/****************************************************************************
Copyright (c) 2013 cocos2d-x.org

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Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

#include "CCColliderDetector.h"
#include "../CCBone.h"
#include "../utils/CCTransformHelp.h"

#if ENABLE_PHYSICS_BOX2D_DETECT
#include "Box2D/Box2D.h"
#elif ENABLE_PHYSICS_CHIPMUNK_DETECT
#include "chipmunk.h"
#endif


NS_CC_EXT_ARMATURE_BEGIN


#if ENABLE_PHYSICS_BOX2D_DETECT
ColliderBody::ColliderBody(ContourData *contourData)
    : _fixture(NULL)
    , _filter(NULL)
    , _contourData(contourData)
{
    CC_SAFE_RETAIN(_contourData);
}
#elif ENABLE_PHYSICS_CHIPMUNK_DETECT

ColliderBody::ColliderBody(ContourData *contourData)
    : _shape(NULL)
    , _contourData(contourData)
{
    CC_SAFE_RETAIN(_contourData);
}
#endif

ColliderBody::~ColliderBody()
{
    CC_SAFE_RELEASE(_contourData);

#if ENABLE_PHYSICS_BOX2D_DETECT
    CC_SAFE_DELETE(_filter);
#endif
}



ColliderDetector *ColliderDetector::create()
{
    ColliderDetector *pColliderDetector = new ColliderDetector();
    if (pColliderDetector && pColliderDetector->init())
    {
        pColliderDetector->autorelease();
        return pColliderDetector;
    }
    CC_SAFE_DELETE(pColliderDetector);
    return NULL;
}

ColliderDetector *ColliderDetector::create(Bone *bone)
{
    ColliderDetector *pColliderDetector = new ColliderDetector();
    if (pColliderDetector && pColliderDetector->init(bone))
    {
        pColliderDetector->autorelease();
        return pColliderDetector;
    }
    CC_SAFE_DELETE(pColliderDetector);
    return NULL;
}

ColliderDetector::ColliderDetector()
    : _colliderBodyList(NULL)
    , _active(false)
{
    _body = NULL;
}

ColliderDetector::~ColliderDetector()
{
    _colliderBodyList->removeAllObjects();
    CC_SAFE_DELETE(_colliderBodyList);
}

bool ColliderDetector::init()
{
    _colliderBodyList = Array::create();
    CCASSERT(_colliderBodyList, "create _colliderBodyList failed!");
    _colliderBodyList->retain();

    return true;
}

bool ColliderDetector::init(Bone *bone)
{
    init();
    setBone(bone);

    return true;
}

void ColliderDetector::addContourData(ContourData *contourData)
{
    ColliderBody *colliderBody = new ColliderBody(contourData);
    _colliderBodyList->addObject(colliderBody);
    colliderBody->release();
}

void ColliderDetector::addContourDataList(Array *contourDataList)
{
    Object *object = NULL;
    CCARRAY_FOREACH(contourDataList, object)
    {
        addContourData((ContourData *)object);
    }
}

void ColliderDetector::removeContourData(ContourData *contourData)
{
	Object *object = NULL;
	CCARRAY_FOREACH(_colliderBodyList, object)
	{
		ColliderBody *body = (ColliderBody*)object;
		if (body && body->getContourData() == contourData)
		{
			_colliderBodyList->removeObject(body);
		}
	}
}

void ColliderDetector::removeAll()
{
    _colliderBodyList->removeAllObjects();
}


void ColliderDetector::setActive(bool active)
{
    if (_active == active)
    {
        return;
    }

    _active = active;

#if ENABLE_PHYSICS_BOX2D_DETECT
    if (_body)
    {
        if (active)
        {
            setBody(_body);
        }
        else
        {
            Object *object = NULL;
            CCARRAY_FOREACH(_colliderBodyList, object)
            {
                ColliderBody *colliderBody = (ColliderBody *)object;
                b2Fixture *fixture = colliderBody->getB2Fixture();

                b2Filter *filter = colliderBody->getB2Filter();
                *filter = fixture->GetFilterData();

                _body->DestroyFixture(fixture);
                colliderBody->setB2Fixture(NULL);
            }
        }
    }
#elif ENABLE_PHYSICS_CHIPMUNK_DETECT
    if (_body)
    {
        Object *object = NULL;
        if (_active)
        {
            CCARRAY_FOREACH(_colliderBodyList, object)
            {
                ColliderBody *colliderBody = (ColliderBody *)object;
                cpShape *shape = colliderBody->getShape();
                cpSpaceAddShape(_body->space_private, shape);
            }
        }
        else
        {
            CCARRAY_FOREACH(_colliderBodyList, object)
            {
                ColliderBody *colliderBody = (ColliderBody *)object;
                cpShape *shape = colliderBody->getShape();
                cpSpaceRemoveShape(_body->space_private, shape);
            }
        }
    }
#endif
}

bool ColliderDetector::getActive()
{
    return _active;
}

Array *ColliderDetector::getColliderBodyList()
{
    return _colliderBodyList;
}


Point helpPoint;

void ColliderDetector::updateTransform(AffineTransform &t)
{
    if (!_active)
    {
        return;
    }

