/* 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.
 *
 * $URL$
 * $Id$
 *
 */
#include "common/scummsys.h"
 
#include "common/config-manager.h"
#include "common/events.h"
#include "common/file.h"
#include "common/random.h"
#include "common/fs.h"
#include "common/keyboard.h"
#include "common/substream.h"
#include "common/savefile.h"

#include "graphics/cursorman.h"
#include "graphics/surface.h"
#include "graphics/pixelformat.h"

#include "engines/util.h"
#include "engines/advancedDetector.h"

#include "audio/audiostream.h"

#include "composer/composer.h"
#include "composer/graphics.h"
#include "composer/resource.h"

namespace Composer {

// new script ops
enum {
	kOpPlusPlus = 0x1,
	kOpMinusMinus = 0x2,
	kOpAssign = 0x3,
	kOpAdd = 0x4,
	kOpSubtract = 0x5,
	kOpMultiply = 0x6,
	kOpDivide = 0x7,
	kOpModulo = 0x8,
	kOpMaybeAlsoAssign = 0x9,
	kOpBooleanAssign = 0xA,
	kOpNegate = 0xB,
	kOpAnd = 0xC,
	kOpOr = 0xD,
	kOpXor = 0xE,
	kOpNot = 0xF,
	kOpSqrt = 0x10,
	kOpRandom = 0x11,
	kOpExecuteScript = 0x12,
	kOpCallFunc = 0x13,
	kOpBoolLessThanEq = 0x17,
	kOpBoolLessThan = 0x16,
	kOpBoolGreaterThanEq = 0x15,
	kOpBoolGreaterThan = 0x14,
	kOpBoolEqual = 0x18,
	kOpBoolNotEqual = 0x19,
	kOpSaveArgs = 0x1A,
	kOpRestoreArgs = 0x1B,
	kOpReturn = 0x20,
	kOpLessThanEq = 0x22,
	kOpLessThan = 0x21,
	kOpGreaterThanEq = 0x24,
	kOpGreaterThan = 0x23,
	kOpEqual = 0x25,
	kOpNotEqual = 0x26,
	kOpJump = 0x80,
	kOpJumpIfNot = 0x81,
	kOpJumpIf = 0x82,
	kOpJumpIfNotValue = 0x83,
	kOpJumpIfValue = 0x84
};

enum {
	kFuncPlayAnim = 35001,
	kFuncStopAnim = 35002,
	// (no 35003)
	kFuncQueueScript = 35004,
	kFuncDequeueScript = 35005,
	kFuncSetCursor = 35006,
	kFuncGetCursor = 35007,
	kFuncShowCursor = 35008,
	kFuncHideCursor = 35009,
	// (no 35010)
	kFuncActivateButton = 35011,
	kFuncDeactivateButton = 35012,
	kFuncNewPage = 35013,
	kFuncLoadPage = 35014,
	kFuncUnloadPage = 35015,
	kFuncSetPalette = 35016,
	kFuncSaveVars = 35017,
	kFuncLoadVars = 35018,
	kFuncQueueScriptOnce = 35019,
	kFuncGetMousePos = 35020,
	kFuncChangeBackground = 35021,
	kFuncSetBackgroundColor = 35022,
	kFuncClearSprites = 35023,
	kFuncAddSprite = 35024,
	kFuncRemoveSprite = 35025,
	kFuncQuit = 35026,
	kFuncSaveData = 35027,
	kFuncLoadData = 35028,
	kFuncGetSpriteSize = 35029
};

Button::Button(Common::SeekableReadStream *stream, uint16 id) {
	_id = id;

	_type = stream->readUint16LE();
	_active = (_type & 0x8000) ? true : false;
	_type &= 0xfff;
	debug(9, "button: type %d, active %d", _type, _active);

	_zorder = stream->readUint16LE();
	_scriptId = stream->readUint16LE();
	_scriptIdRollOn = stream->readUint16LE();
	_scriptIdRollOff = stream->readUint16LE();

	stream->skip(4);

	uint16 size = stream->readUint16LE();

	switch (_type) {
	case kButtonRect:
	case kButtonEllipse:
		if (size != 4)
			error("button %d of type %d had %d points, not 4", id, _type, size);
		_rect.left = stream->readSint16LE();
		_rect.top = stream->readSint16LE();
		_rect.right = stream->readSint16LE();
		_rect.bottom = stream->readSint16LE();
		debug(9, "button: (%d, %d, %d, %d)", _rect.left, _rect.top, _rect.right, _rect.bottom);
		break;
	case kButtonSprites:
		for (uint i = 0; i < size; i++) {
			_spriteIds.push_back(stream->readSint16LE());
		}
		break;
	default:
		error("unknown button type %d", _type);
	}

	delete stream;
}

bool Button::contains(const Common::Point &pos) const {
	switch (_type) {
	case kButtonRect:
		return _rect.contains(pos);
	case kButtonEllipse:
		if (!_rect.contains(pos))
			return false;
		{
		int16 a = _rect.width() / 2;
		int16 b = _rect.height() / 2;
		if (!a || !b)
			return false;
		Common::Point adjustedPos = pos - Common::Point(_rect.left + a, _rect.top + b);
		return ((adjustedPos.x*adjustedPos.x)/(a*a) + (adjustedPos.y*adjustedPos.y)/(b*b) < 1);
		}
	case kButtonSprites:
		return false;
	default:
		error("internal error (button type %d)", _type);
	}
}

const Button *ComposerEngine::getButtonFor(const Sprite *sprite, const Common::Point &pos) {
	for (Common::List<Button>::iterator i = _buttons.reverse_begin(); i != _buttons.end(); --i) {
		if (!i->_active)
			continue;

		if (i->_spriteIds.empty()) {
			if (i->contains(pos))
				return &(*i);
			continue;
		}

		if (!sprite)
			continue;

		for (uint j = 0; j < i->_spriteIds.size(); j++) {
			if (i->_spriteIds[j] == sprite->_id)
				return &(*i);
		}
	}

	return NULL;
}

ComposerEngine::ComposerEngine(OSystem *syst, const ComposerGameDescription *gameDesc) : Engine(syst), _gameDescription(gameDesc) {
	_rnd = new Common::RandomSource("composer");
	_audioStream = NULL;
}

