#include "CheckStorageThread.h"
#include "Constant.h"
#include "Log.h"
#include "Tool.h"
#include <QFile>
#include <QMutex>
#include <QWaitCondition>

// 磁盘剩余最小容量
#define THRESHOLD 10 * 1024 * 1024
// 检查间隔
#define INTERVAL 10 * 60 * 1000

extern QString curFilename;
extern QMutex mutex;
extern QWaitCondition condition;

CheckStorageThread::CheckStorageThread()
{
}

/**
 * @brief check available storage each 10 min
 */
void CheckStorageThread::run()
{
    while (true) {
        int64_t available = Tool::getAvailableStorage(Constant::MountedPath);
        if (available < THRESHOLD) {
            Log::info("there are not enough storage, then remove some files...");
            // get the file list
            QStringList fileList = Tool::getFileList(QString("%1/%2").arg(Constant::VideoPath).arg(Constant::MainChannel));
            if (!fileList.isEmpty()) {
                // remove the first video file
                QString filename = fileList.first();
                // wait until file is not playing
                mutex.lock();
                if (filename == curFilename) {
                    Log::info("{} is playing, wait for play end and remove the files...", filename.toStdString());
                    condition.wait(&mutex);
                    Log::info("check thread end wait...");
                }
                mutex.unlock();
                // start remove file
                QString path = QString("%1/%2/%3").arg(Constant::VideoPath).arg(Constant::MainChannel).arg(filename);
                bool ret = Tool::removeFile(path);
                if (!ret) {
                    Log::error("remove file {} failed", path.toStdString());
                }
                path = QString("%1/%2/%3").arg(Constant::VideoPath).arg(Constant::SecondaryChannel).arg(filename);
                ret = Tool::removeFile(path);
                if (!ret) {
                    Log::error("remove file {} failed", path.toStdString());
                }
            }
        }
        QThread::msleep(INTERVAL);
    }
}