/****************************************************************************
 Copyright (c) 2013      Zynga Inc.

 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
 copies of the Software, and to permit persons to whom the Software is
 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.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 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 "CCFontFNT.h"
#include "CCFontAtlas.h"

NS_CC_BEGIN

FontFNT * FontFNT::create(const std::string& fntFilePath)
{
    CCBMFontConfiguration *newConf = FNTConfigLoadFile(fntFilePath);
    if (!newConf)
        return nullptr;
    
    // add the texture
    Texture2D *tempTexture = TextureCache::getInstance()->addImage(newConf->getAtlasName());
    if (!tempTexture)
    {
        delete newConf;
        return nullptr;
    }
    
    FontFNT *tempFont =  new FontFNT(newConf);
    
    if (!tempFont)
    {
        delete newConf;
        return nullptr;
    }
    tempFont->autorelease();
    return tempFont;
}

FontFNT::~FontFNT()
{

}

Size * FontFNT::getAdvancesForTextUTF16(unsigned short *text, int &outNumLetters) const
{
    if (!text)
        return 0;
    
    outNumLetters = cc_wcslen(text);
    
    if (!outNumLetters)
        return 0;
    
    Size *sizes = new Size[outNumLetters];
    if (!sizes)
        return 0;
    
    for (int c = 0; c < outNumLetters; ++c)
    {
        int advance = 0;
        int kerning = 0;
        
        advance = getAdvanceForChar(text[c]);
        
        if (c < (outNumLetters-1))
            kerning = getHorizontalKerningForChars(text[c], text[c+1]);
        
        sizes[c].width = (advance + kerning);
    }
    
    return sizes;
}

int  FontFNT::getAdvanceForChar(unsigned short theChar) const
{
    tFontDefHashElement *element = nullptr;
    
    // unichar is a short, and an int is needed on HASH_FIND_INT
    unsigned int key = theChar;
    HASH_FIND_INT(_configuration->_fontDefDictionary, &key, element);
    if (! element)
        return -1;
    
    return element->fontDef.xAdvance;
}

int  FontFNT::getHorizontalKerningForChars(unsigned short firstChar, unsigned short secondChar) const
{
    int ret = 0;
    unsigned int key = (firstChar << 16) | (secondChar & 0xffff);
    
    if (_configuration->_kerningDictionary)
    {
        tKerningHashElement *element = nullptr;
        HASH_FIND_INT(_configuration->_kerningDictionary, &key, element);
        
        if (element)
            ret = element->amount;
    }
    
    return ret;
}

Rect FontFNT::getRectForCharInternal(unsigned short theChar) const
{
    Rect retRect;
    ccBMFontDef fontDef;
    tFontDefHashElement *element = nullptr;
    unsigned int key = theChar;
    
    HASH_FIND_INT(_configuration->_fontDefDictionary, &key, element);
    
    if (element)
    {
        retRect = element->fontDef.rect;
    }
    
    return retRect;
}

Rect FontFNT::getRectForChar(unsigned short theChar) const
{
    return getRectForCharInternal(theChar);
}

FontAtlas * FontFNT::createFontAtlas()
{
    FontAtlas *tempAtlas = new FontAtlas(*this);
    if (!tempAtlas)
        return nullptr;
    
    // check that everything is fine with the BMFontCofniguration
    if (!_configuration->_fontDefDictionary)
        return nullptr;
    
    int numGlyphs = _configuration->_characterSet->size();
    if (!numGlyphs)
        return nullptr;
    
    if (_configuration->_commonHeight == 0)
        return nullptr;
    
    // commone height
    tempAtlas->setCommonLineHeight(_configuration->_commonHeight);
    
    
    ccBMFontDef fontDef;
    tFontDefHashElement *currentElement, *tmp;
    
    // Purge uniform hash
    HASH_ITER(hh, _configuration->_fontDefDictionary, currentElement, tmp)
    {
        
        FontLetterDefinition tempDefinition;
        
        fontDef = currentElement->fontDef;
        Rect tempRect;
        
        tempRect = fontDef.rect;
        tempRect = CC_RECT_PIXELS_TO_POINTS(tempRect);
        
        tempDefinition.letteCharUTF16 = fontDef.charID;
        
        tempDefinition.offsetX  = fontDef.xOffset;
        tempDefinition.offsetY  = fontDef.yOffset;
        
        tempDefinition.U        = tempRect.origin.x;
        tempDefinition.V        = tempRect.origin.y;
        
        tempDefinition.width    = tempRect.size.width;
        tempDefinition.height   = tempRect.size.height;
        
        //carloX: only one texture supported FOR NOW
        tempDefinition.textureID = 0;
        
        tempDefinition.anchorX = 0.5f;
        tempDefinition.anchorY = 0.5f;
        tempDefinition.validDefinition = true;
        // add the new definition
        tempAtlas->addLetterDefinition(tempDefinition);
    }
    
    // add the texture (only one texture for now)
    
    Texture2D *tempTexture = TextureCache::getInstance()->addImage(_configuration->getAtlasName());
    if (!tempTexture)
        return 0;
    
    // add the texture
    tempAtlas->addTexture(*tempTexture, 0);
    
    // done
    return tempAtlas;
}


NS_CC_END