/* 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 "mohawk/myst.h"
#include "mohawk/graphics.h"
#include "mohawk/myst_areas.h"
#include "mohawk/myst_state.h"
#include "mohawk/sound.h"
#include "mohawk/video.h"
#include "mohawk/myst_stacks/channelwood.h"

#include "gui/message.h"

namespace Mohawk {

MystScriptParser_Channelwood::MystScriptParser_Channelwood(MohawkEngine_Myst *vm) :
		MystScriptParser(vm), _state(vm->_gameState->_channelwood) {
	setupOpcodes();
}

MystScriptParser_Channelwood::~MystScriptParser_Channelwood() {
}

#define OPCODE(op, x) _opcodes.push_back(new MystOpcode(op, (OpcodeProcMyst) &MystScriptParser_Channelwood::x, #x))

void MystScriptParser_Channelwood::setupOpcodes() {
	// "Stack-Specific" Opcodes
	OPCODE(101, opcode_101);
	OPCODE(102, opcode_102);
	OPCODE(104, opcode_104);
	OPCODE(117, opcode_117);
	OPCODE(118, opcode_118);
	OPCODE(119, opcode_119);
	OPCODE(122, opcode_122);
	OPCODE(127, opcode_127);
	OPCODE(129, opcode_129);

	// "Init" Opcodes
	OPCODE(201, opcode_201);
	OPCODE(202, opcode_202);
	OPCODE(203, opcode_203);

	// "Exit" Opcodes
	OPCODE(300, opcode_300);
}

#undef OPCODE

void MystScriptParser_Channelwood::disablePersistentScripts() {
	opcode_202_disable();
	opcode_203_disable();
}

void MystScriptParser_Channelwood::runPersistentScripts() {
	opcode_202_run();
	opcode_203_run();
}

