#include "TcpController.h"
#include <QDebug>
#include <QDir>

TcpController::TcpController(QObject* parent)
    : QObject(parent)
{
    // map the requesr url and the handler
    routes.insert("set_ipaddr", std::bind(&TcpController::setIpaddr, this, std::placeholders::_1));
    routes.insert("set_video_enc", std::bind(&TcpController::setVideoEnc, this, std::placeholders::_1));
    routes.insert("get_file_list", std::bind(&TcpController::getFileList, this, std::placeholders::_1));
    routes.insert("delete_file", std::bind(&TcpController::deleteFile, this, std::placeholders::_1));
}

Routes TcpController::getRoutes()
{
    return this->routes;
}

/**
 * @brief set box's ip address
 * @param socket
 */
void TcpController::setIpaddr(QTcpSocket* socket)
{
}

/**
 * @brief set the video encode params
 * @param socket
 */
void TcpController::setVideoEnc(QTcpSocket* socket)
{
}

/**
 * @brief get the video file list
 * @param socket
 */
void TcpController::getFileList(QTcpSocket* socket)
{
    QDir dir("/root/usb/videos");
    if (!dir.exists()) {
        qDebug() << "dictionary /root/usb/videos dont exists";
        return;
    }
    dir.setFilter(QDir::Files);
    dir.setSorting(QDir::Name);
    QStringList nameFilters;
    nameFilters << "*.mp4";
    dir.setNameFilters(nameFilters);
    QStringList fileList = dir.entryList();
    QString data = fileList.join(",");
    socket->write(data.toStdString().data());
}

/**
 * @brief download video file
 * @param socket
 */
void TcpController::downloadFile(QTcpSocket* socket)
{
    QString url = socket->readLine().trimmed();
    QString fileName = url.split("=")[1];
    fileName = "/root/usb/videos/" + fileName;
    qDebug() << fileName;

    QFile file(fileName);
    if (!file.open(QIODevice::ReadOnly)) {
        qDebug() << "read file failed";
        return;
    }
    int64_t sendSize = 0;
    int64_t fileSize = file.size();

    socket->write(QString("fileSize=%1\r\n").arg(fileSize).toStdString().data());

    // loop reading and sending file, 15k bytes once
    while (sendSize < fileSize) {
        char buf[1024 * 15] = { 0 };
        int len = file.read(buf, sizeof(buf));
        len = socket->write(buf, len);
        sendSize += len;
    }
    qDebug() << "send file to " << socket << "end!";
    file.close();
}

/**
 * @brief delete video file by file name
 * @param socket
 */
void TcpController::deleteFile(QTcpSocket* socket)
{
    QString data = socket->readLine().trimmed();
    QString fileName = data.split("=")[1];
}