/*
 * GStreamer Camera Viewer
 * Copyright (c) 2025 Maik Jurischka
 * Licensed under CC BY-NC-SA 4.0
 * https://creativecommons.org/licenses/by-nc-sa/4.0/
 */

#include "aboutwidget.h"
#include <QVBoxLayout>
#include <QGroupBox>
#include <QLabel>
#include <gst/gst.h>

AboutWidget::AboutWidget(QWidget *parent)
    : QWidget(parent)
{
    setupUI();
}

void AboutWidget::setupUI()
{
    auto* mainLayout = new QVBoxLayout(this);

    auto* aboutGroup = new QGroupBox("About GStreamer Camera Viewer", this);
    auto* aboutLayout = new QVBoxLayout();

    auto* titleLabel = new QLabel("<h2>GStreamer Camera Viewer</h2>", this);
    aboutLayout->addWidget(titleLabel);

    auto* versionLabel = new QLabel("<b>Version:</b> 0.5.0", this);
    aboutLayout->addWidget(versionLabel);

    auto* authorLabel = new QLabel("<b>Author:</b> Maik Jurischka", this);
    aboutLayout->addWidget(authorLabel);

    auto* descLabel = new QLabel(
        "<p>A Qt6-based camera viewer application with GStreamer pipeline control.</p>"
        "<p>Features:</p>"
        "<ul>"
        "<li>Real-time video streaming with embedded display</li>"
        "<li>Configurable GStreamer pipelines</li>"
        "<li>Camera parameter controls (exposure, white balance, etc.)</li>"
        "<li>Image transformation (rotation, flip)</li>"
        "<li>Zoom support (50-200%)</li>"
        "</ul>", this);
    descLabel->setWordWrap(true);
    aboutLayout->addWidget(descLabel);

    auto* licenseGroup = new QGroupBox("License", this);
    auto* licenseLayout = new QVBoxLayout();

    auto* licenseLabel = new QLabel(
        "<b>CC BY-NC-SA 4.0</b>"
        "<p>Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International</p>"
        "<p style='font-size: small;'>"
        "This software is free to use, share, and modify for non-commercial purposes. "
        "Any derivative works must be shared under the same license."
        "</p>"
        "<p style='font-size: small;'>"
        "<a href='https://creativecommons.org/licenses/by-nc-sa/4.0/'>License Details</a>"
        "</p>", this);
    licenseLabel->setWordWrap(true);
    licenseLabel->setOpenExternalLinks(true);
    licenseLayout->addWidget(licenseLabel);

    licenseGroup->setLayout(licenseLayout);
    aboutLayout->addWidget(licenseGroup);

    auto* techGroup = new QGroupBox("Technologies", this);
    auto* techLayout = new QVBoxLayout();

    guint major, minor, micro, nano;
    gst_version(&major, &minor, &micro, &nano);
    QString gstVersion = QString("GStreamer %1.%2.%3").arg(major).arg(minor).arg(micro);

    auto* qtLabel = new QLabel(QString("<b>Qt Version:</b> %1").arg(QT_VERSION_STR), this);
    techLayout->addWidget(qtLabel);

    auto* gstLabel = new QLabel(QString("<b>%1</b>").arg(gstVersion), this);
    techLayout->addWidget(gstLabel);

    techGroup->setLayout(techLayout);
    aboutLayout->addWidget(techGroup);

    aboutLayout->addStretch();

    aboutGroup->setLayout(aboutLayout);
    aboutGroup->setMaximumWidth(500);

    mainLayout->addWidget(aboutGroup);
    mainLayout->addStretch();

    setLayout(mainLayout);
}