// RecvDataHandler.cpp
#include "RecvDataHandler.h"
#include "../Network/ClientHandler.h"

DataHandler::DataHandler(QLabel* leftLens_imageLabel, QLabel* rightLens_imageLabel, QLabel* videoLabel, QObject* parent)
    : QObject(parent),
    leftLens_m_imageLabel(leftLens_imageLabel),
    rightLens_m_imageLabel(rightLens_imageLabel),
    videoLabel(videoLabel),
    ffmpegDecoder(new FFmpegDecoder()), // 初始化FFmpeg解码器
    buffer(new QByteArray()) 
{
    ffmpegDecoder->initialize();       // 初始化解码器
    clearAllRecvData();
}

DataHandler::~DataHandler()
{
    delete ffmpegDecoder;  // 释放解码器
    delete buffer; 
}

// 将十六进制字符串转换为 QByteArray
QByteArray DataHandler::hexStringToByteArray(const QString& hexString)
{
    QByteArray byteArray;
    for (int i = 0; i < hexString.length(); i += 2) {
        byteArray.append(static_cast<char>(hexString.mid(i, 2).toUShort(nullptr, 16)));
    }
    return byteArray;
}

const QString filePath_1 = "add1.h264";

// 显示视频的函数
void DataHandler::showVideo(const QString& client, const QByteArray& valData)
{
    static QFile file(filePath_1);

    if (!file.isOpen()) {
        if (QFile::exists(filePath_1)) {
            QFile::remove(filePath_1);
        }
        if (!file.open(QIODevice::Append | QIODevice::WriteOnly)) {
            qWarning() << "无法打开H264文件:" << file.errorString();
            return;
        }
    }

    //qDebug() << "==========valData.size:" << valData.size();
    if (!valData.isEmpty()) {
        file.write(valData);
        file.flush();   // 刷新文件缓冲区，以确保数据写入磁盘
        qWarning() << " ------------ write ------------" ;
    }
    //qint64 elapsed = timer.elapsed(); // 获取经过的时间（毫秒）
    //qDebug() << "Time spent writing file:" << elapsed << "ms";

    if (!start_run) {
        start_run = 1;
        ffmpegDecoder->decodeFile(filePath_1, videoLabel);
    }
    //ffmpegDecoder->decodeFile(filePath_1, videoLabel);
}

void DataHandler::clearAllRecvData() {
    allRecvData = QByteArray();
    remain = 0;
    dataLen = 0;
}

void DataHandler::handleCmd(unsigned char msg_id, const QString& client, QByteArray actual_data)
{
    switch (msg_id) {
        case 0x19:
        {
            showPic(leftLens_m_imageLabel, rightLens_m_imageLabel, client, actual_data);
        }
        break; 

        case 0x11:
        {
            showVideo(client, actual_data);
        }
        break;

        default:
        {}
        break;
    }
}

// 处理接收到的数据
void DataHandler::handleData(const QString& client, const QByteArray& recvData, unsigned char msg_id,
                             int   currentRecvItemIndex, int   currentRecvFuncItemIndex,
                             const QString& itemData, const QString& funcItemData)
{
    //qDebug() << "Data received from" << client << ":" << recvData;
#if 0
     从文件中读取YUV数据
    QFile file("output_2.txt");
    if (!file.open(QIODevice::ReadOnly)) {
        qWarning() << "Failed to open file:";
        file.close();
        return;
    }

    QByteArray recvdata = file.readAll(); // 读取文件中的数据
    file.close();

    qDebug() << "read file data size:" << recvdata.size();
#endif

    qDebug() << "---Received  data size:" << recvData.size();

    // 将接收到的数据追加到buffer
    buffer->append(recvData);

    while (buffer->size() >= 11) { // 至少需要11个字节来解析数据头
        // 检查数据头
        if (buffer->mid(0, 4) == QByteArray::fromHex("aa55aa55")) {
            msg_id = static_cast<unsigned char>(buffer->at(4));
            int dataSize = (static_cast<unsigned char>(buffer->at(9)) << 24) |
                           (static_cast<unsigned char>(buffer->at(8)) << 16) |
                           (static_cast<unsigned char>(buffer->at(7)) << 8)  |
                           (static_cast<unsigned char>(buffer->at(6)));
            // 第11字节为返回 OK/NG
            bool success = (static_cast<unsigned char>(buffer->at(10)) == 0x00);
            //int totalSize = 10 + dataSize + 1; // 数据头大小(10字节) + success + 实际数据
            int totalSize = 10 + dataSize;     // 数据头大小(10字节) + 实际数据大小

            if (buffer->size() >= totalSize) {
                // 去掉前面 11 字节
                //QByteArray data        = buffer->mid(11, dataSize);
                QByteArray data        = buffer->mid(10, dataSize);
                QString    hexString   = QString::fromUtf8(data.toHex().data());
                QByteArray actual_data = hexStringToByteArray(hexString);
                buffer->remove(0, totalSize); // 移除已处理的数据
                // 暂时设置 NG
                // 同一个client仅当 msg_id 不连续为 0x11/0x21 或第一次处理时才执行 emit statusUpdated
                if ((msg_id != 0x11 || clientLastMsgId.value(client, 0) != 0x11) &&
                    (msg_id != 0x21 || clientLastMsgId.value(client, 0) != 0x21)){
                    qDebug() << "Emitting statusUpdated for client:" << client << "with msg_id:" << msg_id;
                    emit statusUpdated(client, currentRecvItemIndex + 1, currentRecvFuncItemIndex + 1,
                                       true, itemData, funcItemData);
                }               
                clientLastMsgId[client] = msg_id; 
                handleCmd(msg_id, client, actual_data);              
            }
            else {
                break; // 数据还不完整，等待下一次接收
            }
        }
        else {
            buffer->remove(0, 1); // 移除无效数据头
        }
    }
}