/* ScummVM Tools
 *
 * ScummVM Tools 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.
 */

#include "codegen.h"

std::ostream &Scumm::v6::ListValue::print(std::ostream &output) const {
	output << "[";
	for (ValueList::const_iterator i = _items.begin(); i != _items.end(); ++i) {
		if (i != _items.begin())
			output << ", ";
		output << *i;
	}
	output << "]";
	return output;
}

ValuePtr Scumm::v6::Scummv6CodeGenerator::createListValue() {
	ValueList list;
	ValuePtr countValue = _stack.pop();
	std::stringstream s;
	s << countValue;
	int count = atoi(s.str().c_str());
	for (int i = 0; i < count; i++) {
		list.push_front(_stack.pop());
	}
	return new ListValue(list);
}

const char *var_names[] = {
	/* 0 */
	NULL,
	"VAR_EGO",
	"VAR_CAMERA_POS_X",
	"VAR_HAVE_MSG",
	/* 4 */
	"VAR_ROOM",
	"VAR_OVERRIDE",
	"VAR_MACHINE_SPEED",
	NULL,
	/* 8 */
	"VAR_NUM_ACTOR",
	"VAR_V6_SOUNDMODE",
	"VAR_CURRENTDRIVE",
	"VAR_TMR_1",
	/* 12 */
	"VAR_TMR_2",
	"VAR_TMR_3",
	NULL,
	NULL,
	/* 16 */
	NULL,
	"VAR_CAMERA_MIN_X",
	"VAR_CAMERA_MAX_X",
	"VAR_TIMER_NEXT",
	/* 20 */
	"VAR_VIRT_MOUSE_X",
	"VAR_VIRT_MOUSE_Y",
	"VAR_ROOM_RESOURCE",
	"VAR_LAST_SOUND",
	/* 24 */
	"VAR_CUTSCENEEXIT_KEY",
	"VAR_TALK_ACTOR",
	"VAR_CAMERA_FAST_X",
	"VAR_SCROLL_SCRIPT",
	/* 28 */
	"VAR_ENTRY_SCRIPT",
	"VAR_ENTRY_SCRIPT2",
	"VAR_EXIT_SCRIPT",
	"VAR_EXIT_SCRIPT2",
	/* 32 */
	"VAR_VERB_SCRIPT",
	"VAR_SENTENCE_SCRIPT",
	"VAR_INVENTORY_SCRIPT",
	"VAR_CUTSCENE_START_SCRIPT",
	/* 36 */
	"VAR_CUTSCENE_END_SCRIPT",
	"VAR_CHARINC",
	"VAR_WALKTO_OBJ",
	"VAR_DEBUGMODE",
	/* 40 */
	"VAR_HEAPSPACE",
	"VAR_ROOM_WIDTH",
	"VAR_RESTART_KEY",
	"VAR_PAUSE_KEY",
	/* 44 */
	"VAR_MOUSE_X",
	"VAR_MOUSE_Y",
	"VAR_TIMER",
	"VAR_TMR_4",
	/* 48 */
	NULL,
	"VAR_VIDEOMODE",
	"VAR_MAINMENU_KEY",
	"VAR_FIXEDDISK",
	/* 52 */
	"VAR_CURSORSTATE",
	"VAR_USERPUT",
	"VAR_ROOM_HEIGHT",
	NULL,
	/* 56 */
	"VAR_SOUNDRESULT",
	"VAR_TALKSTOP_KEY",
	NULL,
	"VAR_FADE_DELAY",
	/* 60 */
	"VAR_NOSUBTITLES",
	"VAR_SAVELOAD_SCRIPT",
	"VAR_SAVELOAD_SCRIPT2",
	NULL,
	/* 64 */
	"VAR_SOUNDPARAM",
	"VAR_SOUNDPARAM2",
	"VAR_SOUNDPARAM3",
	"VAR_INPUTMODE",
	/* 68 */
	"VAR_MEMORY_PERFORMANCE",
	"VAR_VIDEO_PERFORMANCE",
	"VAR_ROOM_FLAG",
	"VAR_GAME_LOADED",
	/* 72 */
	"VAR_NEW_ROOM",
	NULL,
	"VAR_LEFTBTN_DOWN",
	"VAR_RIGHTBTN_DOWN",
	/* 76 */
	"VAR_V6_EMSSPACE",
	NULL,
	NULL,
	NULL,
	/* 80 */
	NULL,
	NULL,
	NULL,
	NULL,
	/* 84 */
	NULL,
	NULL,
	NULL,
	NULL,
	/* 88 */
	NULL,
	NULL,
	"VAR_GAME_DISK_MSG",
	"VAR_OPEN_FAILED_MSG",
	/* 92 */
	"VAR_READ_ERROR_MSG",
	"VAR_PAUSE_MSG",
	"VAR_RESTART_MSG",
	"VAR_QUIT_MSG",
	/* 96 */
	"VAR_SAVE_BTN",
	"VAR_LOAD_BTN",
	"VAR_PLAY_BTN",
	"VAR_CANCEL_BTN",
	/* 100 */
	"VAR_QUIT_BTN",
	"VAR_OK_BTN",
	"VAR_SAVE_DISK_MSG",
	"VAR_ENTER_NAME_MSG",
	/* 104 */
	"VAR_NOT_SAVED_MSG",
	"VAR_NOT_LOADED_MSG",
	"VAR_SAVE_MSG",
	"VAR_LOAD_MSG",
	/* 108 */
	"VAR_SAVE_MENU_TITLE",
	"VAR_LOAD_MENU_TITLE",
	"VAR_GUI_COLORS",
	"VAR_DEBUG_PASSWORD",
	/* 112 */
	NULL,
	NULL,
	NULL,
	NULL,
	/* 116 */
	NULL,
	"VAR_MAIN_MENU_TITLE",
	"VAR_RANDOM_NR",
	"VAR_TIMEDATE_YEAR",
	/* 120 */
	NULL,
	"VAR_GAME_VERSION",
	NULL,
	"VAR_CHARSET_MASK",
	/* 124 */
	NULL,
	"VAR_TIMEDATE_HOUR",
	"VAR_TIMEDATE_MINUTE",
	NULL,
	/* 128 */
	"VAR_TIMEDATE_DAY",
	"VAR_TIMEDATE_MONTH",
	NULL,
	NULL,
};

