/*
 * Copyright (c) 2014-2016, Siemens AG. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdlib.h>

#include <embb_mtapi_test_config.h>
#include <embb_mtapi_test_task.h>

#include <embb/base/c/memory_allocation.h>
#include <embb/base/c/internal/unused.h>

#define JOB_TEST_TASK 42
#define JOB_TEST_MULTIINSTANCE_TASK 43
#define JOB_TEST_DETACHED_TASK 44
#define TASK_TEST_ID 23

static void testTaskAction(
  const void* args,
  mtapi_size_t /*arg_size*/,
  void* /*result_buffer*/,
  mtapi_size_t /*result_buffer_size*/,
  const void* /*node_local_data*/,
  mtapi_size_t /*node_local_data_size*/,
  mtapi_task_context_t* task_context) {
  int ii;
  mtapi_status_t status;
  mtapi_uint_t core_num = mtapi_context_corenum_get(task_context, &status);
  MTAPI_CHECK_STATUS(status);
  srand(core_num);
  for (ii = 1000; ii < rand()%1000000; ii ++) {
  }
  embb_mtapi_log_info("testTaskAction %d called from worker %d...\n",
    *reinterpret_cast<const int*>(args), core_num);
  EMBB_UNUSED(args);
}

static void testDetachedTaskAction(
  const void* /*args*/,
  mtapi_size_t /*arg_size*/,
  void* /*result_buffer*/,
  mtapi_size_t /*result_buffer_size*/,
  const void* /*node_local_data*/,
  mtapi_size_t /*node_local_data_size*/,
  mtapi_task_context_t* /*task_context*/) {
}

void testMultiInstanceTaskAction(
  const void* args,
  mtapi_size_t arg_size,
  void* result_buffer,
  mtapi_size_t result_buffer_size,
  const void* node_local_data,
  mtapi_size_t node_local_data_size,
  mtapi_task_context_t* task_context) {
  EMBB_UNUSED(args);
  EMBB_UNUSED(arg_size);

  EMBB_UNUSED(node_local_data);
  EMBB_UNUSED(node_local_data_size);

  mtapi_status_t status;
  mtapi_uint_t this_instance, num_instances;
  mtapi_uint_t* result;
  num_instances = mtapi_context_numinst_get(task_context, &status);
  this_instance = mtapi_context_instnum_get(task_context, &status);

  /* check result buffer size... */
  if (result_buffer_size == sizeof(int) * num_instances) {
    /* ... and cast the result buffer */
    result = reinterpret_cast<mtapi_uint_t*>(result_buffer);
  } else {
    mtapi_context_status_set(task_context, MTAPI_ERR_RESULT_SIZE, &status);
    MTAPI_CHECK_STATUS(status);
    return;
  }

  /* dummy for calculating result */
  result[this_instance] = this_instance;
}


static void testDoSomethingElse() {
}

TaskTest::TaskTest() {
  CreateUnit("mtapi task test").Add(&TaskTest::TestBasic, this);
}

void TaskTest::TrySimple() {
  mtapi_status_t status;
  mtapi_affinity_t affinity;
  mtapi_action_hndl_t action;
  mtapi_action_attributes_t action_attr;
  mtapi_job_hndl_t job;
  mtapi_uint_t ii;
  static const mtapi_uint_t kTaskCount = 100u;
  mtapi_task_hndl_t task[kTaskCount];

  status = MTAPI_ERR_UNKNOWN;
  mtapi_affinity_init(&affinity, MTAPI_TRUE, &status);
  MTAPI_CHECK_STATUS(status);

  status = MTAPI_ERR_UNKNOWN;
  mtapi_actionattr_init(&action_attr, &status);
  MTAPI_CHECK_STATUS(status);

  status = MTAPI_ERR_UNKNOWN;
  mtapi_actionattr_set(
    &action_attr,
    MTAPI_ACTION_AFFINITY,
    &affinity,
    MTAPI_ACTION_AFFINITY_SIZE,
    &status);
  MTAPI_CHECK_STATUS(status);

