#include <QImage>
#include <QPainter>
#include <QResizeEvent>
#include <QTimer>

#include "Sheet.h"
#include "VisualizationWiew.h"

VisualizationWiew::VisualizationWiew(QWidget *parent)
	: QWidget(parent)
{
	this->refreshTimer = new QTimer(this);
	this->refreshTimer->setInterval(1000);
	this->connect( this->refreshTimer, SIGNAL(timeout()), this, SLOT(update()) );
	this->connect( this->refreshTimer, &QTimer::timeout, this, &VisualizationWiew::refreshed );
}

void VisualizationWiew::paintEvent(QPaintEvent* event)
{
	// Adapted from https://www.youtube.com/watch?v=yz7cMHKbZSc
	QWidget::paintEvent(event);
	printf("paint rect(%d,%d %d,%d)\n"
		, event->rect().x(), event->rect().y()
		, event->rect().width(), event->rect().height() );
	fflush(stdout);


	// Fill an image sampling from the data source
	QImage image( size(), QImage::Format_ARGB32_Premultiplied );

	// If there is a data source
	if ( this->sheet )
	{
		// Get an image representing the temperatures of the sheet
		this->sheet->fillImage(image);
	}

	// Paint the image into this widget
	QPainter painter(this);
	painter.drawImage(0, 0, image);
}

void VisualizationWiew::setRefreshRateText(const QString& millisecondsText)
{
	// Convert the given text to an int
	bool ok = true;
	int milliseconds = millisecondsText.toInt(&ok);

	// If the text is a number, set is as the refresh rate
	if ( ok )
		this->setRefreshRate(milliseconds);
}

void VisualizationWiew::setRefreshRate(int milliseconds)
{
	if ( milliseconds >= 0 )
		this->refreshTimer->setInterval(milliseconds);
}

void VisualizationWiew::setSheet(Sheet* sheet)
{
	this->sheet = sheet;
	this->repaint();
}

void VisualizationWiew::start(double epsilon)
{
	Q_ASSERT(this->sheet);

	this->refreshTimer->start();
	this->sheet->startSimulation(epsilon);
}

void VisualizationWiew::stop()
{
	this->refreshTimer->stop();
	this->sheet->stopSimulation();
}