// Copyright 2017 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.

#ifndef SERVICES_NETWORK_PROXY_CONFIG_SERVICE_MOJO_H_
#define SERVICES_NETWORK_PROXY_CONFIG_SERVICE_MOJO_H_

#include "base/component_export.h"
#include "base/macros.h"
#include "base/observer_list.h"
#include "base/optional.h"
#include "mojo/public/cpp/bindings/binding.h"
#include "net/proxy_resolution/proxy_config.h"
#include "net/proxy_resolution/proxy_config_service.h"
#include "net/proxy_resolution/proxy_config_with_annotation.h"
#include "services/network/public/mojom/proxy_config.mojom.h"
#include "services/network/public/mojom/proxy_config_with_annotation.mojom.h"

namespace net {
class ProxyConfigWithAnnotation;
}

namespace network {

// ProxyConfigService that gets its proxy configuration over a Mojo pipe.
class COMPONENT_EXPORT(NETWORK_SERVICE) ProxyConfigServiceMojo
    : public net::ProxyConfigService,
      public mojom::ProxyConfigClient {
 public:
  // |proxy_config_client_request| is the Mojo pipe over which new
  // configurations are received. |initial_proxy_config| is the initial proxy
  // configuration. If nullptr, waits for the initial configuration over
  // |proxy_config_client_request|. Either |proxy_config_client_request| or
  // |initial_proxy_config| must be non-null. If |proxy_config_client_request|
  // and |proxy_poller_client| are non-null, calls into |proxy_poller_client|
  // whenever OnLazyPoll() is invoked.
  explicit ProxyConfigServiceMojo(
      mojom::ProxyConfigClientRequest proxy_config_client_request,
      base::Optional<net::ProxyConfigWithAnnotation> initial_proxy_config,
      mojom::ProxyConfigPollerClientPtrInfo proxy_poller_client);
  ~ProxyConfigServiceMojo() override;

  // net::ProxyConfigService implementation:
  void AddObserver(Observer* observer) override;
  void RemoveObserver(Observer* observer) override;
  ConfigAvailability GetLatestProxyConfig(
      net::ProxyConfigWithAnnotation* config) override;
  void OnLazyPoll() override;

 private:
  // mojom::ProxyConfigClient implementation:
  void OnProxyConfigUpdated(
      const net::ProxyConfigWithAnnotation& proxy_config) override;

  mojom::ProxyConfigPollerClientPtr proxy_poller_client_;

  net::ProxyConfigWithAnnotation config_;
  bool config_pending_ = true;

  mojo::Binding<mojom::ProxyConfigClient> binding_;

  base::ObserverList<Observer>::Unchecked observers_;

  DISALLOW_COPY_AND_ASSIGN(ProxyConfigServiceMojo);
};

}  // namespace network

#endif  // SERVICES_NETWORK_PROXY_CONFIG_SERVICE_MOJO_H_