/* 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#include "common/config-manager.h"

#include "saga/saga.h"
#include "saga/sound.h"

#include "audio/audiostream.h"
#include "audio/mixer.h"

namespace Saga {

Sound::Sound(SagaEngine *vm, Audio::Mixer *mixer) :
	_vm(vm), _mixer(mixer) {

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

	setVolume();
}

Sound::~Sound() {
}

SndHandle *Sound::getHandle() {
	for (int i = 0; i < SOUND_HANDLES; i++) {
		if (_handles[i].type == kFreeHandle)
			return &_handles[i];

		if (!_mixer->isSoundHandleActive(_handles[i].handle)) {
			_handles[i].type = kFreeHandle;
			return &_handles[i];
		}
	}

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

	return nullptr;	// for compilers that don't support NORETURN
}

void Sound::playSoundBuffer(Audio::SoundHandle *handle, const SoundBuffer &buffer, int volume,
				sndHandleType handleType, bool loop) {

	Audio::Mixer::SoundType soundType = (handleType == kVoiceHandle) ?
				Audio::Mixer::kSpeechSoundType : Audio::Mixer::kSFXSoundType;

	if (buffer.stream)
		_mixer->playStream(soundType, handle, Audio::makeLoopingAudioStream(buffer.stream, loop ? 0 : 1), -1, volume);
}

void Sound::playSound(SoundBuffer &buffer, int volume, bool loop, int resId) {
	// WORKAROUND
	// Prevent playing same looped sound for several times
	// Fixes bug #4686: "ITE: Cumulative Snoring sounds in Prince's Bedroom"
	for (int i = 0; i < SOUND_HANDLES; i++)
		if (_handles[i].type == kEffectHandle && _handles[i].resId == resId) {
			debug(1, "Skipped playing SFX #%d", resId);
			return;
		}

	SndHandle *handle = getHandle();

	handle->type = kEffectHandle;
	handle->resId = resId;
	playSoundBuffer(&handle->handle, buffer, 2 * volume, handle->type, loop);
}

void Sound::pauseSound() {
	for (int i = 0; i < SOUND_HANDLES; i++)
		if (_handles[i].type == kEffectHandle)
			_mixer->pauseHandle(_handles[i].handle, true);
}

void Sound::resumeSound() {
	for (int i = 0; i < SOUND_HANDLES; i++)
		if (_handles[i].type == kEffectHandle)
			_mixer->pauseHandle(_handles[i].handle, false);
}

void Sound::stopSound() {
	for (int i = 0; i < SOUND_HANDLES; i++)
		if (_handles[i].type == kEffectHandle) {
			_mixer->stopHandle(_handles[i].handle);
			_handles[i].type = kFreeHandle;
			_handles[i].resId = -1;
		}
}

void Sound::playVoice(SoundBuffer &buffer) {
	SndHandle *handle = getHandle();

	handle->type = kVoiceHandle;
	playSoundBuffer(&handle->handle, buffer, 255, handle->type, false);
}

void Sound::pauseVoice() {
	for (int i = 0; i < SOUND_HANDLES; i++)
		if (_handles[i].type == kVoiceHandle)
			_mixer->pauseHandle(_handles[i].handle, true);
}

void Sound::resumeVoice() {
	for (int i = 0; i < SOUND_HANDLES; i++)
		if (_handles[i].type == kVoiceHandle)
			_mixer->pauseHandle(_handles[i].handle, false);
}

void Sound::stopVoice() {
	for (int i = 0; i < SOUND_HANDLES; i++)
		if (_handles[i].type == kVoiceHandle) {
			_mixer->stopHandle(_handles[i].handle);
			_handles[i].type = kFreeHandle;
		}
}

void Sound::stopAll() {
	stopVoice();
	stopSound();
}

void Sound::setVolume() {
	bool mute = false;
	if (ConfMan.hasKey("mute"))
		mute = ConfMan.getBool("mute");

	_vm->_soundVolume = mute ? 0 : ConfMan.getInt("sfx_volume");
	_vm->_speechVolume = mute ? 0 : ConfMan.getInt("speech_volume");
	_mixer->setVolumeForSoundType(Audio::Mixer::kSFXSoundType, _vm->_soundVolume);
	_mixer->setVolumeForSoundType(Audio::Mixer::kSpeechSoundType, _vm->_speechVolume);
}

} // End of namespace Saga