const char *Scumm::v6::Scummv6CodeGenerator::getVarName(uint16 varID) {
	if (varID >= sizeof(var_names) / sizeof(var_names[0]))
		return NULL;
	return var_names[varID];
}

std::string Scumm::v6::Scummv6CodeGenerator::decodeVarName(uint16 varID) {
	std::stringstream s;
	if (!(varID & 0xF000)) {
		uint16 var = varID & 0xFFF;
		const char* varName = getVarName(var);
		if (varName	 != NULL)
			return varName;
		else
			s << boost::format("var%d") % (varID & 0xFFF);
	} else if (varID & 0x8000) {
		s << boost::format("bitvar%d") % (varID & 0x7FFF);
	} else if (varID & 0x4000) {
		s << boost::format("localvar%d") % (varID & 0xFFF);
	} else {
		s << boost::format("?var?%d") % varID;
	}
	return s.str();
}

std::string Scumm::v6::Scummv6CodeGenerator::decodeArrayName(uint16 arrID) {
	std::stringstream s;
	const char *varName;
	if (!(arrID & 0xF000) && (varName = getVarName(arrID & 0xFFF)) != NULL)
		return varName;
	s << boost::format("array%d") % arrID;
	return s.str();
}

void Scumm::v6::Scummv6CodeGenerator::processSpecialMetadata(const InstPtr inst, char c, int pos) {
	switch (c) {
	// All of these meanings are taken from descumm.
	case 'l':
		addArg(createListValue());
		break;
	// No SCUMMv6 opcodes using these types have more than one parameter, so it's safe to assume it's the first parameter we want.
	case 'w':
	case 'j':
	case 'i':
		addArg(inst->_params[0]);
	case 'v':
		addArg(new VarValue(decodeVarName(static_cast<uint16>(inst->_params[0]->getUnsigned()))));
		break;
	case 's':
		addArg(inst->_params[0]);
		break;
	case 'z':
		addArg(_stack.pop());
		addArg(_stack.pop());
		break;
	default:
		CodeGenerator::processSpecialMetadata(inst, c, pos);
		break;
	}
}