uint16 MystScriptParser_Channelwood::getVar(uint16 var) {
	switch(var) {
	case 1: // Water Pump Bridge Raised
		return _state.waterPumpBridgeState;
	case 2: // Lower Walkway to Upper Walkway Elevator Raised
		return _state.elevatorState;
	case 3: // Water Flowing To Lower Walkway To Upper Walkway Elevator
		return (_state.waterValveStates & 0xc0) ? 1 : 0;
	case 4: // Water Flowing To Book Room Elevator
		return ((_state.waterValveStates & 0xf8) == 0xb0 && _state.pipeState) ? 1 : 0;
	case 5: // Lower Walkway to Upper Walkway Spiral Stair Lower Door State
		return _state.stairsLowerDoorState;
	case 6: // Pipe Bridge Extended
		return _state.pipeState;
	case 7: // Water Flowing To Water Pump For Bridge
		return ((_state.waterValveStates & 0xe2) == 0xc2 || (_state.waterValveStates & 0xf4) == 0xa0) ? 1 : 0;
	case 8: // Water Tank Valve
		return (_state.waterValveStates & 0x80) ? 1 : 0;
	case 9: // State of First Water Valve
		return (_state.waterValveStates & 0x40) ? 1 : 0;
	case 10: // State of Second Water Valve
		return (_state.waterValveStates & 0x20) ? 1 : 0;
	case 11: // State of Right Third Water Valve
		return (_state.waterValveStates & 0x10) ? 1 : 0;
	case 12: // State of Right-Right Fourth Water Valve
		return (_state.waterValveStates & 0x08) ? 1 : 0;
	case 13: // State of Right-Left Fourth Water Valve
		return (_state.waterValveStates & 0x04) ? 1 : 0;
	case 14: // State of Left Third Water Valve
		return (_state.waterValveStates & 0x02) ? 1 : 0;
	case 15: // Water Flowing To Lower Walkway To Upper Walkway Elevator
		return ((_state.waterValveStates & 0xf8) == 0xb8) ? 1 : 0;
	case 16: // Channelwood Lower Walkway to Upper Walkway Spiral Stair Upper Door State
		return _state.stairsUpperDoorState;
	case 17: // Achenar's Holoprojector Selection
		return _state.holoprojectorSelection;
//	case 18: // Sirrus's Room Bed Drawer Open
//		return 0;
//		return 1;
	case 19: // Sound - Water Tank Valve
		return (_state.waterValveStates & 0x80) ? 1 : 0;
	case 20: // Sound - First Water Valve Water Flowing To Left
		return ((_state.waterValveStates & 0xc0) == 0x80) ? 1 : 0;
	case 21: // Sound - Second Water Valve Water Flowing To Right
		return ((_state.waterValveStates & 0xe0) == 0xa0) ? 1 : 0;
	case 22: // Sound - Right Third Water Valve Water Flowing To Right
		return ((_state.waterValveStates & 0xf0) == 0xb0) ? 1 : 0;
	case 23: // Sound - Right Third Water Valve Water Flowing To Left
		return ((_state.waterValveStates & 0xf0) == 0xa0) ? 1 : 0;
	case 24: // Sound - Second Water Valve Water Flowing To Left
		return ((_state.waterValveStates & 0xe0) == 0xc0) ? 1 : 0;
	case 25: // Sound - Right-Right Fourth Valve Water Flowing To Left (To Pipe Bridge)
		return ((_state.waterValveStates & 0xf8) == 0xb0) ? 1 : 0;
	case 26: // Sound - Right-Left Fourth Valve Water Flowing To Right (To Pipe Down Tree)
		return ((_state.waterValveStates & 0xf4) == 0xa4) ? 1 : 0;
	case 27: // Sound - Right-Left Fourth Valve Water Flowing To Left (To Pipe Fork)
		return ((_state.waterValveStates & 0xf4) == 0xa0) ? 1 : 0;
	case 28: // Sound - Left Third Water Valve Flowing To Right (To Pipe Fork)
		return ((_state.waterValveStates & 0xe2) == 0xc2) ? 1 : 0;
	case 29: // Sound - Left Third Water Valve Flowing To Left (To Pipe In Water)
		return ((_state.waterValveStates & 0xe2) == 0xc0) ? 1 : 0;
//	case 30: // Temple Door State
//		return 0;
//		return 1;
	case 32: // Sound - Water Flowing in Pipe to Book Room Elevator
		return ((_state.waterValveStates & 0xf8) == 0xb0 && _state.pipeState) ? 1 : 0;
//	case 102: // Sirrus's Desk Drawer / Red Page State
//		return 0; // Drawer Closed
//		return 1; // Drawer Open, Red Page Taken
//		return 2; // Drawer Open, Red Page Present
//	case 103: // Blue Page Present
//		return 0; // Blue Page Taken
//		return 1; // Blue Page Present
	default:
		return MystScriptParser::getVar(var);
	}
}

void MystScriptParser_Channelwood::toggleVar(uint16 var) {
	switch(var) {
	case 6: // Pipe Bridge Extended
		_state.pipeState ^= 1;
	default:
		MystScriptParser::toggleVar(var);
		break;
	}
}

bool MystScriptParser_Channelwood::setVarValue(uint16 var, uint16 value) {
	bool refresh = false;

	switch (var) {
//	case 18: // Sirrus's Room Bed Drawer Open
//	temp ^= 1;
	default:
		refresh = MystScriptParser::setVarValue(var, value);
		break;
	}

	return refresh;
}

void MystScriptParser_Channelwood::opcode_101(uint16 op, uint16 var, uint16 argc, uint16 *argv) {
	varUnusedCheck(op, var);

	if (argc == 1) {
		debugC(kDebugScript, "Opcode %d: Play Pipe Movie and Sound", op);

		uint16 soundId = argv[0];
		debugC(kDebugScript, "\tsoundId: %d", soundId);

		_vm->_sound->replaceSound(soundId);

		// TODO: Get Movie Location from Invoking Resource Rect, rather than
		//       hardcoded 267, 170 ?

