/*
 *  sounddlg.cpp  -  sound file selection and configuration dialog
 *  Program:  kalarm
 *  Copyright © 2005,2007,2008 by David Jarvie <djarvie@kde.org>
 *
 *  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.
 */

#ifndef WITHOUT_ARTS

#include "kalarm.h"

#include <tqlabel.h>
#include <tqhbox.h>
#include <tqgroupbox.h>
#include <tqlayout.h>
#include <tqfile.h>
#include <tqdir.h>
#include <tqwhatsthis.h>
#include <tqtooltip.h>

#include <tdelocale.h>
#include <kstandarddirs.h>
#include <kiconloader.h>
#ifdef WITHOUT_ARTS
#include <kaudioplayer.h>
#else
#include <tqtimer.h>
#include <arts/kartsdispatcher.h>
#include <arts/kartsserver.h>
#include <arts/kplayobjectfactory.h>
#include <arts/kplayobject.h>
#endif
#include <tdemessagebox.h>
#include <tdeio/netaccess.h>
#include <kdebug.h>

#include "checkbox.h"
#include "functions.h"
#include "lineedit.h"
#include "mainwindow.h"
#include "pushbutton.h"
#include "slider.h"
#include "soundpicker.h"
#include "spinbox.h"
#include "sounddlg.moc"


// Collect these widget labels together to ensure consistent wording and
// translations across different modules.
TQString SoundDlg::i18n_SetVolume()   { return i18n("Set volume"); }
TQString SoundDlg::i18n_v_SetVolume() { return i18n("Set &volume"); }
TQString SoundDlg::i18n_Repeat()      { return i18n("Repeat"); }
TQString SoundDlg::i18n_p_Repeat()    { return i18n("Re&peat"); }

static const char SOUND_DIALOG_NAME[] = "SoundDialog";


SoundDlg::SoundDlg(const TQString& file, float volume, float fadeVolume, int fadeSeconds, bool repeat,
                   const TQString& caption, TQWidget* parent, const char* name)
	: KDialogBase(parent, name, true, caption, Ok|Cancel, Ok, false),
	  mReadOnly(false),
	  mArtsDispatcher(0),
	  mPlayObject(0),
	  mPlayTimer(0)
{
	TQWidget* page = new TQWidget(this);
	setMainWidget(page);
	TQVBoxLayout* layout = new TQVBoxLayout(page, 0, spacingHint());

	// File play button
	TQHBox* box = new TQHBox(page);
	layout->addWidget(box);
	mFilePlay = new TQPushButton(box);
	mFilePlay->setPixmap(SmallIcon("media-playback-start"));
	mFilePlay->setFixedSize(mFilePlay->sizeHint());
	connect(mFilePlay, TQT_SIGNAL(clicked()), TQT_SLOT(playSound()));
	TQToolTip::add(mFilePlay, i18n("Test the sound"));
	TQWhatsThis::add(mFilePlay, i18n("Play the selected sound file."));

	// File name edit box
	mFileEdit = new LineEdit(LineEdit::Url, box);
	mFileEdit->setAcceptDrops(true);
	TQWhatsThis::add(mFileEdit, i18n("Enter the name or URL of a sound file to play."));

	// File browse button
	mFileBrowseButton = new PushButton(box);
	mFileBrowseButton->setPixmap(SmallIcon("document-open"));
	mFileBrowseButton->setFixedSize(mFileBrowseButton->sizeHint());
	connect(mFileBrowseButton, TQT_SIGNAL(clicked()), TQT_SLOT(slotPickFile()));
	TQToolTip::add(mFileBrowseButton, i18n("Choose a file"));
	TQWhatsThis::add(mFileBrowseButton, i18n("Select a sound file to play."));

	// Sound repetition checkbox
	mRepeatCheckbox = new CheckBox(i18n_p_Repeat(), page);
	mRepeatCheckbox->setFixedSize(mRepeatCheckbox->sizeHint());
	TQWhatsThis::add(mRepeatCheckbox,
	      i18n("If checked, the sound file will be played repeatedly for as long as the message is displayed."));
	layout->addWidget(mRepeatCheckbox);

	// Volume
	TQGroupBox* group = new TQGroupBox(i18n("Volume"), page);
	layout->addWidget(group);
	TQGridLayout* grid = new TQGridLayout(group, 4, 3, marginHint(), spacingHint());
	grid->addRowSpacing(0, fontMetrics().height() - marginHint() + spacingHint());
	grid->setColStretch(2, 1);
	int indentWidth = 3 * KDialog::spacingHint();
	grid->addColSpacing(0, indentWidth);
	grid->addColSpacing(1, indentWidth);
	// Get alignment to use in TQGridLayout (AlignAuto doesn't work correctly there)
	int alignment = TQApplication::reverseLayout() ? TQt::AlignRight : TQt::AlignLeft;

