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

http://www.cocos2d-x.org

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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furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

#include "CCArmature.h"
#include "utils/CCArmatureDataManager.h"
#include "utils/CCArmatureDefine.h"
#include "utils/CCDataReaderHelper.h"
#include "datas/CCDatas.h"
#include "display/CCSkin.h"

namespace cocos2d { namespace extension { namespace armature {

std::map<int, Armature *> Armature::_armatureIndexDic;

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


Armature *Armature::create(const char *_name)
{
    Armature *armature = new Armature();
    if (armature && armature->init(_name))
    {
        armature->autorelease();
        return armature;
    }
    CC_SAFE_DELETE(armature);
    return NULL;
}

Armature *Armature::create(const char *name, Bone *parentBone)
{
    Armature *armature = new Armature();
    if (armature && armature->init(name, parentBone))
    {
        armature->autorelease();
        return armature;
    }
    CC_SAFE_DELETE(armature);
    return NULL;
}

Armature::Armature()
    : _animation(NULL)
	, _armatureData(NULL)
	, _batchNode(NULL)
    , _atlas(NULL)
	, _parentBone(NULL)
	, _boneDic(NULL)
    , _topBoneList(NULL)
{
}


Armature::~Armature(void)
{
    if(NULL != _boneDic)
    {
        _boneDic->removeAllObjects();
        CC_SAFE_DELETE(_boneDic);
    }
    if (NULL != _topBoneList)
    {
        _topBoneList->removeAllObjects();
        CC_SAFE_DELETE(_topBoneList);
    }
    CC_SAFE_DELETE(_animation);
}


bool Armature::init()
{
    return init(NULL);
}


bool Armature::init(const char *name)
{
    bool bRet = false;
    do
    {
        removeAllChildren();

        CC_SAFE_DELETE(_animation);
        _animation = new ArmatureAnimation();
        _animation->init(this);

        CC_SAFE_DELETE(_boneDic);
        _boneDic	= new Dictionary();

        CC_SAFE_DELETE(_topBoneList);
        _topBoneList = new Array();
        _topBoneList->init();


        _blendFunc.src = CC_BLEND_SRC;
        _blendFunc.dst = CC_BLEND_DST;


        _name = name == NULL ? "" : name;

        ArmatureDataManager *armatureDataManager = ArmatureDataManager::sharedArmatureDataManager();

        if(_name.length() != 0)
        {
            _name = name;

            AnimationData *animationData = armatureDataManager->getAnimationData(name);
            CCASSERT(animationData, "CCAnimationData not exist! ");

            _animation->setAnimationData(animationData);


            ArmatureData *armatureData = armatureDataManager->getArmatureData(name);
            CCASSERT(armatureData, "");

            _armatureData = armatureData;


            DictElement *_element = NULL;
            Dictionary *boneDataDic = &armatureData->boneDataDic;
            CCDICT_FOREACH(boneDataDic, _element)
            {
                Bone *bone = createBone(_element->getStrKey());

                //! init bone's  Tween to 1st movement's 1st frame
                do
                {

                    MovementData *movData = animationData->getMovement(animationData->movementNames.at(0).c_str());
                    CC_BREAK_IF(!movData);

                    MovementBoneData *movBoneData = movData->getMovementBoneData(bone->getName().c_str());
                    CC_BREAK_IF(!movBoneData || movBoneData->frameList.count() <= 0);

                    FrameData *frameData = movBoneData->getFrameData(0);
                    CC_BREAK_IF(!frameData);

                    bone->getTweenData()->copy(frameData);
                    bone->changeDisplayByIndex(frameData->displayIndex, false);
                }
                while (0);
            }

            update(0);
            updateOffsetPoint();
        }
        else
        {
            _name = "new_armature";
            _armatureData = ArmatureData::create();
            _armatureData->name = _name;

            AnimationData *animationData = AnimationData::create();
            animationData->name = _name;

            armatureDataManager->addArmatureData(_name.c_str(), _armatureData);
            armatureDataManager->addAnimationData(_name.c_str(), animationData);

            _animation->setAnimationData(animationData);

        }

        setShaderProgram(ShaderCache::getInstance()->programForKey(GLProgram::SHADER_NAME_POSITION_TEXTURE_COLOR));

        unscheduleUpdate();
        scheduleUpdate();

        setCascadeOpacityEnabled(true);
        setCascadeColorEnabled(true);

        bRet = true;
    }
    while (0);

    return bRet;
}

bool Armature::init(const char *name, Bone *parentBone)
{
    _parentBone = parentBone;
    return init(name);
}


Bone *Armature::createBone(const char *boneName)
{
    Bone *existedBone = getBone(boneName);
    if(existedBone != NULL)
        return existedBone;

    BoneData *boneData = (BoneData *)_armatureData->getBoneData(boneName);
    std::string parentName = boneData->parentName;