ComposerEngine::~ComposerEngine() {
	DebugMan.clearAllDebugChannels();

	for (Common::List<Library>::iterator i = _libraries.begin(); i != _libraries.end(); i++)
		delete i->_archive;
	for (Common::List<Sprite>::iterator i = _sprites.begin(); i != _sprites.end(); i++)
		i->_surface.free();

	delete _rnd;
}

Common::Error ComposerEngine::run() {
	Common::Event event;

	_vars.resize(1000);
	for (uint i = 0; i < _vars.size(); i++)
		_vars[i] = 0;

	_queuedScripts.resize(10);
	for (uint i = 0; i < _queuedScripts.size(); i++) {
		_queuedScripts[i]._count = 0;
		_queuedScripts[i]._scriptId = 0;
	}

	_mouseVisible = true;
	_mouseEnabled = false;
	_mouseSpriteId = 0;
	_lastButton = NULL;

	_directoriesToStrip = 1;
	if (!_bookIni.loadFromFile("book.ini")) {
		_directoriesToStrip = 0;
		if (!_bookIni.loadFromFile("programs/book.ini"))
			error("failed to find book.ini");
	}

	uint width = 640;
	if (_bookIni.hasKey("Width", "Common"))
		width = atoi(getStringFromConfig("Common", "Width").c_str());
	uint height = 480;
	if (_bookIni.hasKey("Height", "Common"))
		height = atoi(getStringFromConfig("Common", "Height").c_str());
	initGraphics(width, height, true);
	_surface.create(width, height, Graphics::PixelFormat::createFormatCLUT8());
	_needsUpdate = true;

	loadLibrary(0);

	uint fps = atoi(getStringFromConfig("Common", "FPS").c_str());
	uint frameTime = 1000 / fps;
	uint32 lastDrawTime = 0;
	while (!shouldQuit()) {
		for (uint i = 0; i < _pendingPageChanges.size(); i++) {
			if (_pendingPageChanges[i]._remove)
				unloadLibrary(_pendingPageChanges[i]._pageId);
			else
				loadLibrary(_pendingPageChanges[i]._pageId);

			lastDrawTime = _system->getMillis();
		}
		_pendingPageChanges.clear();

		uint32 thisTime = _system->getMillis();
		for (uint i = 0; i < _queuedScripts.size(); i++) {
			QueuedScript &script = _queuedScripts[i];
			if (!script._count)
				continue;
			if (script._baseTime + script._duration > thisTime)
				continue;
			if (script._count != 0xffffffff)
				script._count--;
			script._baseTime = thisTime;
			runScript(script._scriptId, i, 0, 0);
		}

		if (lastDrawTime + frameTime <= thisTime) {
			// catch up if we're more than 5 frames behind
			if (lastDrawTime + (frameTime * 5) <= thisTime)
				lastDrawTime = thisTime - (frameTime * 5);
			else
				lastDrawTime += frameTime;

			redraw();

			processAnimFrame();
		} else if (_needsUpdate) {
			redraw();
		}

		while (_eventMan->pollEvent(event)) {
			switch (event.type) {
			case Common::EVENT_LBUTTONDOWN:
				onMouseDown(event.mouse);
				break;

			case Common::EVENT_LBUTTONUP:
				break;

			case Common::EVENT_RBUTTONDOWN:
				break;

			case Common::EVENT_MOUSEMOVE:
				onMouseMove(event.mouse);
				break;

			case Common::EVENT_KEYDOWN:
				switch (event.kbd.keycode) {
				case Common::KEYCODE_d:
					/*if (event.kbd.hasFlags(Common::KBD_CTRL)) {
						// Start the debugger
						getDebugger()->attach();
						getDebugger()->onFrame();
					}*/
					break;

				case Common::KEYCODE_q:
					if (event.kbd.hasFlags(Common::KBD_CTRL))
						quitGame();
					break;

				default:
					break;
				}

				onKeyDown(event.kbd.keycode);
				break;

			case Common::EVENT_QUIT:
			case Common::EVENT_RTL:
				quitGame();
				break;

			default:
				break;
			}
		}

		_system->delayMillis(20);
	}

	return Common::kNoError;
}

void ComposerEngine::onMouseDown(const Common::Point &pos) {
	if (!_mouseEnabled || !_mouseVisible)
		return;

	const Sprite *sprite = getSpriteAtPos(pos);
	const Button *button = getButtonFor(sprite, pos);
	if (!button)
		return;

	// TODO: other buttons?
	uint16 buttonsDown = 1; // MK_LBUTTON

	uint16 spriteId = sprite ? sprite->_id : 0;
	runScript(button->_scriptId, button->_id, buttonsDown, spriteId);
}

void ComposerEngine::onMouseMove(const Common::Point &pos) {
	_lastMousePos = pos;

	if (!_mouseEnabled || !_mouseVisible)
		return;

