/******************************************************************************
 * Spine Runtimes Software License
 * Version 2.1
 * 
 * Copyright (c) 2013, Esoteric Software
 * All rights reserved.
 * 
 * You are granted a perpetual, non-exclusive, non-sublicensable and
 * non-transferable license to install, execute and perform the Spine Runtimes
 * Software (the "Software") solely for internal use. Without the written
 * permission of Esoteric Software (typically granted by licensing Spine), you
 * may not (a) modify, translate, adapt or otherwise create derivative works,
 * improvements of the Software or develop new applications using the Software
 * or (b) remove, delete, alter or obscure any trademarks or any copyright,
 * trademark, patent or other intellectual property or proprietary rights
 * notices on or in the Software, including any copy thereof. Redistributions
 * in binary or source form must include this license and terms.
 * 
 * THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL ESOTERIC SOFTARE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *****************************************************************************/

#include <spine/CCSkeleton.h>
#include <spine/spine-cocos2dx.h>
#include <algorithm>

USING_NS_CC;
using std::min;
using std::max;

namespace spine {

CCSkeleton* CCSkeleton::createWithData (spSkeletonData* skeletonData, bool ownsSkeletonData) {
	CCSkeleton* node = new CCSkeleton(skeletonData, ownsSkeletonData);
	node->autorelease();
	return node;
}

CCSkeleton* CCSkeleton::createWithFile (const char* skeletonDataFile, spAtlas* atlas, float scale) {
	CCSkeleton* node = new CCSkeleton(skeletonDataFile, atlas, scale);
	node->autorelease();
	return node;
}

CCSkeleton* CCSkeleton::createWithFile (const char* skeletonDataFile, const char* atlasFile, float scale) {
	CCSkeleton* node = new CCSkeleton(skeletonDataFile, atlasFile, scale);
	node->autorelease();
	return node;
}

void CCSkeleton::initialize () {
	atlas = 0;
	debugSlots = false;
	debugBones = false;
	timeScale = 1;

	blendFunc.src = GL_ONE;
	blendFunc.dst = GL_ONE_MINUS_SRC_ALPHA;
	setOpacityModifyRGB(true);

	setShaderProgram(CCShaderCache::sharedShaderCache()->programForKey(kCCShader_PositionTextureColor));
	scheduleUpdate();
}

void CCSkeleton::setSkeletonData (spSkeletonData *skeletonData, bool ownsSkeletonData) {
	skeleton = spSkeleton_create(skeletonData);
	rootBone = skeleton->bones[0];
	this->ownsSkeletonData = ownsSkeletonData;	
}

CCSkeleton::CCSkeleton () {
	initialize();
}

CCSkeleton::CCSkeleton (spSkeletonData *skeletonData, bool ownsSkeletonData) {
	initialize();

	setSkeletonData(skeletonData, ownsSkeletonData);
}

CCSkeleton::CCSkeleton (const char* skeletonDataFile, spAtlas* atlas, float scale) {
	initialize();

	spSkeletonJson* json = spSkeletonJson_create(atlas);
	json->scale = scale == 0 ? (1 / CCDirector::sharedDirector()->getContentScaleFactor()) : scale;
	spSkeletonData* skeletonData = spSkeletonJson_readSkeletonDataFile(json, skeletonDataFile);
	CCAssert(skeletonData, json->error ? json->error : "Error reading skeleton data.");
	spSkeletonJson_dispose(json);

	setSkeletonData(skeletonData, true);
}

CCSkeleton::CCSkeleton (const char* skeletonDataFile, const char* atlasFile, float scale) {
	initialize();

	atlas = spAtlas_readAtlasFile(atlasFile);
	CCAssert(atlas, "Error reading atlas file.");

	spSkeletonJson* json = spSkeletonJson_create(atlas);
	json->scale = scale == 0 ? (1 / CCDirector::sharedDirector()->getContentScaleFactor()) : scale;
	spSkeletonData* skeletonData = spSkeletonJson_readSkeletonDataFile(json, skeletonDataFile);
	CCAssert(skeletonData, json->error ? json->error : "Error reading skeleton data file.");
	spSkeletonJson_dispose(json);

