/** 
 * @file llpathfindinglinksets.cpp
 * @author William Todd Stinson
 * @brief Definition of a pathfinding linkset that contains various properties required for havok pathfinding.
 *
 * $LicenseInfo:firstyear=2002&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"
#include "llpathfindinglinkset.h"
#include "llsd.h"
#include "v3math.h"
#include "lluuid.h"

#define LINKSET_NAME_FIELD                 "name"
#define LINKSET_DESCRIPTION_FIELD          "description"
#define LINKSET_LAND_IMPACT_FIELD          "landimpact"
#define LINKSET_MODIFIABLE_FIELD           "modifiable"
#ifdef DEPRECATED_NAVMESH_PERMANENT_WALKABLE_FLAGS
#define DEPRECATED_LINKSET_PERMANENT_FIELD "permanent"
#define DEPRECATED_LINKSET_WALKABLE_FIELD  "walkable"
#endif // DEPRECATED_NAVMESH_PERMANENT_WALKABLE_FLAGS
#define LINKSET_CATEGORY_FIELD             "navmesh_category"
#define LINKSET_CAN_BE_VOLUME              "can_be_volume"
#define LINKSET_PHANTOM_FIELD              "phantom"
#define LINKSET_WALKABILITY_A_FIELD        "A"
#define LINKSET_WALKABILITY_B_FIELD        "B"
#define LINKSET_WALKABILITY_C_FIELD        "C"
#define LINKSET_WALKABILITY_D_FIELD        "D"
#define LINKSET_POSITION_FIELD             "position"

#define LINKSET_CATEGORY_VALUE_INCLUDE 0
#define LINKSET_CATEGORY_VALUE_EXCLUDE 1
#define LINKSET_CATEGORY_VALUE_IGNORE  2

//---------------------------------------------------------------------------
// LLPathfindingLinkset
//---------------------------------------------------------------------------

const S32 LLPathfindingLinkset::MIN_WALKABILITY_VALUE(0);
const S32 LLPathfindingLinkset::MAX_WALKABILITY_VALUE(100);

LLPathfindingLinkset::LLPathfindingLinkset(const LLSD& pTerrainLinksetItem)
	: mUUID(),
	mIsTerrain(true),
	mName(),
	mDescription(),
	mLandImpact(0U),
	mLocation(LLVector3::zero),
#ifdef MISSING_MODIFIABLE_FIELD_WAR
	mHasModifiable(true),
#endif // MISSING_MODIFIABLE_FIELD_WAR
	mIsModifiable(FALSE),
	mCanBeVolume(FALSE),
	mLinksetUse(kUnknown),
	mWalkabilityCoefficientA(MIN_WALKABILITY_VALUE),
	mWalkabilityCoefficientB(MIN_WALKABILITY_VALUE),
	mWalkabilityCoefficientC(MIN_WALKABILITY_VALUE),
	mWalkabilityCoefficientD(MIN_WALKABILITY_VALUE)
{
	parsePathfindingData(pTerrainLinksetItem);
}

LLPathfindingLinkset::LLPathfindingLinkset(const std::string &pUUID, const LLSD& pLinksetItem)
	: mUUID(pUUID),
	mIsTerrain(false),
	mName(),
	mDescription(),
	mLandImpact(0U),
	mLocation(LLVector3::zero),
#ifdef MISSING_MODIFIABLE_FIELD_WAR
	mHasModifiable(false),
#endif // MISSING_MODIFIABLE_FIELD_WAR
	mIsModifiable(TRUE),
	mCanBeVolume(TRUE),
	mLinksetUse(kUnknown),
	mWalkabilityCoefficientA(MIN_WALKABILITY_VALUE),
	mWalkabilityCoefficientB(MIN_WALKABILITY_VALUE),
	mWalkabilityCoefficientC(MIN_WALKABILITY_VALUE),
	mWalkabilityCoefficientD(MIN_WALKABILITY_VALUE)
{
	parseObjectData(pLinksetItem);
	parsePathfindingData(pLinksetItem);
}

