/*
**	Command & Conquer Generals(tm)
**	Copyright 2025 Electronic Arts Inc.
**
**	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/>.
*/

////////////////////////////////////////////////////////////////////////////////
//																																						//
//  (c) 2001-2003 Electronic Arts Inc.																				//
//																																						//
////////////////////////////////////////////////////////////////////////////////

// AI.cpp
// The Artificial Intelligence system
// Author: Michael S. Booth, November 2000
#include "PreRTS.h"	// This must go first in EVERY cpp file int the GameEngine

#include "Common/CRCDebug.h"
#include "Common/GameState.h"
#include "Common/PerfTimer.h"
#include "Common/Player.h"
#include "Common/PlayerList.h"
#include "Common/ThingTemplate.h"
#include "Common/Xfer.h"
#include "Common/XferCRC.h"

#include "GameLogic/AI.h"
#include "GameLogic/PartitionManager.h"
#include "GameLogic/Module/AIUpdate.h"
#include "GameLogic/Module/ContainModule.h"
#include "GameLogic/ScriptEngine.h"
#include "GameLogic/SidesList.h"
#include "GameLogic/AIPathfind.h"
#include "GameLogic/Weapon.h"

extern void addIcon(const Coord3D *pos, Real width, Int numFramesDuration, RGBColor color);

#ifdef _INTERNAL
// for occasional debugging...
//#pragma optimize("", off)
//#pragma MESSAGE("************************************** WARNING, optimization disabled for debugging purposes")
#endif

///////////////////////////////////////////////////////////////////////////////////////////////////
// PRIVATE CLASS ///////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////
void TAiData::addSideInfo(AISideInfo *infoToAdd) 
{
	infoToAdd->m_next = m_sideInfo;
	m_sideInfo = infoToAdd;
}

void TAiData::addFactionBuildList(AISideBuildList *buildList) 
{

	AISideBuildList *info = m_sideBuildLists;
	while (info) {
		if (buildList->m_side == info->m_side) {
			if (info->m_buildList)
				info->m_buildList->deleteInstance();
			info->m_buildList = buildList->m_buildList;
			buildList->m_buildList = NULL;
			buildList->m_next = NULL;
			buildList->deleteInstance();
			return;
		}
		info = info->m_next;
	}
	buildList->m_next = m_sideBuildLists;
	m_sideBuildLists = buildList;
}

TAiData::~TAiData()
{
	AISideInfo *info = m_sideInfo;
	m_sideInfo = NULL;
	while (info) { 
		AISideInfo *cur = info;
		info = info->m_next;
		cur->deleteInstance();
	}

	AISideBuildList *build = m_sideBuildLists;
	m_sideBuildLists = NULL;
	while (build) { 
		AISideBuildList *cur = build;
		build = build->m_next;
		cur->deleteInstance();
	}

}

///////////////////////////////////////////////////////////////////////////////////////////////////
// PRIVATE CLASS ///////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////
AISideBuildList::AISideBuildList( AsciiString side ) : 
	m_side(side), 
	m_buildList(NULL), 
	m_next(NULL)
{
}

AISideBuildList::~AISideBuildList()
{
	if (m_buildList) {
		m_buildList->deleteInstance(); // note - deletes all in the list.
	}
	m_buildList = NULL;
}

void AISideBuildList::addInfo(BuildListInfo *info)
{
	// Add to the end of the list.
	if (m_buildList == NULL) {
		m_buildList = info;
	} else {
		BuildListInfo *cur = m_buildList;
		while (cur && cur->getNext()) {
			cur = cur->getNext();
		}
		DEBUG_ASSERTCRASH(cur && cur->getNext()==NULL, ("Logic error."));
		cur->setNextBuildList(info);
	}
	info->setNextBuildList(NULL); // should be at the end of the list.
}

///////////////////////////////////////////////////////////////////////////////////////////////////
// PRIVATE DATA ///////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////
static const FieldParse TheAIFieldParseTable[] = 
{
																	 
