#include "blobshape2.hpp"
#include "blobgroup2.hpp"

#include <algorithm>
#include <cmath>

BlobShape2::BlobShape2(QQuickItem* parent) : QQuickItem(parent) {}

void BlobShape2::setGroup(BlobGroup2* g) {
	if (m_group == g) return;
	if (m_group && isComponentComplete()) unregisterFromGroup();
	m_group = g;
	if (m_group && isComponentComplete()) registerWithGroup();
	emit groupChanged();
	if (m_group) m_group->markDirty();
}

void BlobShape2::setRadius(qreal r) {
	if (qFuzzyCompare(m_radius, r)) return;
	m_radius = r;
	emit radiusChanged();
	if (m_group) m_group->markDirty();
}

void BlobShape2::componentComplete() {
	QQuickItem::componentComplete();
	if (m_group) registerWithGroup();
}

void BlobShape2::geometryChange(
	const QRectF& newGeometry, const QRectF& oldGeometry) {
	QQuickItem::geometryChange(newGeometry, oldGeometry);
	updateCenteredDeformMatrix();

	// One draw covers the whole group, so any shape change is a group change.
	if (m_group) m_group->markDirty();
}

void BlobShape2::updateCenteredDeformMatrix() {
	const auto cx = static_cast<float>(width()) * 0.5f;
	const auto cy = static_cast<float>(height()) * 0.5f;
	QMatrix4x4 result;
	result.translate(cx, cy);
	result *= m_deformMatrix;
	result.translate(-cx, -cy);
	if (m_centeredDeformMatrix != result) {
		m_centeredDeformMatrix = result;
		emit deformMatrixChanged();
	}
}

void BlobShape2::cornerRadii(float out[4]) const {
	const auto maxR = static_cast<float>(std::min(width(), height())) * 0.5f;
	const auto r = std::min(static_cast<float>(m_radius), maxR);
	out[0] = r;
	out[1] = r;
	out[2] = r;
	out[3] = r;
}

void BlobShape2::registerWithGroup() {
	if (m_group) m_group->addShape(this);
}

void BlobShape2::unregisterFromGroup() {
	if (m_group) m_group->removeShape(this);
}