    Bone *bone = NULL;

    if( parentName.length() != 0 )
    {
        createBone(parentName.c_str());
        bone = Bone::create(boneName);
        addBone(bone, parentName.c_str());
    }
    else
    {
        bone = Bone::create(boneName);
        addBone(bone, "");
    }

    bone->setBoneData(boneData);
    bone->getDisplayManager()->changeDisplayByIndex(-1, false);

    return bone;
}


void Armature::addBone(Bone *bone, const char *parentName)
{
    CCASSERT( bone != NULL, "Argument must be non-nil");
    CCASSERT(_boneDic->objectForKey(bone->getName()) == NULL, "bone already added. It can't be added again");

    if (NULL != parentName)
    {
        Bone *boneParent = (Bone *)_boneDic->objectForKey(parentName);
        if (boneParent)
        {
            boneParent->addChildBone(bone);
        }
        else
        {
            if (_parentBone)
                _parentBone->addChildBone(bone);
            else
                _topBoneList->addObject(bone);
        }
    }
    else
    {
        if (_parentBone)
            _parentBone->addChildBone(bone);
        else
            _topBoneList->addObject(bone);
    }

    bone->setArmature(this);

    _boneDic->setObject(bone, bone->getName());
    addChild(bone);
}


void Armature::removeBone(Bone *bone, bool recursion)
{
    CCASSERT(bone != NULL, "bone must be added to the bone dictionary!");

    bone->setArmature(NULL);
    bone->removeFromParent(recursion);

    if (_topBoneList->containsObject(bone))
    {
        _topBoneList->removeObject(bone);
    }
    _boneDic->removeObjectForKey(bone->getName());
    removeChild(bone, true);
}


Bone *Armature::getBone(const char *_name) const
{
    return (Bone *)_boneDic->objectForKey(_name);
}


void Armature::changeBoneParent(Bone *bone, const char *parentName)
{
    CCASSERT(bone != NULL, "bone must be added to the bone dictionary!");

    bone->getParentBone()->getChildren()->removeObject(bone);
    bone->setParentBone(NULL);

    if (parentName != NULL)
    {
        Bone *boneParent = (Bone *)_boneDic->objectForKey(parentName);

        if (boneParent)
        {
            boneParent->addChildBone(bone);
        }
    }
}

Dictionary *Armature::getBoneDic()
{
    return _boneDic;
}

AffineTransform Armature::getNodeToParentTransform() const
{
    if (_transformDirty)
    {
        // Translate values
        float x = _position.x;
        float y = _position.y;

        if (_ignoreAnchorPointForPosition)
        {
            x += _anchorPointInPoints.x;
            y += _anchorPointInPoints.y;
        }

        // Rotation values
        // Change rotation code to handle X and Y
        // If we skew with the exact same value for both x and y then we're simply just rotating
        float cx = 1, sx = 0, cy = 1, sy = 0;
        if (_rotationX || _rotationY)
        {
            float radiansX = -CC_DEGREES_TO_RADIANS(_rotationX);
            float radiansY = -CC_DEGREES_TO_RADIANS(_rotationY);
            cx = cosf(radiansX);
            sx = sinf(radiansX);
            cy = cosf(radiansY);
            sy = sinf(radiansY);
        }

        // Add offset point
        x += cy * _offsetPoint.x * _scaleX + -sx * _offsetPoint.y * _scaleY;
        y += sy * _offsetPoint.x * _scaleX + cx * _offsetPoint.y * _scaleY;

        bool needsSkewMatrix = ( _skewX || _skewY );

        // optimization:
        // inline anchor point calculation if skew is not needed
        // Adjusted transform calculation for rotational skew
        if (! needsSkewMatrix && !_anchorPointInPoints.equals(Point::ZERO))
        {
            x += cy * -_anchorPointInPoints.x * _scaleX + -sx * -_anchorPointInPoints.y * _scaleY;
            y += sy * -_anchorPointInPoints.x * _scaleX +  cx * -_anchorPointInPoints.y * _scaleY;
        }


        // Build Transform Matrix
        // Adjusted transform calculation for rotational skew
        _transform = AffineTransformMake( cy * _scaleX,  sy * _scaleX,
                                              -sx * _scaleY, cx * _scaleY,
                                              x, y );

        // XXX: Try to inline skew
        // If skew is needed, apply skew and then anchor point
        if (needsSkewMatrix)
        {
            AffineTransform skewMatrix = AffineTransformMake(1.0f, tanf(CC_DEGREES_TO_RADIANS(_skewY)),
                                           tanf(CC_DEGREES_TO_RADIANS(_skewX)), 1.0f,
                                           0.0f, 0.0f );
            _transform = AffineTransformConcat(skewMatrix, _transform);