	{ "StructureSeconds",				INI::parseReal,NULL,		offsetof( TAiData, m_structureSeconds ) },
	{ "TeamSeconds",						INI::parseReal,NULL,		offsetof( TAiData, m_teamSeconds ) },
	{ "Wealthy",								INI::parseInt,NULL,			offsetof( TAiData, m_resourcesWealthy ) },
	{ "Poor",										INI::parseInt,NULL,		  offsetof( TAiData, m_resourcesPoor ) },
	{ "ForceIdleMSEC",					INI::parseDurationUnsignedInt,NULL,offsetof( TAiData, m_forceIdleFramesCount )	},
	{ "StructuresWealthyRate",	INI::parseReal,NULL,		offsetof( TAiData, m_structuresWealthyMod ) },
	{ "TeamsWealthyRate",				INI::parseReal,NULL,		offsetof( TAiData, m_teamWealthyMod ) },
	{ "StructuresPoorRate",			INI::parseReal,NULL,		offsetof( TAiData, m_structuresPoorMod ) },
	{ "TeamsPoorRate",					INI::parseReal,NULL,		offsetof( TAiData, m_teamPoorMod ) },
	{ "TeamResourcesToStart",		INI::parseReal,NULL,		offsetof( TAiData, m_teamResourcesToBuild ) },
	{ "GuardInnerModifierAI",		INI::parseReal,NULL,		offsetof( TAiData, m_guardInnerModifierAI ) },
	{ "GuardOuterModifierAI",		INI::parseReal,NULL,		offsetof( TAiData, m_guardOuterModifierAI ) },
	{ "GuardInnerModifierHuman",INI::parseReal,NULL,		offsetof( TAiData, m_guardInnerModifierHuman ) },
	{ "GuardOuterModifierHuman",INI::parseReal,NULL,		offsetof( TAiData, m_guardOuterModifierHuman ) },
	{ "GuardChaseUnitsDuration",				INI::parseDurationUnsignedInt,NULL,		offsetof( TAiData, m_guardChaseUnitFrames ) },
	{ "GuardEnemyScanRate",				INI::parseDurationUnsignedInt,NULL,		offsetof( TAiData, m_guardEnemyScanRate ) },
	{ "GuardEnemyReturnScanRate",				INI::parseDurationUnsignedInt,NULL,		offsetof( TAiData, m_guardEnemyReturnScanRate ) },
	{ "SkirmishGroupFudgeDistance",	INI::parseReal,NULL,		offsetof( TAiData, m_skirmishGroupFudgeValue ) },

	{ "RepulsedDistance",				INI::parseReal,NULL,		offsetof( TAiData, m_repulsedDistance ) },
	{ "EnableRepulsors",				INI::parseBool,NULL,		offsetof( TAiData, m_enableRepulsors ) },

	{	"AlertRangeModifier",			INI::parseReal,NULL,		offsetof( TAiData, m_alertRangeModifier)	},
	{	"AggressiveRangeModifier",INI::parseReal,NULL,		offsetof( TAiData, m_aggressiveRangeModifier)	},

	{ "ForceSkirmishAI",				INI::parseBool,NULL,		offsetof( TAiData, m_forceSkirmishAI ) },
	{ "RotateSkirmishBases",		INI::parseBool,NULL,		offsetof( TAiData, m_rotateSkirmishBases ) },

	{ "AttackUsesLineOfSight",	INI::parseBool,NULL,		offsetof( TAiData, m_attackUsesLineOfSight ) },
	{ "AttackIgnoreInsignificantBuildings",	INI::parseBool,NULL,		offsetof( TAiData, m_attackIgnoreInsignificantBuildings ) },

	
	{ "AttackPriorityDistanceModifier", INI::parseReal,NULL, offsetof( TAiData, m_attackPriorityDistanceModifier) },
 	{ "MaxRecruitRadius",				INI::parseReal,NULL,		offsetof( TAiData, m_maxRecruitDistance ) },

 	{ "WallHeight",							INI::parseReal,NULL,		offsetof( TAiData, m_wallHeight ) },

	{ "SideInfo",			AI::parseSideInfo,			NULL, NULL },


	{ "SkirmishBuildList",			AI::parseSkirmishBuildList,			NULL, NULL },


 	{ "MinInfantryForGroup",		INI::parseInt,NULL,			offsetof( TAiData, m_minInfantryForGroup ) },
 	{ "MinVehiclesForGroup",		INI::parseInt,NULL,			offsetof( TAiData, m_minVehiclesForGroup ) },

 	{ "MinDistanceForGroup",		INI::parseReal,NULL,			offsetof( TAiData, m_minDistanceForGroup ) },
 	{ "DistanceRequiresGroup",	INI::parseReal,NULL,			offsetof( TAiData, m_distanceRequiresGroup ) },
 	{ "MinClumpDensity",				INI::parseReal,NULL,			offsetof( TAiData, m_minClumpDensity ) },

 	{ "InfantryPathfindDiameter",		INI::parseInt,NULL,			offsetof( TAiData, m_infantryPathfindDiameter ) },
 	{ "VehiclePathfindDiameter",		INI::parseInt,NULL,			offsetof( TAiData, m_vehiclePathfindDiameter ) },
 	{ "RebuildDelayTimeSeconds",		INI::parseInt,NULL,			offsetof( TAiData, m_rebuildDelaySeconds ) },
 	{ "SupplyCenterSafeRadius",			INI::parseReal,NULL,			offsetof( TAiData, m_supplyCenterSafeRadius ) },