	// TODO: do we need to keep track of this?
	uint buttonsDown = 0;

	const Sprite *sprite = getSpriteAtPos(pos);
	const Button *button = getButtonFor(sprite, pos);
	if (_lastButton != button) {
		if (_lastButton && _lastButton->_scriptIdRollOff)
			runScript(_lastButton->_scriptIdRollOff, _lastButton->_id, buttonsDown, 0);
		_lastButton = button;
		if (_lastButton && _lastButton->_scriptIdRollOn)
			runScript(_lastButton->_scriptIdRollOn, _lastButton->_id, buttonsDown, 0);
	}

	if (_mouseSpriteId) {
		addSprite(_mouseSpriteId, 0, 0, _lastMousePos - _mouseOffset);
		_needsUpdate = true;
	}
}

void ComposerEngine::onKeyDown(uint16 keyCode) {
	runEvent(5, keyCode, 0, 0);
	runEvent(6, keyCode, 0, 0);
}

void ComposerEngine::setCursor(uint16 id, const Common::Point &offset) {
	_mouseOffset = offset;
	if (_mouseSpriteId == id)
		return;

	if (_mouseSpriteId && _mouseVisible) {
		removeSprite(_mouseSpriteId, 0);
	}
	_mouseSpriteId = id;
	if (_mouseSpriteId && _mouseVisible) {
		addSprite(_mouseSpriteId, 0, 0, _lastMousePos - _mouseOffset);
	}
}

void ComposerEngine::setCursorVisible(bool visible) {
	if (!_mouseSpriteId)
		return;

	if (visible && !_mouseVisible) {
		_mouseVisible = true;
		addSprite(_mouseSpriteId, 0, 0, _lastMousePos - _mouseOffset);
		onMouseMove(_lastMousePos);
	} else if (!visible && _mouseVisible) {
		_mouseVisible = false;
		removeSprite(_mouseSpriteId, 0);
	}
}

Common::String ComposerEngine::getStringFromConfig(const Common::String &section, const Common::String &key) {
	Common::String value;
	if (!_bookIni.getKey(key, section, value))
		error("failed to find key '%s' in section '%s' of book config", key.c_str(), section.c_str());
	return value;
}

Common::String ComposerEngine::getFilename(const Common::String &section, uint id) {
	Common::String key = Common::String::format("%d", id);
	Common::String filename = getStringFromConfig(section, key);
	while (filename.size() && (filename[0] == '~' || filename[0] == ':' || filename[0] == '\\'))
		filename = filename.c_str() + 1;

	uint slashesToStrip = _directoriesToStrip;
	while (slashesToStrip--) {
		for (uint i = 0; i < filename.size(); i++) {
			if (filename[i] != '\\')
				continue;
			filename = filename.c_str() + i + 1;
			break;
		}
	}

	Common::String outFilename;
	for (uint i = 0; i < filename.size(); i++) {
		if (filename[i] == '\\')
			outFilename += '/';
		else
			outFilename += filename[i];
	}
	return outFilename;
}

void ComposerEngine::loadLibrary(uint id) {
	if (!id)
		id = atoi(getStringFromConfig("Common", "StartUp").c_str());
	Common::String filename = getFilename("Libs", id);

	Library library;

	library._id = id;
	library._archive = new ComposerArchive();
	if (!library._archive->openFile(filename))
		error("failed to open '%s'", filename.c_str());
	_libraries.push_front(library);

	Common::Array<uint16> buttonResources = library._archive->getResourceIDList(ID_BUTN);
	for (uint i = 0; i < buttonResources.size(); i++) {
		uint16 buttonId = buttonResources[i];
		Common::SeekableReadStream *stream = library._archive->getResource(ID_BUTN, buttonId);
		Button button(stream, buttonId);

		bool inserted = false;
		for (Common::List<Button>::iterator b = _buttons.begin(); b != _buttons.end(); b++) {
			if (button._zorder <= b->_zorder)
				continue;
			_buttons.insert(b, button);
			inserted = true;
			break;
		}
		if (!inserted)
			_buttons.push_back(button);
	}

	// add background sprite, if it exists
	if (hasResource(ID_BMAP, 1000))
		addSprite(1000, 0, 0xffff, Common::Point());

	// TODO: better CTBL logic
	loadCTBL(1000, 100);

	// Run the startup script.
	runScript(1000, 0, 0, 0);

	_mouseEnabled = true;
	onMouseMove(_lastMousePos);

	runEvent(3, id, 0, 0);
}

void ComposerEngine::unloadLibrary(uint id) {
	for (Common::List<Library>::iterator i = _libraries.begin(); i != _libraries.end(); i++) {
		if (i->_id != id)
			continue;

		for (Common::List<Animation *>::iterator j = _anims.begin(); j != _anims.end(); j++) {
			delete *j;
		}
		_anims.clear();
		for (Common::List<Pipe *>::iterator j = _pipes.begin(); j != _pipes.end(); j++) {
			delete *j;
		}
		_pipes.clear();

		for (Common::List<Sprite>::iterator j = _sprites.begin(); j != _sprites.end(); j++) {
			j->_surface.free();
		}
		_sprites.clear();
		_buttons.clear();

		_lastButton = NULL;