	setSkeletonData(skeletonData, true);
}

CCSkeleton::~CCSkeleton () {
	if (ownsSkeletonData) spSkeletonData_dispose(skeleton->data);
	if (atlas) spAtlas_dispose(atlas);
	spSkeleton_dispose(skeleton);
}

void CCSkeleton::update (float deltaTime) {
	spSkeleton_update(skeleton, deltaTime * timeScale);
}

void CCSkeleton::draw () {
	CC_NODE_DRAW_SETUP();

	ccGLBlendFunc(blendFunc.src, blendFunc.dst);
	ccColor3B color = getColor();
	skeleton->r = color.r / (float)255;
	skeleton->g = color.g / (float)255;
	skeleton->b = color.b / (float)255;
	skeleton->a = getOpacity() / (float)255;

	int additive = 0;
	CCTextureAtlas* textureAtlas = 0;
	ccV3F_C4B_T2F_Quad quad;
	quad.tl.vertices.z = 0;
	quad.tr.vertices.z = 0;
	quad.bl.vertices.z = 0;
	quad.br.vertices.z = 0;
	for (int i = 0, n = skeleton->slotCount; i < n; i++) {
		spSlot* slot = skeleton->drawOrder[i];
		if (!slot->attachment || slot->attachment->type != ATTACHMENT_REGION) continue;
		spRegionAttachment* attachment = (spRegionAttachment*)slot->attachment;
		CCTextureAtlas* regionTextureAtlas = getTextureAtlas(attachment);

		if (slot->data->additiveBlending != additive) {
			if (textureAtlas) {
				textureAtlas->drawQuads();
				textureAtlas->removeAllQuads();
			}
			additive = !additive;
			ccGLBlendFunc(blendFunc.src, additive ? GL_ONE : blendFunc.dst);
		} else if (regionTextureAtlas != textureAtlas && textureAtlas) {
			textureAtlas->drawQuads();
			textureAtlas->removeAllQuads();
		}
		textureAtlas = regionTextureAtlas;

		int quadCount = textureAtlas->getTotalQuads();
		if (textureAtlas->getCapacity() == quadCount) {
			textureAtlas->drawQuads();
			textureAtlas->removeAllQuads();
			if (!textureAtlas->resizeCapacity(textureAtlas->getCapacity() * 2)) return;
		}

		spRegionAttachment_updateQuad(attachment, slot, &quad, premultipliedAlpha);
		textureAtlas->updateQuad(&quad, quadCount);
	}
	if (textureAtlas) {
		textureAtlas->drawQuads();
		textureAtlas->removeAllQuads();
	}

	if (debugSlots) {
		// Slots.
		ccDrawColor4B(0, 0, 255, 255);
		glLineWidth(1);
		CCPoint points[4];
		ccV3F_C4B_T2F_Quad quad;
		for (int i = 0, n = skeleton->slotCount; i < n; i++) {
			spSlot* slot = skeleton->drawOrder[i];
			if (!slot->attachment || slot->attachment->type != ATTACHMENT_REGION) continue;
			spRegionAttachment* attachment = (spRegionAttachment*)slot->attachment;
			spRegionAttachment_updateQuad(attachment, slot, &quad);
			points[0] = ccp(quad.bl.vertices.x, quad.bl.vertices.y);
			points[1] = ccp(quad.br.vertices.x, quad.br.vertices.y);
			points[2] = ccp(quad.tr.vertices.x, quad.tr.vertices.y);
			points[3] = ccp(quad.tl.vertices.x, quad.tl.vertices.y);
			ccDrawPoly(points, 4, true);
		}
	}
	if (debugBones) {
		// Bone lengths.
		glLineWidth(2);
		ccDrawColor4B(255, 0, 0, 255);
		for (int i = 0, n = skeleton->boneCount; i < n; i++) {
			spBone *bone = skeleton->bones[i];
			float x = bone->data->length * bone->m00 + bone->worldX;
			float y = bone->data->length * bone->m10 + bone->worldY;
			ccDrawLine(ccp(bone->worldX, bone->worldY), ccp(x, y));
		}
		// Bone origins.
		ccPointSize(4);
		ccDrawColor4B(0, 0, 255, 255); // Root bone is blue.
		for (int i = 0, n = skeleton->boneCount; i < n; i++) {
			spBone *bone = skeleton->bones[i];
			ccDrawPoint(ccp(bone->worldX, bone->worldY));
			if (i == 0) ccDrawColor4B(0, 255, 0, 255);
		}
	}
}

