#include "pageinstall.h"

#include <QtDebug>

#include <QBoxLayout>
#include <QLabel>
#include <QTextEdit>
#include <QProgressBar>

PageInstall::PageInstall(const QString& title, InstallerSettings* settings) :
	InstallerPage(title),
	m_Settings(settings),
	m_clProc(0)
{
	//QLabel*	label = new QLabel( tr("") )

	m_Output = new QTextEdit;
	m_Output->setReadOnly(true);

	m_LabelEta = new QLabel( tr("Eta: unknown") );
	m_Progress = new QProgressBar(0);

	QHBoxLayout*	hbox = new QHBoxLayout;
	hbox->addWidget(m_LabelEta);
	hbox->addWidget(m_Progress);

	QVBoxLayout*	vbox = new QVBoxLayout;

	vbox->addWidget(m_Output);
	vbox->addLayout(hbox);

	m_Widget->setLayout(vbox);
}

void PageInstall::show()
{
	emit changeNext(false);
	emit changePrev(false);

	qDebug() << "install show()";

	emit	changeNext(false);
	emit	changePrev(false);

	if ( !m_clProc )
	{
		m_clProc = new QProcess(this);

		connect( m_clProc, SIGNAL(error(QProcess::ProcessError)), this, SLOT(onError(QProcess::ProcessError)) );
		connect( m_clProc, SIGNAL(readyReadStandardOutput()), this, SLOT(showStdOut()) );
		connect( m_clProc, SIGNAL(readyReadStandardError()), this, SLOT(showStdErr()) );
		connect( m_clProc, SIGNAL(finished(int,QProcess::ExitStatus)), this, SLOT(onFinish(int,QProcess::ExitStatus)) );

		QStringList	args;
		args << QString("--disk=%1").arg(m_Settings->disk);
		args << QString("--set-hostname=%1").arg(m_Settings->host);
		args << QString("--set-format=%1").arg(m_Settings->fs);
		args << QString("--set-lang=%1").arg(m_Settings->language);
		args << QString("--set-timezone=%1").arg(m_Settings->timezone);

		m_clProc->start("calculate", args);
	}
}

bool PageInstall::validate()
{
	return true;
}

void PageInstall::onError(QProcess::ProcessError error)
{
	qDebug() << "failed to run process 'calculate' error=" << error ;
	onFinish(-error);
}

void PageInstall::showStdOut()
{
	if (m_clProc)
	{
		// debug
		QString str = m_clProc->readAllStandardOutput();

		// TODO: parse out
		m_Output->insertPlainText( str );
	}
}

void PageInstall::showStdErr()
{
	QString	eta;
	QString progress;

	if (m_clProc)
	{
		QString str = m_clProc->readAllStandardError();

		if ( str.contains("eta:") )
		{
			QRegExp eta_regexp("\\b(\\d{1,2}:\\d{1,2}:\\d{1,2})\\b");
			QRegExp percent_regexp("\\d{1,2}.%");

			if ( eta_regexp.indexIn(str) )
				eta = eta_regexp.cap(0);

			if ( percent_regexp.indexIn(str) )
				progress = percent_regexp.cap(0);

			if ( !eta.isEmpty() )
				m_LabelEta->setText( tr("Eta: %1").arg(eta) );

			if ( !progress.isEmpty() )
				m_Progress->setValue( progress.toInt() );
		}
	}
}


void PageInstall::onFinish(int exitCode, QProcess::ExitStatus exitStatus)
{
	qDebug() << "install onFinish()";

	emit	changeNext(true);
	emit	changePrev(true);

	delete m_clProc;
	m_clProc = 0;
}