 	{ "AIDozerBoredRadiusModifier",	INI::parseReal,NULL,			offsetof( TAiData, m_aiDozerBoredRadiusModifier ) },
 	{ "AICrushesInfantry",	INI::parseBool,NULL,			offsetof( TAiData, m_aiCrushesInfantry ) },



	{ NULL,					NULL,						NULL,						0 }  // keep this last

};

void AI::parseSideInfo(INI *ini, void *instance, void* /*store*/, const void* /*userData*/)
{
	const char* c = ini->getNextToken();
	AsciiString side(c);

	static const FieldParse myFieldParse[] = 
		{
			{ "ResourceGatherersEasy",				INI::parseInt,						NULL, offsetof( AISideInfo, m_easy ) },
			{ "ResourceGatherersNormal",			INI::parseInt,						NULL, offsetof( AISideInfo, m_normal ) },
      { "ResourceGatherersHard",				INI::parseInt,						NULL, offsetof( AISideInfo, m_hard ) },
      { "BaseDefenseStructure1",				INI::parseAsciiString,		NULL, offsetof( AISideInfo, m_baseDefenseStructure1 ) },
			{ "SkillSet1",										AI::parseSkillSet,				NULL, offsetof( AISideInfo, m_skillSet1 ) },
			{ "SkillSet2",										AI::parseSkillSet,				NULL, offsetof( AISideInfo, m_skillSet2 ) },
			{ "SkillSet3",										AI::parseSkillSet,				NULL, offsetof( AISideInfo, m_skillSet3 ) },
			{ "SkillSet4",										AI::parseSkillSet,				NULL, offsetof( AISideInfo, m_skillSet4 ) },
			{ "SkillSet5",										AI::parseSkillSet,				NULL, offsetof( AISideInfo, m_skillSet5 ) },
			{ NULL,							NULL,											NULL, 0 }  // keep this last
		};

	AISideInfo *resourceInfo = ((TAiData*)instance)->m_sideInfo;
	while (resourceInfo) {
		if (side == resourceInfo->m_side) {
			break;
		}
		resourceInfo = resourceInfo->m_next;
	}
	if (resourceInfo==NULL) 
	{
		resourceInfo = newInstance(AISideInfo);
		((TAiData*)instance)->addSideInfo(resourceInfo);
	}
	resourceInfo->m_side = side;
	ini->initFromINI(resourceInfo, myFieldParse);

}

void AI::parseSkillSet(INI *ini, void *instance, void* store, const void* /*userData*/)
{
	static const FieldParse myFieldParse[] = 
		{
			{ "Science",											AI::parseScience,					NULL, NULL },
			{ NULL,							NULL,											NULL, 0 }  // keep this last
		};

	TSkillSet *skillset = ((TSkillSet*)store);
	skillset->m_numSkills = 0;
	ini->initFromINI(store, myFieldParse);
}

void AI::parseScience(INI *ini, void *instance, void* /*store*/, const void* /*userData*/)
{
	TSkillSet *skillset = ((TSkillSet*)instance);
	if (skillset->m_numSkills>=MAX_AI_UPGRADES) {
#ifdef DEBUG_CRASHING
		const char* c = ini->getNextToken();
		DEBUG_CRASH(("Too many SCIENCE skills in skillset. Skill = %s, max is %d", c, MAX_AI_UPGRADES));
#endif
		return;
	}
	skillset->m_skills[skillset->m_numSkills] = SCIENCE_INVALID;
	INI::parseScience(ini, instance, skillset->m_skills+skillset->m_numSkills, NULL);
	ScienceType science = skillset->m_skills[skillset->m_numSkills];
	if (science != SCIENCE_INVALID) {
		if (TheScienceStore->getSciencePurchaseCost(science)==0) {
			DEBUG_CRASH(("Science %s is not purchaseable, can't be bought.", 
				TheScienceStore->getInternalNameForScience(science).str()));
			return;
		}
		skillset->m_numSkills++;
	}
}

void AI::parseSkirmishBuildList(INI *ini, void *instance, void* /*store*/, const void* /*userData*/)
{
	const char* c = ini->getNextToken();
	AsciiString faction(c);

	static const FieldParse myFieldParse[] = 
		{
			{ "Structure",			BuildListInfo::parseStructure,			NULL, NULL },
			{ NULL,							NULL,											NULL, 0 }  // keep this last
		};

	AISideBuildList *build = newInstance(AISideBuildList)(faction);	
	ini->initFromINI(build, myFieldParse);
	((TAiData*)instance)->addFactionBuildList(build);

}

//--------------------------------------------------------------------------------------------------------

/// The AI system singleton
AI *TheAI = NULL;


/**
 * Constructor for the AI system
 */
AI::AI( void )
{
	m_aiData = NEW TAiData;
	m_pathfinder = NEW Pathfinder;
	m_nextFormationID = NO_FORMATION_ID;
}

/**
 * Initialize the AI system
 */
void AI::init( void )
{
	m_nextGroupID = 0;
}

