/*******************************************************************************
 * gui/HelpDialog.cpp                                                          *
 *                                                                             *
 * Copyright (C) 2006 Crypton         <retroshare.project@gmail.com>           *
 *                                                                             *
 * This program is free software: you can redistribute it and/or modify        *
 * it under the terms of the GNU Affero General Public License as              *
 * published by the Free Software Foundation, either version 3 of the          *
 * License, or (at your option) any later version.                             *
 *                                                                             *
 * This program is distributed in the hope that it will be useful,             *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of              *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                *
 * GNU Affero General Public License for more details.                         *
 *                                                                             *
 * You should have received a copy of the GNU Affero General Public License    *
 * along with this program. If not, see <https://www.gnu.org/licenses/>.       *
 *                                                                             *
 *******************************************************************************/

#include "HelpDialog.h"
#include "ui_HelpDialog.h"

#include <retroshare/rsiface.h>
#include <retroshare/rsplugin.h>
#include "rshare.h"

#ifdef ENABLE_WEBUI
#include <microhttpd.h>
#endif // ENABLE_WEBUI

#include <QFile>
#include <QTextStream>

static void addLibraries(QGridLayout *layout, const std::string &name, const std::list<RsLibraryInfo> &libraries)
{
	int row = layout->rowCount();

	QLabel *label = new QLabel(QString::fromUtf8(name.c_str()));
	label->setTextInteractionFlags(label->textInteractionFlags() | Qt::TextSelectableByMouse | Qt::TextSelectableByKeyboard);
	layout->addWidget(label, row++, 0, 1, 3);

	QFont font = label->font();
	font.setBold(true);
	label->setFont(font);

	std::list<RsLibraryInfo>::const_iterator libraryIt;
	for (libraryIt = libraries.begin(); libraryIt != libraries.end(); ++libraryIt) {
		label = new QLabel(QString::fromUtf8(libraryIt->mName.c_str()));
		label->setTextInteractionFlags(label->textInteractionFlags() | Qt::TextSelectableByMouse | Qt::TextSelectableByKeyboard);
		layout->addWidget(label, row, 0);
		label->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Preferred);

		label = new QLabel(QString::fromUtf8(libraryIt->mVersion.c_str()));
		label->setTextInteractionFlags(label->textInteractionFlags() | Qt::TextSelectableByMouse | Qt::TextSelectableByKeyboard);
		layout->addWidget(label, row++, 1);
	}
}

/** Constructor */
HelpDialog::HelpDialog(QWidget *parent) :
    QDialog(parent, Qt::WindowSystemMenuHint | Qt::WindowTitleHint | Qt::WindowCloseButtonHint),
    ui(new(Ui::HelpDialog))
{
	/* Invoke the Qt Designer generated object setup routine */
	ui->setupUi(this);

	//QFile licenseFile(QLatin1String(":/images/COPYING"));
	QFile licenseFile(QLatin1String(":/help/licence.html"));
	if (licenseFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
		QTextStream in(&licenseFile);
		ui->license->setHtml(in.readAll());
	}

	QFile authorsFile(QLatin1String(":/help/authors.html"));
	if (authorsFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
		QTextStream in(&authorsFile);
		ui->authors->setHtml(in.readAll());
	}

	QFile thanksFile(QLatin1String(":/help/thanks.html"));
	if (thanksFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
		QTextStream in(&thanksFile);
		ui->thanks->setHtml(in.readAll());
	}

	ui->version->setText(Rshare::retroshareVersion(true));

	/* Add version numbers of libretroshare */
	std::list<RsLibraryInfo> libraries;
	RsControl::instance()->getLibraries(libraries);
	addLibraries(ui->libraryLayout, "libretroshare", libraries);

#ifdef ENABLE_WEBUI
	/* Add version numbers of RetroShare */
	// Add versions here. Find a better place.
	libraries.clear();
	libraries.push_back(RsLibraryInfo("Libmicrohttpd", MHD_get_version()));
	addLibraries(ui->libraryLayout, "RetroShare", libraries);
#endif // ENABLE_WEBUI

	/* Add version numbers of plugins */
	if (rsPlugins) {
		for (int i = 0; i < rsPlugins->nbPlugins(); ++i) {
			RsPlugin *plugin = rsPlugins->plugin(i);
			if (plugin) {
				libraries.clear();
				plugin->getLibraries(libraries);
				addLibraries(ui->libraryLayout, plugin->getPluginName(), libraries);
			}
		}
	}
}

HelpDialog::~HelpDialog()
{
	delete(ui);
}