LLPathfindingLinkset::LLPathfindingLinkset(const LLPathfindingLinkset& pOther)
	: mUUID(pOther.mUUID),
	mName(pOther.mName),
	mDescription(pOther.mDescription),
	mLandImpact(pOther.mLandImpact),
	mLocation(pOther.mLocation),
#ifdef MISSING_MODIFIABLE_FIELD_WAR
	mHasModifiable(pOther.mHasModifiable),
	mIsModifiable(pOther.mHasModifiable ? pOther.mIsModifiable : TRUE),
#else // MISSING_MODIFIABLE_FIELD_WAR
	mIsModifiable(pOther.mIsModifiable),
#endif // MISSING_MODIFIABLE_FIELD_WAR
	mCanBeVolume(pOther.mCanBeVolume),
	mLinksetUse(pOther.mLinksetUse),
	mWalkabilityCoefficientA(pOther.mWalkabilityCoefficientA),
	mWalkabilityCoefficientB(pOther.mWalkabilityCoefficientB),
	mWalkabilityCoefficientC(pOther.mWalkabilityCoefficientC),
	mWalkabilityCoefficientD(pOther.mWalkabilityCoefficientD)
{
}

LLPathfindingLinkset::~LLPathfindingLinkset()
{
}

LLPathfindingLinkset& LLPathfindingLinkset::operator =(const LLPathfindingLinkset& pOther)
{
	mUUID = pOther.mUUID;
	mName = pOther.mName;
	mDescription = pOther.mDescription;
	mLandImpact = pOther.mLandImpact;
	mLocation = pOther.mLocation;
#ifdef MISSING_MODIFIABLE_FIELD_WAR
	if (pOther.mHasModifiable)
	{
		mHasModifiable = pOther.mHasModifiable;
		mIsModifiable = pOther.mIsModifiable;
	}
#else // MISSING_MODIFIABLE_FIELD_WAR
	mIsModifiable = pOther.mIsModifiable;
#endif // MISSING_MODIFIABLE_FIELD_WAR
	mCanBeVolume = pOther.mCanBeVolume;
	mLinksetUse = pOther.mLinksetUse;
	mWalkabilityCoefficientA = pOther.mWalkabilityCoefficientA;
	mWalkabilityCoefficientB = pOther.mWalkabilityCoefficientB;
	mWalkabilityCoefficientC = pOther.mWalkabilityCoefficientC;
	mWalkabilityCoefficientD = pOther.mWalkabilityCoefficientD;

	return *this;
}

BOOL LLPathfindingLinkset::isPhantom() const
{
	return isPhantom(getLinksetUse());
}

LLPathfindingLinkset::ELinksetUse LLPathfindingLinkset::getLinksetUseWithToggledPhantom(ELinksetUse pLinksetUse)
{
	BOOL isPhantom = LLPathfindingLinkset::isPhantom(pLinksetUse);
	ENavMeshGenerationCategory navMeshGenerationCategory = getNavMeshGenerationCategory(pLinksetUse);

	return getLinksetUse(!isPhantom, navMeshGenerationCategory);
}

bool LLPathfindingLinkset::isShowUnmodifiablePhantomWarning(ELinksetUse pLinksetUse) const
{
	return (!isModifiable() && (isPhantom() != isPhantom(pLinksetUse)));
}

bool LLPathfindingLinkset::isShowCannotBeVolumeWarning(ELinksetUse pLinksetUse) const
{
	return (!canBeVolume() && ((pLinksetUse == kMaterialVolume) || (pLinksetUse == kExclusionVolume)));
}

LLSD LLPathfindingLinkset::encodeAlteredFields(ELinksetUse pLinksetUse, S32 pA, S32 pB, S32 pC, S32 pD) const
{
	LLSD itemData;

	if (!isTerrain() && (pLinksetUse != kUnknown) && (getLinksetUse() != pLinksetUse) &&
		(canBeVolume() || ((pLinksetUse != kMaterialVolume) && (pLinksetUse != kExclusionVolume))))
	{
		if (isModifiable())
		{
			itemData[LINKSET_PHANTOM_FIELD] = static_cast<bool>(isPhantom(pLinksetUse));
		}

#ifdef DEPRECATED_NAVMESH_PERMANENT_WALKABLE_FLAGS
		itemData[DEPRECATED_LINKSET_PERMANENT_FIELD] = static_cast<bool>(isPermanent(pLinksetUse));
		itemData[DEPRECATED_LINKSET_WALKABLE_FIELD] = static_cast<bool>(isWalkable(pLinksetUse));
#endif // DEPRECATED_NAVMESH_PERMANENT_WALKABLE_FLAGS
		itemData[LINKSET_CATEGORY_FIELD] = convertCategoryToLLSD(getNavMeshGenerationCategory(pLinksetUse));
	}

	if (mWalkabilityCoefficientA != pA)
	{
		itemData[LINKSET_WALKABILITY_A_FIELD] = llclamp(pA, MIN_WALKABILITY_VALUE, MAX_WALKABILITY_VALUE);
	}

