/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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.
 *
 */

/*
 * This code is based on Broken Sword 2.5 engine
 *
 * Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdoerfer
 *
 * Licensed under GNU GPL v2
 *
 */

#include "sword25/sword25.h"
#include "sword25/sfx/soundengine.h"
#include "sword25/package/packagemanager.h"
#include "sword25/kernel/resource.h"

#include "audio/decoders/vorbis.h"

#include "common/system.h"
#include "common/config-manager.h"

namespace Sword25 {

class SoundResource : public Resource {
public:
	SoundResource(const Common::String &fileName) : Resource(fileName, Resource::TYPE_SOUND), _fname(fileName) {}
	virtual ~SoundResource() {
		debugC(1, kDebugSound, "SoundResource: Unloading file %s", _fname.c_str());
	}

private:
	Common::String _fname;
};


SoundEngine::SoundEngine(Kernel *pKernel) : ResourceService(pKernel) {
	if (!registerScriptBindings())
		error("Script bindings could not be registered.");
	else
		debugC(kDebugSound, "Script bindings registered.");

	_mixer = g_system->getMixer();

	for (int i = 0; i < SOUND_HANDLES; i++)
		_handles[i].type = kFreeHandle;
}

bool SoundEngine::init(uint sampleRate, uint channels) {
	return true;
}

void SoundEngine::update() {
}

void SoundEngine::setVolume(float volume, SOUND_TYPES type) {
	int val = 255 * volume;

	switch (type) {
	case SoundEngine::MUSIC:
		ConfMan.setInt("music_volume", val);
		_mixer->setVolumeForSoundType(Audio::Mixer::kMusicSoundType, val);
		break;
	case SoundEngine::SPEECH:
		ConfMan.setInt("speech_volume", val);
		_mixer->setVolumeForSoundType(Audio::Mixer::kSpeechSoundType, val);
		break;
	case SoundEngine::SFX:
		ConfMan.setInt("sfx_volume", val);
		_mixer->setVolumeForSoundType(Audio::Mixer::kSFXSoundType, val);
		break;
	default:
		error("Unknown SOUND_TYPE");
	}
}

float SoundEngine::getVolume(SOUND_TYPES type) {
	int val = 0;

	switch (type) {
	case SoundEngine::MUSIC:
		val = ConfMan.getInt("music_volume");
		break;
	case SoundEngine::SPEECH:
		val = ConfMan.getInt("speech_volume");
		break;
	case SoundEngine::SFX:
		val = ConfMan.getInt("sfx_volume");
		break;
	default:
		error("Unknown SOUND_TYPE");
	}

	return (float)val / 255.0;
}

void SoundEngine::pauseAll() {
	debugC(1, kDebugSound, "SoundEngine::pauseAll()");

	_mixer->pauseAll(true);
}

void SoundEngine::resumeAll() {
	debugC(1, kDebugSound, "SoundEngine::resumeAll()");

	_mixer->pauseAll(false);
}

void SoundEngine::pauseLayer(uint layer) {
	warning("STUB: SoundEngine::pauseLayer(%d)", layer);
}

void SoundEngine::resumeLayer(uint layer) {
	warning("STUB: SoundEngine::resumeLayer(%d)", layer);
}

SndHandle *SoundEngine::getHandle(uint *id) {

	// NOTE: Index 0 means error. Thus we're not using it
	for (uint i = 1; i < SOUND_HANDLES; i++) {
		if (_handles[i].type != kFreeHandle && !_mixer->isSoundHandleActive(_handles[i].handle)) {
			debugC(kDebugSound, 5, "Handle %d has finished playing", i);
			_handles[i].type = kFreeHandle;
		}
	}

	for (uint i = 1; i < SOUND_HANDLES; i++) {
		if (_handles[i].type == kFreeHandle) {
			debugC(kDebugSound, 5, "Allocated handle %d", i);
			if (id)
				*id = i;
			return &_handles[i];
		}
	}

	error("Sound::getHandle(): Too many sound handles");

	return NULL;
}

Audio::Mixer::SoundType getType(SoundEngine::SOUND_TYPES type) {
	switch (type) {
	case SoundEngine::MUSIC:
		return Audio::Mixer::kMusicSoundType;
	case SoundEngine::SPEECH:
		return Audio::Mixer::kSpeechSoundType;
	case SoundEngine::SFX:
		return Audio::Mixer::kSFXSoundType;
	default:
		error("Unknown SOUND_TYPE");
	}