/**
 * Reset the AI system in preparation for a new map
 */
void AI::reset( void )
{
	m_pathfinder->reset();
	while (m_aiData && m_aiData->m_next) {
		TAiData *cur = m_aiData;
		m_aiData = m_aiData->m_next;
		delete cur;
	}
	while (m_groupList.size())
	{
		AIGroup *groupToRemove = m_groupList.front();
		if (groupToRemove)
		{
			destroyGroup(groupToRemove);
		}
		else
		{
			m_groupList.pop_front(); // NULL group, just kill from list.  Shouldn't really happen, but just in case.
		}
	}
	m_nextGroupID = 0;
	m_nextFormationID = NO_FORMATION_ID;
	getNextFormationID(); // increment once past NO_FORMATION_ID.  jba.
}

/**
 * Update the AI system
 */
void AI::update( void )
{
	// Do pathfinding.
	m_pathfinder->processPathfindQueue();

	// run player updates
	{
		ThePlayerList->UPDATE();
	}

}

/**
 * Destroy the AI system
 */
AI::~AI()
{
	if (m_pathfinder) {
		delete m_pathfinder;
	}
	m_pathfinder = NULL;
	while (m_aiData) 
	{
		TAiData *cur = m_aiData;
		m_aiData = m_aiData->m_next;
		delete cur;
	}
}


void AI::newOverride(void)
{
	TAiData *cur = m_aiData;
	m_aiData = NEW TAiData;
	*m_aiData = *cur;
	m_aiData->m_sideInfo = NULL;
	AISideInfo *info = cur->m_sideInfo;
	while (info) {
		AISideInfo *newInfo = newInstance(AISideInfo);
		*newInfo = *info;
		newInfo->m_next = NULL;
		addSideInfo(newInfo);
		info = info->m_next;
	}									
	m_aiData->m_sideBuildLists = NULL;
	AISideBuildList *build = cur->m_sideBuildLists;
	while (build) {
		AISideBuildList *newbuild = newInstance(AISideBuildList)(build->m_side);
		newbuild->m_next = NULL;
		newbuild->m_buildList = build->m_buildList->duplicate();
		m_aiData->addFactionBuildList(newbuild);
		build = build->m_next;
	}
	m_aiData->m_next = cur;
}

void AI::addSideInfo(AISideInfo *infoToAdd)
{
	m_aiData->addSideInfo(infoToAdd);

}

//-------------------------------------------------------------------------------------------------
/** Parse GameData entry */
//-------------------------------------------------------------------------------------------------
void AI::parseAiDataDefinition( INI* ini )
{
	if( TheAI )
	{

		// 
		// if the type of loading we're doing creates override data, we need to
		// be loading into a new override item
		//
		if( ini->getLoadType() == INI_LOAD_CREATE_OVERRIDES )
			TheAI->newOverride();

	}  // end if

	// parse the ini weapon definition
	ini->initFromINI( TheAI->m_aiData, TheAIFieldParseTable );

}




//--------------------------------------------------------------------------------------------------------
/**
 * Create a new AI Group
 */
AIGroup *AI::createGroup( void )
{
	// create a new instance
	AIGroup *group = newInstance(AIGroup);

	// add it to the list
//	DEBUG_LOG(("***AIGROUP %x is being added to m_groupList.\n", group ));
	m_groupList.push_back( group );

	return group;
}

/**
 * Destroy the given AI Group
 */
void AI::destroyGroup( AIGroup *group )
{
	std::list<AIGroup *>::iterator i = std::find( m_groupList.begin(), m_groupList.end(), group );

	// make sure group is actually in the list
	if (i == m_groupList.end())
		return;

	DEBUG_ASSERTCRASH(group != NULL, ("A NULL group made its way into the AIGroup list.. jkmcd"));

	// remove it
//	DEBUG_LOG(("***AIGROUP %x is being removed from m_groupList.\n", group ));
	m_groupList.erase( i );

	// destroy group
	group->deleteInstance();
}

/**
 * Given an ID, return the associated AIGroup
 */
AIGroup *AI::findGroup( UnsignedInt id )
{
	/// @todo Optimize this (MSB)
	std::list<AIGroup *>::iterator i;
	for( i=m_groupList.begin(); i!=m_groupList.end(); ++i )
		if ((*i)->getID() == id)
			return (*i);

	return NULL;
}

//--------------------------------------------------------------------------------------------------------
/**
 * Get the next formation id.
 */
FormationID AI::getNextFormationID(void )
{
	FormationID nextVal = m_nextFormationID;
	m_nextFormationID = (FormationID) (nextVal+1);
	return nextVal;
}

