#include "ParkingLotWidget.h"

#include <QFile>
#include <QMessageBox>
#include <QDomDocument>
#include <QDebug>
#include "Road.h"
#include "ParkingSpaceInfo.h"
#include <QPainter>

ParkingLotWidget::ParkingLotWidget(QWidget *parent, const QString& xml) : QWidget(parent)
{
	resize(1000, 1000);
	parse_xml(xml);
	if (rootLayoutDirection == horizontal)
		setLayout(hBoxLayout);
	else
		setLayout(vBoxLayout);

}


void ParkingLotWidget::paintEvent(QPaintEvent * event)
{
	
}

ParkingLotWidget::~ParkingLotWidget()
{
}

void ParkingLotWidget::parse_xml(const QString & xml)
{
	QFile file(xml);
	if (!file.open(QFile::ReadOnly | QFile::Text)) {
		QMessageBox::critical(this, QObject::tr("Error"),
			QObject::tr("Cannot read file %1").arg(xml));
	}

	QString errorStr;
	int errorLine;
	int errorColumn;
	QDomDocument doc;
	if (!doc.setContent(&file, false, &errorStr, &errorLine, &errorColumn)) {
		QMessageBox::critical(this, QObject::tr("Error"),
			QObject::tr("Parse error at line %1, column %2: %3")
			.arg(errorLine).arg(errorColumn).arg(errorStr));
	}
	QDomElement element = doc.documentElement().firstChild().toElement();
	QString name = element.tagName();
	if (element.tagName() == "vLayout")
	{
		rootLayoutDirection = vertical;
		vBoxLayout = parseVbox(element);
	} else if (element.tagName() == "hLayout")
	{
		rootLayoutDirection = horizontal;
		hBoxLayout = parseHbox(element);
	} else
	{
		qDebug() << this -> objectName() << "布局文件错误";
	}
}

inline QHBoxLayout * ParkingLotWidget::parseHbox(const QDomElement & element)
{
	return static_cast<QHBoxLayout*>(parseLayout(element));
}

inline QVBoxLayout * ParkingLotWidget::parseVbox(const QDomElement & element)
{
	return static_cast<QVBoxLayout*>(parseLayout(element));;
}

QBoxLayout * ParkingLotWidget::parseLayout(const QDomElement & element)
{
	QBoxLayout* layout;
	if (element.tagName() == "hLayout")
		layout = new QHBoxLayout;
	else
		layout = new QVBoxLayout;
	
	QDomElement child = element.firstChild().toElement();
	while (!child.isNull())
	{
		QString name = child.tagName();
		if (name == "road")
		{
			const int l = child.attribute("length").toInt();
			if (child.attribute("direction") == "vertical")
				layout->addWidget(new Road(this, l, Road::vertical));
			else
				layout->addWidget(new Road(this, l, Road::horizontal));
		}
		else if (name == "room")
		{
			const auto n = child.attribute("number", "1").toInt();
			layout->addLayout(ParkingSpaceInfo::makeParkingSapceGroup(
				this, child.attribute("direction"), n, child.attribute("expendDirection")));
		}
		else if ((name.at(0) == 'v' ||  name.at(0) == 'h' )&& name.contains("Layout"))
			layout->addLayout(parseHbox(child));
		else
			qDebug() << this->objectName() << "错误的xml标签";
		child = child.nextSiblingElement();
	}
	layout->setMargin(0);
	layout->setSpacing(0);
	layout->setContentsMargins(0, 0, 0, 0);
	return layout;
}