/******************************************************************************
* Spine Runtimes Software License v2.5
*
* Copyright (c) 2013-2016, Esoteric Software
* All rights reserved.
*
* You are granted a perpetual, non-exclusive, non-sublicensable, and
* non-transferable license to use, install, execute, and perform the Spine
* Runtimes software and derivative works solely for personal or internal
* use. Without the written permission of Esoteric Software (see Section 2 of
* the Spine Software License Agreement), you may not (a) modify, translate,
* adapt, or develop new applications using the Spine Runtimes or otherwise
* create derivative works or improvements of the Spine Runtimes 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 SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, BUSINESS INTERRUPTION, OR LOSS OF
* USE, DATA, OR PROFITS) 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/AnimationStateData.h>

#include <spine/SkeletonData.h>
#include <spine/Animation.h>

namespace Spine {
    AnimationStateData::AnimationStateData(SkeletonData& skeletonData) : _skeletonData(skeletonData), _defaultMix(0) {
        // Empty
    }
    
    void AnimationStateData::setMix(std::string fromName, std::string toName, float duration) {
        Animation* from = _skeletonData.findAnimation(fromName);
        Animation* to = _skeletonData.findAnimation(toName);
        
        setMix(from, to, duration);
    }
    
    void AnimationStateData::setMix(Animation* from, Animation* to, float duration) {
        assert(from != NULL);
        assert(to != NULL);
        
        AnimationPair key(from, to);
        HashMap<AnimationPair, float, HashAnimationPair>::Iterator i = _animationToMixTime.find(key);
        _animationToMixTime.erase(i);
        _animationToMixTime.insert(key, duration);
    }
    
    float AnimationStateData::getMix(Animation* from, Animation* to) {
        assert(from != NULL);
        assert(to != NULL);
        
        AnimationPair key(from, to);
        
        HashMap<AnimationPair, float, HashAnimationPair>::Iterator i = _animationToMixTime.find(key);
        
        if (i != _animationToMixTime.end()) {
            return i.second();
        }
        
        return _defaultMix;
    }
    
    SkeletonData& AnimationStateData::getSkeletonData() {
        return _skeletonData;
    }
    
    float AnimationStateData::getDefaultMix() {
        return _defaultMix;
    }
    
    void AnimationStateData::setDefaultMix(float inValue) {
        _defaultMix = inValue;
    }
    
    AnimationStateData::AnimationPair::AnimationPair(Animation* a1, Animation* a2) : _a1(a1), _a2(a2) {
        // Empty
    }
    
    bool AnimationStateData::AnimationPair::operator==(const AnimationPair &other) const {
        return _a1->_name == other._a1->_name && _a2->_name == other._a2->_name;
    }
    
    std::size_t AnimationStateData::HashAnimationPair::operator()(const Spine::AnimationStateData::AnimationPair& val) const {
        std::size_t h1 = 7;
        size_t strlen = val._a1->_name.length();
        for (int i = 0; i < strlen; ++i) {
            h1 = h1 * 31 + val._a1->_name.at(i);
        }
        
        std::size_t h2 = 7;
        strlen = val._a2->_name.length();
        for (int i = 0; i < strlen; ++i) {
            h2 = h2 * 31 + val._a2->_name.at(i);
        }
        
        return (((h1 << 5) + h1) ^ h2);
    }
}