//-----------------------------------------------------------------------------
class PartitionFilterLiveMapEnemies : public PartitionFilter
{
private:
	const Object *m_obj;
public:
	PartitionFilterLiveMapEnemies(const Object *obj) : m_obj(obj) { }

	virtual Bool allow(Object *objOther)
	{
		// this is way fast (bit test) so do it first.
		if (objOther->isEffectivelyDead())
			return false;

		// this is also way fast (bit test) so do it next.
		if (objOther->isOffMap() != m_obj->isOffMap())
			return false;

		Relationship r = m_obj->getRelationship(objOther);
		if (r != ENEMIES)
			return false;

		return true;
	}

#if defined(_DEBUG) || defined(_INTERNAL)
	virtual const char* debugGetName() { return "PartitionFilterLiveMapEnemies"; }
#endif
};

//-----------------------------------------------------------------------------
class PartitionFilterWithinAttackRange : public PartitionFilter
{
private:
	const Object* m_obj;
public:
	PartitionFilterWithinAttackRange(const Object* obj) : m_obj(obj) { }

	virtual Bool allow(Object* objOther)
	{
		for (Int i = 0; i < WEAPONSLOT_COUNT;	i++ )
		{
			// ignore empty slots.
			const Weapon* w = m_obj->getWeaponInWeaponSlot((WeaponSlotType)i);
			if (w == NULL)
				continue;

			if (w->isWithinAttackRange(m_obj, objOther))
			{
				return true;
			}
		}
		return false;
	}

#if defined(_DEBUG) || defined(_INTERNAL)
	virtual const char* debugGetName() { return "PartitionFilterWithinAttackRange"; }
#endif
};


typedef struct 
{
	Int priority;
	const AttackPriorityInfo *info;
} TPriorityInfo;

static void priorityFunc(Object *obj, void *userData)
{
	TPriorityInfo *dp;
	dp = (TPriorityInfo*)userData;
	Int curPriority = dp->info->getPriority(obj->getTemplate());
	if (curPriority>dp->priority) {
		dp->priority = curPriority;
	}
}


//-----------------------------------------------------------------------------
/**
 * Return the closest enemy, according to the qualifiers.
 */
Object *AI::findClosestEnemy( const Object *me, Real range, UnsignedInt qualifiers, 
														 const AttackPriorityInfo *info, PartitionFilter *optionalFilter)
{

	if ((qualifiers & CAN_ATTACK) && !me->isAbleToAttack())
	{
		/*
			PartitionFilterPossibleToAttack would filter out everything anyway,
			so just punt here.
		*/
		return NULL;
	}

	// only consider live, on-map enemies.
	// since this gets called a ton, I made a special custom filter to
	// combine several canned ones, in the name of speed (srj)
	PartitionFilterLiveMapEnemies filterObvious(me);

	PartitionFilterWithinAttackRange filterWithinAttackRange(me);

	// never target buildings (unless they can attack)
	PartitionFilterRejectBuildings filterBldgs(me);

	// and only stuff that isn't stealthed (and not detected)
	// (note that stealthed allies aren't hidden from us, but we're only looking for enemies here)
	// *** This doesn't cut it anymore. Bombtrucks can be disguised as an enemy member meaning we
	//     still want to acquire it -- however this old filter fails because the unit is stealthed.
	//PartitionFilterRejectByObjectStatus filterStealth(OBJECT_STATUS_STEALTHED, OBJECT_STATUS_DETECTED);
	// *** Use this new filter
	PartitionFilterStealthedAndUndetected filterStealth( me, false );

	// (optional) only stuff we can see.
	PartitionFilterLineOfSight	filterLOS(me);

	// (optional) only stuff we can attack
	PartitionFilterPossibleToAttack filterAttack(ATTACK_NEW_TARGET, me, CMD_FROM_AI);

	// (optional) only stuff that is significant
	PartitionFilterInsignificantBuildings filterInsignificant(true, false);
	
	// (optional) only stuff clear of fog
	PartitionFilterFreeOfFog filterFogged(me->getControllingPlayer()->getPlayerIndex());

	PartitionFilter *filters[16];
	Int numFilters = 0;

	// Important note: the filters are called in order, and once one rejects an object,
	// the remaining ones are not called, so you should endeavor to
	// arrange them such that the most-coarse (ie, the ones that will usually REJECT
	// the most objects) should come first.
	//
	// srj sez: I actually did profiling on USA04 (enabling FILTER_PROFILING in partition mgr)
	// to determine the order of these. some observations:
	//
	// -- filterTeam is BY FAR the best to put first (since most things near you tend to be nonenemies).
	// -- filterLOS tends to reject a very large number, but is computationally expensive
	// -- filterStealth is BY FAR the least common to be useful, so it goes last.
	// GS Fog check used to be inside can attack, so it feels right to be right after it

	filters[numFilters++] = &filterObvious;	

	if( !(qualifiers & ATTACK_BUILDINGS) )
		filters[numFilters++] = &filterBldgs;