	// 'Set volume' checkbox
	box = new TQHBox(group);
	box->setSpacing(spacingHint());
	grid->addMultiCellWidget(box, 1, 1, 0, 2);
	mVolumeCheckbox = new CheckBox(i18n_v_SetVolume(), box);
	mVolumeCheckbox->setFixedSize(mVolumeCheckbox->sizeHint());
	connect(mVolumeCheckbox, TQT_SIGNAL(toggled(bool)), TQT_SLOT(slotVolumeToggled(bool)));
	TQWhatsThis::add(mVolumeCheckbox,
	      i18n("Select to choose the volume for playing the sound file."));

	// Volume slider
	mVolumeSlider = new Slider(0, 100, 10, 0, Qt::Horizontal, box);
	mVolumeSlider->setTickmarks(TQSlider::Below);
	mVolumeSlider->setTickInterval(10);
	mVolumeSlider->setSizePolicy(TQSizePolicy(TQSizePolicy::Expanding, TQSizePolicy::Fixed));
	TQWhatsThis::add(mVolumeSlider, i18n("Choose the volume for playing the sound file."));
	mVolumeCheckbox->setFocusWidget(mVolumeSlider);

	// Fade checkbox
	mFadeCheckbox = new CheckBox(i18n("Fade"), group);
	mFadeCheckbox->setFixedSize(mFadeCheckbox->sizeHint());
	connect(mFadeCheckbox, TQT_SIGNAL(toggled(bool)), TQT_SLOT(slotFadeToggled(bool)));
	TQWhatsThis::add(mFadeCheckbox,
	      i18n("Select to fade the volume when the sound file first starts to play."));
	grid->addMultiCellWidget(mFadeCheckbox, 2, 2, 1, 2, alignment);

	// Fade time
	mFadeBox = new TQHBox(group);
	mFadeBox->setSpacing(spacingHint());
	grid->addWidget(mFadeBox, 3, 2, alignment);
	TQLabel* label = new TQLabel(i18n("Time period over which to fade the sound", "Fade time:"), mFadeBox);
	label->setFixedSize(label->sizeHint());
	mFadeTime = new SpinBox(1, 999, 1, mFadeBox);
	mFadeTime->setLineShiftStep(10);
	mFadeTime->setFixedSize(mFadeTime->sizeHint());
	label->setBuddy(mFadeTime);
	label = new TQLabel(i18n("seconds"), mFadeBox);
	label->setFixedSize(label->sizeHint());
	TQWhatsThis::add(mFadeBox, i18n("Enter how many seconds to fade the sound before reaching the set volume."));

	// Fade slider
	mFadeVolumeBox = new TQHBox(group);
	mFadeVolumeBox->setSpacing(spacingHint());
	grid->addWidget(mFadeVolumeBox, 4, 2);
	label = new TQLabel(i18n("Initial volume:"), mFadeVolumeBox);
	label->setFixedSize(label->sizeHint());
	mFadeSlider = new Slider(0, 100, 10, 0, Qt::Horizontal, mFadeVolumeBox);
	mFadeSlider->setTickmarks(TQSlider::Below);
	mFadeSlider->setTickInterval(10);
	mFadeSlider->setSizePolicy(TQSizePolicy(TQSizePolicy::Expanding, TQSizePolicy::Fixed));
	label->setBuddy(mFadeSlider);
	TQWhatsThis::add(mFadeVolumeBox, i18n("Choose the initial volume for playing the sound file."));

	// Restore the dialogue size from last time
	TQSize s;
	if (KAlarm::readConfigWindowSize(SOUND_DIALOG_NAME, s))
		resize(s);

	// Initialise the control values
	mFileEdit->setText(file);
	mRepeatCheckbox->setChecked(repeat);
	mVolumeCheckbox->setChecked(volume >= 0);
	mVolumeSlider->setValue(volume >= 0 ? static_cast<int>(volume*100) : 100);
	mFadeCheckbox->setChecked(fadeVolume >= 0);
	mFadeSlider->setValue(fadeVolume >= 0 ? static_cast<int>(fadeVolume*100) : 100);
	mFadeTime->setValue(fadeSeconds);
	slotVolumeToggled(volume >= 0);
}

