/**
  * brief 程序比较小，将接口层和控制层合到一起；主要做一些任务分发，状态监控等一些简单工作；复杂的耗时的逻辑放到任务中moveToThread中去执行
  */

#include <mutex>
#include "mybackupmanager.h"
#include "../common/utils.h"
#include "mymountproxy.h"
#include "workerfactory.h"

/**
 * @brief 构造函数
 */
MyBackupManager::MyBackupManager()
{
    // 注册BackupWrapper类型，之后qdbus接口才能使用
    BackupWrapper::registerMetaType();
}

/**
 * @brief 析构函数
 */
MyBackupManager::~MyBackupManager()
{
    if (workerThread.isRunning()) {
        workerThread.quit();
        workerThread.wait();
    }
}

/**
 * @brief 挂载backup分区，兼容提供给自动更新模块的老接口
 * @return
 */
int MyBackupManager::Mount_backup_partition()
{
    MyMountProxy mymount;
    return int(mymount.mountBackupPartition());
}

/**
 * @brief 环境检测
 * @param backupWrapper，参数
 * @return
 */
int MyBackupManager::checkEnv(const BackupWrapper& backupWrapper)
{
    if (m_isActive || !lock(backupWrapper.m_frontUid)) {
        emit sendEnvCheckResult(int(BackupResult::LOCK_PROGRAM_FAIL));
        return int(BackupResult::LOCK_PROGRAM_FAIL);
    }

    Worker* worker = WorkerFactory::createWorker(backupWrapper.m_type, backupWrapper.m_iPosition);
    if (nullptr == worker) {
        emit sendEnvCheckResult(int(BackupResult::NO_FOUND_DEALCLASS));
        return int(BackupResult::NO_FOUND_DEALCLASS);
    }

    worker->setParam(backupWrapper);
    connect(worker, &Worker::checkResult, this, &MyBackupManager::sendEnvCheckResult);
    connect(worker, &Worker::checkResult, this, &MyBackupManager::finished);
    worker->moveToThread(&workerThread);
    connect(&workerThread, &QThread::started, worker, &Worker::checkEnv);
    connect(&workerThread, &QThread::finished, worker, &Worker::deleteLater);

    return int(BackupResult::BACKUP_RESULT_INIT);
}

/**
 * @brief 备份
 * @param backupWrapper
 * @return
 */
int MyBackupManager::goBackup(const BackupWrapper& backupWrapper)
{
    Q_UNUSED(backupWrapper)
    return 0;
}

/**
 * @brief 还原
 * @param backupWrapper
 * @return
 */
int MyBackupManager::goRestore(const BackupWrapper& backupWrapper)
{
    Q_UNUSED(backupWrapper)
    return 0;
}

/**
 * @brief 删除备份
 * @param backupWrapper
 * @return
 */
int MyBackupManager::deleteBackupPoint(const BackupWrapper& backupWrapper)
{
    Q_UNUSED(backupWrapper)
    return 0;
}

/**
 * @brief ghost镜像
 * @param backupWrapper
 * @return
 */
int MyBackupManager::ghostBackup(const BackupWrapper& backupWrapper)
{
    Q_UNUSED(backupWrapper)
    return 0;
}

/**
 * @brief 控制面板调用的备份接口，重构暂时先兼容以前的老接口
 * @param autobackup_name 备份名称
 * @param create_note 创建时备注
 * @param inc_note  增量备注
 * @param frontUserName 前端用户名
 * @param frontUid 前端用户id
 */
void MyBackupManager::autoBackUpForSystemUpdate_noreturn(const QString& autobackup_name, const QString& create_note, const QString& inc_note, const QString& frontUserName, int frontUid)
{
    Q_UNUSED(autobackup_name)
    Q_UNUSED(create_note)
    Q_UNUSED(inc_note)
    Q_UNUSED(frontUserName)
    Q_UNUSED(frontUid)

    return ;
}

/**
 * @brief 控制面板调用的获取系统备份接口
 * @param state
 * @return
 */
QString MyBackupManager::getBackupCommentForSystemUpdate(QString& state)
{
    Q_UNUSED(state)
    return "";
}

/**
 * @brief 获取备份状态
 * @param isActive，是否活动状态
 * @return
 */
int MyBackupManager::getBackupState(bool& isActive)
{
    Q_UNUSED(isActive)
    return 0;
}

/**
 * @brief 取消操作
 */
int MyBackupManager::cancel()
{
    return 0;
}

/**
 * @brief 任务结束
 */
void MyBackupManager::finished()
{
    if (workerThread.isRunning()) {
        workerThread.quit();
        workerThread.wait();
    }

    unlock();
}

/**
 * @brief 锁定应用
 * @param frontUid，锁定应用的用户id
 * @return bool
 */
bool MyBackupManager::lock(int frontUid)
{
    std::lock_guard<spinlock_mutex> lock(m_mutex);

    int lock_file_fd = Utils::lockProgram(frontUid);
    if (lock_file_fd < 0) {
        Utils::rmLockFile();
        return false;
    }

    m_fdLockFile = lock_file_fd;
    m_backupState = BackupState::PREPARING;
    m_isActive = true;

    return true;
}

/**
 * @brief 解锁应用
 * @return bool
 */
bool MyBackupManager::unlock()
{
    std::lock_guard<spinlock_mutex> lock(m_mutex);

    Utils::unLockProgram(m_fdLockFile);

    m_fdLockFile = -1;
    m_backupState = BackupState::BACKUP_STATE_INIT;
    m_isActive = false;

    return true;
}