	if (qualifiers & WITHIN_ATTACK_RANGE)
		filters[numFilters++] = &filterWithinAttackRange;

	if (qualifiers & CAN_SEE)
		filters[numFilters++] = &filterLOS;

	if (qualifiers & CAN_ATTACK)
		filters[numFilters++] = &filterAttack;

	if (qualifiers & UNFOGGED)
		filters[numFilters++] = &filterFogged;

	if (qualifiers & IGNORE_INSIGNIFICANT_BUILDINGS)
		filters[numFilters++] = &filterInsignificant;

	filters[numFilters++] = &filterStealth;

	if (optionalFilter) 
	{
		filters[numFilters++] = optionalFilter;
	}

	filters[numFilters] = NULL;

	if (info == NULL || info == TheScriptEngine->getDefaultAttackInfo()) 
	{
		// No additional attack info, so just return the closest one.
		Object* o = ThePartitionManager->getClosestObject( me, range, FROM_BOUNDINGSPHERE_2D, filters );
		return o;
	}

	Object *bestEnemy = NULL;
	Int			effectivePriority=0;
	Int			actualPriority=0;
	ObjectIterator *iter = ThePartitionManager->iterateObjectsInRange(me, range, FROM_BOUNDINGSPHERE_2D, filters, ITER_SORTED_NEAR_TO_FAR);
	MemoryPoolObjectHolder holder(iter);
	for (Object *theEnemy = iter->first(); theEnemy; theEnemy = iter->next()) 
	{
		Int curPriority = info->getPriority(theEnemy->getTemplate());
		if (curPriority == 0) 
			continue; // don't attack 0 priority targets.

		/* check for garrisoned buildings/vehicles & see if a higher priority unit is inside. */
		ContainModuleInterface* contain = theEnemy->getContain();
		if (contain) {
			TPriorityInfo priorityInfo;
			priorityInfo.priority = curPriority;
			priorityInfo.info = info;
			contain->iterateContained( priorityFunc, &priorityInfo, false ) ;
			if (priorityInfo.priority > curPriority) {
				curPriority = priorityInfo.priority;
			}
		}

		Real distSqr = ThePartitionManager->getDistanceSquared(me, theEnemy, FROM_BOUNDINGSPHERE_2D);
		Real dist = sqrt(distSqr);
		Int modifier = dist/TheAI->getAiData()->m_attackPriorityDistanceModifier;
		Int modPriority = curPriority-modifier;
		if (modPriority < 1) 
			modPriority = 1;
		if (modPriority > effectivePriority) 
		{
			effectivePriority = modPriority;
			actualPriority = curPriority;
			bestEnemy = theEnemy;
		}
		if (modPriority == effectivePriority && curPriority > actualPriority) 
		{
			effectivePriority = modPriority;
			actualPriority = curPriority;
			bestEnemy = theEnemy;
		}
	}	
	if (bestEnemy) {
		//DEBUG_LOG(("Find closest found %s, hunter %s, info %s\n", bestEnemy->getTemplate()->getName().str(), 
		//	me->getTemplate()->getName().str(), info->getName().str()));
	}
	return bestEnemy;
}




 /////////////////////////////
/**
 * Return the closest ally, according to the qualifiers.
 */
Object *AI::findClosestAlly( const Object *me, Real range, UnsignedInt qualifiers)
{
	// never target buildings (unless they can attack)
	PartitionFilterRejectBuildings		filterBldgs(me);

	// only consider allies.
	PartitionFilterRelationship	filterTeam(me, PartitionFilterRelationship::ALLOW_ALLIES);

	// and only stuff that is not dead
	PartitionFilterAlive filterAlive;

	// and on map (or not)
	PartitionFilterSameMapStatus filterMapStatus(me);

	// (optional) only stuff we can see.
	PartitionFilterLineOfSight	filterLOS(me);

	PartitionFilter *filters[16];
	Int numFilters = 0;

	filters[numFilters++] = &filterBldgs;
	filters[numFilters++] = &filterTeam;
	filters[numFilters++] = &filterAlive;
	filters[numFilters++] = &filterMapStatus;

	if (qualifiers & CAN_SEE)
		filters[numFilters++] = &filterLOS;

	filters[numFilters] = NULL;

	return ThePartitionManager->getClosestObject( me, range, FROM_BOUNDINGSPHERE_2D, filters );
}
/////////////////////////////



 /////////////////////////////
/**
 * Return the closest repulsor.
 */
Object *AI::findClosestRepulsor( const Object *me, Real range)
{

	if (!getAiData()->m_enableRepulsors) {
		return NULL;
	}

	// never target buildings (unless they can attack)
	PartitionFilterRepulsor		filter(me);