	if (mWalkabilityCoefficientB != pB)
	{
		itemData[LINKSET_WALKABILITY_B_FIELD] = llclamp(pB, MIN_WALKABILITY_VALUE, MAX_WALKABILITY_VALUE);
	}

	if (mWalkabilityCoefficientC != pC)
	{
		itemData[LINKSET_WALKABILITY_C_FIELD] = llclamp(pC, MIN_WALKABILITY_VALUE, MAX_WALKABILITY_VALUE);
	}

	if (mWalkabilityCoefficientD != pD)
	{
		itemData[LINKSET_WALKABILITY_D_FIELD] = llclamp(pD, MIN_WALKABILITY_VALUE, MAX_WALKABILITY_VALUE);
	}

	return itemData;
}

void LLPathfindingLinkset::parseObjectData(const LLSD &pLinksetItem)
{
	llassert(pLinksetItem.has(LINKSET_NAME_FIELD));
	llassert(pLinksetItem.get(LINKSET_NAME_FIELD).isString());
	mName = pLinksetItem.get(LINKSET_NAME_FIELD).asString();
	
	llassert(pLinksetItem.has(LINKSET_DESCRIPTION_FIELD));
	llassert(pLinksetItem.get(LINKSET_DESCRIPTION_FIELD).isString());
	mDescription = pLinksetItem.get(LINKSET_DESCRIPTION_FIELD).asString();
	
	llassert(pLinksetItem.has(LINKSET_LAND_IMPACT_FIELD));
	llassert(pLinksetItem.get(LINKSET_LAND_IMPACT_FIELD).isInteger());
	llassert(pLinksetItem.get(LINKSET_LAND_IMPACT_FIELD).asInteger() >= 0);
	mLandImpact = pLinksetItem.get(LINKSET_LAND_IMPACT_FIELD).asInteger();
	
#ifdef MISSING_MODIFIABLE_FIELD_WAR
	mHasModifiable = pLinksetItem.has(LINKSET_MODIFIABLE_FIELD);
	if (mHasModifiable)
	{
		llassert(pLinksetItem.get(LINKSET_MODIFIABLE_FIELD).isBoolean());
		mIsModifiable = pLinksetItem.get(LINKSET_MODIFIABLE_FIELD).asBoolean();
	}
#else // MISSING_MODIFIABLE_FIELD_WAR
	llassert(pLinksetItem.has(LINKSET_MODIFIABLE_FIELD));
	llassert(pLinksetItem.get(LINKSET_MODIFIABLE_FIELD).isBoolean());
	mIsModifiable = pLinksetItem.get(LINKSET_MODIFIABLE_FIELD).asBoolean();
#endif // MISSING_MODIFIABLE_FIELD_WAR
	
	llassert(pLinksetItem.has(LINKSET_POSITION_FIELD));
	llassert(pLinksetItem.get(LINKSET_POSITION_FIELD).isArray());
	mLocation.setValue(pLinksetItem.get(LINKSET_POSITION_FIELD));
}

void LLPathfindingLinkset::parsePathfindingData(const LLSD &pLinksetItem)
{
	bool isPhantom = false;
	if (pLinksetItem.has(LINKSET_PHANTOM_FIELD))
	{
		llassert(pLinksetItem.get(LINKSET_PHANTOM_FIELD).isBoolean());
		isPhantom = pLinksetItem.get(LINKSET_PHANTOM_FIELD).asBoolean();
	}
	
#ifdef DEPRECATED_NAVMESH_PERMANENT_WALKABLE_FLAGS
	if (pLinksetItem.has(LINKSET_CATEGORY_FIELD))
	{
		mLinksetUse = getLinksetUse(isPhantom, convertCategoryFromLLSD(pLinksetItem.get(LINKSET_CATEGORY_FIELD)));
	}
	else
	{
		llassert(pLinksetItem.has(DEPRECATED_LINKSET_PERMANENT_FIELD));
		llassert(pLinksetItem.get(DEPRECATED_LINKSET_PERMANENT_FIELD).isBoolean());
		bool isPermanent = pLinksetItem.get(DEPRECATED_LINKSET_PERMANENT_FIELD).asBoolean();

		llassert(pLinksetItem.has(DEPRECATED_LINKSET_WALKABLE_FIELD));
		llassert(pLinksetItem.get(DEPRECATED_LINKSET_WALKABLE_FIELD).isBoolean());
		bool isWalkable = pLinksetItem.get(DEPRECATED_LINKSET_WALKABLE_FIELD).asBoolean();