		_mixer->stopAll();
		_audioStream = NULL;

		for (uint j = 0; j < _queuedScripts.size(); j++) {
			_queuedScripts[j]._count = 0;
			_queuedScripts[j]._scriptId = 0;
		}

		delete i->_archive;
		_libraries.erase(i);
		return;
	}

	error("tried to unload library %d, which isn't loaded", id);
}

bool ComposerEngine::hasResource(uint32 tag, uint16 id) {
	for (Common::List<Library>::iterator i = _libraries.begin(); i != _libraries.end(); i++)
		if (i->_archive->hasResource(tag, id))
			return true;

	return false;
}

Common::SeekableReadStream *ComposerEngine::getResource(uint32 tag, uint16 id) {
	for (Common::List<Library>::iterator i = _libraries.begin(); i != _libraries.end(); i++)
		if (i->_archive->hasResource(tag, id))
			return i->_archive->getResource(tag, id);

	error("No loaded library contains '%s' %04x", tag2str(tag), id);
}

void ComposerEngine::runEvent(uint16 id, int16 param1, int16 param2, int16 param3) {
	if (!hasResource(ID_EVNT, id))
		return;

	Common::SeekableReadStream *stream = getResource(ID_EVNT, id);
	if (stream->size() != 2)
		error("bad EVNT size %d", stream->size());
	uint16 scriptId = stream->readUint16LE();
	delete stream;

	if (!scriptId)
		return;

	debug(2, "running event %d via script %d(%d, %d, %d)", id, scriptId, param1, param2, param3);

	runScript(scriptId, param1, param2, param3);
}

int16 ComposerEngine::runScript(uint16 id, int16 param1, int16 param2, int16 param3) {
	_vars[1] = param1;
	_vars[2] = param2;
	_vars[3] = param3;

	runScript(id);

	return _vars[0];
}

int16 ComposerEngine::getArg(uint16 arg, uint16 type) {
	switch (type) {
	case 0:
		return (int16)arg;
	case 1:
		return (int16)_vars[arg];
	case 2:
		return (int16)_vars[_vars[arg]];
	default:
		error("invalid argument type %d (getting arg %d)", type, arg);
	}
}

void ComposerEngine::setArg(uint16 arg, uint16 type, uint16 val) {
	switch (type) {
	case 1:
		_vars[arg] = val;
		break;
	case 2:
		_vars[_vars[arg]] = val;
		break;
	default:
		error("invalid argument type %d (setting arg %d)", type, arg);
	}

}

void ComposerEngine::runScript(uint16 id) {
	if (!hasResource(ID_SCRP, id)) {
		warning("ignoring attempt to run script %d, because it doesn't exist", id);
		return;
	}

	uint stackBase = _stack.size();
	_stack.resize(_stack.size() + 19);

	Common::SeekableReadStream *stream = getResource(ID_SCRP, id);
	if (stream->size() < 2)
		error("SCRP was too small (%d)", stream->size());
	uint16 size = stream->readUint16LE();
	if (stream->size() < 2 + 2*size)
		error("SCRP was too small (%d, but claimed %d entries)", stream->size(), size);
	uint16 *script = new uint16[size];
	for (uint i = 0; i < size; i++)
		script[i] = stream->readUint16LE();
	delete stream;

	uint16 pos = 0;
	bool lastResult = false;
	while (pos < size) {
		int16 val1, val2, val3;