            // adjust anchor point
            if (!_anchorPointInPoints.equals(Point::ZERO))
            {
                _transform = AffineTransformTranslate(_transform, -_anchorPointInPoints.x, -_anchorPointInPoints.y);
            }
        }

        if (_additionalTransformDirty)
        {
            _transform = AffineTransformConcat(_transform, _additionalTransform);
            _additionalTransformDirty = false;
        }

        _transformDirty = false;
    }

    return _transform;
}

void Armature::updateOffsetPoint()
{
    // Set contentsize and Calculate anchor point.
    Rect rect = getBoundingBox();
    setContentSize(rect.size);
    _offsetPoint = Point(-rect.origin.x,  -rect.origin.y);
    setAnchorPoint(Point(_offsetPoint.x / rect.size.width, _offsetPoint.y / rect.size.height));
}


void Armature::update(float dt)
{
    _animation->update(dt);

    Object *object = NULL;
    CCARRAY_FOREACH(_topBoneList, object)
    {
        static_cast<Bone*>(object)->update(dt);
    }
}

void Armature::draw()
{
    if (_parentBone == NULL)
    {
        CC_NODE_DRAW_SETUP();
        ccGLBlendFunc(_blendFunc.src, _blendFunc.dst);
    }

    Object *object = NULL;
    CCARRAY_FOREACH(_children, object)
    {
        Bone *bone = static_cast<Bone *>(object);

        DisplayManager *displayManager = bone->getDisplayManager();
        Node *node = displayManager->getDisplayRenderNode();

        if (NULL == node)
            continue;

        if(Skin *skin = dynamic_cast<Skin *>(node))
        {
            TextureAtlas *textureAtlas = skin->getTextureAtlas();
            if(_atlas != textureAtlas)
            {
                if (_atlas)
                {
                    _atlas->drawQuads();
                    _atlas->removeAllQuads();
                }
            }

            _atlas = textureAtlas;
            if (_atlas->getCapacity() == _atlas->getTotalQuads() && !_atlas->resizeCapacity(_atlas->getCapacity() * 2))
                return;

            skin->draw();
        }
        else if(Armature *armature = dynamic_cast<Armature *>(node))
        {
            TextureAtlas *textureAtlas = armature->getTextureAtlas();

            if(_atlas != textureAtlas)
            {
                if (_atlas)
                {
                    _atlas->drawQuads();
                    _atlas->removeAllQuads();
                }
            }
            armature->draw();
        }
        else
        {
            if (_atlas)
            {
                _atlas->drawQuads();
                _atlas->removeAllQuads();
            }
            node->visit();

            CC_NODE_DRAW_SETUP();
            ccGLBlendFunc(_blendFunc.src, _blendFunc.dst);
        }
    }

    if(_atlas && !_batchNode && _parentBone == NULL)
    {
        _atlas->drawQuads();
        _atlas->removeAllQuads();
    }
}

void Armature::visit()
{
    // quick return if not visible. children won't be drawn.
    if (!_visible)
    {
        return;
    }
    kmGLPushMatrix();

    if (_grid && _grid->isActive())
    {
        _grid->beforeDraw();
    }

    transform();
    sortAllChildren();
    draw();

    // reset for next frame
    _orderOfArrival = 0;

    if (_grid && _grid->isActive())
    {
        _grid->afterDraw(this);
    }

    kmGLPopMatrix();
}

Rect Armature::getBoundingBox() const
{
    float minx, miny, maxx, maxy = 0;

    bool first = true;

    Rect boundingBox = Rect(0, 0, 0, 0);

    Object *object = NULL;
    CCARRAY_FOREACH(_children, object)
    {
        Bone *bone = static_cast<Bone *>(object);
        Rect r = bone->getDisplayManager()->getBoundingBox();

        if(first)
        {
            minx = r.getMinX();
            miny = r.getMinY();
            maxx = r.getMaxX();
            maxy = r.getMaxY();

            first = false;
        }
        else
        {
            minx = r.getMinX() < boundingBox.getMinX() ? r.getMinX() : boundingBox.getMinX();
            miny = r.getMinY() < boundingBox.getMinY() ? r.getMinY() : boundingBox.getMinY();
            maxx = r.getMaxX() > boundingBox.getMaxX() ? r.getMaxX() : boundingBox.getMaxX();
            maxy = r.getMaxY() > boundingBox.getMaxY() ? r.getMaxY() : boundingBox.getMaxY();
        }

        boundingBox.setRect(minx, miny, maxx - minx, maxy - miny);
    }

    return boundingBox;
}

Bone *Armature::getBoneAtPoint(float x, float y)
{
    int length = _children->data->num;
    Bone **bs = (Bone **)_children->data->arr;

    for(int i = length - 1; i >= 0; i--)
    {
        if(bs[i]->getDisplayManager()->containPoint(x, y))
        {
            return bs[i];
        }
    }
    return NULL;
}

}}} // namespace cocos2d { namespace extension { namespace armature {