		// TODO: Need version of playMovie blocking which allows selection
		//       of start and finish points.
		if (!_vm->_varStore->getVar(6)) {
			// Play Pipe Extending i.e. 0 to 1/2 way through file
			_vm->_video->playMovie(_vm->wrapMovieFilename("pipebrid", kChannelwoodStack), 267, 170);
		} else {
			// Play Pipe Retracting i.e. 1/2 way to end of file
			_vm->_video->playMovie(_vm->wrapMovieFilename("pipebrid", kChannelwoodStack), 267, 170);
		}
	} else
		unknown(op, var, argc, argv);
}

void MystScriptParser_Channelwood::opcode_102(uint16 op, uint16 var, uint16 argc, uint16 *argv) {
	varUnusedCheck(op, var);

	if (argc == 2 || argc == 3) {
		debugC(kDebugScript, "Opcode %d: Draw Full Screen Image, Optional Delay and Change Card", op);

		uint16 imageId = argv[0];
		uint16 cardId = argv[1];
		uint16 delay = 0;

		if (argc == 3)
			delay = argv[2]; // TODO: Not sure about purpose of this parameter...

		debugC(kDebugScript, "\timageId: %d", imageId);
		debugC(kDebugScript, "\tcardId: %d", cardId);
		debugC(kDebugScript, "\tdelay: %d", delay);

		_vm->_gfx->copyImageToScreen(imageId, Common::Rect(0, 0, 544, 333));
		_vm->_system->delayMillis(delay / 100);
		_vm->changeToCard(cardId, true);
	} else
		unknown(op, var, argc, argv);
}


void MystScriptParser_Channelwood::opcode_104(uint16 op, uint16 var, uint16 argc, uint16 *argv) {
	varUnusedCheck(op, var);

	// Used on Channelwood Card 3280
	if (argc == 0) {
		debugC(kDebugScript, "Opcode %d: Do Water Tank Valve Open Animation", op);
		Common::Rect rect = _invokingResource->getRect();

		// TODO: Need to load the image ids from Script Resources structure of VIEW
		for (uint16 imageId = 3595; imageId <= 3601; imageId++) {
			_vm->_gfx->copyImageToScreen(imageId, rect);
			_vm->_system->delayMillis(50);
		}

		// TODO: Is 8 gotten from var7 of calling hotspot, rather than hardcoded?
		_vm->_varStore->setVar(8, 1);
		_vm->_varStore->setVar(19, 1);
	} else
		unknown(op, var, argc, argv);
}

void MystScriptParser_Channelwood::opcode_117(uint16 op, uint16 var, uint16 argc, uint16 *argv) {
	varUnusedCheck(op, var);

	if (argc == 1) {
		// Used on Card 3012 (Temple Hologram Monitor)
		uint16 button = argv[0]; // 0 to 3
		_vm->_varStore->setVar(17, button);

		switch (button) {
		case 0:
			_vm->_video->playMovie(_vm->wrapMovieFilename("monalgh", kChannelwoodStack), 227, 71);
			break;
		case 1:
			_vm->_video->playMovie(_vm->wrapMovieFilename("monamth", kChannelwoodStack), 227, 71);
			break;
		case 2:
			_vm->_video->playMovie(_vm->wrapMovieFilename("monasirs", kChannelwoodStack), 227, 71);
			break;
		case 3:
			_vm->_video->playMovie(_vm->wrapMovieFilename("monsmsg", kChannelwoodStack), 227, 71);
			break;
		default:
			warning("Opcode %d Control Variable Out of Range", op);
			break;
		}
	} else
		unknown(op, var, argc, argv);
}

void MystScriptParser_Channelwood::opcode_118(uint16 op, uint16 var, uint16 argc, uint16 *argv) {
	varUnusedCheck(op, var);

	if (argc == 0) {
		// Used on Card 3318 (Sirrus' Room Nightstand Drawer)
		// Triggered when clicked on drawer
		// TODO: Implement function...
	} else
		unknown(op, var, argc, argv);
}

void MystScriptParser_Channelwood::opcode_119(uint16 op, uint16 var, uint16 argc, uint16 *argv) {
	varUnusedCheck(op, var);

	if (argc == 0) {
		// Used on Card 3333 (Temple Hologram)
		// TODO: Not 100% sure about movie position...
		switch (_vm->_varStore->getVar(17)) {
		case 0:
			_vm->_video->playMovie(_vm->wrapMovieFilename("holoalgh", kChannelwoodStack), 126, 74);
			break;
		case 1:
			_vm->_video->playMovie(_vm->wrapMovieFilename("holoamth", kChannelwoodStack), 126, 74);
			break;
		case 2:
			_vm->_video->playMovie(_vm->wrapMovieFilename("holoasir", kChannelwoodStack), 126, 74);
			break;
		case 3:
			_vm->_video->playMovie(_vm->wrapMovieFilename("holosmsg", kChannelwoodStack), 126, 74);
			break;
		default:
			warning("Opcode %d Control Variable Out of Range", op);
			break;
		}
	} else
		unknown(op, var, argc, argv);
}

void MystScriptParser_Channelwood::opcode_122(uint16 op, uint16 var, uint16 argc, uint16 *argv) {
	varUnusedCheck(op, var);

