/*  smplayer, GUI front-end for mplayer.
    Copyright (C) 2006-2016 Ricardo Villalba <rvm@users.sourceforge.net>

    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "audioequalizer.h"
#include "eqslider.h"
#include "images.h"
#include "preferences.h"
#include "global.h"
#include <QLayout>
#include <QPushButton>
#include <QLabel>
#include <QComboBox>
#include <QMessageBox>
#include <QDebug>

using namespace Global;

AudioEqualizer::AudioEqualizer( QWidget* parent, Qt::WindowFlags f)
	: QWidget(parent, f)
{
	createPresets();

	QBoxLayout *bl = new QHBoxLayout; //(0, 4, 2);

	for (int n = 0; n < 10; n++) {
		eq[n] = new EqSlider(this);
		eq[n]->setIcon( QPixmap() );
		eq[n]->sliderWidget()->setRange(-120, 120);
		eq[n]->sliderWidget()->setTracking(false);
		connect(eq[n], SIGNAL(valueChanged(int)), this, SLOT(updatePresetCombo()));
		bl->addWidget(eq[n]);
	}

	presets_combo = new QComboBox(this);
	connect(presets_combo, SIGNAL(activated(int)), this, SLOT(presetChanged(int)));

	presets_label = new QLabel("&Preset", this);
	presets_label->setBuddy(presets_combo);

	reset_button = new QPushButton( "&Reset", this);
	connect( reset_button, SIGNAL(clicked()), this, SLOT(reset()) );

	set_default_button = new QPushButton( "&Set as default values", this );
	connect( set_default_button, SIGNAL(clicked()), this, SLOT(setDefaults()) );

	apply_button = new QPushButton( "&Apply", this );
	connect( apply_button, SIGNAL(clicked()), this, SLOT(applyButtonClicked()) );

	close_button = new QPushButton( "&Close", this );
	connect( close_button, SIGNAL(clicked()), this, SLOT(close()) );

	QBoxLayout *button_layout = new QHBoxLayout; //(0, 4, 2);
	button_layout->addWidget(presets_label);
	button_layout->addWidget(presets_combo);
	button_layout->addStretch();
	button_layout->addWidget(apply_button);
	button_layout->addWidget(set_default_button);
	button_layout->addWidget(reset_button);
	button_layout->addWidget(close_button);

	QBoxLayout *layout = new QVBoxLayout(this); //, 4, 2);
	layout->addLayout(bl);
	layout->addLayout(button_layout);

	retranslateStrings();

	adjustSize();
	//setFixedSize( sizeHint() );
	
	if (size().height() < 244) resize(size().width(), 244);
}

AudioEqualizer::~AudioEqualizer() {
	//qDebug() << "AudioEqualizer::~AudioEqualizer: size:" << size();
}

void AudioEqualizer::createPresets() {
	preset_list.clear();
	AudioEqualizerList preset;

	// Classical
	preset.clear();
	preset << 0 << 0 << 0 << 0 << 0 << 0 << -41 << -41 << -41 << -53;
	preset_list[Classical] = preset;

	// Club
	preset.clear();
	preset << 0 << 0 << 47 << 29 << 29 << 29 << 17 << 0 << 0 << 0;
	preset_list[Club] = preset;

	// Dance
	preset.clear();
	preset << 53 << 41 << 11 << 0 << 0 << -29 << -41 << -41 << 0 << 0;
	preset_list[Dance] = preset;

	// Flat
	preset.clear();
	preset << 0 << 0 << 0 << 0 << 0 << 0 << 0 << 0 << 0 << 0;
	preset_list[Flat] = preset;

	// Fullbass
	preset.clear();
	preset << 53 << 53 << 53 << 29 << 5 << -23 << -47 << -59 << -65 << -65;
	preset_list[Fullbass] = preset;

	// FullbassTreble
	preset.clear();
	preset << 41 << 29 << 0 << -41 << -23 << 5 << 47 << 65 << 71 << 71;
	preset_list[FullbassTreble] = preset;

