#include "helpwindow.h"

#include <QPushButton>
#include <QGridLayout>
#include <QAction>
#include <QLabel>
#include <QDebug>
#include <QApplication>
#include <QScreen>

#define ICON_SIZE (50)
#define ICON_SIZE_SMALL (32)

HelpWindow::HelpWindow(const QList<QAction*> &actions, QWidget *parent) :
	QDialog(parent)
{
	setWindowTitle(tr("Help"));
	int iconSize = ICON_SIZE;
	for (auto screen : qApp->screens()) {
		if (screen->geometry().height() < 900) {
			iconSize = ICON_SIZE_SMALL;
			break;
		}
	}
	QGridLayout *layout = new QGridLayout(this);
	layout->setSpacing(2);
	QSizePolicy sizePol(QSizePolicy::Minimum, QSizePolicy::Preferred);
	QList<QLabel*> wrapLabels;
	// Add help items
	int row = 0;
	for (QAction *action : actions) {
		if (action->icon().isNull() || action->text().isEmpty())
			continue;
		QLabel *icon = new QLabel(this);
		icon->setPixmap(action->icon().pixmap(iconSize, iconSize, QIcon::Normal, QIcon::Off));
		icon->setMinimumSize(iconSize + 5, iconSize + 2);
		layout->addWidget(icon, row, 0, 3, 1, Qt::AlignTop | Qt::AlignLeft);
		QLabel *headline = new QLabel(action->toolTip(), this);
		QFont boldFont = headline->font();
		boldFont.setBold(true);
		headline->setFont(boldFont);
		headline->setAlignment(Qt::AlignTop | Qt::AlignLeft);
		layout->addWidget(headline, row, 1, Qt::AlignTop);
		QLabel *description = new QLabel(action->text(), this);
		description->setWordWrap(true);
		description->setAlignment(Qt::AlignTop | Qt::AlignLeft);
		description->setSizePolicy(sizePol);
		wrapLabels.append(description);
		layout->addWidget(description, row + 1, 1, Qt::AlignTop);
		layout->setRowStretch(row + 2, 1);
		QFrame *line = new QFrame();
		line->setFrameShape(QFrame::HLine);
		line->setFrameShadow(QFrame::Sunken);
		layout->addWidget(line, row + 3, 0, 1, 2);
		row += 4;
	}
	layout->setColumnStretch(1, 1);
	// Add close button
	layout->setRowStretch(row++, 1000);
	QPushButton *close = new QPushButton(tr("Close"), this);
	QFont bigFont = close->font();
	bigFont.setPointSize(20);
	close->setFont(bigFont);
	close->setDefault(true);
	connect(close, SIGNAL(clicked()), this, SLOT(hide()));
	layout->addWidget(close, row++, 0, 1, 2);
	this->setFixedWidth(600);
	this->setSizePolicy(sizePol);
}