/* 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 "sci/sci.h"
#include "sci/engine/features.h"
#include "sci/engine/state.h"
#include "sci/engine/kernel.h"
#include "sci/engine/vm.h"		// for Object
#include "sci/sound/audio.h"
#ifdef ENABLE_SCI32
#include "sci/sound/audio32.h"
#endif
#include "sci/sound/soundcmd.h"
#include "sci/sound/sync.h"

#include "audio/mixer.h"
#include "common/system.h"

namespace Sci {

/**
 * Used for synthesized music playback
 */
reg_t kDoSound(EngineState *s, int argc, reg_t *argv) {
	if (!s)
		return make_reg(0, g_sci->_features->detectDoSoundType());
	error("not supposed to call this");
}

#define CREATE_DOSOUND_FORWARD(_name_) reg_t k##_name_(EngineState *s, int argc, reg_t *argv) { return g_sci->_soundCmd->k##_name_(s, argc, argv); }

CREATE_DOSOUND_FORWARD(DoSoundInit)
CREATE_DOSOUND_FORWARD(DoSoundPlay)
CREATE_DOSOUND_FORWARD(DoSoundDispose)
CREATE_DOSOUND_FORWARD(DoSoundMute)
CREATE_DOSOUND_FORWARD(DoSoundStop)
CREATE_DOSOUND_FORWARD(DoSoundStopAll)
CREATE_DOSOUND_FORWARD(DoSoundPause)
CREATE_DOSOUND_FORWARD(DoSoundResumeAfterRestore)
CREATE_DOSOUND_FORWARD(DoSoundMasterVolume)
CREATE_DOSOUND_FORWARD(DoSoundUpdate)
CREATE_DOSOUND_FORWARD(DoSoundFade)
CREATE_DOSOUND_FORWARD(DoSoundGetPolyphony)
CREATE_DOSOUND_FORWARD(DoSoundUpdateCues)
CREATE_DOSOUND_FORWARD(DoSoundSendMidi)
CREATE_DOSOUND_FORWARD(DoSoundGlobalReverb)
CREATE_DOSOUND_FORWARD(DoSoundSetHold)
CREATE_DOSOUND_FORWARD(DoSoundGetAudioCapability)
CREATE_DOSOUND_FORWARD(DoSoundSuspend)
CREATE_DOSOUND_FORWARD(DoSoundSetVolume)
CREATE_DOSOUND_FORWARD(DoSoundSetPriority)
CREATE_DOSOUND_FORWARD(DoSoundSetLoop)

#ifdef ENABLE_SCI32
reg_t kDoSoundMac32(EngineState *s, int argc, reg_t *argv) {
	// Several SCI 2.1 Middle Mac games, but not all, contain a modified kDoSound
	//  in which all but eleven subops were removed, changing their subop values to
	//  zero through ten. PQSWAT then restored all of the subops, but kept the new
	//  subop values that removing caused in the first place, and assigned new
	//  values to the restored subops. It is the only game that does this and it
	//  only uses two of them.
	switch (argv[0].toUint16()) {
	case 0:
		return g_sci->_soundCmd->kDoSoundMasterVolume(s, argc - 1, argv + 1);
	case 1:
		return g_sci->_soundCmd->kDoSoundGetAudioCapability(s, argc - 1, argv + 1);
	case 2:
		return g_sci->_soundCmd->kDoSoundInit(s, argc - 1, argv + 1);
	case 3:
		return g_sci->_soundCmd->kDoSoundDispose(s, argc - 1, argv + 1);
	case 4:
		return g_sci->_soundCmd->kDoSoundPlay(s, argc - 1, argv + 1);
	case 5:
		return g_sci->_soundCmd->kDoSoundStop(s, argc - 1, argv + 1);
	case 6:
		return g_sci->_soundCmd->kDoSoundPause(s, argc - 1, argv + 1);
	case 7:
		return g_sci->_soundCmd->kDoSoundFade(s, argc - 1, argv + 1);
	case 8:
		return g_sci->_soundCmd->kDoSoundSetVolume(s, argc - 1, argv + 1);
	case 9:
		return g_sci->_soundCmd->kDoSoundSetLoop(s, argc - 1, argv + 1);
	case 10:
		return g_sci->_soundCmd->kDoSoundUpdateCues(s, argc - 1, argv + 1);
	// PQSWAT only
	case 12: // kDoSoundRestore
		return kEmpty(s, argc - 1, argv + 1);
	case 13:
		return g_sci->_soundCmd->kDoSoundGetPolyphony(s, argc - 1, argv + 1);
	default:
		break;
	}