SoundDlg::~SoundDlg()
{
	stopPlay();
}

/******************************************************************************
* Set the read-only status of the dialogue.
*/
void SoundDlg::setReadOnly(bool readOnly)
{
	if (readOnly != mReadOnly)
	{
		mFileEdit->setReadOnly(readOnly);
		mFileBrowseButton->setReadOnly(readOnly);
		mRepeatCheckbox->setReadOnly(readOnly);
		mVolumeCheckbox->setReadOnly(readOnly);
		mVolumeSlider->setReadOnly(readOnly);
		mFadeCheckbox->setReadOnly(readOnly);
		mFadeTime->setReadOnly(readOnly);
		mFadeSlider->setReadOnly(readOnly);
		mReadOnly = readOnly;
	}
}

/******************************************************************************
* Return the entered repetition and volume settings:
* 'volume' is in range 0 - 1, or < 0 if volume is not to be set.
* 'fadeVolume is similar, with 'fadeTime' set to the fade interval in seconds.
* Reply = whether to repeat or not.
*/
bool SoundDlg::getSettings(float& volume, float& fadeVolume, int& fadeSeconds) const
{
	volume = mVolumeCheckbox->isChecked() ? (float)mVolumeSlider->value() / 100 : -1;
	if (mFadeCheckbox->isChecked())
	{
		fadeVolume  = (float)mFadeSlider->value() / 100;
		fadeSeconds = mFadeTime->value();
	}
	else
	{
		fadeVolume  = -1;
		fadeSeconds = 0;
	}
	return mRepeatCheckbox->isChecked();
}

/******************************************************************************
*  Called when the dialog's size has changed.
*  Records the new size in the config file.
*/
void SoundDlg::resizeEvent(TQResizeEvent* re)
{
	if (isVisible())
		KAlarm::writeConfigWindowSize(SOUND_DIALOG_NAME, re->size());
	mVolumeSlider->resize(mFadeSlider->size());
	KDialog::resizeEvent(re);
}

void SoundDlg::showEvent(TQShowEvent* se)
{
	mVolumeSlider->resize(mFadeSlider->size());
	KDialog::showEvent(se);
}

/******************************************************************************
*  Called when the OK button is clicked.
*/
void SoundDlg::slotOk()
{
	if (mReadOnly)
		reject();
	if (!checkFile())
		return;
	accept();
}

/******************************************************************************
* Called when the file browser button is clicked.
*/
void SoundDlg::slotPickFile()
{
	TQString url = SoundPicker::browseFile(mDefaultDir, mFileEdit->text());
	if (!url.isEmpty())
		mFileEdit->setText(url);
}

/******************************************************************************
* Called when the file play/stop button is clicked.
*/
void SoundDlg::playSound()
{
#ifdef WITHOUT_ARTS
	if (checkFile())
		KAudioPlayer::play(TQFile::encodeName(mFileName));
#else
	if (mPlayObject)
	{
		stopPlay();
		return;
	}
	if (!checkFile())
		return;
	KURL url(mFileName);
	MainWindow* mmw = MainWindow::mainMainWindow();
	if (!url.isValid()  ||  !TDEIO::NetAccess::exists(url, true, mmw)
	||  !TDEIO::NetAccess::download(url, mLocalAudioFile, mmw))
	{
		kdError(5950) << "SoundDlg::playAudio(): Open failure: " << mFileName << endl;
		KMessageBox::error(this, i18n("Cannot open audio file:\n%1").arg(mFileName));
		return;
	}
	mPlayTimer = new TQTimer(this);
	connect(mPlayTimer, TQT_SIGNAL(timeout()), TQT_SLOT(checkAudioPlay()));
	mArtsDispatcher = new KArtsDispatcher;
	mPlayStarted = false;
	KArtsServer aserver;
	Arts::SoundServerV2 sserver = aserver.server();
	KDE::PlayObjectFactory factory(sserver);
	mPlayObject = factory.createPlayObject(mLocalAudioFile, true);
	mFilePlay->setPixmap(SmallIcon("media-playback-stop"));
	TQToolTip::add(mFilePlay, i18n("Stop sound"));
	TQWhatsThis::add(mFilePlay, i18n("Stop playing the sound"));
	connect(mPlayObject, TQT_SIGNAL(playObjectCreated()), TQT_SLOT(checkAudioPlay()));
	if (!mPlayObject->object().isNull())
		checkAudioPlay();
#endif
}

