///////////////////////////////////////////////////////////////////////////////
// LameXP - Audio Encoder Front-End
// Copyright (C) 2004-2010 LoRd_MuldeR <MuldeR2@GMX.de>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// http://www.gnu.org/licenses/gpl-2.0.txt
///////////////////////////////////////////////////////////////////////////////

#include "Dialog_Processing.h"

#include "Global.h"
#include "Model_Progress.h"
#include "Thread_Process.h"

#include <QApplication>
#include <QRect>
#include <QDesktopWidget>
#include <QMovie>
#include <QMessageBox>
#include <QTimer>
#include <QCloseEvent>
#include <QDesktopServices>
#include <QUrl>
#include <Windows.h>

////////////////////////////////////////////////////////////
// Constructor
////////////////////////////////////////////////////////////

ProcessingDialog::ProcessingDialog(void)
{
	//Init the dialog, from the .ui file
	setupUi(this);
	setWindowFlags(windowFlags() ^ Qt::WindowContextHelpButtonHint);
	label_versionInfo->setText(QString().sprintf("v%d.%02d %s (Build %d)", lamexp_version_major(), lamexp_version_minor(), lamexp_version_release(), lamexp_version_build()));
	label_versionInfo->installEventFilter(this);

	//Center window in screen
	QRect desktopRect = QApplication::desktop()->screenGeometry();
	QRect thisRect = this->geometry();
	move((desktopRect.width() - thisRect.width()) / 2, (desktopRect.height() - thisRect.height()) / 2);
	setMinimumSize(thisRect.width(), thisRect.height());

	//Enable buttons
	connect(button_AbortProcess, SIGNAL(clicked()), this, SLOT(abortEncoding()));
	
	//Init progress indicator
	m_progressIndicator = new QMovie(":/images/Working.gif");
	label_headerWorking->setMovie(m_progressIndicator);
	progressBar->setRange(0, 4);
	progressBar->setValue(0);

	//Init progress model
	m_progressModel = new ProgressModel();
	view_log->setModel(m_progressModel);
	view_log->verticalHeader()->setResizeMode(QHeaderView::ResizeToContents);
	view_log->verticalHeader()->hide();
	view_log->horizontalHeader()->setResizeMode(QHeaderView::ResizeToContents);
	view_log->horizontalHeader()->setResizeMode(0, QHeaderView::Stretch);

	//Init member vars
	for(int i = 0; i < 4; i++) m_thread[i] = NULL;
}

////////////////////////////////////////////////////////////
// Destructor
////////////////////////////////////////////////////////////

ProcessingDialog::~ProcessingDialog(void)
{
	view_log->setModel(NULL);
	if(m_progressIndicator) m_progressIndicator->stop();
	LAMEXP_DELETE(m_progressIndicator);
	LAMEXP_DELETE(m_progressModel);
}

////////////////////////////////////////////////////////////
// EVENTS
////////////////////////////////////////////////////////////

void ProcessingDialog::showEvent(QShowEvent *event)
{
	setCloseButtonEnabled(false);
	button_closeDialog->setEnabled(false);
	button_AbortProcess->setEnabled(false);

	QTimer::singleShot(1000, this, SLOT(initEncoding()));
}

void ProcessingDialog::closeEvent(QCloseEvent *event)
{
	if(!button_closeDialog->isEnabled() || m_thread) event->ignore();
}

bool ProcessingDialog::eventFilter(QObject *obj, QEvent *event)
{
	static QColor defaultColor = QColor();

	if(obj == label_versionInfo)
	{
		if(event->type() == QEvent::Enter)
		{
			QPalette palette = label_versionInfo->palette();
			defaultColor = palette.color(QPalette::Normal, QPalette::WindowText);
			palette.setColor(QPalette::Normal, QPalette::WindowText, Qt::red);
			label_versionInfo->setPalette(palette);
		}
		else if(event->type() == QEvent::Leave)
		{
			QPalette palette = label_versionInfo->palette();
			palette.setColor(QPalette::Normal, QPalette::WindowText, defaultColor);
			label_versionInfo->setPalette(palette);
		}
		else if(event->type() == QEvent::MouseButtonPress)
		{
			QUrl url("http://mulder.dummwiedeutsch.de/");
			QDesktopServices::openUrl(url);
		}
	}

	return false;
}

////////////////////////////////////////////////////////////
// SLOTS
////////////////////////////////////////////////////////////

void ProcessingDialog::initEncoding(void)
{
	label_progress->setText("Encoding files, please wait...");
	m_progressIndicator->start();
	
	m_pendingJobs = 4;

	for(int i = 0; i < 4; i++)
	{
		m_thread[i] = new ProcessThread();
		connect(m_thread[i], SIGNAL(finished()), this, SLOT(doneEncoding()), Qt::QueuedConnection);
		connect(m_thread[i], SIGNAL(processStateInitialized(QString,QString,QString,int)), m_progressModel, SLOT(addJob(QString,QString,QString,int)), Qt::QueuedConnection);
		connect(m_thread[i], SIGNAL(processStateChanged(QString,QString,int)), m_progressModel, SLOT(updateJob(QString,QString,int)), Qt::QueuedConnection);
		m_thread[i]->start();
	}

	button_closeDialog->setEnabled(false);
	button_AbortProcess->setEnabled(true);
}

void ProcessingDialog::abortEncoding(void)
{
	button_AbortProcess->setEnabled(false);
	
	for(int i = 0; i < 4; i++)
	{
		if(m_thread[i])
		{
			m_thread[i]->abort();
		}
	}
}

void ProcessingDialog::doneEncoding(void)
{
	progressBar->setValue(progressBar->value() + 1);
	
	if(--m_pendingJobs > 0)
	{
		return;
	}
	
	label_progress->setText("Completed.");
	m_progressIndicator->stop();

	setCloseButtonEnabled(true);
	button_closeDialog->setEnabled(true);
	button_AbortProcess->setEnabled(false);

	for(int i = 0; i < 4; i++)
	{
		if(m_thread[i])
		{
			m_thread[i]->terminate();
			m_thread[i]->wait();
			LAMEXP_DELETE(m_thread[i]);
		}
	}

	progressBar->setValue(100);
}

////////////////////////////////////////////////////////////
// Private Functions
////////////////////////////////////////////////////////////

void ProcessingDialog::setCloseButtonEnabled(bool enabled)
{
	HMENU hMenu = GetSystemMenu((HWND) winId(), FALSE);
	EnableMenuItem(hMenu, SC_CLOSE, MF_BYCOMMAND | (enabled ? MF_ENABLED : MF_GRAYED));
}