/*
 * Copyright (C) 2020 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 "app_test_base.h"

#include <gtest/gtest.h>

#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include <thread>

#include "chpp/app.h"
#include "chpp/clients/discovery.h"
#include "chpp/macros.h"
#include "chpp/platform/utils.h"
#include "chpp/transport.h"

namespace chpp {
namespace {

void *workThread(void *arg) {
  ChppTransportState *transportContext = static_cast<ChppTransportState *>(arg);
  struct ChppLinuxLinkState *linkContext =
      (struct ChppLinuxLinkState *)(transportContext->linkContext);
  pthread_setname_np(pthread_self(), linkContext->workThreadName);

  chppWorkThreadStart(transportContext);

  return nullptr;
}

}  // anonymous namespace

void AppTestBase::SetUp() {
  chppClearTotalAllocBytes();
  memset(&mClientLinkContext, 0, sizeof(mClientLinkContext));
  memset(&mServiceLinkContext, 0, sizeof(mServiceLinkContext));
  // The linkSendThread in the link layer is a link "to" the remote end.
  mServiceLinkContext.linkThreadName = "Link to client";
  mServiceLinkContext.workThreadName = "Service work";
  mServiceLinkContext.isLinkActive = true;
  mServiceLinkContext.remoteLinkState = &mClientLinkContext;
  mServiceLinkContext.rxInRemoteEndpointWorker = false;

  mClientLinkContext.linkThreadName = "Link to service";
  mClientLinkContext.workThreadName = "Client work";
  mClientLinkContext.isLinkActive = true;
  mClientLinkContext.remoteLinkState = &mServiceLinkContext;
  mClientLinkContext.rxInRemoteEndpointWorker = false;

  struct ChppClientServiceSet set;
  memset(&set, 0, sizeof(set));
  set.wifiClient = 1;
  set.gnssClient = 1;
  set.wwanClient = 1;
  set.loopbackClient = 1;

  const struct ChppLinkApi *linkApi = getLinuxLinkApi();

  chppTransportInit(&mClientTransportContext, &mClientAppContext,
                    &mClientLinkContext, linkApi);
  chppAppInitWithClientServiceSet(&mClientAppContext, &mClientTransportContext,
                                  set);
  pthread_create(&mClientWorkThread, NULL, workThread,
                 &mClientTransportContext);

  // Wait a bit to emulate the scenario where the remote is not yet up
  std::this_thread::sleep_for(std::chrono::milliseconds(450));

  memset(&set, 0, sizeof(set));
  set.wifiService = 1;
  set.gnssService = 1;
  set.wwanService = 1;

  chppTransportInit(&mServiceTransportContext, &mServiceAppContext,
                    &mServiceLinkContext, linkApi);
  chppAppInitWithClientServiceSet(&mServiceAppContext,
                                  &mServiceTransportContext, set);
  pthread_create(&mServiceWorkThread, NULL, workThread,
                 &mServiceTransportContext);

  mClientLinkContext.linkEstablished = true;
  mServiceLinkContext.linkEstablished = true;

  constexpr uint64_t kResetWaitTimeMs = 5000;
  EXPECT_TRUE(chppTransportWaitForResetComplete(&mClientTransportContext,
                                                kResetWaitTimeMs));
  EXPECT_TRUE(chppTransportWaitForResetComplete(&mServiceTransportContext,
                                                kResetWaitTimeMs));

  constexpr uint64_t kDiscoveryWaitTimeMs = 5000;
  EXPECT_TRUE(
      chppWaitForDiscoveryComplete(&mClientAppContext, kDiscoveryWaitTimeMs));
  EXPECT_TRUE(
      chppWaitForDiscoveryComplete(&mServiceAppContext, kDiscoveryWaitTimeMs));
}

void AppTestBase::TearDown() {
  // Stop the work threads first to avoid any transient activity.
  chppWorkThreadStop(&mClientTransportContext);
  chppWorkThreadStop(&mServiceTransportContext);
  pthread_join(mClientWorkThread, NULL);
  pthread_join(mServiceWorkThread, NULL);

  chppAppDeinit(&mClientAppContext);
  chppTransportDeinit(&mClientTransportContext);

  chppAppDeinit(&mServiceAppContext);
  chppTransportDeinit(&mServiceTransportContext);

  EXPECT_EQ(chppGetTotalAllocBytes(), 0);
}

}  // namespace chpp