// Copyright 2021 Google LLC. All Rights Reserved. This file and proprietary
// source code may only be used and distributed under the Widevine License
// Agreement.
#ifndef WVCDM_CORE_OKP_SYSTEM_INFO_H_
#define WVCDM_CORE_OKP_SYSTEM_INFO_H_

#include <inttypes.h>

#include "wv_class_utils.h"

namespace wvcdm {
// OTA Keybox Provisioning (OKP)
namespace okp {
enum class SystemState {
  kUnknown = 0,
  kNeedsProvisioning = 1,
  kFallbackMode = 2,  // Fallback indicates provisioning is needed.
  kProvisioned = 3
  // Note: "Not needed" is represented by an absence of info.
};
// Converts a SystemState value to a human readable string.  Intended
// to be used for debug logging.
const char* SystemStateToString(SystemState state);

// Container for all the device information related to OKP.
class SystemFallbackInfo {
 public:
  constexpr SystemFallbackInfo() = default;
  WVCDM_CONSTEXPR_DEFAULT_COPY_AND_MOVE(SystemFallbackInfo);

  constexpr SystemState state() const { return state_; }
  constexpr void SetState(SystemState state) { state_ = state; }

  constexpr bool HasFirstCheckedTime() const {
    return first_checked_time_ != 0;
  }
  constexpr int64_t first_checked_time() const { return first_checked_time_; }
  constexpr void SetFirstCheckedTime(int64_t time) {
    first_checked_time_ = (time > 0 ? time : 0);
  }

  constexpr bool HasBackoffStartTime() const { return backoff_start_time_ > 0; }
  constexpr int64_t backoff_start_time() const { return backoff_start_time_; }
  constexpr void SetBackoffStartTime(int64_t time) {
    backoff_start_time_ = (time > 0 ? time : 0);
  }
  constexpr void ClearBackoffStartTime() { backoff_start_time_ = 0; }

  constexpr bool HasBackoffDuration() const { return backoff_duration_ > 0; }
  constexpr int64_t backoff_duration() const { return backoff_duration_; }
  constexpr void SetBackoffDuration(int64_t duration) {
    backoff_duration_ = (duration > 0 ? duration : 0);
  }
  constexpr void DoubleBackoffDuration() { backoff_duration_ *= 2; }
  constexpr void ClearBackoffDuration() { backoff_duration_ = 0; }

  constexpr bool HasProvisioningTime() const { return provisioning_time_ != 0; }
  constexpr int64_t provisioning_time() const { return provisioning_time_; }
  constexpr void SetProvisioningTime(int64_t time) {
    provisioning_time_ = (time > 0 ? time : 0);
  }
  constexpr void ClearProvisioningTime() { provisioning_time_ = 0; }

  constexpr void Clear() {
    state_ = SystemState::kUnknown;
    first_checked_time_ = 0;
    backoff_start_time_ = 0;
    backoff_duration_ = 0;
    provisioning_time_ = 0;
  }

  bool IsEqualTo(const SystemFallbackInfo& other) const;
  WVCDM_DEFINE_EQ_OPERATORS(SystemFallbackInfo);

 private:
  SystemState state_ = SystemState::kUnknown;
  int64_t first_checked_time_ = 0;
  int64_t backoff_start_time_ = 0;
  int64_t backoff_duration_ = 0;
  int64_t provisioning_time_ = 0;
};  // class SystemFallbackInfo
}  // namespace okp
}  // namespace wvcdm
#endif  // WVCDM_CORE_OKP_SYSTEM_INFO_H_