// Copyright (C) 2023 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.

#pragma once

#include <chrono>
#include <string>

#include <libdm/dm.h>

namespace android {
namespace snapshot {

using android::dm::DeviceMapper;
using android::dm::DmTable;

class Tempdevice {
  public:
    Tempdevice(const std::string& name, const DmTable& table)
        : dm_(DeviceMapper::Instance()), name_(name), valid_(false) {
        valid_ = dm_.CreateDevice(name, table, &path_, std::chrono::seconds(5));
    }
    Tempdevice(Tempdevice&& other) noexcept
        : dm_(other.dm_), name_(other.name_), path_(other.path_), valid_(other.valid_) {
        other.valid_ = false;
    }
    ~Tempdevice() {
        if (valid_) {
            dm_.DeleteDeviceIfExists(name_);
        }
    }
    bool Destroy() {
        if (!valid_) {
            return true;
        }
        valid_ = false;
        return dm_.DeleteDeviceIfExists(name_);
    }
    const std::string& path() const { return path_; }
    const std::string& name() const { return name_; }
    bool valid() const { return valid_; }

    Tempdevice(const Tempdevice&) = delete;
    Tempdevice& operator=(const Tempdevice&) = delete;

    Tempdevice& operator=(Tempdevice&& other) noexcept {
        name_ = other.name_;
        valid_ = other.valid_;
        other.valid_ = false;
        return *this;
    }

  private:
    DeviceMapper& dm_;
    std::string name_;
    std::string path_;
    bool valid_;
};

}  // namespace snapshot
}  // namespace android