// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "services/data_decoder/data_decoder_service.h"

#include "base/macros.h"
#include "base/memory/ptr_util.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/time/time.h"
#include "mojo/public/cpp/bindings/strong_binding.h"
#include "services/data_decoder/image_decoder_impl.h"
#include "services/data_decoder/json_parser_impl.h"
#include "services/data_decoder/public/interfaces/image_decoder.mojom.h"
#include "services/data_decoder/xml_parser.h"
#include "services/service_manager/public/cpp/service_context.h"

namespace data_decoder {

namespace {

void OnImageDecoderRequest(
    service_manager::ServiceContextRefFactory* ref_factory,
    mojom::ImageDecoderRequest request) {
  mojo::MakeStrongBinding(
      std::make_unique<ImageDecoderImpl>(ref_factory->CreateRef()),
      std::move(request));
}

void OnJsonParserRequest(service_manager::ServiceContextRefFactory* ref_factory,
                         mojom::JsonParserRequest request) {
  mojo::MakeStrongBinding(
      std::make_unique<JsonParserImpl>(ref_factory->CreateRef()),
      std::move(request));
}

void OnXmlParserRequest(service_manager::ServiceContextRefFactory* ref_factory,
                        mojom::XmlParserRequest request) {
  mojo::MakeStrongBinding(base::MakeUnique<XmlParser>(ref_factory->CreateRef()),
                          std::move(request));
}

}  // namespace

DataDecoderService::DataDecoderService() : weak_factory_(this) {}

DataDecoderService::~DataDecoderService() = default;

// static
std::unique_ptr<service_manager::Service> DataDecoderService::Create() {
  return std::make_unique<DataDecoderService>();
}

void DataDecoderService::OnStart() {
  ref_factory_.reset(new service_manager::ServiceContextRefFactory(base::Bind(
      &DataDecoderService::MaybeRequestQuitDelayed, base::Unretained(this))));
  registry_.AddInterface(
      base::Bind(&OnImageDecoderRequest, ref_factory_.get()));
  registry_.AddInterface(base::Bind(&OnJsonParserRequest, ref_factory_.get()));
  registry_.AddInterface(base::Bind(&OnXmlParserRequest, ref_factory_.get()));
}

void DataDecoderService::OnBindInterface(
    const service_manager::BindSourceInfo& source_info,
    const std::string& interface_name,
    mojo::ScopedMessagePipeHandle interface_pipe) {
  registry_.BindInterface(interface_name, std::move(interface_pipe));
}

void DataDecoderService::MaybeRequestQuitDelayed() {
  base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
      FROM_HERE,
      base::Bind(&DataDecoderService::MaybeRequestQuit,
                 weak_factory_.GetWeakPtr()),
      base::TimeDelta::FromSeconds(5));
}

void DataDecoderService::MaybeRequestQuit() {
  DCHECK(ref_factory_);
  if (ref_factory_->HasNoRefs())
    context()->RequestQuit();
}

}  // namespace data_decoder