	// Fulltreble
	preset.clear();
	preset << -53 << -53 << -53 << -23 << 11 << 65 << 95 << 95 << 95 << 95;
	preset_list[Fulltreble] = preset;

	// Headphones
	preset.clear();
	preset << 23 << 65 << 29 << -17 << -11 << 5 << 23 << 53 << 71 << 83;
	preset_list[Headphones] = preset;

	// LargeHall
	preset.clear();
	preset << 59 << 59 << 29 << 29 << 0 << -23 << -23 << -23 << 0 << 0;
	preset_list[LargeHall] = preset;

	// Live
	preset.clear();
	preset << -23 << 0 << 23 << 29 << 29 << 29 << 23 << 11 << 11 << 11;
	preset_list[Live] = preset;

	// Party
	preset.clear();
	preset << 41 << 41 << 0 << 0 << 0 << 0 << 0 << 0 << 41 << 41;
	preset_list[Party] = preset;

	// Pop
	preset.clear();
	preset << -5 << 23 << 41 << 47 << 29 << 0 << -11 << -11 << -5 << -5;
	preset_list[Pop] = preset;

	// Reggae
	preset.clear();
	preset << 0 << 0 << 0 << -29 << 0 << 35 << 35 << 0 << 0 << 0;
	preset_list[Reggae] = preset;

	// Rock
	preset.clear();
	preset << 47 << 23 << 29 << -47 << -17 << 23 << 47 << 65 << 65 << 65;
	preset_list[Rock] = preset;

	// Ska
	preset.clear();
	preset << -11 << -23 << -23 << 0 << 23 << 29 << 47 << 53 << 65 << 53;
	preset_list[Ska] = preset;

	// Soft
	preset.clear();
	preset << 23 << 5 << 0 << -11 << 0 << 23 << 47 << 53 << 65 << 71;
	preset_list[Soft] = preset;

	// SoftRock
	preset.clear();
	preset << 23 << 23 << 11 << 0 << -23 << -29 << -17 << 0 << 11 << 47;
	preset_list[SoftRock] = preset;

	// Techno
	preset.clear();
	preset << 47 << 29 << 0 << -29 << -23 << 0 << 47 << 53 << 53 << 47;
	preset_list[Techno] = preset;
}


void AudioEqualizer::retranslateStrings() {
	setWindowTitle( tr("Audio Equalizer") );
	setWindowIcon( Images::icon("logo") );

	eq[0]->setLabel( tr("%1 Hz").arg("31.25") );
	eq[1]->setLabel( tr("%1 Hz").arg("62.50") );
	eq[2]->setLabel( tr("%1 Hz").arg("125") );
	eq[3]->setLabel( tr("%1 Hz").arg("250") );
	eq[4]->setLabel( tr("%1 Hz").arg("500") );
	eq[5]->setLabel( tr("%1 kHz").arg("1") );
	eq[6]->setLabel( tr("%1 kHz").arg("2") );
	eq[7]->setLabel( tr("%1 kHz").arg("4") );
	eq[8]->setLabel( tr("%1 kHz").arg("8") );
	eq[9]->setLabel( tr("%1 kHz").arg("16") );

	presets_label->setText( tr("&Preset") );
	apply_button->setText( tr("&Apply") );
	reset_button->setText( tr("&Reset") );
	set_default_button->setText( tr("&Set as default values") );
	close_button->setText(tr("&Close"));

