//
// Copyright (C) 2018 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.
//
#include "update_engine/update_manager/update_time_restrictions_policy_impl.h"

#include <memory>

#include <base/time/time.h>

#include "update_engine/update_manager/device_policy_provider.h"
#include "update_engine/update_manager/system_provider.h"
#include "update_engine/update_manager/weekly_time.h"

using base::Time;
using base::TimeDelta;

using chromeos_update_engine::ErrorCode;
using chromeos_update_engine::InstallPlan;

namespace chromeos_update_manager {

EvalStatus UpdateTimeRestrictionsPolicyImpl::UpdateCanBeApplied(
    EvaluationContext* ec,
    State* state,
    std::string* error,
    ErrorCode* result,
    InstallPlan* install_plan) const {
  DevicePolicyProvider* const dp_provider = state->device_policy_provider();
  TimeProvider* const time_provider = state->time_provider();

  // If kiosk mode is not enabled, don't restrict updates.
  if (!ec->GetValue(dp_provider->var_auto_launched_kiosk_app_id()))
    return EvalStatus::kContinue;

  const Time* curr_date = ec->GetValue(time_provider->var_curr_date());
  const int* curr_hour = ec->GetValue(time_provider->var_curr_hour());
  const int* curr_minute = ec->GetValue(time_provider->var_curr_minute());
  if (!curr_date || !curr_hour || !curr_minute) {
    LOG(WARNING) << "Unable to access local time.";
    return EvalStatus::kContinue;
  }

  WeeklyTime now = WeeklyTime::FromTime(*curr_date);
  now.AddTime(TimeDelta::FromHours(*curr_hour) +
              TimeDelta::FromMinutes(*curr_minute));

  const WeeklyTimeIntervalVector* intervals =
      ec->GetValue(dp_provider->var_disallowed_time_intervals());
  if (!intervals) {
    return EvalStatus::kContinue;
  }
  for (const auto& interval : *intervals) {
    if (interval.InRange(now)) {
      *result = ErrorCode::kOmahaUpdateDeferredPerPolicy;
      return EvalStatus::kAskMeAgainLater;
    }
  }

  return EvalStatus::kContinue;
}

}  // namespace chromeos_update_manager