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//
// Copyright (c) 2017 The Khronos Group Inc.
// 
// 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 "testBase.h"
#include "action_classes.h"
#include "harness/conversions.h"
#include "harness/ThreadPool.h"

#if !defined (_MSC_VER)
#include <unistd.h>
#endif // !_MSC_VER

extern const char *IGetStatusString( cl_int status );

#define PRINT_OPS 0

// Yes, this is somewhat nasty, in that we're relying on the CPU (the real CPU, not the OpenCL device)
// to be atomic w.r.t. boolean values. Although if it isn't, we'll just miss the check on this bool
// until the next time around, so it's not that big of a deal. Ideally, we'd be using a semaphore with
// a trywait on it, but then that introduces the fun issue of what to do on Win32, etc. This way is
// far more portable, and worst case of failure is a slightly longer test run.
static bool sCallbackTriggered = false;


#define EVENT_CALLBACK_TYPE_TOTAL 3
static bool sCallbackTriggered_flag[ EVENT_CALLBACK_TYPE_TOTAL ] ={ false,false, false };
cl_int event_callback_types[EVENT_CALLBACK_TYPE_TOTAL] ={ CL_SUBMITTED, CL_RUNNING, CL_COMPLETE};

// Our callback function
/*void CL_CALLBACK single_event_callback_function( cl_event event, cl_int commandStatus, void * userData )
{
     int i=*static_cast<int *>(userData);
    log_info( "\tEvent callback  %d   triggered\n",  i);
    sCallbackTriggered_flag [ i ] = true;
}*/

/*   use struct as call back para */
typedef struct { cl_int enevt_type; int index; } CALL_BACK_USER_DATA;

void CL_CALLBACK single_event_callback_function_flags( cl_event event, cl_int commandStatus, void * userData )
{
   // int i=*static_cast<int *>(userData);
    CALL_BACK_USER_DATA *pdata= static_cast<CALL_BACK_USER_DATA *>(userData);

    log_info( "\tEvent callback  %d  of type %d triggered\n",  pdata->index, pdata->enevt_type);
    sCallbackTriggered_flag [pdata->index ] = true;
}

int test_callback_event_single( cl_device_id device, cl_context context, cl_command_queue queue, Action *actionToTest )
{
    // Note: we don't use the waiting feature here. We just want to verify that we get a callback called
    // when the given event finishes

    cl_int error = actionToTest->Setup( device, context, queue );
    test_error( error, "Unable to set up test action" );

    // Set up a user event, which we use as a gate for the second event
    clEventWrapper gateEvent = clCreateUserEvent( context, &error );
    test_error( error, "Unable to set up user gate event" );

    // Set up the execution of the action with its actual event
    clEventWrapper actualEvent;
    error = actionToTest->Execute( queue, 1, &gateEvent, &actualEvent );
    test_error( error, "Unable to set up action execution" );

    // Set up the callback on the actual event

  /*  use struct as call back para */
  CALL_BACK_USER_DATA user_data[EVENT_CALLBACK_TYPE_TOTAL];
  int index [EVENT_CALLBACK_TYPE_TOTAL]={ 0,1,2};
  for( int i=0;i< EVENT_CALLBACK_TYPE_TOTAL; i++)
  {
       user_data[i].enevt_type=event_callback_types[i];
       user_data[i].index =i;
       error = clSetEventCallback( actualEvent, event_callback_types[i], single_event_callback_function_flags, user_data+i );

  }

    // Now release the user event, which will allow our actual action to run
    error = clSetUserEventStatus( gateEvent, CL_COMPLETE );
    test_error( error, "Unable to trigger gate event" );

    // Now we wait for completion. Note that we can actually wait on the event itself, at least at first
    error = clWaitForEvents( 1, &actualEvent );
    test_error( error, "Unable to wait for actual test event" );

    // Note: we can check our callback now, and it MIGHT have been triggered, but that's not guaranteed
    if( sCallbackTriggered )
    {
        // We're all good, so return success
        return 0;
    }

    // The callback has not yet been called, but that doesn't mean it won't be. So wait for it
    log_info( "\tWaiting for callback..." );
    fflush( stdout );
    for( int i = 0; i < 10 * 10; i++ )
    {
        usleep( 100000 );    // 1/10th second

    int cc=0;
    for( int k=0;k< EVENT_CALLBACK_TYPE_TOTAL;k++)
        if (sCallbackTriggered_flag[k]) {
            cc++;
        }

        if  (cc== EVENT_CALLBACK_TYPE_TOTAL  )
        {
            log_info( "\n" );
            return 0;
        }
        log_info( "." );
        fflush( stdout );
    }