	error("Unknown kDoSoundMac32 subop %d", argv[0].toUint16());
	return s->r_acc;
}
#endif

reg_t kDoCdAudio(EngineState *s, int argc, reg_t *argv) {
	switch (argv[0].toUint16()) {
	case kSciAudioPlay: {
		if (argc < 2)
			return NULL_REG;

		uint16 track = argv[1].toUint16();
		uint32 startFrame = (argc > 2) ? argv[2].toUint16() * 75 : 0;
		uint32 totalFrames = (argc > 3) ? argv[3].toUint16() * 75 : 0;

		return make_reg(0, g_sci->_audio->audioCdPlay(track, startFrame, totalFrames));
	}
	case kSciAudioStop:
		g_sci->_audio->audioCdStop();

		if (getSciVersion() == SCI_VERSION_1_1)
			return make_reg(0, 1);

		break;
	case kSciAudioPause:
		warning("Can't pause CD Audio");
		break;
	case kSciAudioResume:
		// This seems to be hacked up to update the CD instead of resuming
		// audio like kDoAudio does.
		g_sci->_audio->audioCdUpdate();
		break;
	case kSciAudioPosition:
		return make_reg(0, g_sci->_audio->audioCdPosition());
	case kSciAudioWPlay: // CD Audio can't be preloaded
	case kSciAudioRate: // No need to set the audio rate
	case kSciAudioVolume: // The speech setting isn't used by CD Audio
	case kSciAudioLanguage: // No need to set the language
		break;
	case kSciAudioCD:
		// Init
		return make_reg(0, 1);
	default:
		error("kCdDoAudio: Unhandled case %d", argv[0].toUint16());
	}

	return s->r_acc;
}

/**
 * Used for speech playback and digital soundtracks in CD games.
 * This is the SCI16 version; SCI32 is handled separately.
 */
reg_t kDoAudio(EngineState *s, int argc, reg_t *argv) {
	// JonesCD and Mothergoose256 CD use different functions
	// based on the cdaudio.map file to use red book tracks.
	if (g_sci->_features->usesCdTrack()) {
		if (g_sci->getGameId() == GID_MOTHERGOOSE256) {
			// The CD audio version of Mothergoose256 CD is unique with a
			// custom interpreter for its audio. English is only in the CD
			// audio track while the other four languages are only in audio
			// resource files. This is transparent to the scripts which are
			// the same in all versions. The interpreter detected when
			// English was selected and used CD audio in that case.
			if (g_sci->getSciLanguage() == K_LANG_ENGLISH &&
				argv[0].toUint16() != kSciAudioLanguage) {
				return kDoCdAudio(s, argc, argv);
			}
		} else {
			return kDoCdAudio(s, argc, argv);
		}
	}

	Audio::Mixer *mixer = g_system->getMixer();

	switch (argv[0].toUint16()) {
	case kSciAudioWPlay:
	case kSciAudioPlay: {
		uint16 module;
		uint32 number;

		g_sci->_audio->stopAudio();
		// In SSCI, kDoAudio handles all samples, even if started by kDoSound.
		// We manage samples started by kDoSound in SoundCommandParser.
		g_sci->_soundCmd->stopAllSamples();

		if (argc == 2) {
			module = 65535;
			number = argv[1].toUint16();
		} else if (argc == 6 || argc == 8) {
			module = argv[1].toUint16();
			number = ((argv[2].toUint16() & 0xff) << 24) |
			         ((argv[3].toUint16() & 0xff) << 16) |
			         ((argv[4].toUint16() & 0xff) <<  8) |
			          (argv[5].toUint16() & 0xff);
		} else {
			warning("kDoAudio: Play called with an unknown number of parameters (%d)", argc);
			return NULL_REG;
		}

		if (argv[0].toUint16() == kSciAudioPlay) {
			g_sci->_audio->incrementPlayCounter();
		}

		debugC(kDebugLevelSound, "kDoAudio: play sample %d, module %d", number, module);