  status = MTAPI_ERR_UNKNOWN;
  action = mtapi_action_create(
    JOB_TEST_TASK,
    testTaskAction,
    MTAPI_NULL,
    0,
    &action_attr,
    &status);
  MTAPI_CHECK_STATUS(status);

  status = MTAPI_ERR_UNKNOWN;
  job = mtapi_job_get(JOB_TEST_TASK, THIS_DOMAIN_ID, &status);
  MTAPI_CHECK_STATUS(status);

  for (ii = 0; ii < kTaskCount; ii++) {
    status = MTAPI_ERR_UNKNOWN;
    mtapi_uint_t arg = ii;
    task[ii] = mtapi_task_start(
      TASK_TEST_ID,
      job,
      reinterpret_cast<const void*>(&arg),
      0,
      MTAPI_NULL,
      0,
      MTAPI_DEFAULT_TASK_ATTRIBUTES,
      MTAPI_GROUP_NONE,
      &status);
    MTAPI_CHECK_STATUS(status);
  }

  testDoSomethingElse();

  for (ii = 0; ii < kTaskCount; ii++) {
    status = MTAPI_ERR_UNKNOWN;
    mtapi_task_wait(task[ii], 100000, &status);
    MTAPI_CHECK_STATUS(status);
  }

  status = MTAPI_ERR_UNKNOWN;
  mtapi_action_delete(action, 10, &status);
  MTAPI_CHECK_STATUS(status);
}

void TaskTest::TryDetached() {
  mtapi_status_t status;
  mtapi_affinity_t affinity;
  mtapi_action_hndl_t action;
  mtapi_action_attributes_t action_attr;
  mtapi_job_hndl_t job;
  mtapi_uint_t ii;
  static const mtapi_uint_t kTaskCount = MTAPI_NODE_MAX_TASKS_DEFAULT + 100u;
  mtapi_task_attributes_t taskattr;
  mtapi_boolean_t detached = MTAPI_TRUE;

  status = MTAPI_ERR_UNKNOWN;
  mtapi_affinity_init(&affinity, MTAPI_TRUE, &status);
  MTAPI_CHECK_STATUS(status);

  status = MTAPI_ERR_UNKNOWN;
  mtapi_actionattr_init(&action_attr, &status);
  MTAPI_CHECK_STATUS(status);

  status = MTAPI_ERR_UNKNOWN;
  mtapi_actionattr_set(
    &action_attr,
    MTAPI_ACTION_AFFINITY,
    &affinity,
    MTAPI_ACTION_AFFINITY_SIZE,
    &status);
  MTAPI_CHECK_STATUS(status);

  status = MTAPI_ERR_UNKNOWN;
  action = mtapi_action_create(
    JOB_TEST_DETACHED_TASK,
    testDetachedTaskAction,
    MTAPI_NULL,
    0,
    &action_attr,
    &status);
  MTAPI_CHECK_STATUS(status);

  status = MTAPI_ERR_UNKNOWN;
  job = mtapi_job_get(JOB_TEST_DETACHED_TASK, THIS_DOMAIN_ID, &status);
  MTAPI_CHECK_STATUS(status);

  mtapi_taskattr_init(&taskattr, &status);
  MTAPI_CHECK_STATUS(status);
  mtapi_taskattr_set(&taskattr, MTAPI_TASK_DETACHED, &detached, sizeof(detached), &status);
  MTAPI_CHECK_STATUS(status);

  for (ii = 0; ii < kTaskCount; ii++) {
    status = MTAPI_ERR_UNKNOWN;
    mtapi_uint_t arg = ii;
    mtapi_task_start(
      TASK_TEST_ID,
      job,
      reinterpret_cast<const void*>(&arg),
      0,
      MTAPI_NULL,
      0,
      &taskattr,
      MTAPI_GROUP_NONE,
      &status);
    MTAPI_CHECK_STATUS(status);
  }

  testDoSomethingElse();

  status = MTAPI_ERR_UNKNOWN;
  mtapi_action_delete(action, 1000, &status);
  MTAPI_CHECK_STATUS(status);
}

void TaskTest::TryMultiInstance() {
  mtapi_status_t status;