    // If we got here, we never got the callback
    log_error( "\nCallback not called within 10 seconds! (assuming failure)\n" );
    return -1;
}

#define TEST_ACTION( name ) \
{    \
    name##Action action;    \
    log_info( "-- Testing " #name "...\n" );    \
    if( ( error = test_callback_event_single( deviceID, context, queue, &action ) ) != CL_SUCCESS )    \
        retVal++;            \
    clFinish( queue ); \
}

int test_callbacks( cl_device_id deviceID, cl_context context, cl_command_queue queue, int num_elements )
{
    cl_int error;
    int retVal = 0;

    log_info( "\n" );

    TEST_ACTION( NDRangeKernel )

    TEST_ACTION( ReadBuffer )
    TEST_ACTION( WriteBuffer )
    TEST_ACTION( MapBuffer )
    TEST_ACTION( UnmapBuffer )

    if( checkForImageSupport( deviceID ) == CL_IMAGE_FORMAT_NOT_SUPPORTED )
    {
        log_info( "\nNote: device does not support images. Skipping remainder of callback tests...\n" );
    }
    else
    {
        TEST_ACTION( ReadImage2D )
        TEST_ACTION( WriteImage2D )
        TEST_ACTION( CopyImage2Dto2D )
        TEST_ACTION( Copy2DImageToBuffer )
        TEST_ACTION( CopyBufferTo2DImage )
        TEST_ACTION( MapImage )

        if( checkFor3DImageSupport( deviceID ) == CL_IMAGE_FORMAT_NOT_SUPPORTED )
            log_info( "\nNote: device does not support 3D images. Skipping remainder of waitlist tests...\n" );
        else
        {
            TEST_ACTION( ReadImage3D )
            TEST_ACTION( WriteImage3D )
            TEST_ACTION( CopyImage2Dto3D )
            TEST_ACTION( CopyImage3Dto2D )
            TEST_ACTION( CopyImage3Dto3D )
            TEST_ACTION( Copy3DImageToBuffer )
            TEST_ACTION( CopyBufferTo3DImage )
        }
    }

    return retVal;
}

#define  SIMUTANEOUS_ACTION_TOTAL  18
static bool sSimultaneousFlags[ 54 ];// for 18 actions with 3 callback status
static volatile int sSimultaneousCount;

Action * actions[ 19 ] = { 0 };

// Callback for the simultaneous tests
void CL_CALLBACK simultaneous_event_callback_function( cl_event event, cl_int commandStatus, void * userData )
{
    int eventIndex = (int)(size_t)userData;
  int actionIndex = eventIndex/EVENT_CALLBACK_TYPE_TOTAL;
  int statusIndex = eventIndex%EVENT_CALLBACK_TYPE_TOTAL;
    log_info( "\tEvent callback triggered for action %s callback type %s \n", actions[actionIndex]->GetName(), IGetStatusString(statusIndex) );
    sSimultaneousFlags[ actionIndex ] = true;
    ThreadPool_AtomicAdd(&sSimultaneousCount,1);
}

int test_callbacks_simultaneous( cl_device_id deviceID, cl_context context, cl_command_queue queue, int num_elements )
{
    cl_int error;

    // Unlike the singles test, in this one, we run a bunch of events all at once, to verify that
    // the callbacks do get called once-and-only-once for each event, even if the run out of order or
    // are dependent on each other

    // First, the list of actions to run
    int actionCount = 0, index = 0;

    actions[ index++ ] = new NDRangeKernelAction();
    actions[ index++ ] = new ReadBufferAction();
    actions[ index++ ] = new WriteBufferAction();
    actions[ index++ ] = new MapBufferAction();
    actions[ index++ ] = new UnmapBufferAction();

    if( checkForImageSupport( deviceID ) != CL_IMAGE_FORMAT_NOT_SUPPORTED )
    {
        actions[ index++ ] = new ReadImage2DAction();
        actions[ index++ ] = new WriteImage2DAction();
        actions[ index++ ] = new CopyImage2Dto2DAction();
        actions[ index++ ] = new Copy2DImageToBufferAction();
        actions[ index++ ] = new CopyBufferTo2DImageAction();
        actions[ index++ ] = new MapImageAction();

        if( checkFor3DImageSupport( deviceID ) != CL_IMAGE_FORMAT_NOT_SUPPORTED )
        {
            actions[ index++ ] = new ReadImage3DAction();
            actions[ index++ ] = new WriteImage3DAction();
            actions[ index++ ] = new CopyImage2Dto3DAction();
            actions[ index++ ] = new CopyImage3Dto2DAction();
            actions[ index++ ] = new CopyImage3Dto3DAction();
            actions[ index++ ] = new Copy3DImageToBufferAction();
            actions[ index++ ] = new CopyBufferTo3DImageAction();
        }
    }
    actionCount = index;
    actions[ index++ ] = NULL;