	return Audio::Mixer::kPlainSoundType;
}

bool SoundEngine::playSound(const Common::String &fileName, SOUND_TYPES type, float volume, float pan, bool loop, int loopStart, int loopEnd, uint layer) {
	debugC(1, kDebugSound, "SoundEngine::playSound(%s, %d, %f, %f, %d, %d, %d, %d)", fileName.c_str(), type, volume, pan, loop, loopStart, loopEnd, layer);

	playSoundEx(fileName, type, volume, pan, loop, loopStart, loopEnd, layer);

	return true;
}

uint SoundEngine::playSoundEx(const Common::String &fileName, SOUND_TYPES type, float volume, float pan, bool loop, int loopStart, int loopEnd, uint layer) {
	Common::SeekableReadStream *in = Kernel::getInstance()->getPackage()->getStream(fileName);
#ifdef USE_VORBIS
	Audio::SeekableAudioStream *stream = Audio::makeVorbisStream(in, DisposeAfterUse::YES);
#endif
	uint id;
	SndHandle *handle = getHandle(&id);

	debugC(1, kDebugSound, "SoundEngine::playSoundEx(%s, %d, %f, %f, %d, %d, %d, %d)", fileName.c_str(), type, volume, pan, loop, loopStart, loopEnd, layer);

#ifdef USE_VORBIS
	_mixer->playStream(getType(type), &(handle->handle), stream, -1, (byte)(volume * 255), (int8)(pan * 127));
#endif

	return id;
}

void SoundEngine::setSoundVolume(uint handle, float volume) {
	assert(handle < SOUND_HANDLES);

	debugC(1, kDebugSound, "SoundEngine::setSoundVolume(%d, %f)", handle, volume);

	_mixer->setChannelVolume(_handles[handle].handle, (byte)(volume * 255));
}

void SoundEngine::setSoundPanning(uint handle, float pan) {
	assert(handle < SOUND_HANDLES);

	debugC(1, kDebugSound, "SoundEngine::setSoundPanning(%d, %f)", handle, pan);

	_mixer->setChannelBalance(_handles[handle].handle, (int8)(pan * 127));
}

void SoundEngine::pauseSound(uint handle) {
	assert(handle < SOUND_HANDLES);

	debugC(1, kDebugSound, "SoundEngine::pauseSound(%d)", handle);

	_mixer->pauseHandle(_handles[handle].handle, true);
}

void SoundEngine::resumeSound(uint handle) {
	assert(handle < SOUND_HANDLES);

	debugC(1, kDebugSound, "SoundEngine::resumeSound(%d)", handle);

	_mixer->pauseHandle(_handles[handle].handle, false);
}

void SoundEngine::stopSound(uint handle) {
	assert(handle < SOUND_HANDLES);

	debugC(1, kDebugSound, "SoundEngine::stopSound(%d)", handle);

	_mixer->stopHandle(_handles[handle].handle);
}

bool SoundEngine::isSoundPaused(uint handle) {
	warning("STUB: SoundEngine::isSoundPaused(%d)", handle);

	return false;
}

bool SoundEngine::isSoundPlaying(uint handle) {
	assert(handle < SOUND_HANDLES);

	debugC(1, kDebugSound, "SoundEngine::isSoundPlaying(%d)", handle);

	return _mixer->isSoundHandleActive(_handles[handle].handle);
}

float SoundEngine::getSoundVolume(uint handle) {
	warning("STUB: SoundEngine::getSoundVolume(%d)", handle);

	return 0;
}

float SoundEngine::getSoundPanning(uint handle) {
	warning("STUB: SoundEngine::getSoundPanning(%d)", handle);

	return 0;
}

Resource *SoundEngine::loadResource(const Common::String &fileName) {
	warning("STUB: SoundEngine::loadResource(%s)", fileName.c_str());

	return new SoundResource(fileName);
}

bool SoundEngine::canLoadResource(const Common::String &fileName) {
	Common::String fname = fileName;

	debugC(1, kDebugSound, "SoundEngine::canLoadResource(%s)", fileName.c_str());

	fname.toLowercase();

	return fname.hasSuffix(".ogg");
}


bool SoundEngine::persist(OutputPersistenceBlock &writer) {
	warning("STUB: SoundEngine::persist()");

	return true;
}

bool SoundEngine::unpersist(InputPersistenceBlock &reader) {
	warning("STUB: SoundEngine::unpersist()");

	return true;
}


} // End of namespace Sword25