	// Used on Channelwood Card 3280
	if (argc == 0) {
		debugC(kDebugScript, "Opcode %d: Do Water Tank Valve Close Animation", op);
		Common::Rect rect = _invokingResource->getRect();

		// TODO: Need to load the image ids from Script Resources structure of VIEW
		for (uint16 imageId = 3601; imageId >= 3595; imageId--) {
			_vm->_gfx->copyImageToScreen(imageId, rect);
			_vm->_system->delayMillis(50);
		}

		// TODO: Is 8 gotten from var7 of calling hotspot, rather than hard-coded?
		_vm->_varStore->setVar(8, 0);
		_vm->_varStore->setVar(19, 0);
	} else
		unknown(op, var, argc, argv);
}

void MystScriptParser_Channelwood::opcode_127(uint16 op, uint16 var, uint16 argc, uint16 *argv) {
	varUnusedCheck(op, var);

	if (argc == 2) {
		// Used by Card 3262 (Elevator)
		debugC(kDebugScript, "Opcode %d: Unknown...", op);

		uint16 u0 = argv[0];
		uint16 u1 = argv[1];

		debugC(kDebugScript, "\tu0: %d", u0);
		debugC(kDebugScript, "\tu1: %d", u1);

		// TODO: Fill in Code...
	} else
		unknown(op, var, argc, argv);
}

void MystScriptParser_Channelwood::opcode_129(uint16 op, uint16 var, uint16 argc, uint16 *argv) {
	varUnusedCheck(op, var);

	if (argc == 1) {
		// Used by Card 3262 (Elevator)
		debugC(kDebugScript, "Opcode %d: Unknown...", op);

		uint16 cardId = argv[0];

		debugC(kDebugScript, "\tcardId: %d", cardId);

		// TODO: Fill in Code...
		_vm->changeToCard(cardId, true);
	} else
		unknown(op, var, argc, argv);
}

void MystScriptParser_Channelwood::opcode_201(uint16 op, uint16 var, uint16 argc, uint16 *argv) {
	// Used for Card 3247 (Elevator #1 Movement), 3161 (Bridge Movement), 3259 (Elevator #3 Movement) and 3252 (Elevator #2 Movement)
	if (argc == 0) {
		// TODO: Fill in Function. Video Playback? Rect from invoking hotspot resource...
		if (false) {
			// Card 3161
			_vm->_video->playMovie(_vm->wrapMovieFilename("bridge", kChannelwoodStack), 292, 204);

			// Card 3247
			_vm->_video->playMovie(_vm->wrapMovieFilename("welev1dn", kChannelwoodStack), 214, 107);
			_vm->_video->playMovie(_vm->wrapMovieFilename("welev1up", kChannelwoodStack), 214, 107);

			// Card 3252
			_vm->_video->playMovie(_vm->wrapMovieFilename("welev2dn", kChannelwoodStack), 215, 118);
			_vm->_video->playMovie(_vm->wrapMovieFilename("welev2up", kChannelwoodStack), 215, 118);

			// Card 3259
			_vm->_video->playMovie(_vm->wrapMovieFilename("welev3dn", kChannelwoodStack), 213, 99);
			_vm->_video->playMovie(_vm->wrapMovieFilename("welev3up", kChannelwoodStack), 213, 99);
		}
	} else
		unknown(op, var, argc, argv);
}

static struct {
	bool enabled;
	uint16 var;
} g_opcode202Parameters;

void MystScriptParser_Channelwood::opcode_202_run(void) {
	if (g_opcode202Parameters.enabled) {
		// Used for Cards 3328, 3691, 3731, 3809, 3846 etc. (Water Valves)