    Object *object = NULL;
    CCARRAY_FOREACH(_colliderBodyList, object)
    {
        ColliderBody *colliderBody = (ColliderBody *)object;
        ContourData *contourData = colliderBody->getContourData();

#if ENABLE_PHYSICS_BOX2D_DETECT
        b2PolygonShape *shape = NULL;
        if (_body != NULL)
        {
            shape = (b2PolygonShape *)colliderBody->getB2Fixture()->GetShape();
        }
#elif ENABLE_PHYSICS_CHIPMUNK_DETECT
        cpPolyShape *shape = NULL;
        if (_body != NULL)
        {
            shape = (cpPolyShape *)colliderBody->getShape();
        }
#endif

        int num = contourData->vertexList.count();
        ContourVertex2 **vs = (ContourVertex2 **)contourData->vertexList.data->arr;

        for (int i = 0; i < num; i++)
        {
            helpPoint.setPoint( vs[i]->x,  vs[i]->y);
            helpPoint = PointApplyAffineTransform(helpPoint, t);


#if ENABLE_PHYSICS_BOX2D_DETECT
            if (shape != NULL)
            {
                b2Vec2 &bv = shape->m_vertices[i];
                bv.Set(helpPoint.x / PT_RATIO, helpPoint.y / PT_RATIO);
            }
#elif ENABLE_PHYSICS_CHIPMUNK_DETECT
            if (shape != NULL)
            {
                cpVect v ;
                v.x = helpPoint.x;
                v.y = helpPoint.y;
                shape->verts[i] = v;
            }
#endif
        }

#if ENABLE_PHYSICS_CHIPMUNK_DETECT
        cpConvexHull(num, shape->verts, NULL, NULL, 0);
        for (int i = 0; i < num; i++)
        {
            cpVect b = shape->verts[(i + 1) % shape->numVerts];
            cpVect n = cpvnormalize(cpvperp(cpvsub(b, shape->verts[i])));

            shape->planes[i].n = n;
            shape->planes[i].d = cpvdot(n, shape->verts[i]);
        }
#endif
    }
}

#if ENABLE_PHYSICS_BOX2D_DETECT

void ColliderDetector::setBody(b2Body *pBody)
{
    _body = pBody;

    Object *object = NULL;
    CCARRAY_FOREACH(_colliderBodyList, object)
    {
        ColliderBody *colliderBody = (ColliderBody *)object;

        ContourData *contourData = colliderBody->getContourData();
        const Array *array = &contourData->vertexList;
        Object *object = NULL;

        b2Vec2 *b2bv = new b2Vec2[contourData->vertexList.count()];

        int i = 0;
        CCARRAY_FOREACH(array, object)
        {
            ContourVertex2 *v = (ContourVertex2 *)object;
            b2bv[i].Set(v->x / PT_RATIO, v->y / PT_RATIO);
            i++;
        }

        b2PolygonShape polygon;
        polygon.Set(b2bv, contourData->vertexList.count());

        CC_SAFE_DELETE(b2bv);

        b2FixtureDef fixtureDef;
        fixtureDef.shape = &polygon;
        fixtureDef.isSensor = true;

        b2Fixture *fixture = _body->CreateFixture(&fixtureDef);
        fixture->SetUserData(_bone);

        if (colliderBody->getB2Fixture() != NULL)
        {
            _body->DestroyFixture(colliderBody->getB2Fixture());
        }
        colliderBody->setB2Fixture(fixture);

        if (colliderBody->getB2Filter() == NULL)
        {
            b2Filter *filter = new b2Filter;
            colliderBody->setB2Filter(filter);
        }
        else
        {
            fixture->SetFilterData(*colliderBody->getB2Filter());
        }
    }
}

b2Body *ColliderDetector::getBody()
{
    return _body;
}

#elif ENABLE_PHYSICS_CHIPMUNK_DETECT
void ColliderDetector::setBody(cpBody *pBody)
{
    _body = pBody;

    Object *object = NULL;
    CCARRAY_FOREACH(_colliderBodyList, object)
    {
        ColliderBody *colliderBody = (ColliderBody *)object;

        ContourData *contourData = colliderBody->getContourData();

        int num = contourData->vertexList.count();
        ContourVertex2 **vs = (ContourVertex2 **)contourData->vertexList.data->arr;
        cpVect *verts = new cpVect[num];
        for (int i = 0; i < num; i++)
        {
            verts[num - 1 - i].x = vs[i]->x;
            verts[num - 1 - i].y = vs[i]->y;
        }

        cpShape *shape = cpPolyShapeNew(_body, num, verts, cpvzero);

        shape->sensor = true;
        shape->data = _bone;
        cpSpaceAddShape(_body->space_private, shape);

        colliderBody->setShape(shape);

        delete []verts;
    }
}

cpBody *ColliderDetector::getBody()
{
    return _body;
}

#endif


NS_CC_EXT_ARMATURE_END