		mLinksetUse = getLinksetUse(isPhantom, isPermanent, isWalkable);
	}
#else // DEPRECATED_NAVMESH_PERMANENT_WALKABLE_FLAGS
	llassert(pLinksetItem.has(LINKSET_CATEGORY_FIELD));
	mLinksetUse = getLinksetUse(isPhantom, convertCategoryFromLLSD(pLinksetItem.get(LINKSET_CATEGORY_FIELD)));
#endif // DEPRECATED_NAVMESH_PERMANENT_WALKABLE_FLAGS

	if (pLinksetItem.has(LINKSET_CAN_BE_VOLUME))
	{
		llassert(pLinksetItem.get(LINKSET_CAN_BE_VOLUME).isBoolean());
		mCanBeVolume = pLinksetItem.get(LINKSET_CAN_BE_VOLUME).asBoolean();
	}

	llassert(pLinksetItem.has(LINKSET_WALKABILITY_A_FIELD));
	llassert(pLinksetItem.get(LINKSET_WALKABILITY_A_FIELD).isInteger());
	mWalkabilityCoefficientA = pLinksetItem.get(LINKSET_WALKABILITY_A_FIELD).asInteger();
	llassert(mWalkabilityCoefficientA >= MIN_WALKABILITY_VALUE);
	llassert(mWalkabilityCoefficientA <= MAX_WALKABILITY_VALUE);
	
	llassert(pLinksetItem.has(LINKSET_WALKABILITY_B_FIELD));
	llassert(pLinksetItem.get(LINKSET_WALKABILITY_B_FIELD).isInteger());
	mWalkabilityCoefficientB = pLinksetItem.get(LINKSET_WALKABILITY_B_FIELD).asInteger();
	llassert(mWalkabilityCoefficientB >= MIN_WALKABILITY_VALUE);
	llassert(mWalkabilityCoefficientB <= MAX_WALKABILITY_VALUE);
	
	llassert(pLinksetItem.has(LINKSET_WALKABILITY_C_FIELD));
	llassert(pLinksetItem.get(LINKSET_WALKABILITY_C_FIELD).isInteger());
	mWalkabilityCoefficientC = pLinksetItem.get(LINKSET_WALKABILITY_C_FIELD).asInteger();
	llassert(mWalkabilityCoefficientC >= MIN_WALKABILITY_VALUE);
	llassert(mWalkabilityCoefficientC <= MAX_WALKABILITY_VALUE);
	
	llassert(pLinksetItem.has(LINKSET_WALKABILITY_D_FIELD));
	llassert(pLinksetItem.get(LINKSET_WALKABILITY_D_FIELD).isInteger());
	mWalkabilityCoefficientD = pLinksetItem.get(LINKSET_WALKABILITY_D_FIELD).asInteger();
	llassert(mWalkabilityCoefficientD >= MIN_WALKABILITY_VALUE);
	llassert(mWalkabilityCoefficientD <= MAX_WALKABILITY_VALUE);
}

#ifdef DEPRECATED_NAVMESH_PERMANENT_WALKABLE_FLAGS
LLPathfindingLinkset::ELinksetUse LLPathfindingLinkset::getLinksetUse(bool pIsPhantom, bool pIsPermanent, bool pIsWalkable)
{
	return (pIsPhantom ? (pIsPermanent ? (pIsWalkable ? kMaterialVolume : kExclusionVolume) : kDynamicPhantom) :
		(pIsPermanent ? (pIsWalkable ? kWalkable : kStaticObstacle) : kDynamicObstacle));
}

BOOL LLPathfindingLinkset::isPermanent(ELinksetUse pLinksetUse)
{
	BOOL retVal;

	switch (pLinksetUse)
	{
	case kWalkable :
	case kStaticObstacle :
	case kMaterialVolume :
	case kExclusionVolume :
		retVal = true;
		break;
	case kDynamicObstacle :
	case kDynamicPhantom :
		retVal = false;
		break;
	case kUnknown :
	default :
		retVal = false;
		llassert(0);
		break;
	}

	return retVal;
}

BOOL LLPathfindingLinkset::isWalkable(ELinksetUse pLinksetUse)
{
	BOOL retVal;

	switch (pLinksetUse)
	{
	case kWalkable :
	case kMaterialVolume :
		retVal = true;
		break;
	case kStaticObstacle :
	case kDynamicObstacle :
	case kExclusionVolume :
	case kDynamicPhantom :
		retVal = false;
		break;
	case kUnknown :
	default :
		retVal = false;
		llassert(0);
		break;
	}