		// return sample length in ticks
		if (argv[0].toUint16() == kSciAudioWPlay)
			return make_reg(0, g_sci->_audio->wPlayAudio(module, number));
		else
			return make_reg(0, g_sci->_audio->startAudio(module, number));
	}
	case kSciAudioStop:
		debugC(kDebugLevelSound, "kDoAudio: stop");
		g_sci->_audio->stopAudio();
		// In SSCI, kDoAudio handles all samples, even if started by kDoSound.
		// We manage samples started by kDoSound in SoundCommandParser.
		g_sci->_soundCmd->stopAllSamples();
		break;
	case kSciAudioPause:
		debugC(kDebugLevelSound, "kDoAudio: pause");
		g_sci->_audio->pauseAudio();
		break;
	case kSciAudioResume:
		debugC(kDebugLevelSound, "kDoAudio: resume");
		g_sci->_audio->resumeAudio();
		break;
	case kSciAudioPosition:
		//debugC(kDebugLevelSound, "kDoAudio: get position");	// too verbose
		return make_reg(0, g_sci->_audio->getAudioPosition());
	case kSciAudioRate:
		debugC(kDebugLevelSound, "kDoAudio: set audio rate to %d", argv[1].toUint16());
		g_sci->_audio->setAudioRate(argv[1].toUint16());
		break;
	case kSciAudioVolume: {
		int16 volume = argv[1].toUint16();
		volume = CLIP<int16>(volume, 0, AUDIO_VOLUME_MAX);
		debugC(kDebugLevelSound, "kDoAudio: set volume to %d", volume);
		mixer->setVolumeForSoundType(Audio::Mixer::kSpeechSoundType, volume * 2);
		break;
	}
	case kSciAudioLanguage:
		// In SCI1.1: tests for digital audio support
		if (getSciVersion() == SCI_VERSION_1_1) {
			debugC(kDebugLevelSound, "kDoAudio: audio capability test");
			return make_reg(0, 1);
		} else {
			int16 language = argv[1].toSint16();

			// athrxx: It seems from disasm that the original KQ5 FM-Towns loads a default language (Japanese) audio map at the beginning
			// right after loading the video and audio drivers. The -1 language argument in here simply means that the original will stick
			// with Japanese. Instead of doing that we switch to the language selected in the launcher.
			if (g_sci->getPlatform() == Common::kPlatformFMTowns && language == -1) {
				// FM-Towns calls us to get the current language / also set the default language
				// This doesn't just happen right at the start, but also when the user clicks on the Sierra logo in the game menu
				// It uses the result of this call to either show "English Voices" or "Japanese Voices".

				// Language should have been set by setLauncherLanguage() already (or could have been modified by the scripts).
				// Get this language setting, so that the chosen language will get set for resource manager.
				language = g_sci->getSciLanguage();
			}

			debugC(kDebugLevelSound, "kDoAudio: set language to %d", language);

			if (language != -1)
				g_sci->getResMan()->setAudioLanguage(language);

			kLanguage kLang = g_sci->getSciLanguage();
			if (g_sci->_features->usesCdTrack() && language == K_LANG_ENGLISH) {
				// Mothergoose 256 CD has a multi-lingual version with English only on CD audio,
				// so setAudioLanguage() will fail because there are no English resource files.
				// The scripts cycle through languages to test which are available for the main
				// menu, so setting English must succeed. This was handled by a custom interpreter.
				kLang = K_LANG_ENGLISH;
			}
			g_sci->setSciLanguage(kLang);

			return make_reg(0, kLang);
		}
		break;
	case kSciAudioCD:
		debugC(kDebugLevelSound, "kDoAudio: CD audio subop");
		return kDoCdAudio(s, argc - 1, argv + 1);