		byte op = (byte)script[pos];
		uint numParams = (script[pos] & 0x300) >> 8; // 2 bits
		if (pos + numParams >= size)
			error("script ran out of content");
		uint arg1 = (script[pos] & 0xc00) >> 10; // 2 bits
		uint arg2 = (script[pos] & 0x3000) >> 12; // 2 bits
		uint arg3 = (script[pos] & 0xC000) >> 14; // 2 bits
		switch (op) {
		case kOpPlusPlus:
			if (numParams != 1)
				error("kOpPlusPlus had wrong number of params (%d)", numParams);
			val1 = getArg(script[pos + 1], arg1);
			debug(9, "[%d/%d]++ (now %d)", script[pos + 1], arg1, val1 + 1);
			setArg(script[pos + 1], arg1, val1 + 1);
			break;
		case kOpMinusMinus:
			if (numParams != 1)
				error("kOpMinusMinus had wrong number of params (%d)", numParams);
			val1 = getArg(script[pos + 1], arg1);
			debug(9, "[%d/%d]-- (now %d)", script[pos + 1], arg1, val1 - 1);
			setArg(script[pos + 1], arg1, val1 - 1);
			break;
		case kOpAssign:
			if (numParams != 2)
				error("kOpAssign had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			debug(9, "[%d/%d] = [%d/%d] (%d)", script[pos + 1], arg1, script[pos + 2], arg2, val2);
			setArg(script[pos + 1], arg1, val2);
			break;
		case kOpAdd:
			if (numParams != 3)
				error("kOpAdd had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			val3 = getArg(script[pos + 3], arg3);
			debug(9, "[%d/%d] = [%d/%d]=%d + [%d/%d]=%d (%d)", script[pos + 1], arg1, script[pos + 2], arg2, val2, script[pos+3], arg3, val3, val2 + val3);
			setArg(script[pos + 1], arg1, val2 + val3);
			break;
		case kOpSubtract:
			if (numParams != 3)
				error("kOpSubtract had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			val3 = getArg(script[pos + 3], arg3);
			debug(9, "[%d/%d] = [%d/%d]=%d - [%d/%d]=%d (%d)", script[pos + 1], arg1, script[pos + 2], arg2, val2, script[pos+3], arg3, val3, val2 - val3);
			setArg(script[pos + 1], arg1, val2 - val3);
			break;
		case kOpMultiply:
			if (numParams != 3)
				error("kOpMultiply had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			val3 = getArg(script[pos + 3], arg3);
			debug(9, "[%d/%d] = [%d/%d]=%d * [%d/%d]=%d (%d)", script[pos + 1], arg1, script[pos + 2], arg2, val2, script[pos+3], arg3, val3, val2 * val3);
			setArg(script[pos + 1], arg1, val2 * val3);
			break;
		case kOpDivide:
			if (numParams != 3)
				error("kOpDivide had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			val3 = getArg(script[pos + 3], arg3);
			if (val3 == 0)
				error("script tried to divide by zero");
			debug(9, "[%d/%d] = [%d/%d]=%d / [%d/%d]=%d (%d)", script[pos + 1], arg1, script[pos + 2], arg2, val2, script[pos+3], arg3, val3, val2 / val3);
			setArg(script[pos + 1], arg1, val2 / val3);
			break;
		case kOpModulo:
			if (numParams != 3)
				error("kOpModulo had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			val3 = getArg(script[pos + 3], arg3);
			if (val3 == 0)
				error("script tried to divide by zero (modulo)");
			debug(9, "[%d/%d] = [%d/%d]=%d %% [%d/%d]=%d (%d)", script[pos + 1], arg1, script[pos + 2], arg2, val2, script[pos+3], arg3, val3, val2 % val3);
			setArg(script[pos + 1], arg1, val2 % val3);
			break;
		case kOpMaybeAlsoAssign:
			if (numParams != 2)
				error("kOpMaybeAlsoAssign had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			debug(9, "[%d/%d] =(?) [%d/%d] (%d)", script[pos + 1], arg1, script[pos + 2], arg2, val2);
			setArg(script[pos + 1], arg1, val2);
			break;
		case kOpBooleanAssign:
			if (numParams != 2)
				error("kOpBooleanAssign had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			debug(9, "[%d/%d] = [%d/%d] (%d) ? 1 : 0", script[pos + 1], arg1, script[pos + 2], arg2, val2);
			setArg(script[pos + 1], arg1, val2 ? 1 : 0);
			break;
		case kOpNegate:
			if (numParams != 2)
				error("kOpNegate had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			debug(9, "[%d/%d] = -[%d/%d] (%d)", script[pos + 1], arg1, script[pos + 2], arg2, val2);
			setArg(script[pos + 1], arg1, -val2);
			break;
		case kOpAnd:
			if (numParams != 3)
				error("kOpAnd had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			val3 = getArg(script[pos + 3], arg3);
			debug(9, "[%d/%d] = [%d/%d]=%d & [%d/%d]=%d (%d)", script[pos + 1], arg1, script[pos + 2], arg2, val2, script[pos+3], arg3, val3, val2 & val3);
			setArg(script[pos + 1], arg1, val2 & val3);
			break;
		case kOpOr:
			if (numParams != 3)
				error("kOpOr had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			val3 = getArg(script[pos + 3], arg3);
