/*
 * Copyright (C) 2017-2019 Intel Corporation
 *
 * SPDX-License-Identifier: MIT
 *
 */

#include "runtime/event/async_events_handler.h"
#include "runtime/event/user_event.h"
#include "runtime/helpers/options.h"
#include "runtime/platform/platform.h"
#include "test.h"
#include "unit_tests/fixtures/scenario_test_fixture.h"
#include "unit_tests/mocks/mock_command_queue.h"
#include "unit_tests/mocks/mock_kernel.h"

#include "gtest/gtest.h"

using namespace NEO;

struct CallbackData {
    cl_kernel kernel;
    cl_command_queue queue;
    bool callbackCalled = false;
    UserEvent *signalCallbackDoneEvent = nullptr;
};

void CL_CALLBACK callback(cl_event event, cl_int status, void *data) {
    CallbackData *callbackData = (CallbackData *)data;
    size_t offset[] = {0, 0, 0};
    size_t gws[] = {1, 1, 1};

    clEnqueueNDRangeKernel(callbackData->queue, callbackData->kernel, 1, offset, gws, nullptr, 0, nullptr, nullptr);
    clFinish(callbackData->queue);

    callbackData->callbackCalled = true;

    if (callbackData->signalCallbackDoneEvent) {
        cl_event callbackEvent = callbackData->signalCallbackDoneEvent;
        clSetUserEventStatus(callbackEvent, CL_COMPLETE);
        // No need to reatin and release this synchronization event
        //clReleaseEvent(callbackEvent);
    }
}

TEST_F(ScenarioTest, givenAsyncHandlerDisabledAndUserEventBlockingEnqueueAndOutputEventWithCallbackWhenUserEventIsSetCompleteThanCallbackIsExecuted) {
    DebugManager.flags.EnableAsyncEventsHandler.set(false);

    cl_command_queue clCommandQ = nullptr;
    cl_queue_properties properties = 0;
    cl_kernel clKernel = kernel;
    size_t offset[] = {0, 0, 0};
    size_t gws[] = {1, 1, 1};

    cl_int retVal = CL_SUCCESS;
    cl_int success = CL_SUCCESS;

    UserEvent *userEvent = new UserEvent(context);
    cl_event eventBlocking = userEvent;
    cl_event eventOut = nullptr;

    clCommandQ = clCreateCommandQueue(context, devices[0], properties, &retVal);

    retVal = clEnqueueNDRangeKernel(clCommandQ, clKernel, 1, offset, gws, nullptr, 1, &eventBlocking, &eventOut);
    EXPECT_EQ(success, retVal);
    ASSERT_NE(nullptr, eventOut);

    CallbackData data;
    data.kernel = clKernel;
    data.queue = clCommandQ;
    data.callbackCalled = false;

    clSetEventCallback(eventOut, CL_COMPLETE, callback, &data);
    EXPECT_FALSE(data.callbackCalled);

    clSetUserEventStatus(eventBlocking, CL_COMPLETE);
    userEvent->release();

    clWaitForEvents(1, &eventOut);
    EXPECT_TRUE(data.callbackCalled);

    clReleaseEvent(eventOut);
    clReleaseCommandQueue(clCommandQ);
}

TEST_F(ScenarioTest, givenAsyncHandlerEnabledAndUserEventBlockingEnqueueAndOutputEventWithCallbackWhenUserEventIsSetCompleteThanCallbackIsExecuted) {
    DebugManager.flags.EnableAsyncEventsHandler.set(true);

    cl_command_queue clCommandQ = nullptr;
    cl_queue_properties properties = 0;
    cl_kernel clKernel = kernel;
    size_t offset[] = {0, 0, 0};
    size_t gws[] = {1, 1, 1};
    cl_int retVal = CL_SUCCESS;
    cl_int success = CL_SUCCESS;
    UserEvent *userEvent = new UserEvent(context);
    cl_event eventBlocking = userEvent;
    cl_event eventOut = nullptr;

    clCommandQ = clCreateCommandQueue(context, devices[0], properties, &retVal);
    retVal = clEnqueueNDRangeKernel(clCommandQ, clKernel, 1, offset, gws, nullptr, 1, &eventBlocking, &eventOut);

    EXPECT_EQ(success, retVal);
    ASSERT_NE(nullptr, eventOut);

    CallbackData data;
    data.kernel = clKernel;
    data.queue = clCommandQ;
    data.callbackCalled = false;
    data.signalCallbackDoneEvent = new UserEvent(context);
    cl_event callbackEvent = data.signalCallbackDoneEvent;

    clSetEventCallback(eventOut, CL_COMPLETE, callback, &data);
    EXPECT_FALSE(data.callbackCalled);

    clSetUserEventStatus(eventBlocking, CL_COMPLETE);
    userEvent->release();

    clWaitForEvents(1, &eventOut);
    clWaitForEvents(1, &callbackEvent);

    EXPECT_TRUE(data.callbackCalled);

    data.signalCallbackDoneEvent->release();

    clReleaseEvent(eventOut);
    clReleaseCommandQueue(clCommandQ);

    platform()->getAsyncEventsHandler()->closeThread();
}