	// 3 new subops in Pharkas CD (including CD demo). kDoAudio in Pharkas sits at seg026:038C
	case 11:
		// Not sure where this is used yet
		warning("kDoAudio: Unhandled case 11, %d extra arguments passed", argc - 1);
		break;
	case 12:
		// SSCI calls this function with no parameters from
		// the TalkRandCycle class and branches on the return
		// value like a boolean. The conjectured purpose of
		// this function is to ensure that the talker's mouth
		// does not move if there is read jitter (slow CD
		// drive, scratched CD). The old behavior here of not
		// doing anything caused a nonzero value to be left in
		// the accumulator by chance. This is equivalent, but
		// more explicit.

		return make_reg(0, 1);
	case 13:
		// SSCI returns a counter that increments each time a sample
		//  is played. This is used by the PointsSound and Narrator
		//  classes to detect if their sound was interrupted by
		//  another sample playing, since only one can play at a time.
		//  The counter is incremented on each kDoAudio(Play) and on
		//  each kDoSound(Play) when the sound is a sample, since SSCI
		//  just passes those on to kDoAudio.
		//
		// When awarding points, the icon bar is often disabled, and
		//  PointsSound:check polls its signal to detect when the
		//  sound is completed so that it can re-enable the icon bar.
		//  If the sound is interrupted by another sample then the icon
		//  bar could remain permanently disabled, so the play counter
		//  is stored before playing and PointsSound:check polls for
		//  a change. The Narrator class also does this to detect
		//  if speech was interrupted so that the game can continue.
		return make_reg(0, g_sci->_audio->getPlayCounter());
	default:
		warning("kDoAudio: Unhandled case %d, %d extra arguments passed", argv[0].toUint16(), argc - 1);
	}

	return s->r_acc;
}

reg_t kDoSync(EngineState *s, int argc, reg_t *argv) {
	switch (argv[0].toUint16()) {
	case kSciAudioSyncStart: {
		ResourceId id;

		g_sci->_sync->stop();

		if (argc == 3) {
			id = ResourceId(kResourceTypeSync, argv[2].toUint16());
		} else if (argc == 7) {
			id = ResourceId(kResourceTypeSync36, argv[2].toUint16(), argv[3].toUint16(), argv[4].toUint16(),
							argv[5].toUint16(), argv[6].toUint16());
		} else {
			warning("kDoSync: Start called with an unknown number of parameters (%d)", argc);
			return s->r_acc;
		}

		g_sci->_sync->start(id, argv[1]);
		break;
	}
	case kSciAudioSyncNext:
		g_sci->_sync->next(argv[1]);
		break;
	case kSciAudioSyncStop:
		g_sci->_sync->stop();
		break;
	default:
		error("DoSync: Unhandled subfunction %d", argv[0].toUint16());
	}

	return s->r_acc;
}

#ifdef ENABLE_SCI32
reg_t kDoAudio32(EngineState *s, int argc, reg_t *argv) {
	if (!s)
		return make_reg(0, getSciVersion());
	error("not supposed to call this");
}

reg_t kDoAudioInit(EngineState *s, int argc, reg_t *argv) {
	return make_reg(0, 0);
}

reg_t kDoAudioWaitForPlay(EngineState *s, int argc, reg_t *argv) {
	if (argc == 0) {
		if (g_sci->_features->hasSci3Audio()) {
			return make_reg(0, g_sci->_audio32->getNumUnlockedChannels());
		} else {
			return make_reg(0, g_sci->_audio32->getNumActiveChannels());
		}
	}

	return g_sci->_audio32->kernelPlay(false, s, argc, argv);
}

reg_t kDoAudioPlay(EngineState *s, int argc, reg_t *argv) {
	if (argc == 0) {
		return make_reg(0, g_sci->_audio32->getNumActiveChannels());
	}

