// Copyright 2018 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 CHROME_BROWSER_APPS_APP_SERVICE_ARC_APPS_H_
#define CHROME_BROWSER_APPS_APP_SERVICE_ARC_APPS_H_

#include <string>
#include <vector>

#include "base/callback_forward.h"
#include "base/macros.h"
#include "chrome/browser/ui/app_list/arc/arc_app_list_prefs.h"
#include "chrome/services/app_service/public/mojom/app_service.mojom.h"
#include "components/arc/connection_observer.h"
#include "components/keyed_service/core/keyed_service.h"
#include "mojo/public/cpp/bindings/binding.h"
#include "mojo/public/cpp/bindings/interface_ptr_set.h"

class Profile;

namespace apps {

// An app publisher (in the App Service sense) of ARC++ apps,
//
// See chrome/services/app_service/README.md.
class ArcApps : public KeyedService,
                public apps::mojom::Publisher,
                public arc::ConnectionObserver<arc::mojom::AppInstance>,
                public ArcAppListPrefs::Observer {
 public:
  using AppConnectionHolder =
      arc::ConnectionHolder<arc::mojom::AppInstance, arc::mojom::AppHost>;

  static ArcApps* Get(Profile* profile);

  explicit ArcApps(Profile* profile);

  ~ArcApps() override;

 private:
  // apps::mojom::Publisher overrides.
  void Connect(apps::mojom::SubscriberPtr subscriber,
               apps::mojom::ConnectOptionsPtr opts) override;
  void LoadIcon(const std::string& app_id,
                apps::mojom::IconKeyPtr icon_key,
                apps::mojom::IconCompression icon_compression,
                int32_t size_hint_in_dip,
                LoadIconCallback callback) override;
  void Launch(const std::string& app_id,
              int32_t event_flags,
              apps::mojom::LaunchSource launch_source,
              int64_t display_id) override;
  void SetPermission(const std::string& app_id,
                     apps::mojom::PermissionPtr permission) override;

  // arc::ConnectionObserver<arc::mojom::AppInstance> overrides.
  void OnConnectionReady() override;

  // ArcAppListPrefs::Observer overrides.
  // TODO(crbug.com/826982): implement.

  void ObservePrefs();

  apps::mojom::AppPtr Convert(const std::string& app_id,
                              const ArcAppListPrefs::AppInfo& app_info);

  mojo::Binding<apps::mojom::Publisher> binding_;
  mojo::InterfacePtrSet<apps::mojom::Subscriber> subscribers_;

  Profile* profile_;
  ArcAppListPrefs* prefs_;

  std::vector<base::OnceCallback<void(AppConnectionHolder*)>>
      pending_load_icon_calls_;

  // |next_u_key_| is incremented every time Convert returns a valid AppPtr, so
  // that when an app's icon has changed, this apps::mojom::Publisher sends a
  // different IconKey even though the IconKey's s_key hasn't changed.
  uint64_t next_u_key_;

  DISALLOW_COPY_AND_ASSIGN(ArcApps);
};

}  // namespace apps

#endif  // CHROME_BROWSER_APPS_APP_SERVICE_ARC_APPS_H_