			debug(9, "[%d/%d] = [%d/%d]=%d | [%d/%d]=%d (%d)", script[pos + 1], arg1, script[pos + 2], arg2, val2, script[pos+3], arg3, val3, val2 | val3);
			setArg(script[pos + 1], arg1, val2 | val3);
			break;
		case kOpXor:
			if (numParams != 3)
				error("kOpXor had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			val3 = getArg(script[pos + 3], arg3);
			debug(9, "[%d/%d] = [%d/%d]=%d ^ [%d/%d]=%d (%d)", script[pos + 1], arg1, script[pos + 2], arg2, val2, script[pos+3], arg3, val3, val2 ^ val3);
			setArg(script[pos + 1], arg1, val2 ^ val3);
			break;
		case kOpNot:
			if (numParams != 2)
				error("kOpNot had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			debug(9, "[%d/%d] = ![%d/%d] (!%d)", script[pos + 1], arg1, script[pos + 2], arg2, val2);
			setArg(script[pos + 1], arg1, val2 ? 0 : 1);
			break;
		case kOpSqrt:
			if (numParams != 2)
				error("kOpSqrt had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			debug(9, "[%d/%d] = sqrt([%d/%d] (%d))", script[pos + 1], arg1, script[pos + 2], arg2, val2);
			setArg(script[pos + 1], arg1, (int16)sqrt((double)val2));
			break;
		case kOpRandom:
			if (numParams != 3)
				error("kOpRandom had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			val3 = getArg(script[pos + 3], arg3);
			val1 = _rnd->getRandomNumberRng(val2, val3);
			debug(9, "[%d/%d] = rnd([%d/%d]=%d, [%d/%d]=%d) (%d)", script[pos + 1], arg1, script[pos + 2], arg2, val2, script[pos+3], arg3, val3, val1);
			setArg(script[pos + 1], arg1, val1);
			break;
		case kOpExecuteScript:
			if (numParams != 1)
				error("kOpExecuteScript had wrong number of params (%d)", numParams);
			val1 = getArg(script[pos + 1], arg1);
			debug(8, "run script [%d/%d]=%d", script[pos + 1], arg1, val1);
			runScript(val1);
			debug(8, "done run script");
			break;
		case kOpCallFunc:
			if (numParams != 1)
				error("kOpCallFunc had wrong number of params (%d)", numParams);
			val1 = getArg(script[pos + 1], arg1);
			debug(8, "%d(%d, %d, %d)", (uint16)val1, _vars[1], _vars[2], _vars[3]);
			_vars[0] = scriptFuncCall(val1, _vars[1], _vars[2], _vars[3]);
			break;
		case kOpBoolLessThanEq:
			if (numParams != 2)
				error("kOpBoolLessThanEq had wrong number of params (%d)", numParams);
			val1 = getArg(script[pos + 1], arg1);
			val2 = getArg(script[pos + 2], arg2);
			debug(9, "[%d/%d] <= [%d/%d]? (%d <= %d)", script[pos + 1], arg1, script[pos + 2], arg2, val1, val2);
			lastResult = (val1 <= val2);
			break;
		case kOpBoolLessThan:
			if (numParams != 2)
				error("kOpBoolLessThan had wrong number of params (%d)", numParams);
			val1 = getArg(script[pos + 1], arg1);
			val2 = getArg(script[pos + 2], arg2);
			debug(9, "[%d/%d] < [%d/%d]? (%d < %d)", script[pos + 1], arg1, script[pos + 2], arg2, val1, val2);
			lastResult = (val1 < val2);
			break;
		case kOpBoolGreaterThanEq:
			if (numParams != 2)
				error("kOpBoolGreaterThanEq had wrong number of params (%d)", numParams);
			val1 = getArg(script[pos + 1], arg1);
			val2 = getArg(script[pos + 2], arg2);
			debug(9, "[%d/%d] >= [%d/%d]? (%d >= %d)", script[pos + 1], arg1, script[pos + 2], arg2, val1, val2);
			lastResult = (val1 >= val2);
			break;
		case kOpBoolGreaterThan:
			if (numParams != 2)
				error("kOpBoolGreaterThan had wrong number of params (%d)", numParams);
			val1 = getArg(script[pos + 1], arg1);
			val2 = getArg(script[pos + 2], arg2);
			debug(9, "[%d/%d] > [%d/%d]? (%d > %d)", script[pos + 1], arg1, script[pos + 2], arg2, val1, val2);
			lastResult = (val1 > val2);
			break;
		case kOpBoolEqual:
			if (numParams != 2)
				error("kOpBoolEqual had wrong number of params (%d)", numParams);
			val1 = getArg(script[pos + 1], arg1);
			val2 = getArg(script[pos + 2], arg2);
			debug(9, "[%d/%d] == [%d/%d]? (%d == %d)", script[pos + 1], arg1, script[pos + 2], arg2, val1, val2);
			lastResult = (val1 == val2);
			break;
		case kOpBoolNotEqual:
			if (numParams != 2)
				error("kOpBoolNotEqual had wrong number of params (%d)", numParams);
			val1 = getArg(script[pos + 1], arg1);
			val2 = getArg(script[pos + 2], arg2);
			debug(9, "[%d/%d] != [%d/%d]? (%d != %d)", script[pos + 1], arg1, script[pos + 2], arg2, val1, val2);
			lastResult = (val1 != val2);
			break;
		case kOpSaveArgs:
			if (numParams != 0)
				error("kOpSaveArgs had wrong number of params (%d)", numParams);
			debug(9, "save args");
			for (uint i = 1; i < 19; i++)