	return g_sci->_audio32->kernelPlay(true, s, argc, argv);
}

reg_t kDoAudioStop(EngineState *s, int argc, reg_t *argv) {
	return g_sci->_audio32->kernelStop(s, argc, argv);
}

reg_t kDoAudioPause(EngineState *s, int argc, reg_t *argv) {
	return g_sci->_audio32->kernelPause(s, argc, argv);
}

reg_t kDoAudioResume(EngineState *s, int argc, reg_t *argv) {
	return g_sci->_audio32->kernelResume(s, argc, argv);
}

reg_t kDoAudioPosition(EngineState *s, int argc, reg_t *argv) {
	return g_sci->_audio32->kernelPosition(s, argc, argv);
}

reg_t kDoAudioRate(EngineState *s, int argc, reg_t *argv) {
	if (argc > 0) {
		const uint16 sampleRate = argv[0].toUint16();
		if (sampleRate != 0) {
			g_sci->_audio32->setSampleRate(sampleRate);
		}
	}

	return make_reg(0, g_sci->_audio32->getSampleRate());
}

reg_t kDoAudioVolume(EngineState *s, int argc, reg_t *argv) {
	return g_sci->_audio32->kernelVolume(s, argc, argv);
}

reg_t kDoAudioGetCapability(EngineState *s, int argc, reg_t *argv) {
	return make_reg(0, 1);
}

reg_t kDoAudioBitDepth(EngineState *s, int argc, reg_t *argv) {
	if (argc > 0) {
		const uint16 bitDepth = argv[0].toUint16();
		if (bitDepth != 0) {
			g_sci->_audio32->setBitDepth(bitDepth);
		}
	}

	return make_reg(0, g_sci->_audio32->getBitDepth());
}

reg_t kDoAudioMixing(EngineState *s, int argc, reg_t *argv) {
	return g_sci->_audio32->kernelMixing(argc, argv);
}

reg_t kDoAudioChannels(EngineState *s, int argc, reg_t *argv) {
	if (argc > 0) {
		const int16 numChannels = argv[0].toSint16();
		if (numChannels != 0) {
			g_sci->_audio32->setNumOutputChannels(numChannels);
		}
	}

	return make_reg(0, g_sci->_audio32->getNumOutputChannels());
}

reg_t kDoAudioPreload(EngineState *s, int argc, reg_t *argv) {
	if (argc > 0) {
		g_sci->_audio32->setPreload(argv[0].toUint16());
	}

	return make_reg(0, g_sci->_audio32->getPreload());
}

reg_t kDoAudioFade(EngineState *s, int argc, reg_t *argv) {
	return g_sci->_audio32->kernelFade(s, argc, argv);
}

reg_t kDoAudioHasSignal(EngineState *s, int argc, reg_t *argv) {
	return make_reg(0, g_sci->_audio32->hasSignal());
}

reg_t kDoAudioSetLoop(EngineState *s, int argc, reg_t *argv) {
	g_sci->_audio32->kernelLoop(s, argc, argv);
	return s->r_acc;
}

reg_t kDoAudioPan(EngineState *s, int argc, reg_t *argv) {
	g_sci->_audio32->kernelPan(s, argc, argv);
	return s->r_acc;
}

reg_t kDoAudioPanOff(EngineState *s, int argc, reg_t *argv) {
	g_sci->_audio32->kernelPanOff(s, argc, argv);
	return s->r_acc;
}

reg_t kSetLanguage(EngineState *s, int argc, reg_t *argv) {
	// Used by script 90 of MUMG Deluxe from the main menu to toggle between
	// English and Spanish in some versions and English and Spanish and
	// French and German in others.
	const Common::String audioDirectory = s->_segMan->getString(argv[0]);
	if (g_sci->getPlatform() == Common::kPlatformMacintosh) {
		g_sci->getResMan()->changeMacAudioDirectory(audioDirectory);
	} else {
		g_sci->getResMan()->changeAudioDirectory(audioDirectory);
	}
	return s->r_acc;
}

#endif

} // End of namespace Sci