  status = MTAPI_ERR_UNKNOWN;
  mtapi_action_hndl_t multiinstance_action = mtapi_action_create(
    JOB_TEST_MULTIINSTANCE_TASK,
    testMultiInstanceTaskAction,
    MTAPI_NULL,
    0,
    MTAPI_DEFAULT_ACTION_ATTRIBUTES,
    &status);
  MTAPI_CHECK_STATUS(status);

  status = MTAPI_ERR_UNKNOWN;
  mtapi_job_hndl_t multiinstance_job = mtapi_job_get(
    JOB_TEST_MULTIINSTANCE_TASK, THIS_DOMAIN_ID, &status);
  MTAPI_CHECK_STATUS(status);

  mtapi_task_attributes_t task_attr;

  status = MTAPI_ERR_UNKNOWN;
  mtapi_taskattr_init(&task_attr, &status);
  MTAPI_CHECK_STATUS(status);

  const mtapi_uint_t kTaskInstances = 5;

  status = MTAPI_ERR_UNKNOWN;
  mtapi_taskattr_set(&task_attr, MTAPI_TASK_INSTANCES,
    &kTaskInstances, sizeof(mtapi_uint_t),
    &status);
  MTAPI_CHECK_STATUS(status);

  mtapi_uint_t result[kTaskInstances];
  mtapi_uint_t ii;
  for (ii = 0; ii < kTaskInstances; ii++) {
    result[ii] = kTaskInstances + 1;
  }

  status = MTAPI_ERR_UNKNOWN;
  mtapi_task_hndl_t multiinstance_task =
    mtapi_task_start(MTAPI_TASK_ID_NONE, multiinstance_job,
      MTAPI_NULL, 0,
      &result[0], sizeof(mtapi_uint_t) * kTaskInstances,
      &task_attr,
      MTAPI_GROUP_NONE,
      &status);
  MTAPI_CHECK_STATUS(status);

  status = MTAPI_ERR_UNKNOWN;
  mtapi_task_wait(multiinstance_task, MTAPI_INFINITE, &status);
  MTAPI_CHECK_STATUS(status);

  for (ii = 0; ii < kTaskInstances; ii++) {
    PT_EXPECT_EQ(result[ii], ii);
  }

  status = MTAPI_ERR_UNKNOWN;
  mtapi_action_delete(multiinstance_action, 10, &status);
  MTAPI_CHECK_STATUS(status);
}

void TaskTest::TestBasic() {
  mtapi_node_attributes_t node_attr;
  mtapi_info_t info;
  mtapi_status_t status;

  embb_mtapi_log_info("running testTask...\n");

  status = MTAPI_ERR_UNKNOWN;
  mtapi_nodeattr_init(&node_attr, &status);
  MTAPI_CHECK_STATUS(status);

  status = MTAPI_ERR_UNKNOWN;
  mtapi_nodeattr_set(
    &node_attr,
    MTAPI_NODE_TYPE,
    MTAPI_ATTRIBUTE_VALUE(MTAPI_NODE_TYPE_SMP),
    MTAPI_ATTRIBUTE_POINTER_AS_VALUE,
    &status);
  MTAPI_CHECK_STATUS(status);

  status = MTAPI_ERR_UNKNOWN;
  mtapi_initialize(
    THIS_DOMAIN_ID,
    THIS_NODE_ID,
    &node_attr,
    &info,
    &status);
  MTAPI_CHECK_STATUS(status);

  embb_mtapi_log_trace("mtapi successfully initialized...\n");
  embb_mtapi_log_trace(
    "hardware concurrency   : %d\n", info.hardware_concurrency);
  embb_mtapi_log_trace("used memory            : %d\n", info.used_memory);

  TrySimple();
  TryDetached();
  TryMultiInstance();

  status = MTAPI_ERR_UNKNOWN;
  mtapi_finalize(&status);
  MTAPI_CHECK_STATUS(status);

  PT_EXPECT_EQ(embb_get_bytes_allocated(), 0u);

  embb_mtapi_log_info("...done\n\n");
}