMessageEq("mock 2\n"), _)).Times(1);

    IpcLogOutputter outputter(mockServer, kIpcClientUnknown, true);
    outputter.write(kNOTE, "mock 1");
    mockServer.waitForSend();
    outputter.write(kNOTE, "mock 2");
    mockServer.waitForSend();
}

TEST(IpcLogOutputterTests, write_overBufferMaxSize_firstLineTruncated)
{
    MockIpcServer mockServer;
    
    ON_CALL(mockServer, hasClients(_)).WillByDefault(Return(true));
    EXPECT_CALL(mockServer, hasClients(_)).Times(1);
    EXPECT_CALL(mockServer, send(IpcLogLineMessageEq("mock 2\nmock 3\n"), _)).Times(1);

    IpcLogOutputter outputter(mockServer, kIpcClientUnknown, false);
    outputter.bufferMaxSize(2);

    // log more lines than the buffer can contain
    outputter.write(kNOTE, "mock 1");
    outputter.write(kNOTE, "mock 2");
    outputter.write(kNOTE, "mock 3");
    outputter.sendBuffer();
}

TEST(IpcLogOutputterTests, write_underBufferMaxSize_allLinesAreSent)
{
    MockIpcServer mockServer;
    
    ON_CALL(mockServer, hasClients(_)).WillByDefault(Return(true));

    EXPECT_CALL(mockServer, hasClients(_)).Times(1);
    EXPECT_CALL(mockServer, send(IpcLogLineMessageEq("mock 1\nmock 2\n"), _)).Times(1);

    IpcLogOutputter outputter(mockServer, kIpcClientUnknown, false);
    outputter.bufferMaxSize(2);

    // log more lines than the buffer can contain
    outputter.write(kNOTE, "mock 1");
    outputter.write(kNOTE, "mock 2");
    outputter.sendBuffer();
}

// HACK: temporarily disable this intermittently failing unit test.
// when the build machine is under heavy load, a race condition
// usually happens.
#if 0
TEST(IpcLogOutputterTests, write_overBufferRateLimit_lastLineTruncated)
{
    MockIpcServer mockServer;
    
    ON_CALL(mockServer, hasClients(_)).WillByDefault(Return(true));

    EXPECT_CALL(mockServer, hasClients(_)).Times(2);
    EXPECT_CALL(mockServer, send(IpcLogLineMessageEq("mock 1\nmock 2\n"), _)).Times(1);
    EXPECT_CALL(mockServer, send(IpcLogLineMessageEq("mock 4\nmock 5\n"), _)).Times(1);

    IpcLogOutputter outputter(mockServer, false);
    outputter.bufferRateLimit(2, 1); // 1s

    // log 1 more line than the buffer can accept in time limit.
    outputter.write(kNOTE, "mock 1");
    outputter.write(kNOTE, "mock 2");
    outputter.write(kNOTE, "mock 3");

    outputter.sendBuffer();
    
    // after waiting the time limit send another to make sure
    // we can log after the time limit passes.
    // HACK: sleep causes the unit test to fail intermittently,
    // so lets try 100ms (there must be a better way to solve this)
    ARCH->sleep(2); // 2s
    outputter.write(kNOTE, "mock 4");
    outputter.write(kNOTE, "mock 5");
    outputter.write(kNOTE, "mock 6");

    outputter.sendBuffer();
}
#endif

TEST(IpcLogOutputterTests, write_underBufferRateLimit_allLinesAreSent)
{
    MockIpcServer mockServer;
    
    ON_CALL(mockServer, hasClients(_)).WillByDefault(Return(true));

    EXPECT_CALL(mockServer, hasClients(_)).Times(2);
    EXPECT_CALL(mockServer, send(IpcLogLineMessageEq("mock 1\nmock 2\n"), _)).Times(1);
    EXPECT_CALL(mockServer, send(IpcLogLineMessageEq("mock 3\nmock 4\n"), _)).Times(1);

    IpcLogOutputter outputter(mockServer, kIpcClientUnknown, false);
    outputter.bufferRateLimit(4, 1); // 1s (should be plenty of time)

    // log 1 more line than the buffer can accept in time limit.
    outputter.write(kNOTE, "mock 1");
    outputter.write(kNOTE, "mock 2");
    outputter.sendBuffer();
    
    // after waiting the time limit send another to make sure
    // we can log after the time limit passes.
    outputter.write(kNOTE, "mock 3");
    outputter.write(kNOTE, "mock 4");
    outputter.sendBuffer();
}

#endif // WINAPI_MSWINDOWS