/*
 * Copyright (C) 2021 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 "test_util.h"

#include <gtest/gtest.h>

#include "chre/core/event_loop_manager.h"
#include "chre/core/nanoapp.h"
#include "chre/util/dynamic_vector.h"
#include "chre/util/macros.h"
#include "chre/util/memory.h"
#include "chre_api/chre/version.h"
#include "nanoapp/include/chre_nsl_internal/platform/shared/nanoapp_support_lib_dso.h"

namespace chre {

namespace {

// Keep the chreNslNanoappInfo instances alive for the lifetime of the
// test nanoapps.
DynamicVector<UniquePtr<chreNslNanoappInfo>> gNanoappInfos;

}  // namespace

UniquePtr<Nanoapp> createStaticNanoapp(
    const char *name, uint64_t appId, uint32_t appVersion, uint32_t appPerms,
    decltype(nanoappStart) *startFunc,
    decltype(nanoappHandleEvent) *handleEventFunc,
    decltype(nanoappEnd) *endFunc) {
  auto nanoapp = MakeUnique<Nanoapp>();
  auto nanoappInfo = MakeUnique<chreNslNanoappInfo>();
  chreNslNanoappInfo *appInfo = nanoappInfo.get();
  gNanoappInfos.push_back(std::move(nanoappInfo));
  appInfo->magic = CHRE_NSL_NANOAPP_INFO_MAGIC;
  appInfo->structMinorVersion = CHRE_NSL_NANOAPP_INFO_STRUCT_MINOR_VERSION;
  appInfo->targetApiVersion = CHRE_API_VERSION;
  appInfo->vendor = "Google";
  appInfo->name = name;
  appInfo->isSystemNanoapp = true;
  appInfo->isTcmNanoapp = true;
  appInfo->appId = appId;
  appInfo->appVersion = appVersion;
  appInfo->entryPoints.start = startFunc;
  appInfo->entryPoints.handleEvent = handleEventFunc;
  appInfo->entryPoints.end = endFunc;
  appInfo->appVersionString = "<undefined>";
  appInfo->appPermissions = appPerms;
  EXPECT_FALSE(nanoapp.isNull());
  nanoapp->loadStatic(appInfo);

  return nanoapp;
}

void deleteNanoappInfos() {
  gNanoappInfos.clear();
}

bool defaultNanoappStart() {
  return true;
}

void defaultNanoappHandleEvent(uint32_t senderInstanceId, uint16_t eventType,
                               const void *eventData) {
  UNUSED_VAR(senderInstanceId);
  UNUSED_VAR(eventType);
  UNUSED_VAR(eventData);
}

void defaultNanoappEnd(){};

void loadNanoapp(const char *name, uint64_t appId, uint32_t appVersion,
                 uint32_t appPerms, decltype(nanoappStart) *startFunc,
                 decltype(nanoappHandleEvent) *handleEventFunc,
                 decltype(nanoappEnd) *endFunc) {
  UniquePtr<Nanoapp> nanoapp = createStaticNanoapp(
      name, appId, appVersion, appPerms, startFunc, handleEventFunc, endFunc);

  EventLoopManagerSingleton::get()->deferCallback(
      SystemCallbackType::FinishLoadingNanoapp, std::move(nanoapp),
      testFinishLoadingNanoappCallback);

  TestEventQueueSingleton::get()->waitForEvent(
      CHRE_EVENT_SIMULATION_TEST_NANOAPP_LOADED);
}

template <>
void unloadNanoapp<uint64_t>(uint64_t appId) {
  uint64_t *ptr = memoryAlloc<uint64_t>();
  ASSERT_NE(ptr, nullptr);
  *ptr = appId;
  EventLoopManagerSingleton::get()->deferCallback(
      SystemCallbackType::HandleUnloadNanoapp, ptr,
      testFinishUnloadingNanoappCallback);

  TestEventQueueSingleton::get()->waitForEvent(
      CHRE_EVENT_SIMULATION_TEST_NANOAPP_UNLOADED);
}

void testFinishLoadingNanoappCallback(SystemCallbackType /* type */,
                                      UniquePtr<Nanoapp> &&nanoapp) {
  EventLoopManagerSingleton::get()->getEventLoop().startNanoapp(nanoapp);
  TestEventQueueSingleton::get()->pushEvent(
      CHRE_EVENT_SIMULATION_TEST_NANOAPP_LOADED);
}

void testFinishUnloadingNanoappCallback(uint16_t /* type */, void *data,
                                        void * /* extraData */) {
  EventLoop &eventLoop = EventLoopManagerSingleton::get()->getEventLoop();
  uint16_t instanceId = 0;
  uint64_t *appId = static_cast<uint64_t *>(data);
  eventLoop.findNanoappInstanceIdByAppId(*appId, &instanceId);
  eventLoop.unloadNanoapp(instanceId, true);
  memoryFree(data);
  TestEventQueueSingleton::get()->pushEvent(
      CHRE_EVENT_SIMULATION_TEST_NANOAPP_UNLOADED);
}

void freeTestEventDataCallback(uint16_t /*eventType*/, void *eventData) {
  auto testEvent = static_cast<TestEvent *>(eventData);
  memoryFree(testEvent->data);
  memoryFree(testEvent);
}

}  // namespace chre