				_stack[stackBase + i] = _vars[i];
			break;
		case kOpRestoreArgs:
			if (numParams != 0)
				error("kOpRestoreArgs had wrong number of params (%d)", numParams);
			debug(9, "restore args");
			for (uint i = 1; i < 19; i++)
				_vars[i] = _stack[stackBase + i];
			break;
		case kOpReturn:
			if (numParams != 1)
				error("kOpReturn had wrong number of params (%d)", numParams);
			val1 = getArg(script[pos + 1], arg1);
			debug(9, "return [%d/%d]=%d", script[pos + 1], arg1, val1);
			_vars[0] = val1;
			break;
		case kOpLessThanEq:
			if (numParams != 3)
				error("kOpLessThanEq had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			val3 = getArg(script[pos + 3], arg3);
			debug(9, "[%d/%d] = [%d/%d] <= [%d/%d]? (%d <= %d)", script[pos + 1], arg1, script[pos + 2], arg2, script[pos + 3], arg3, val3, val2);
			setArg(script[pos + 1], arg1, (val3 <= val2) ? 1 : 0);
			break;
		case kOpLessThan:
			if (numParams != 3)
				error("kOpLessThan had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			val3 = getArg(script[pos + 3], arg3);
			debug(9, "[%d/%d] = [%d/%d] < [%d/%d]? (%d < %d)", script[pos + 1], arg1, script[pos + 2], arg2, script[pos + 3], arg3, val3, val2);
			setArg(script[pos + 1], arg1, (val3 < val2) ? 1 : 0);
			break;
		case kOpGreaterThanEq:
			if (numParams != 3)
				error("kOpGreaterThanEq had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			val3 = getArg(script[pos + 3], arg3);
			debug(9, "[%d/%d] = [%d/%d] >= [%d/%d]? (%d >= %d)", script[pos + 1], arg1, script[pos + 2], arg2, script[pos + 3], arg3, val3, val2);
			setArg(script[pos + 1], arg1, (val3 >= val2) ? 1 : 0);
			break;
		case kOpGreaterThan:
			if (numParams != 3)
				error("kOpGreaterThan had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			val3 = getArg(script[pos + 3], arg3);
			debug(9, "[%d/%d] = [%d/%d] > [%d/%d]? (%d > %d)", script[pos + 1], arg1, script[pos + 2], arg2, script[pos + 3], arg3, val3, val2);
			setArg(script[pos + 1], arg1, (val3 > val2) ? 1 : 0);
			break;
		case kOpEqual:
			if (numParams != 3)
				error("kOpEqual had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			val3 = getArg(script[pos + 3], arg3);
			debug(9, "[%d/%d] = [%d/%d] == [%d/%d]? (%d == %d)", script[pos + 1], arg1, script[pos + 2], arg2, script[pos + 3], arg3, val2, val3);
			setArg(script[pos + 1], arg1, (val3 == val2) ? 1 : 0);
			break;
		case kOpNotEqual:
			if (numParams != 3)
				error("kOpNotEqual had wrong number of params (%d)", numParams);
			val2 = getArg(script[pos + 2], arg2);
			val3 = getArg(script[pos + 3], arg3);
			debug(9, "[%d/%d] = [%d/%d] != [%d/%d]? (%d != %d)", script[pos + 1], arg1, script[pos + 2], arg2, script[pos + 3], arg3, val2, val3);
			setArg(script[pos + 1], arg1, (val3 != val2) ? 1 : 0);
			break;
		case kOpJump:
			if (numParams != 1)
				error("kOpJump had wrong number of params (%d)", numParams);
			val1 = getArg(script[pos + 1], arg1);
			debug(9, "jump by [%d/%d]=%d", script[pos + 1], arg1, val1);
			pos += val1;
			break;
		case kOpJumpIfNot:
			if (numParams != 1)
				error("kOpJumpIfNot had wrong number of params (%d)", numParams);
			if (lastResult)
				break;
			val1 = getArg(script[pos + 1], arg1);
			debug(9, "jump if not, by [%d/%d]=%d", script[pos + 1], arg1, val1);
			pos += val1;
			break;
		case kOpJumpIf:
			if (numParams != 1)
				error("kOpJumpIf had wrong number of params (%d)", numParams);
			if (!lastResult)
				break;
			val1 = getArg(script[pos + 1], arg1);
			debug(9, "jump if, by [%d/%d]=%d", script[pos + 1], arg1, val1);
			pos += val1;
			break;
		case kOpJumpIfNotValue:
			if (numParams != 2)
				error("kOpJumpIfNotValue had wrong number of params (%d)", numParams);
			val1 = getArg(script[pos + 1], arg1);
			val2 = getArg(script[pos + 2], arg2);
			debug(9, "jump if not [%d/%d]=%d", script[pos + 1], arg1, val1);
			if (val1)
				break;
			debug(9, "--> jump by [%d/%d]=%d", script[pos + 2], arg2, val2);
			pos += val2;
			break;
		case kOpJumpIfValue:
			if (numParams != 2)
				error("kOpJumpIfValue had wrong number of params (%d)", numParams);
			val1 = getArg(script[pos + 1], arg1);
			val2 = getArg(script[pos + 2], arg2);
			debug(9, "jump if [%d/%d]=%d", script[pos + 1], arg1, val1);
			if (!val1)
				break;
			debug(9, "--> jump by [%d/%d]=%d", script[pos + 2], arg2, val2);
			pos += val2;
			break;
		default:
			error("unknown script op 0x%02x", op);
		}
		pos += (1 + numParams);