	return retVal;
}
#endif // DEPRECATED_NAVMESH_PERMANENT_WALKABLE_FLAGS

BOOL LLPathfindingLinkset::isPhantom(ELinksetUse pLinksetUse)
{
	BOOL retVal;

	switch (pLinksetUse)
	{
	case kWalkable :
	case kStaticObstacle :
	case kDynamicObstacle :
		retVal = false;
		break;
	case kMaterialVolume :
	case kExclusionVolume :
	case kDynamicPhantom :
		retVal = true;
		break;
	case kUnknown :
	default :
		retVal = false;
		llassert(0);
		break;
	}

	return retVal;
}

LLPathfindingLinkset::ELinksetUse LLPathfindingLinkset::getLinksetUse(bool pIsPhantom, ENavMeshGenerationCategory pNavMeshGenerationCategory)
{
	ELinksetUse linksetUse = kUnknown;

	if (pIsPhantom)
	{
		switch (pNavMeshGenerationCategory)
		{
		case kNavMeshGenerationIgnore :
			linksetUse = kDynamicPhantom;
			break;
		case kNavMeshGenerationInclude :
			linksetUse = kMaterialVolume;
			break;
		case kNavMeshGenerationExclude :
			linksetUse = kExclusionVolume;
			break;
		default :
			linksetUse = kUnknown;
			llassert(0);
			break;
		}
	}
	else
	{
		switch (pNavMeshGenerationCategory)
		{
		case kNavMeshGenerationIgnore :
			linksetUse = kDynamicObstacle;
			break;
		case kNavMeshGenerationInclude :
			linksetUse = kWalkable;
			break;
		case kNavMeshGenerationExclude :
			linksetUse = kStaticObstacle;
			break;
		default :
			linksetUse = kUnknown;
			llassert(0);
			break;
		}
	}

	return linksetUse;
}

LLPathfindingLinkset::ENavMeshGenerationCategory LLPathfindingLinkset::getNavMeshGenerationCategory(ELinksetUse pLinksetUse)
{
	ENavMeshGenerationCategory navMeshGenerationCategory;
	switch (pLinksetUse)
	{
	case kWalkable :
	case kMaterialVolume :
		navMeshGenerationCategory = kNavMeshGenerationInclude;
		break;
	case kStaticObstacle :
	case kExclusionVolume :
		navMeshGenerationCategory = kNavMeshGenerationExclude;
		break;
	case kDynamicObstacle :
	case kDynamicPhantom :
		navMeshGenerationCategory = kNavMeshGenerationIgnore;
		break;
	case kUnknown :
	default :
		navMeshGenerationCategory = kNavMeshGenerationIgnore;
		llassert(0);
		break;
	}

	return navMeshGenerationCategory;
}

LLSD LLPathfindingLinkset::convertCategoryToLLSD(ENavMeshGenerationCategory pNavMeshGenerationCategory)
{
	LLSD llsd;

	switch (pNavMeshGenerationCategory)
	{
		case kNavMeshGenerationIgnore :
			llsd = static_cast<S32>(LINKSET_CATEGORY_VALUE_IGNORE);
			break;
		case kNavMeshGenerationInclude :
			llsd = static_cast<S32>(LINKSET_CATEGORY_VALUE_INCLUDE);
			break;
		case kNavMeshGenerationExclude :
			llsd = static_cast<S32>(LINKSET_CATEGORY_VALUE_EXCLUDE);
			break;
		default :
			llsd = static_cast<S32>(LINKSET_CATEGORY_VALUE_IGNORE);
			llassert(0);
			break;
	}

	return llsd;
}

LLPathfindingLinkset::ENavMeshGenerationCategory LLPathfindingLinkset::convertCategoryFromLLSD(const LLSD &llsd)
{
	ENavMeshGenerationCategory navMeshGenerationCategory;

	llassert(llsd.isInteger());
	switch (llsd.asInteger())
	{
		case LINKSET_CATEGORY_VALUE_IGNORE :
			navMeshGenerationCategory = kNavMeshGenerationIgnore;
			break;
		case LINKSET_CATEGORY_VALUE_INCLUDE :
			navMeshGenerationCategory = kNavMeshGenerationInclude;
			break;
		case LINKSET_CATEGORY_VALUE_EXCLUDE :
			navMeshGenerationCategory = kNavMeshGenerationExclude;
			break;
		default :
			navMeshGenerationCategory = kNavMeshGenerationIgnore;
			llassert(0);
			break;
	}

	return navMeshGenerationCategory;
}