    // Now set them all up
    log_info( "\tSetting up test events...\n" );
    for( index = 0; actions[ index ] != NULL; index++ )
    {
        error = actions[ index ]->Setup( deviceID, context, queue );
        test_error( error, "Unable to set up test action" );
        sSimultaneousFlags[ index ] = false;
    }
    sSimultaneousCount = 0;

    // Set up the user event to start them all
    clEventWrapper gateEvent = clCreateUserEvent( context, &error );
    test_error( error, "Unable to set up user gate event" );

    // Start executing, all tied to the gate event
    //clEventWrapper actionEvents[ 18 ];// current actionCount is 18
    clEventWrapper *actionEvents= new clEventWrapper[actionCount];
    if (actionEvents == NULL)
    {
        log_error(" memory error in test_callbacks_simultaneous  \n");
      for (size_t i=0;i<(sizeof(actions)/sizeof(actions[0]));++i)
        if (actions[i]) delete actions[i];
        return  -1;
    }

    RandomSeed seed( gRandomSeed );
    for( index = 0; actions[ index ] != NULL; index++ )
    {
        // Randomly choose to wait on the gate, or wait on the previous event
        cl_event * eventPtr = &gateEvent;
        if( ( index > 0 ) && ( random_in_range( 0, 255, seed ) & 1 ) )
            eventPtr = &actionEvents[ index - 1 ];

        error = actions[ index ]->Execute( queue, 1, eventPtr, &actionEvents[ index ] );
        test_error( error, "Unable to execute test action" );


    for( int k=0; k< EVENT_CALLBACK_TYPE_TOTAL; k++)
    {
       error = clSetEventCallback( actionEvents[index], event_callback_types[k], simultaneous_event_callback_function, (void *)(size_t)(index*EVENT_CALLBACK_TYPE_TOTAL+k ) );
       test_error( error, "Unable to set event callback function" );

    }
    }

  int total_callbacks= actionCount * EVENT_CALLBACK_TYPE_TOTAL;

    // Now release the user event, which will allow our actual action to run
    error = clSetUserEventStatus( gateEvent, CL_COMPLETE );
    test_error( error, "Unable to trigger gate event" );

    // Wait on the actual action events now
    log_info( "\tWaiting for test completions...\n" );
    error = clWaitForEvents( actionCount, &actionEvents[ 0 ] );
    test_error( error, "Unable to wait for actual test events" );

    // Note: we can check our callback now, and it MIGHT have been triggered, but that's not guaranteed
  int last_count = 0;
    if( ((last_count = sSimultaneousCount)) == total_callbacks)
    {
        // We're all good, so return success
        log_info( "\t%d of %d callbacks received\n", sSimultaneousCount, total_callbacks );

        if (actionEvents) delete [] actionEvents;
    for (size_t i=0;i<(sizeof(actions)/sizeof(actions[0]));++i)
      if (actions[i]) delete actions[i];
        return 0;
    }

    // We haven't gotten (all) of the callbacks, so wait for them
    log_info( "\tWe've only received %d of the %d callbacks we expected; waiting for more...\n", last_count, total_callbacks );

    for( int i = 0; i < 10 * 10; i++ )
    {
        usleep( 100000 );    // 1/10th second
        if( ((last_count = sSimultaneousCount)) == total_callbacks )
        {
      // All of the callbacks were executed
      if (actionEvents) delete [] actionEvents;
      for (size_t i=0;i<(sizeof(actions)/sizeof(actions[0]));++i)
        if (actions[i]) delete actions[i];
        return 0;
        }
    }

    // If we got here, some of the callbacks did not occur in time
    log_error( "\nError: We only ever received %d of our %d callbacks!\n", last_count, total_callbacks );
    log_error( "Events that did not receive callbacks:\n" );
    for( index = 0; actions[ index ] != NULL; index++ )
    {
        if( !sSimultaneousFlags[ index ] )
            log_error( "\t%s\n", actions[ index ]->GetName() );
    }

  if (actionEvents) delete [] actionEvents;
    return -1;

}