	int presets_combo_index = presets_combo->currentIndex();
	if (presets_combo_index < 0) presets_combo_index = 0;
	presets_combo->clear();
	presets_combo->addItem( tr("Flat"), Flat);
	presets_combo->addItem( tr("Classical"), Classical);
	presets_combo->addItem( tr("Club"), Club);
	presets_combo->addItem( tr("Dance"), Dance);
	presets_combo->addItem( tr("Full bass"), Fullbass);
	presets_combo->addItem( tr("Full bass and treble"), FullbassTreble);
	presets_combo->addItem( tr("Full treble"), Fulltreble);
	presets_combo->addItem( tr("Headphones"), Headphones);
	presets_combo->addItem( tr("Large hall"), LargeHall);
	presets_combo->addItem( tr("Live"), Live);
	presets_combo->addItem( tr("Party"), Party);
	presets_combo->addItem( tr("Pop"), Pop);
	presets_combo->addItem( tr("Reggae"), Reggae);
	presets_combo->addItem( tr("Rock"), Rock);
	presets_combo->addItem( tr("Ska"), Ska);
	presets_combo->addItem( tr("Soft"), Soft);
	presets_combo->addItem( tr("Soft rock"), SoftRock);
	presets_combo->addItem( tr("Techno"), Techno);
	presets_combo->addItem( tr("Custom"), User_defined);
	presets_combo->setCurrentIndex(presets_combo_index);

	// What's this help:
	set_default_button->setWhatsThis(
			tr("Use the current values as default values for new videos.") );

	reset_button->setWhatsThis( tr("Set all controls to zero.") );
}

void AudioEqualizer::reset() {
	setValues(preset_list[Flat]);
	presets_combo->setCurrentIndex(presets_combo->findData(Flat));
}

void AudioEqualizer::setDefaults() {
	AudioEqualizerList l;
	for (int n = 0; n < 10; n++) {
		l << eq[n]->value();
	}
	pref->initial_audio_equalizer = l;

	QMessageBox::information(this, tr("Information"), 
                             tr("The current values have been stored to be "
                                "used as default.") );
}

void AudioEqualizer::setEqualizer(AudioEqualizerList l) {
	int p = findPreset(l);
	int index = presets_combo->findData(p);
	if (index != 1) {
		presets_combo->setCurrentIndex(index);
	} else {
		qWarning("AudioEqualizer::setEqualizer: preset not found");
	}
	setValues(l);
}

void AudioEqualizer::setValues(AudioEqualizerList l) {
	qDebug("AudioEqualizer::setValues");

	for (int n = 0; n < 10; n++) {
		eq[n]->blockSignals(true);
		eq[n]->setValue(l[n].toInt());
		eq[n]->blockSignals(false);
	}

	emit valuesChanged(l);
}

void AudioEqualizer::presetChanged(int index) {
	qDebug("AudioEqualizer::presetChanged: %d", index);
	int p = presets_combo->itemData(index).toInt();
	if (p != User_defined) {
		setValues(preset_list[p]);
	}
}

int AudioEqualizer::findPreset(AudioEqualizerList l) {
	QMap<int,AudioEqualizerList>::iterator i;
	for (i = preset_list.begin(); i != preset_list.end(); ++i) {
		if (l == i.value()) return i.key();
	}
	return User_defined;
}

void AudioEqualizer::applyButtonClicked() {
	AudioEqualizerList l;
	for (int n = 0; n < 10; n++) {
		l << eq[n]->value();
	}
	emit applyClicked( l );
}

void AudioEqualizer::updatePresetCombo() {
	qDebug("AudioEqualizer::updatePresetCombo");

	AudioEqualizerList l;
	for (int n = 0; n < 10; n++) {
		l << eq[n]->value();
	}

	int p = findPreset(l);
	int index = presets_combo->findData(p);
	if (index != 1) {
		presets_combo->setCurrentIndex(index);
	}
}

void AudioEqualizer::hideEvent( QHideEvent * ) {
	emit visibilityChanged();
}

void AudioEqualizer::showEvent( QShowEvent * ) {
	emit visibilityChanged();
}

// Language change stuff
void AudioEqualizer::changeEvent(QEvent *e) {
	if (e->type() == QEvent::LanguageChange) {
		retranslateStrings();
	} else {
		QWidget::changeEvent(e);
	}
}

#include "moc_audioequalizer.cpp"
