/* 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/>.
 *
 */

#ifndef ULTIMA8_AUDIO_AUDIOPROCESS_H
#define ULTIMA8_AUDIO_AUDIOPROCESS_H

#include "ultima/ultima8/kernel/process.h"
#include "ultima/ultima8/usecode/intrinsics.h"
#include "ultima/shared/std/string.h"
#include "ultima/ultima8/misc/classtype.h"

namespace Ultima {
namespace Ultima8 {

class AudioSample;

class AudioProcess : public Process {
public:

	static const uint32 PITCH_SHIFT_NONE;

	struct SampleInfo {
		int32       _sfxNum;
		int32       _priority;
		ObjId       _objId;
		int32       _loops;
		int32       _channel;
		Std::string _barked;
		uint32      _curSpeechStart, _curSpeechEnd;
		uint32      _pitchShift;    // PITCH_SHIFT_NONE is normal
		uint16      _volume;         // 0-255
		int16       _calcVol;
		int8        _balance;
		bool		_ambient;

		SampleInfo() : _sfxNum(-1) { }
		SampleInfo(int32 s, int32 p, ObjId o, int32 l, int32 c, uint32 ps, uint16 v, int16 cv, int8 bal, bool ambient) :
			_sfxNum(s), _priority(p), _objId(o), _loops(l), _channel(c),
			_pitchShift(ps), _volume(v), _calcVol(cv), _balance(bal),
			_curSpeechStart(0), _curSpeechEnd(0), _ambient(ambient) { }
		SampleInfo(const Std::string &b, int32 shpnum, ObjId o, int32 c,
				   uint32 s, uint32 e, uint32 ps, uint16 v, int16 cv, int8 bal, bool ambient) :
			_sfxNum(-1), _priority(shpnum), _objId(o), _loops(0), _channel(c), _barked(b),
			_curSpeechStart(s), _curSpeechEnd(e), _pitchShift(ps), _volume(v),
			_calcVol(cv), _balance(bal), _ambient(ambient) { }
	};

	Std::list<SampleInfo> _sampleInfo;
public:
	// p_dynamic_class stuff
	ENABLE_RUNTIME_CLASSTYPE()

	AudioProcess(void);
	~AudioProcess(void) override;

	//! Get the current instance of the Audio Processes
	static AudioProcess *get_instance() {
		return _theAudioProcess;
	}

	INTRINSIC(I_playSFX);
	INTRINSIC(I_playAmbientSFX);
	INTRINSIC(I_playSFXCru);
	INTRINSIC(I_playAmbientSFXCru);
	INTRINSIC(I_isSFXPlaying);
	INTRINSIC(I_isSFXPlayingForObject);
	INTRINSIC(I_setVolumeSFX);
	INTRINSIC(I_setVolumeForObjectSFX);
	INTRINSIC(I_stopSFX);
	INTRINSIC(I_stopSFXCru);
	INTRINSIC(I_stopAllSFX);

	void run() override;

	void playSFX(int sfxNum, int priority, ObjId objId, int loops,
				 bool no_duplicates, uint32 pitchShift,
				 uint16 volume, int16 calcVol, int8 balance,
				 bool ambient);

	void playSFX(int sfxNum, int priority, ObjId objId, int loops,
				 bool no_duplicates = false, uint32 pitchShift = PITCH_SHIFT_NONE,
				 uint16 volume = 0x80, bool ambient = false) {
		playSFX(sfxNum, priority, objId, loops, no_duplicates, pitchShift, volume, -1, 0, ambient);
	}

	//! stop sfx on object.  set sfxNum = -1 to stop all for object.
	void stopSFX(int sfxNum, ObjId objId);
	bool isSFXPlaying(int sfxNum);
	bool isSFXPlayingForObject(int sfxNum, ObjId objId);
	void setVolumeSFX(int sfxNum, uint8 volume);
	void setVolumeForObjectSFX(ObjId objId, int sfxNum, uint8 volume);

	bool playSpeech(const Std::string &barked, int shapenum, ObjId objId,
					uint32 pitchShift = PITCH_SHIFT_NONE, uint16 volume = 255);
	void stopSpeech(const Std::string &barked, int shapenum, ObjId objId);
	bool isSpeechPlaying(const Std::string &barked, int shapenum);

	//! get length (in milliseconds) of speech
	uint32 getSpeechLength(const Std::string &barked, int shapenum) const;

	//! play a sample (without storing a SampleInfo)
	//! returns channel sample is played on, or -1
	int playSample(AudioSample *sample, int priority, int loops, bool isSpeech = false,
				   uint32 pitchShift = PITCH_SHIFT_NONE, int16 volume = 255,
				   int8 balance = 0, bool ambient = false);

	//! pause all currently playing samples
	void pauseAllSamples();
	//! unpause all currently playing samples
	void unpauseAllSamples();

	//! stop all samples except speech
	void stopAllExceptSpeech();

	bool loadData(Common::ReadStream *rs, uint32 version);
	void saveData(Common::WriteStream *ws) override;

private:
	uint32 _paused;

	//! play the next speech sample for the text in this SampleInfo
	//! note: si is reused if successful
	//! returns true if there was speech left to play, or false if finished
	bool continueSpeech(SampleInfo &si);

	bool calculateSoundVolume(ObjId objId, int16 &volume, int8 &balance) const;

	static AudioProcess *_theAudioProcess;
};

} // End of namespace Ultima8
} // End of namespace Ultima

#endif