//
// Copyright (C) 2016 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.
//

#ifndef UPDATE_ENGINE_BINDER_SERVICE_BRILLO_H_
#define UPDATE_ENGINE_BINDER_SERVICE_BRILLO_H_

#include <utils/Errors.h>

#include <memory>
#include <string>
#include <vector>

#include <utils/RefBase.h>

#include "update_engine/common_service.h"
#include "update_engine/parcelable_update_engine_status.h"
#include "update_engine/service_observer_interface.h"

#include "android/brillo/BnUpdateEngine.h"
#include "android/brillo/IUpdateEngineStatusCallback.h"

namespace chromeos_update_engine {

class BinderUpdateEngineBrilloService : public android::brillo::BnUpdateEngine,
                                        public ServiceObserverInterface {
 public:
  explicit BinderUpdateEngineBrilloService(SystemState* system_state)
      : common_(new UpdateEngineService(system_state)) {}
  virtual ~BinderUpdateEngineBrilloService() = default;

  const char* ServiceName() const {
    return "android.brillo.UpdateEngineService";
  }

  // ServiceObserverInterface overrides.
  void SendStatusUpdate(int64_t last_checked_time,
                        double progress,
                        update_engine::UpdateStatus status,
                        const std::string& new_version,
                        int64_t new_size) override;
  void SendPayloadApplicationComplete(ErrorCode error_code) override {}
  // Channel tracking changes are ignored.
  void SendChannelChangeUpdate(const std::string& tracking_channel) override {}

  // android::brillo::BnUpdateEngine overrides.
  android::binder::Status AttemptUpdate(const android::String16& app_version,
                                        const android::String16& omaha_url,
                                        int flags) override;
  android::binder::Status AttemptRollback(bool powerwash) override;
  android::binder::Status CanRollback(bool* out_can_rollback) override;
  android::binder::Status ResetStatus() override;
  android::binder::Status GetStatus(
      android::brillo::ParcelableUpdateEngineStatus* status);
  android::binder::Status RebootIfNeeded() override;
  android::binder::Status SetChannel(const android::String16& target_channel,
                                     bool powerwash) override;
  android::binder::Status GetChannel(bool get_current_channel,
                                     android::String16* out_channel) override;
  android::binder::Status SetCohortHint(
      const android::String16& cohort_hint) override;
  android::binder::Status GetCohortHint(
      android::String16* out_cohort_hint) override;
  android::binder::Status SetP2PUpdatePermission(bool enabled) override;
  android::binder::Status GetP2PUpdatePermission(
      bool* out_p2p_permission) override;
  android::binder::Status SetUpdateOverCellularPermission(
      bool enabled) override;
  android::binder::Status GetUpdateOverCellularPermission(
      bool* out_cellular_permission) override;
  android::binder::Status GetDurationSinceUpdate(
      int64_t* out_duration) override;
  android::binder::Status GetPrevVersion(
      android::String16* out_prev_version) override;
  android::binder::Status GetRollbackPartition(
      android::String16* out_rollback_partition) override;
  android::binder::Status RegisterStatusCallback(
      const android::sp<android::brillo::IUpdateEngineStatusCallback>& callback)
      override;
  android::binder::Status GetLastAttemptError(
      int* out_last_attempt_error) override;
  android::binder::Status GetEolStatus(int* out_eol_status) override;

 private:
  // Generic function for dispatching to the common service.
  template <typename... Parameters, typename... Arguments>
  android::binder::Status CallCommonHandler(
      bool (UpdateEngineService::*Handler)(brillo::ErrorPtr*, Parameters...),
      Arguments... arguments);

  // To be used as a death notification handler only.
  void UnregisterStatusCallback(
      android::brillo::IUpdateEngineStatusCallback* callback);

  std::unique_ptr<UpdateEngineService> common_;

  std::vector<android::sp<android::brillo::IUpdateEngineStatusCallback>>
      callbacks_;
};

}  // namespace chromeos_update_engine

#endif  // UPDATE_ENGINE_BINDER_SERVICE_BRILLO_H_