#include "Widget.h"
#include "Channel.h"
#include "Config.h"
#include "TcpServer.h"
#include "ui_Widget.h"
#include <QDebug>
#include <QDir>
#include <QScrollBar>

extern char* VideoPath;
extern QList<Channel*> channelList;

extern Widget::Widget(QWidget* parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);

    menu = new Menu(this);
    menu->hide();

    progressBar = new ProgressBar(this);
    progressBar->hide();

    // set window background transparent
    QPalette pal = palette();
    pal.setBrush(QPalette::Base, Qt::transparent);
    setPalette(pal);
    setAttribute(Qt::WA_TranslucentBackground, true);

    // set list no scroll bar
    ui->listWidget->horizontalScrollBar()->hide();
    ui->listWidget->verticalScrollBar()->hide();
    ui->listWidget->hide();

    // serial port
    initSerialPort();

    // init command map
    initCommandMap();

    // get playback position each 0.5s
    progressTimer = new QTimer();
    progressTimer->setInterval(500);
    connect(progressTimer, SIGNAL(timeout()), this, SLOT(onProgressTimeout()));

    for (Channel* chn : channelList) {
        connect(chn, SIGNAL(playEnd()), this, SLOT(onPlayEnd()));
        connect(chn, SIGNAL(signalInputed(QString, int, int)), this, SLOT(onSignalInputed(QString, int, int)));
    }
}

Widget::~Widget()
{
    serialPort->close();
    delete ui;
}

/**
 * @brief open serial port and link the signals and slots
 */
void Widget::initSerialPort()
{
    // timer used to reopen serial port
    timer = new QTimer();
    timer->setInterval(3000);
    timer->stop();

    // serialport
    serialPort = new QSerialPort();
    serialPort->setPortName("ttyAMA2");
    serialPort->setBaudRate(QSerialPort::Baud115200);
    serialPort->setDataBits(QSerialPort::Data8);
    serialPort->setParity(QSerialPort::NoParity);
    serialPort->setStopBits(QSerialPort::OneStop);
    serialPort->setFlowControl(QSerialPort::NoFlowControl);
    if (serialPort->open(QIODevice::ReadWrite)) {
        qDebug() << "open serial port: /dev/ttyAMA2 success";
    } else {
        qDebug() << "open serial port: /dev/ttyAMA2 failed, ready to retry...";
        timer->start();
    }
    connect(serialPort, SIGNAL(error(QSerialPort::SerialPortError)), this, SLOT(onSerialError(QSerialPort::SerialPortError)));
    connect(serialPort, SIGNAL(readyRead()), this, SLOT(onReadyRead()));
}

/**
 * @brief get the video list of current channel, and show
 */
void Widget::showPlayList()
{
    // find the videos in dictionary "/root/usb/video"
    QString dirPath = QString("%1/%2").arg(VideoPath).arg(curSelectChannel);
    QStringList files = this->getFileList(dirPath);

    ui->listWidget->clear();
    // append fileList to qlistwidget and show
    for (QString& file : files) {
        QListWidgetItem* item = new QListWidgetItem(file);
        ui->listWidget->addItem(item);
    }
    ui->listWidget->show();
    ui->listWidget->setCurrentRow(0);
}

/**
 * @brief try to reopen serial port
 */
void Widget::onTimeout()
{
    timer->stop();
    bool ret = serialPort->open(QIODevice::ReadWrite);
    // if open failed, then start timer and reopen
    if (!ret) {
        qDebug() << "reopen serial port: /dev/ttyAMA2 success";
        timer->start();
    } else {
        qDebug() << "reopen serial port: /dev/ttyAMA2 failed, ready to retry...";
    }
}

void Widget::onProgressTimeout()
{
    Channel* chn = Config::findChannelByName(curSelectChannel);
    int pos = chn->file->invoke("getPosition").toInt() / 1000;
    progressBar->setCurrent(pos);
}

/**
 * @brief call it when input hdmi signal
 * @param name
 * @param width
 * @param height
 */
void Widget::onSignalInputed(QString name, int width, int height)
{
    if (name == "HDMI-A") {
        this->setFixedSize(QSize(width, height));
        qDebug() << QString("set windows size: %1x%2").arg(width).arg(height);
    }
}

/**
 * @brief handling error
 * @param error
 */
void Widget::onSerialError(QSerialPort::SerialPortError error)
{
    if (error == QSerialPort::ResourceError) {
        qDebug() << "serial port break, try to reopen";
        serialPort->close();
        timer->start();
    }
}

/**
 * @brief map command from string to int
 */
void Widget::initCommandMap()
{
    commandMap.insert("A1", Playback);
    commandMap.insert("A2", Next);
    commandMap.insert("A3", Previous);
    commandMap.insert("A4", Forward);
    commandMap.insert("A5", Back);
    commandMap.insert("A6", Pause);
    commandMap.insert("A7", Return);
    commandMap.insert("A8", Enter);
}