CCTextureAtlas* CCSkeleton::getTextureAtlas (spRegionAttachment* regionAttachment) const {
	return (CCTextureAtlas*)((spAtlasRegion*)regionAttachment->rendererObject)->page->rendererObject;
}

CCRect CCSkeleton::boundingBox () {
	float minX = FLT_MAX, minY = FLT_MAX, maxX = FLT_MIN, maxY = FLT_MIN;
	float scaleX = getScaleX();
	float scaleY = getScaleY();
	float vertices[8];
	for (int i = 0; i < skeleton->slotCount; ++i) {
		spSlot* slot = skeleton->slots[i];
		if (!slot->attachment || slot->attachment->type != ATTACHMENT_REGION) continue;
		spRegionAttachment* attachment = (spRegionAttachment*)slot->attachment;
		spRegionAttachment_computeWorldVertices(attachment, slot->skeleton->x, slot->skeleton->y, slot->bone, vertices);
		minX = min(minX, vertices[VERTEX_X1] * scaleX);
		minY = min(minY, vertices[VERTEX_Y1] * scaleY);
		maxX = max(maxX, vertices[VERTEX_X1] * scaleX);
		maxY = max(maxY, vertices[VERTEX_Y1] * scaleY);
		minX = min(minX, vertices[VERTEX_X4] * scaleX);
		minY = min(minY, vertices[VERTEX_Y4] * scaleY);
		maxX = max(maxX, vertices[VERTEX_X4] * scaleX);
		maxY = max(maxY, vertices[VERTEX_Y4] * scaleY);
		minX = min(minX, vertices[VERTEX_X2] * scaleX);
		minY = min(minY, vertices[VERTEX_Y2] * scaleY);
		maxX = max(maxX, vertices[VERTEX_X2] * scaleX);
		maxY = max(maxY, vertices[VERTEX_Y2] * scaleY);
		minX = min(minX, vertices[VERTEX_X3] * scaleX);
		minY = min(minY, vertices[VERTEX_Y3] * scaleY);
		maxX = max(maxX, vertices[VERTEX_X3] * scaleX);
		maxY = max(maxY, vertices[VERTEX_Y3] * scaleY);
	}
	CCPoint position = getPosition();
	return CCRectMake(position.x + minX, position.y + minY, maxX - minX, maxY - minY);
}

// --- Convenience methods for Skeleton_* functions.

void CCSkeleton::updateWorldTransform () {
	spSkeleton_updateWorldTransform(skeleton);
}

void CCSkeleton::setToSetupPose () {
	spSkeleton_setToSetupPose(skeleton);
}
void CCSkeleton::setBonesToSetupPose () {
	spSkeleton_setBonesToSetupPose(skeleton);
}
void CCSkeleton::setSlotsToSetupPose () {
	spSkeleton_setSlotsToSetupPose(skeleton);
}

spBone* CCSkeleton::findBone (const char* boneName) const {
	return spSkeleton_findBone(skeleton, boneName);
}

spSlot* CCSkeleton::findSlot (const char* slotName) const {
	return spSkeleton_findSlot(skeleton, slotName);
}

bool CCSkeleton::setSkin (const char* skinName) {
	return spSkeleton_setSkinByName(skeleton, skinName) ? true : false;
}

spAttachment* CCSkeleton::getAttachment (const char* slotName, const char* attachmentName) const {
	return spSkeleton_getAttachmentForSlotName(skeleton, slotName, attachmentName);
}
bool CCSkeleton::setAttachment (const char* slotName, const char* attachmentName) {
	return spSkeleton_setAttachment(skeleton, slotName, attachmentName) ? true : false;
}

// --- CCBlendProtocol

ccBlendFunc CCSkeleton::getBlendFunc () {
    return blendFunc;
}

void CCSkeleton::setBlendFunc (ccBlendFunc blendFunc) {
    this->blendFunc = blendFunc;
}

void CCSkeleton::setOpacityModifyRGB (bool value) {
	premultipliedAlpha = value;
}

bool CCSkeleton::isOpacityModifyRGB () {
	return premultipliedAlpha;
}

}