	// and only stuff that isn't stealthed (and not detected)
	// (note that stealthed allies aren't hidden from us, but that's ok. jba.)
	PartitionFilterRejectByObjectStatus filterStealth(OBJECT_STATUS_STEALTHED, OBJECT_STATUS_DETECTED);

	PartitionFilter *filters[16];
	Int numFilters = 0;

	filters[numFilters++] = &filter;
	filters[numFilters++] = &filterStealth;
	filters[numFilters] = NULL;

	return ThePartitionManager->getClosestObject( me, range, FROM_BOUNDINGSPHERE_2D, filters );
}
/////////////////////////////

Real AI::getAdjustedVisionRangeForObject(const Object *object, Int factorsToConsider)
{
	Real originalRange = object->getVisionRange();
	const AIUpdateInterface *ai = object->getAI();
	const TAiData *aiData = TheAI->getAiData();

	if (!ai) 
	{
		DEBUG_CRASH(("Unit without AI ('%s') calling AI::getAdjustedVisionRangeForObject. Notify jkmcd.", object->getTemplate()->getName().str()));
		return 0.0f;
	}
	
	UnsignedInt moodMatrixVal = ai->getMoodMatrixValue();

	if (factorsToConsider & AI_VISIONFACTOR_OWNERTYPE) 
	{
		Bool playerIsHuman = (moodMatrixVal & MM_Controller_Player) != 0;

		if (playerIsHuman) 
		{
			if (factorsToConsider & AI_VISIONFACTOR_GUARDINNER) 
				originalRange *= aiData->m_guardInnerModifierHuman;
			else
				originalRange *= aiData->m_guardOuterModifierHuman;
		} 
		else 
		{
			if (factorsToConsider & AI_VISIONFACTOR_GUARDINNER)
				originalRange *= aiData->m_guardInnerModifierAI;
			else
				originalRange *= aiData->m_guardOuterModifierAI;
		}
	}

	if (object->getContainedBy() != NULL) 
	{
		originalRange = object->getLargestWeaponRange();
	} 
	else 
	{
		if ((factorsToConsider & AI_VISIONFACTOR_MOOD) && ((moodMatrixVal & MM_Controller_Player) == 0) ) 
		{
			switch(moodMatrixVal & MM_Mood_Bitmask)
			{
				case MM_Mood_Sleep:
					return 0.0f;

				case MM_Mood_Passive:
				case MM_Mood_Normal: 
					break;
				
				case MM_Mood_Alert: 
					originalRange *= TheAI->getAiData()->m_alertRangeModifier;
					break;

				case MM_Mood_Aggressive:
					originalRange *= TheAI->getAiData()->m_aggressiveRangeModifier;
					break;
			}
		}
	}

#if defined(_DEBUG) || defined(_INTERNAL)
	if (TheGlobalData->m_debugVisibility) 
	{
		// ICK. This really nasty statement is used so that we only initialize this color once.
		// It should be exactly double the intensity of its targettable brother.
		static RGBColor theAdjustedVisionColor = {
			(TheGlobalData->m_debugVisibilityTargettableColor.red * 2 <= 1.0f ? 
				TheGlobalData->m_debugVisibilityTargettableColor.red * 2 :
				1.0f),
			(TheGlobalData->m_debugVisibilityTargettableColor.green * 2 <= 1.0f ? 
				TheGlobalData->m_debugVisibilityTargettableColor.green * 2 :
				1.0f),
			(TheGlobalData->m_debugVisibilityTargettableColor.blue * 2 <= 1.0f ? 
				TheGlobalData->m_debugVisibilityTargettableColor.blue * 2 :
				1.0f)
		};

		Vector3 pos(originalRange, 0, 0);
		for (int i = 0; i < TheGlobalData->m_debugVisibilityTileCount; ++i) 
		{
			pos.Rotate_Z(1.0f * i / TheGlobalData->m_debugVisibilityTileCount * 2 * PI);
			Coord3D coord = { pos.X + object->getPosition()->x, pos.Y + object->getPosition()->y, pos.Z + object->getPosition()->z };

			addIcon(&coord, TheGlobalData->m_debugVisibilityTileWidth, 
											TheGlobalData->m_debugVisibilityTileDuration, 
											theAdjustedVisionColor);
		}
	}
#endif
	return originalRange;
}