		// Code for Water Flow Logic
		// Var 8 = "Water Tank Valve State"
		// Controls
		// Var 19 = "Water Flowing to First Water Valve"
		// Code for this in Opcode 104 / 122

		// Var 19 = "Water Flowing to First Water Valve"
		// and
		// Var 9 = "First Water Valve State"
		// Controls
		// Var 20 = "Water Flowing to Second (L) Water Valve"
		// Var 3 = "Water Flowing (R) to Pump for Upper Walkway to Temple Elevator"
		uint16 var9 = _vm->_varStore->getVar(9);
		if (_vm->_varStore->getVar(19)) {
			_vm->_varStore->setVar(20, !var9);
			_vm->_varStore->setVar(3, var9);
		} else {
			// No water into Valve
			_vm->_varStore->setVar(20, 0);
			_vm->_varStore->setVar(3, 0);
		}

		// Var 20 = "Water Flowing to Second (L) Water Valve"
		// and
		// Var 10 = "Second (L) Water Valve State"
		// Controls
		// Var 24 = "Water Flowing to Third (L, L) Water Valve"
		// Var 21 = "Water Flowing to Third (L, R) Water Valve"
		uint16 var10 = _vm->_varStore->getVar(10);
		if (_vm->_varStore->getVar(20)) {
			_vm->_varStore->setVar(24, !var10);
			_vm->_varStore->setVar(21, var10);
		} else {
			// No water into Valve
			_vm->_varStore->setVar(24, 0);
			_vm->_varStore->setVar(21, 0);
		}

		// Var 21 = "Water Flowing to Third (L, R) Water Valve"
		// and
		// Var 11 = "Third (L, R) Water Valve State"
		// Controls
		// Var 23 = "Water Flowing to Fourth (L, R, L) Water Valve"
		// Var 22 = "Water Flowing to Fourth (L, R, R) Water Valve"
		uint16 var11 = _vm->_varStore->getVar(11);
		if (_vm->_varStore->getVar(21)) {
			_vm->_varStore->setVar(23, !var11);
			_vm->_varStore->setVar(22, var11);
		} else {
			// No water into Valve
			_vm->_varStore->setVar(23, 0);
			_vm->_varStore->setVar(22, 0);
		}

		// Var 24 = "Water Flowing to Third (L, L) Water Valve"
		// and
		// Var 14 = "Third (L, L) Water Valve State"
		// Controls
		// Var 29 = "Water Flowing to Pipe In Water (L, L, L)"
		// Var 28 = "Water Flowing to Join and Pump Bridge (L, L, R)"
		uint16 var14 = _vm->_varStore->getVar(14);
		if (_vm->_varStore->getVar(24)) {
			_vm->_varStore->setVar(29, !var14);
			_vm->_varStore->setVar(28, var14);
		} else {
			// No water into Valve
			_vm->_varStore->setVar(29, 0);
			_vm->_varStore->setVar(28, 0);
		}

		// Var 22 = "Water Flowing to Fourth (L, R, R) Water Valve"
		// and
		// Var 12 = "Fourth (L, R, R) Water Valve State"
		// Controls
		// Var 25 = "Water Flowing to Pipe Bridge (L, R, R, L)"
		// Var 15 = "Water Flowing (L, R, R, R) to Pump for Lower Walkway to Upper Walkway Elevator"
		uint16 var12 = _vm->_varStore->getVar(12);
		if (_vm->_varStore->getVar(22)) {
			_vm->_varStore->setVar(25, !var12);
			_vm->_varStore->setVar(15, var12);
		} else {
			// No water into Valve
			_vm->_varStore->setVar(25, 0);
			_vm->_varStore->setVar(15, 0);
		}

		// Var 23 = "Water Flowing to Fourth (L, R, L) Water Valve"
		// and
		// Var 13 = "Fourth (L, R, L) Water Valve State"
		// Controls
		// Var 27 = "Water Flowing to Join and Pump Bridge (L, R, L, L)"
		// Var 26 = "Water Flowing to Pipe At Entry Point (L, R, L, R)"
		uint16 var13 = _vm->_varStore->getVar(13);
		if (_vm->_varStore->getVar(23)) {
			_vm->_varStore->setVar(27, !var13);
			_vm->_varStore->setVar(26, var13);
		} else {
			// No water into Valve
			_vm->_varStore->setVar(27, 0);
			_vm->_varStore->setVar(26, 0);
		}

