#include "mainwindow.h"
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QGridLayout>
#include <QFileDialog>
#include <QScrollArea>
#include <QFrame>
#include <QGroupBox>
#include <QMessageBox>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , m_updatingSeek(false)
{
    setWindowTitle("Zero-Copy CUDA-GL Video Player");
    resize(960, 600);

    m_glWidget = new GLWidget(this);
    m_videoDecoder = new VideoDecoder(this);
    m_glWidget->setVideoDecoder(m_videoDecoder);

    setupUI();

    // Conectar las señales de posición y finalización del hilo descodificador
    connect(m_videoDecoder, &VideoDecoder::positionChanged, this, &MainWindow::onPositionChanged);
    connect(m_videoDecoder, &VideoDecoder::playbackFinished, this, &MainWindow::onPlaybackFinished);
}

MainWindow::~MainWindow() {
    m_videoDecoder->stopThread();
}

void MainWindow::setupUI() {
    // Aplicar hoja de estilos (QSS) para un look oscuro premium y retro-futurista
    this->setStyleSheet(
        "QMainWindow { background-color: #08080f; }"
        "QWidget { color: #f0f0f5; font-family: 'Outfit', 'Segoe UI', sans-serif; font-size: 13px; }"
        "QPushButton { background-color: #ff007f; color: white; border: none; padding: 8px 15px; border-radius: 6px; font-weight: bold; min-width: 60px; }"
        "QPushButton:hover { background-color: #ff3399; }"
        "QPushButton:pressed { background-color: #cc0066; }"
        "QPushButton:disabled { background-color: #444; color: #888; }"
        "QSlider::groove:horizontal { border: 1px solid #2d2d44; height: 6px; background: #1a1a2e; border-radius: 3px; }"
        "QSlider::sub-page:horizontal { background: #ff007f; border-radius: 3px; }"
        "QSlider::handle:horizontal { background: #ffffff; border: 1px solid #ff007f; width: 14px; height: 14px; margin: -4px 0; border-radius: 7px; }"
        "QSlider::handle:horizontal:hover { background: #ff007f; }"
        "QLabel { color: #a0a0c0; }"
    );

    QWidget *centralWidget = new QWidget(this);
    setCentralWidget(centralWidget);

    QVBoxLayout *mainLayout = new QVBoxLayout(centralWidget);
    mainLayout->setContentsMargins(10, 10, 10, 10);
    mainLayout->setSpacing(10);

    mainLayout->addWidget(m_glWidget, 1);

    // Controles Multimedia
    QHBoxLayout *controlsLayout = new QHBoxLayout();
    
    QPushButton *openBtn = new QPushButton("Abrir Video", this);
    openBtn->setStyleSheet("background-color: #00bfff;");
    connect(openBtn, &QPushButton::clicked, this, &MainWindow::openVideoFile);
    controlsLayout->addWidget(openBtn);

    m_playBtn = new QPushButton("▶", this);
    connect(m_playBtn, &QPushButton::clicked, this, &MainWindow::togglePlayPause);
    controlsLayout->addWidget(m_playBtn);

    m_muteBtn = new QPushButton("🔊", this);
    m_muteBtn->setStyleSheet("background-color: #4a4e69;");
    connect(m_muteBtn, &QPushButton::clicked, this, &MainWindow::toggleMute);
    controlsLayout->addWidget(m_muteBtn);

    m_seekBar = new QSlider(Qt::Horizontal, this);
    m_seekBar->setRange(0, 1000);
    m_seekBar->setEnabled(false);
    connect(m_seekBar, &QSlider::sliderMoved, this, &MainWindow::setVideoPosition);
    controlsLayout->addWidget(m_seekBar, 1);

    m_timeLabel = new QLabel("00:00 / 00:00", this);
    m_timeLabel->setMinimumWidth(90);
    m_timeLabel->setAlignment(Qt::AlignCenter);
    controlsLayout->addWidget(m_timeLabel);

    mainLayout->addLayout(controlsLayout);
}

void MainWindow::openVideoFile() {
    QString fileName = QFileDialog::getOpenFileName(this, "Abrir archivo de video", "", "Videos (*.mp4 *.avi *.mkv *.webm *.mov)");
    if (!fileName.isEmpty()) {
        openVideoFileDirect(fileName);
    }
}

void MainWindow::openVideoFileDirect(const QString &fileName) {
    m_glWidget->clearVideo();
    m_videoDecoder->stopThread();
    
    if (m_videoDecoder->openFile(fileName)) {
        m_seekBar->setEnabled(m_videoDecoder->getDuration() > 0.0);
        m_playBtn->setText("⏸");
        m_videoDecoder->start(); // Arranca el hilo de decodificación
        m_videoDecoder->play();  // Inicia la reproducción
    }
}

void MainWindow::togglePlayPause() {
    if (m_videoDecoder->isPaused()) {
        m_videoDecoder->play();
        m_playBtn->setText("⏸");
    } else {
        m_videoDecoder->pause();
        m_playBtn->setText("▶");
    }
}

void MainWindow::toggleMute() {
    static bool muted = false;
    muted = !muted;
    m_muteBtn->setText(muted ? "🔇" : "🔊");
}

void MainWindow::setVideoPosition(int position) {
    if (m_videoDecoder->getDuration() > 0.0) {
        m_updatingSeek = true;
        double targetSecs = (static_cast<double>(position) / 1000.0) * m_videoDecoder->getDuration();
        m_videoDecoder->seek(targetSecs);
        m_updatingSeek = false;
    }
}

void MainWindow::onPositionChanged(qint64 positionMs) {
    double durationSecs = m_videoDecoder->getDuration();
    if (durationSecs > 0.0 && !m_updatingSeek) {
        m_updatingSeek = true;
        double progress = static_cast<double>(positionMs) / (durationSecs * 1000.0);
        m_seekBar->setValue(static_cast<int>(progress * 1000.0));
        m_updatingSeek = false;
    }

    // Formatear tiempos
    auto format = [](qint64 ms) -> QString {
        qint64 totalSecs = ms / 1000;
        int mins = totalSecs / 60;
        int secs = totalSecs % 60;
        return QString("%1:%2").arg(mins, 2, 10, QChar('0')).arg(secs, 2, 10, QChar('0'));
    };
    m_timeLabel->setText(format(positionMs) + " / " + format(static_cast<qint64>(durationSecs * 1000.0)));
}

void MainWindow::onPlaybackFinished() {
    m_playBtn->setText("▶");
    m_seekBar->setValue(0);
}