		if (op == kOpReturn)
			break;
	}

	delete[] script;
	_stack.resize(_stack.size() - 19);
}

int16 ComposerEngine::scriptFuncCall(uint16 id, int16 param1, int16 param2, int16 param3) {
	switch (id) {
	case kFuncPlayAnim:
		debug(3, "kFuncPlayAnim(%d, %d, %d)", param1, param2, param3);
		playAnimation(param1, param2, param3, 0);
		return 1; // TODO: return 0 on failure
	case kFuncStopAnim:
		debug(3, "kFuncStopAnim(%d)", param1);
		for (Common::List<Animation *>::iterator i = _anims.begin(); i != _anims.end(); i++) {
			if ((*i)->_id == param1)
				stopAnimation(*i);
		}
		return 0;
	case kFuncQueueScript:
		debug(3, "kFuncQueueScript(%d, %d, %d)", param1, param2, param3);
		_queuedScripts[param1]._baseTime = _system->getMillis();
		_queuedScripts[param1]._duration = 10 * param2;
		_queuedScripts[param1]._count = 0xffffffff;
		_queuedScripts[param1]._scriptId = param3;
		return 0;
	case kFuncDequeueScript:
		debug(3, "kFuncDequeueScript(%d)", param1);
		_queuedScripts[param1]._count = 0;
		_queuedScripts[param1]._scriptId = 0;
		return 0;
	case kFuncSetCursor:
		debug(3, "kSetCursor(%d, (%d, %d))", param1, param2, param3);
		{
		uint16 oldCursor = _mouseSpriteId;
		setCursor(param1, Common::Point(param2, param3));
		return oldCursor;
		}
	case kFuncGetCursor:
		debug(3, "kFuncGetCursor()");
		return _mouseSpriteId;
	case kFuncShowCursor:
		debug(3, "kFuncShowCursor()");
		setCursorVisible(true);
		return 0;
	case kFuncHideCursor:
		debug(3, "kFuncHideCursor()");
		setCursorVisible(false);
		return 0;
	case kFuncActivateButton:
		debug(3, "kFuncActivateButton(%d)", param1);
		for (Common::List<Button>::iterator i = _buttons.begin(); i != _buttons.end(); i++) {
			if (i->_id != param1)
				continue;
			i->_active = true;
		}
		onMouseMove(_lastMousePos);
		return 1;
	case kFuncDeactivateButton:
		debug(3, "kFuncDeactivateButton(%d)", param1);
		for (Common::List<Button>::iterator i = _buttons.begin(); i != _buttons.end(); i++) {
			if (i->_id != param1)
				continue;
			i->_active = false;
		}
		onMouseMove(_lastMousePos);
		return 1;
	case kFuncNewPage:
		debug(3, "kFuncNewPage(%d, %d)", param1, param2);
		_pendingPageChanges.push_back(PendingPageChange(param1, true));
		_pendingPageChanges.push_back(PendingPageChange(param2, false));
		return 1;
	case kFuncLoadPage:
		debug(3, "kFuncLoadPage(%d)", param1);
		_pendingPageChanges.push_back(PendingPageChange(param1, false));
		return 1;
	case kFuncUnloadPage:
		debug(3, "ignoring kFuncUnloadPage(%d)", param1);
		_pendingPageChanges.push_back(PendingPageChange(param1, true));
		return 1;
	case kFuncSetPalette:
		// TODO: return 0 if not disabling (0) and doesn't exist
		debug(4, "kFuncSetPalette(%d, %d)", param1, param2);
		loadCTBL(param1, param2);
		// TODO: incomplete?
		return 1;
	case kFuncSaveVars:
		debug(3, "kFuncSaveVars(%d)", param1);
		{
		Common::String filename = _targetName + Common::String::format(".%03d", param1);
		Common::WriteStream *stream = _saveFileMan->openForSaving(filename);
		for (uint i = 0; i < 1000; i++) {
			stream->writeUint16LE(_vars[i]);
		}
		delete stream;
		}
		return 1;
	case kFuncLoadVars:
		debug(3, "kFuncLoadVars(%d, %d, %d)", param1, param2, param3);
		{
		Common::String filename = _targetName + Common::String::format(".%03d", param1);
		Common::SeekableReadStream *stream = _saveFileMan->openForLoading(filename);
		if (!stream) {
			if (!_bookIni.hasKey(Common::String::format("%d", param1), "Data"))
				return 0;
			filename = getFilename("Data", param1);
			Common::File *file = new Common::File();
			if (!file->open(filename))
				error("couldn't open '%s' to get vars id '%d'", filename.c_str(), param1);
			stream = file;
		}
		if (param3 == 0)
			param3 = 1000;
		else
			param3 = param3;
		if (param2 < 0 || param3 < 0 || param2 + param3 > 1000)
			error("can't read %d entries into %d from file '%s' for vars id '%d'", param3, param2, filename.c_str(), param1);
		stream->skip(param2 * 2);
		for (uint i = 0; i < (uint)param3; i++) {
			if (stream->pos() + 1 > stream->size())
				break;
			_vars[param2 + i] = stream->readUint16LE();
		}
		delete stream;
		}
		return 1;
	case kFuncQueueScriptOnce:
		debug(3, "kFuncQueueScriptOnce(%d, %d, %d)", param1, param2, param3);
		_queuedScripts[param1]._baseTime = _system->getMillis();
		_queuedScripts[param1]._duration = 10 * param2;
		_queuedScripts[param1]._count = 1;
		_queuedScripts[param1]._scriptId = param3;
		return 0;
	case kFuncGetMousePos:
		// TODO
		warning("ignoring kFuncGetMousePos(%d, %d)", param1, param2);
		return 0;
	case kFuncChangeBackground:
		// TODO
		warning("ignoring kFuncChangeBackground(%d)", param1);
		// TODO: return 1 if background existed, else 0
		return 0;
	case kFuncSetBackgroundColor:
		// TODO
		warning("ignoring kFuncSetBackgroundColor(%d)", param1);
		return 0;
	case kFuncClearSprites:
		// TODO
		warning("ignoring kFuncClearSprites()");
		return 0;
	case kFuncAddSprite:
		{
		Common::Point pos(_vars[param3], _vars[param3 + 1]);
		int16 zorder = _vars[param3 + 2];
		debug(3, "kFuncAddSprite(%d, %d, [%d = (%d, %d), %d])", param1, param2, param3, pos.x, pos.y, zorder);
		addSprite(param1, param2, zorder, pos);
		}
		return 0;
	case kFuncRemoveSprite:
		debug(3, "kFuncRemoveSprite(%d, %d)", param1, param2);
		removeSprite(param1, param2);
		return 0;
	case kFuncQuit:
		// TODO
		warning("ignoring kFuncQuit()");
		return 0;
	case kFuncSaveData:
		// TODO
		warning("ignoring kFuncSaveData(%d, %d, %d)", param1, param2, param3);
		return 1;
	case kFuncLoadData:
		debug(3, "kFuncLoadData(%d, %d, %d)", param1, param2, param3);
		{
		Common::String filename = getFilename("Data", param1);
		Common::File *file = new Common::File();
		if (!file->open(filename))
			error("couldn't open '%s' to get data id '%d'", filename.c_str(), param1);
		if (param3 == 0)
			param3 = 1000;
		else
			param3 = param3;
		if (param2 < 0 || param3 < 0 || param2 + param3 > 1000)
			error("can't read %d entries into %d from file '%s' for data id '%d'", param3, param2, filename.c_str(), param1);
		for (uint i = 0; i < (uint)param3; i++) {
			if (file->pos() + 1 > file->size())
				break;
			_vars[param2 + i] = file->readUint16LE();
		}
		delete file;
		}
		return 1;
	case kFuncGetSpriteSize:
		debug(3, "kFuncGetSpriteSize(%d, %d, %d)", param1, param2, param3);
		int16 width, height;
		width = 0;
		height = 0;
		{
		Common::SeekableReadStream *stream = getStreamForSprite(param1);
		if (stream) {
			stream->readUint16LE();
			height = stream->readSint16LE();
			width = stream->readSint16LE();
			delete stream;
		}
		}
		_vars[param2] = width;
		_vars[param3] = height;
		return 0;
	default:
		error("unknown scriptFuncCall %d(%d, %d, %d)", (uint32)id, param1, param2, param3);
	}
}

} // End of namespace Composer