//
// Copyright 2015 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.
//

#define LOG_TAG "vendor_manager"

#include "vendor_manager.h"

#include "base/bind.h"
#include "base/logging.h"

extern "C" {
#include "osi/include/log.h"
}  // extern "C"

namespace test_vendor_lib {

VendorManager* g_manager = nullptr;

// static
void VendorManager::CleanUp() {
  delete g_manager;
  g_manager = nullptr;
}

// static
VendorManager* VendorManager::Get() {
  // Initialize should have been called already.
  CHECK(g_manager);
  return g_manager;
}

// static
void VendorManager::Initialize() {
  CHECK(!g_manager);
  g_manager = new VendorManager();
}

VendorManager::VendorManager()
    : running_(false),
      test_channel_transport_(true, 6111),
      thread_("TestVendorLibrary"),
      weak_ptr_factory_(this) {}

bool VendorManager::Run() {
  CHECK(!running_);

  if (!transport_.SetUp()) {
    LOG_ERROR(LOG_TAG, "Error setting up transport object.");
    return false;
  }

  if (test_channel_transport_.IsEnabled()) {
    LOG_INFO(LOG_TAG, "Test channel is enabled.");

    if (test_channel_transport_.SetUp()) {
      controller_.RegisterHandlersWithTestChannelTransport(
          test_channel_transport_);
    } else {
      LOG_ERROR(LOG_TAG,
                "Error setting up test channel object, continuing without it.");
      test_channel_transport_.Disable();
    }
  } else {
    LOG_INFO(LOG_TAG, "Test channel is disabled.");
  }

  controller_.RegisterHandlersWithHciTransport(transport_);
  // TODO(dennischeng): Register PostDelayedEventResponse instead.
  controller_.RegisterDelayedEventChannel(
      std::bind(&HciTransport::PostDelayedEventResponse, &transport_,
                std::placeholders::_1, std::placeholders::_2));

  running_ = true;
  if (!thread_.StartWithOptions(
          base::Thread::Options(base::MessageLoop::TYPE_IO, 0))) {
    LOG_ERROR(LOG_TAG, "Error starting TestVendorLibrary thread.");
    running_ = false;
    return false;
  }

  if (!PostTask(base::Bind(&VendorManager::StartWatchingOnThread,
                           weak_ptr_factory_.GetWeakPtr()))) {
    LOG_ERROR(LOG_TAG, "Error posting StartWatchingOnThread to task runner.");
    running_ = false;
    return false;
  }

  return true;
}

void VendorManager::StartWatchingOnThread() {
  CHECK(running_);
  CHECK(base::MessageLoopForIO::IsCurrent());

  if (!base::MessageLoopForIO::current()->WatchFileDescriptor(
          transport_.GetVendorFd(), true,
          base::MessageLoopForIO::WATCH_READ_WRITE, &hci_watcher_,
          &transport_)) {
    LOG_ERROR(LOG_TAG, "Error watching vendor fd.");
    return;
  }

  if (test_channel_transport_.IsEnabled())
    if (!base::MessageLoopForIO::current()->WatchFileDescriptor(
            test_channel_transport_.GetFd(), true,
            base::MessageLoopForIO::WATCH_READ, &test_channel_watcher_,
            &test_channel_transport_))
      LOG_ERROR(LOG_TAG, "Error watching test channel fd.");
}

bool VendorManager::PostTask(const base::Closure& task) {
  return PostDelayedTask(task, base::TimeDelta::FromMilliseconds(0));
}

bool VendorManager::PostDelayedTask(const base::Closure& task,
                                    base::TimeDelta delay) {
  return thread_.task_runner()->PostDelayedTask(FROM_HERE, task, delay);
}

void VendorManager::SetVendorCallbacks(const bt_vendor_callbacks_t& callbacks) {
  vendor_callbacks_ = callbacks;
}

const bt_vendor_callbacks_t& VendorManager::GetVendorCallbacks() const {
  return vendor_callbacks_;
}

void VendorManager::CloseHciFd() {
  transport_.CloseHciFd();
}

int VendorManager::GetHciFd() const {
  return transport_.GetHciFd();
}

}  // namespace test_vendor_lib