		// TODO: Not sure that original had OR logic for water flow at Join...
		// Var 27 = "Water Flowing to Join and Pump Bridge (L, R, L, L)"
		// Or
		// Var 28 = "Water Flowing to Join and Pump Bridge (L, L, R)"
		// Controls
		// Var 31 = "Water Flowing to Join (L, L, R)" // 0 to 2 = Stop Sound, Background, Background with Water Flow
		// Var 7 = "Bridge Pump Running"
		// TODO: Not sure about control of Var 31 which is tristate...
		if (_vm->_varStore->getVar(27) || _vm->_varStore->getVar(28)) {
			_vm->_varStore->setVar(31, 2); // Background with Water Flow
			_vm->_varStore->setVar(7, 1);
		} else {
			// No water into Valve
			_vm->_varStore->setVar(31, 1); // Background
			_vm->_varStore->setVar(7, 0);
		}

		// TODO: Code for this shouldn't be here...
		//       Move to Opcodes called by Pipe Extension...
		// Var 25 = "Water Flowing to Pipe Bridge (L, R, R, L)"
		// and
		// Var 6 = "Pipe Bridge Extended"
		// Controls
		// Var 32 = "Water Flowing (L, R, R, L, Pipe) State" }, // 0 to 2 = Stop Sound, Background, Background with Water Flow
		// Var 4 = "Water Flowing (L, R, R, L, Pipe Extended) to Pump for Book Room Elevator"
		// TODO: Not sure about control of Var 32 which is tristate...
		if (_vm->_varStore->getVar(25) && _vm->_varStore->getVar(6)) {
			_vm->_varStore->setVar(32, 2); // Background with Water Flow
			_vm->_varStore->setVar(4, 1);
		} else {
			// No water into Valve
			_vm->_varStore->setVar(32, 1); // Background
			_vm->_varStore->setVar(4, 0);
		}
	}
}

void MystScriptParser_Channelwood::opcode_202_disable(void) {
	g_opcode202Parameters.enabled = false;
}

void MystScriptParser_Channelwood::opcode_202(uint16 op, uint16 var, uint16 argc, uint16 *argv) {
	// Used for Cards 3328, 3691, 3731, 3809, 3846 etc. (Water Valves)
	if (argc == 0) {
		g_opcode202Parameters.var = var;
		g_opcode202Parameters.enabled = true;
	} else
		unknown(op, var, argc, argv);
}

static struct {
	bool enabled;
} g_opcode203Parameters;

void MystScriptParser_Channelwood::opcode_203_run(void) {
	if (g_opcode203Parameters.enabled) {
		// Used for Card 3310 (Sirrus' Room Right Bed Drawer),
		// Card 3307 (Sirrus' Room Left Bed Drawer)
		// and Card 3318 (Sirrus' Room Nightstand Drawer)
		// TODO: Fill in Logic...
	}
}

void MystScriptParser_Channelwood::opcode_203_disable(void) {
	g_opcode203Parameters.enabled = false;
}

void MystScriptParser_Channelwood::opcode_203(uint16 op, uint16 var, uint16 argc, uint16 *argv) {
	varUnusedCheck(op, var);

	// Used for Card 3310 (Sirrus' Room Right Bed Drawer),
	// Card 3307 (Sirrus' Room Left Bed Drawer)
	// and Card 3318 (Sirrus' Room Nightstand Drawer)
	if (argc == 0)
		g_opcode203Parameters.enabled = true;
	else
		unknown(op, var, argc, argv);
}

void MystScriptParser_Channelwood::opcode_300(uint16 op, uint16 var, uint16 argc, uint16 *argv) {
	// Used in Card 3012 (Achenar's Holoprojector Control)
	varUnusedCheck(op, var);
	// TODO: Fill in Logic. Clearing Variable for View?
}

} // End of namespace Mohawk