/**
 * @brief receive data from serial port, and handle it
 */
void Widget::onReadyRead()
{
    serialPort->waitForReadyRead(100);
    QString data = serialPort->readLine();
    if (!commandMap.contains(data)) {
        qDebug() << QString("receive unkown command %1 from serial port: /dev/ttyAMA2").arg(data);
        return;
    }
    Command cmd = commandMap.value(data);
    switch (cmd) {
    case Playback: {
        if (menu->isVisible())
            return;
        menu->show();
    }
    case Previous: {
        // if show menu, then switch menu select
        if (menu->isVisible()) {
            menu->setCurChannel("HDMI-A");
        }
        // if menu hide, then select previous of listwidget
        else {
            int curRow = ui->listWidget->currentRow();
            if (curRow == 0)
                curRow = ui->listWidget->count();
            ui->listWidget->setCurrentRow(curRow - 1);
        }
        break;
    }
    case Next: {
        if (menu->isVisible()) {
            menu->setCurChannel("HDMI-B");
        } else {
            int curRow = ui->listWidget->currentRow();
            if (curRow == ui->listWidget->count() - 1) {
                curRow = -1;
            }
            ui->listWidget->setCurrentRow(curRow + 1);
        }
        break;
    }
    case Forward:
        if (isPlayback) {
            Channel* chn = Config::findChannelByName(curSelectChannel);
            chn->forward();
            progressBar->showMax();
        }
        break;
    case Back:
        if (isPlayback) {
            Channel* chn = Config::findChannelByName(curSelectChannel);
            chn->back();
            progressBar->showMax();
        }
        break;
    case Pause:
        if (isPlayback) {
            Channel* chn = Config::findChannelByName(curSelectChannel);
            chn->togglePause();
            progressBar->showMax();
            if (chn->isPause) {
                progressBar->setState(ProgressBar::Pause);
            } else {
                progressBar->setState(ProgressBar::Play);
            }
        }
        break;
    case Enter:
        // if menu show, then hide menu and show play list
        if (menu->isVisible()) {
            curSelectChannel = menu->getCurChannel();
            menu->hide();
            showPlayList();
        } else {
            // if list widget show, then current channel playback and other channel play live
            if (ui->listWidget->isVisible()) {
                if (ui->listWidget->count() == 0)
                    return;
                QString fileName = ui->listWidget->currentItem()->text();
                Channel* channel = nullptr;
                for (int i = 0; i < channelList.count(); i++) {
                    if (channelList.at(i)->channelName == curSelectChannel) {
                        channel = channelList.at(i);
                    }
                    if (channelList.at(i)->isPlayback) {
                        channelList.at(i)->startPlayLive();
                    }
                }
                if (channel) {
                    // play back and output hdmi
                    channel->startPlayback(fileName);
                    isPlayback = true;

                    // only show progressbar in HDMI-A(HDMI-OUT0)
                    if (channel->channelName == "HDMI-A") {
                        // show progress bar maximize
                        int duration = channel->getDuration(fileName) / 1000;
                        progressBar->setDuration(duration);
                        progressBar->setCurrent(0);
                        progressBar->show();
                        progressBar->showMax();
                        progressBar->setState(ProgressBar::Play);
                        // if timer is active, then restart timer
                        if (progressTimer->isActive()) {
                            progressTimer->stop();
                            progressTimer->start();
                        } else {
                            progressTimer->start();
                        }
                        curPlayChannel = curSelectChannel;
                        curFileName = fileName;
                        QString dirPath = QString("%1/%2").arg(VideoPath).arg(curPlayChannel);
                        fileList = this->getFileList(dirPath);
                    }
                }
                //                ui->listWidget->hide();
            }
        }
        break;
    case Return:
        if (menu->isVisible()) {
            menu->hide();
        }
        if (isPlayback && !ui->listWidget->isVisible()) {
            Channel* chn = Config::findChannelByName(curSelectChannel);
            chn->startPlayLive();
            progressBar->hide();
        } else {
            ui->listWidget->hide();
        }
        break;
    default:
        break;
    }
}

/**
 * @brief current play end and then play next video
 */
void Widget::onPlayEnd()
{
    int index = fileList.indexOf(curFileName);
    // cur video is last one of list, then refresh list
    if (index == fileList.length() - 1) {
        QString dirPath = QString("%1/%2").arg(VideoPath).arg(curPlayChannel);
        this->getFileList(dirPath);
        if (index == fileList.length() - 1) {
            qDebug() << "no file to play";
            return;
        }
        qDebug() << "refresh current play file list";
    }

    curFileName = fileList.at(index + 1);
    Channel* chn = Config::findChannelByName(curPlayChannel);
    if (chn)
        chn->startPlayback(curFileName);
}