/******************************************************************************
*  Called when the audio file has loaded and is ready to play, or on a timer
*  when play is expected to have completed.
*  If it is ready to play, start playing it (for the first time or repeated).
*  If play has not yet completed, wait a bit longer.
*/
void SoundDlg::checkAudioPlay()
{
#ifndef WITHOUT_ARTS
	if (!mPlayObject)
		return;
	if (mPlayObject->state() == Arts::posIdle)
	{
		// The file has loaded and is ready to play, or play has completed
		if (mPlayStarted)
		{
			// Play has completed
			stopPlay();
			return;
		}

		// Start playing the file
		kdDebug(5950) << "SoundDlg::checkAudioPlay(): start\n";
		mPlayStarted = true;
		mPlayObject->play();
	}

	// The sound file is still playing
	Arts::poTime overall = mPlayObject->overallTime();
	Arts::poTime current = mPlayObject->currentTime();
	int time = 1000*(overall.seconds - current.seconds) + overall.ms - current.ms;
	if (time < 0)
		time = 0;
	kdDebug(5950) << "SoundDlg::checkAudioPlay(): wait for " << (time+100) << "ms\n";
	mPlayTimer->start(time + 100, true);
#endif
}

/******************************************************************************
*  Called when play completes, the Silence button is clicked, or the window is
*  closed, to terminate audio access.
*/
void SoundDlg::stopPlay()
{
#ifndef WITHOUT_ARTS
	delete mPlayObject;      mPlayObject = 0;
	delete mArtsDispatcher;  mArtsDispatcher = 0;
	delete mPlayTimer;       mPlayTimer = 0;
	if (!mLocalAudioFile.isEmpty())
	{
		TDEIO::NetAccess::removeTempFile(mLocalAudioFile);   // removes it only if it IS a temporary file
		mLocalAudioFile = TQString();
	}
	mFilePlay->setPixmap(SmallIcon("media-playback-start"));
	TQToolTip::add(mFilePlay, i18n("Test the sound"));
	TQWhatsThis::add(mFilePlay, i18n("Play the selected sound file."));
#endif
}

/******************************************************************************
* Check whether the specified sound file exists.
* Note that KAudioPlayer::play() can only cope with local files.
*/
bool SoundDlg::checkFile()
{
	mFileName = mFileEdit->text();
	KURL url;
	if (KURL::isRelativeURL(mFileName))
	{
		// It's not an absolute URL, so check for an absolute path
		TQFileInfo f(mFileName);
		if (!f.isRelative())
			url.setPath(mFileName);
	}
	else
		url = KURL::fromPathOrURL(mFileName);   // it's an absolute URL
#ifdef WITHOUT_ARTS
	if (!url.isEmpty())
	{
		// It's an absolute path or URL.
		// Only allow local files for KAudioPlayer.
		if (url.isLocalFile()  &&  TDEIO::NetAccess::exists(url, true, this))
		{
			mFileName = url.path();
			return true;
		}
	}
	else
#else
	if (url.isEmpty())
#endif
	{
		// It's a relative path.
		// Find the first sound resource that contains files.
		TQStringList soundDirs = TDEGlobal::dirs()->resourceDirs("sound");
		if (!soundDirs.isEmpty())
		{
			TQDir dir;
			dir.setFilter(TQDir::Files | TQDir::Readable);
			for (TQStringList::ConstIterator it = soundDirs.begin();  it != soundDirs.end();  ++it)
			{
				dir = *it;
				if (dir.isReadable() && dir.count() > 2)
				{
					url.setPath(*it);
					url.addPath(mFileName);
					if (TDEIO::NetAccess::exists(url, true, this))
					{
						mFileName = url.path();
						return true;
					}
				}
			}
		}
		url.setPath(TQDir::homeDirPath());
		url.addPath(mFileName);
		if (TDEIO::NetAccess::exists(url, true, this))
		{
			mFileName = url.path();
			return true;
		}
	}
#ifdef WITHOUT_ARTS
	KMessageBox::sorry(this, i18n("File not found"));
	mFileName = TQString();
	return false;
#else
	return true;
#endif
}

/******************************************************************************
* Called when the Set Volume checkbox is toggled.
*/
void SoundDlg::slotVolumeToggled(bool on)
{
	mVolumeSlider->setEnabled(on);
	mFadeCheckbox->setEnabled(on);
	slotFadeToggled(on  &&  mFadeCheckbox->isChecked());
}

/******************************************************************************
* Called when the Fade checkbox is toggled.
*/
void SoundDlg::slotFadeToggled(bool on)
{
	mFadeBox->setEnabled(on);
	mFadeVolumeBox->setEnabled(on);
}

#endif // #ifndef WITHOUT_ARTS