//-------------------------------------------------------------------------------------------------
TAiData::TAiData() : 
m_next(NULL), 
m_sideInfo(NULL), 
m_attackIgnoreInsignificantBuildings(false),
m_skirmishGroupFudgeValue(0.0f),
m_structureSeconds(0), 
m_teamSeconds(0), 
m_resourcesWealthy(0), 
m_resourcesPoor(0), 
m_forceIdleFramesCount(1),
m_structuresWealthyMod(0),
m_teamPoorMod(0),
m_teamResourcesToBuild(0),
m_guardInnerModifierAI(0),
m_guardOuterModifierAI(0),
m_guardInnerModifierHuman(0),
m_guardOuterModifierHuman(0),
m_guardChaseUnitFrames(0),
m_guardEnemyScanRate(LOGICFRAMES_PER_SECOND/2),
m_guardEnemyReturnScanRate(LOGICFRAMES_PER_SECOND),
m_wallHeight(0),
m_alertRangeModifier(0),
m_aggressiveRangeModifier(0),
m_attackPriorityDistanceModifier(0),
m_maxRecruitDistance(0),
m_repulsedDistance(0),
m_enableRepulsors(false),
m_forceSkirmishAI(false),
m_rotateSkirmishBases(false),
m_attackUsesLineOfSight(true),
m_minInfantryForGroup(3),
m_minVehiclesForGroup(4),
m_minDistanceForGroup(100),
m_minClumpDensity(0.5f),
m_infantryPathfindDiameter(6),
m_vehiclePathfindDiameter(6),
m_supplyCenterSafeRadius(250),
m_rebuildDelaySeconds(10),
//Added By Sadullah Nader
//Initialization(s) inserted
m_distanceRequiresGroup(0.0f),
m_sideBuildLists(NULL),
m_structuresPoorMod(0.0f),
m_teamWealthyMod(0.0f),
m_aiDozerBoredRadiusModifier(2.0),
m_aiCrushesInfantry(true)
//
{
}

//-------------------------------------------------------------------------------------------------
void TAiData::crc( Xfer *xfer )
{
	xfer->xferReal( &m_structureSeconds );
	xfer->xferReal( &m_teamSeconds );
	xfer->xferInt( &m_resourcesWealthy );
	xfer->xferInt( &m_resourcesPoor );
	xfer->xferUnsignedInt( &m_forceIdleFramesCount );
	xfer->xferReal( &m_structuresWealthyMod );
	xfer->xferReal( &m_teamWealthyMod );
	xfer->xferReal( &m_structuresPoorMod );
	xfer->xferReal( &m_teamPoorMod );
	xfer->xferReal( &m_teamResourcesToBuild );
	xfer->xferReal( &m_guardInnerModifierAI );
	xfer->xferReal( &m_guardOuterModifierAI );
	xfer->xferReal( &m_guardInnerModifierHuman );
	xfer->xferReal( &m_guardOuterModifierHuman );
	xfer->xferUnsignedInt( &m_guardChaseUnitFrames );
	xfer->xferUnsignedInt( &m_guardEnemyScanRate );
	xfer->xferUnsignedInt( &m_guardEnemyReturnScanRate );
	xfer->xferReal( &m_alertRangeModifier );
	xfer->xferReal( &m_aggressiveRangeModifier );
	xfer->xferReal( &m_attackPriorityDistanceModifier );
	xfer->xferReal( &m_maxRecruitDistance );
	xfer->xferReal( &m_repulsedDistance );
	xfer->xferBool( &m_enableRepulsors );
	CRCGEN_LOG(("CRC after AI TAiData for frame %d is 0x%8.8X\n", TheGameLogic->getFrame(), ((XferCRC *)xfer)->getCRC()));

}  // end crc

//-----------------------------------------------------------------------------
void TAiData::xfer( Xfer *xfer )
{

	// version
	XferVersion currentVersion = 1;
	XferVersion version = currentVersion;
	xfer->xferVersion( &version, currentVersion );

}  // end xfer

//-----------------------------------------------------------------------------
void TAiData::loadPostProcess( void )
{

}  // end loadPostProcess

//-----------------------------------------------------------------------------
void AI::crc( Xfer *xfer )
{

	xfer->xferSnapshot( m_pathfinder );
	CRCGEN_LOG(("CRC after AI pathfinder for frame %d is 0x%8.8X\n", TheGameLogic->getFrame(), ((XferCRC *)xfer)->getCRC()));

	AsciiString marker;
	TAiData *aiData = m_aiData;
	while (aiData)
	{
		marker = "MARKER:TAiData";
		xfer->xferAsciiString(&marker);
		xfer->xferSnapshot( aiData );
		aiData = aiData->m_next;
	}

	for (std::list<AIGroup *>::iterator groupIt = m_groupList.begin(); groupIt != m_groupList.end(); ++groupIt)
	{
		if (*groupIt)
		{
			marker = "MARKER:AIGroup";
			xfer->xferAsciiString(&marker);
			xfer->xferSnapshot( (*groupIt) );
		}
	}

}  // end crc

//-----------------------------------------------------------------------------
void AI::xfer( Xfer *xfer )
{

	// version
	XferVersion currentVersion = 1;
	XferVersion version = currentVersion;
	xfer->xferVersion( &version, currentVersion );

}  // end xfer

//-----------------------------------------------------------------------------
void AI::loadPostProcess( void )
{

}  // end loadPostProcess