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/** @file  FBXAnimation.cpp

 *  @brief Assimp::FBX::AnimationCurve, Assimp::FBX::AnimationCurveNode,

 *         Assimp::FBX::AnimationLayer, Assimp::FBX::AnimationStack

 */

#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER

#include "FBXDocument.h"

#include "FBXDocumentUtil.h"

#include "FBXImporter.h"

#include "FBXParser.h"

namespace Assimp {

namespace FBX {

using namespace Util;

// ------------------------------------------------------------------------------------------------

AnimationCurve::AnimationCurve(uint64_t id, const Element &element, const std::string &name, const Document & /*doc*/) :

        Object(id, element, name) {

    const Scope &sc = GetRequiredScope(element);

    const Element &KeyTime = GetRequiredElement(sc, "KeyTime");

    const Element &KeyValueFloat = GetRequiredElement(sc, "KeyValueFloat");

    ParseVectorDataArray(keys, KeyTime);

    ParseVectorDataArray(values, KeyValueFloat);

    if (keys.size() != values.size()) {

        DOMError("the number of key times does not match the number of keyframe values", &KeyTime);

    }

    // check if the key times are well-ordered

    if (!std::equal(keys.begin(), keys.end() - 1, keys.begin() + 1, std::less<KeyTimeList::value_type>())) {

        DOMError("the keyframes are not in ascending order", &KeyTime);

    }

    const Element *KeyAttrDataFloat = sc["KeyAttrDataFloat"];

    if (KeyAttrDataFloat) {

        ParseVectorDataArray(attributes, *KeyAttrDataFloat);

    }

    const Element *KeyAttrFlags = sc["KeyAttrFlags"];

    if (KeyAttrFlags) {

        ParseVectorDataArray(flags, *KeyAttrFlags);

    }

}

// ------------------------------------------------------------------------------------------------

AnimationCurveNode::AnimationCurveNode(uint64_t id, const Element &element, const std::string &name,

        const Document &doc, const char *const *target_prop_whitelist /*= nullptr*/,

        size_t whitelist_size /*= 0*/) :

        Object(id, element, name), target(), doc(doc) {

    const Scope &sc = GetRequiredScope(element);

    // find target node

    const char *whitelist[] = { "Model", "NodeAttribute", "Deformer" };

    const std::vector<const Connection *> &conns = doc.GetConnectionsBySourceSequenced(ID(), whitelist, 3);

    for (const Connection *con : conns) {

        // link should go for a property

        if (!con->PropertyName().length()) {

            continue;

        }

        if (target_prop_whitelist) {

            const char *const s = con->PropertyName().c_str();

            bool ok = false;

            for (size_t i = 0; i < whitelist_size; ++i) {

                if (!strcmp(s, target_prop_whitelist[i])) {

                    ok = true;

                    break;

                }

            }

            if (!ok) {

                throw std::range_error("AnimationCurveNode target property is not in whitelist");

            }

        }

        const Object *const ob = con->DestinationObject();

        if (!ob) {

            DOMWarning("failed to read destination object for AnimationCurveNode->Model link, ignoring", &element);

            continue;

        }

        target = ob;

        if (!target) {

            continue;

        }

        prop = con->PropertyName();

        break;

    }

    if (!target) {

        DOMWarning("failed to resolve target Model/NodeAttribute/Constraint for AnimationCurveNode", &element);

    }

    props = GetPropertyTable(doc, "AnimationCurveNode.FbxAnimCurveNode", element, sc, false);

}

// ------------------------------------------------------------------------------------------------

const AnimationCurveMap &AnimationCurveNode::Curves() const {

    if (!curves.empty()) {

        return curves;

    }

    // resolve attached animation curves

    const std::vector<const Connection *> &conns = doc.GetConnectionsByDestinationSequenced(ID(), "AnimationCurve");

    for (const Connection *con : conns) {

        // link should go for a property

        if (!con->PropertyName().length()) {

            continue;

        }

        const Object *const ob = con->SourceObject();

        if (nullptr == ob) {

            DOMWarning("failed to read source object for AnimationCurve->AnimationCurveNode link, ignoring", &element);

            continue;

        }

        const AnimationCurve *const anim = dynamic_cast<const AnimationCurve *>(ob);

        if (nullptr == anim) {

            DOMWarning("source object for ->AnimationCurveNode link is not an AnimationCurve", &element);

            continue;

        }

        curves[con->PropertyName()] = anim;

    }

    return curves;

}

// ------------------------------------------------------------------------------------------------

AnimationLayer::AnimationLayer(uint64_t id, const Element &element, const std::string &name, const Document &doc) :

        Object(id, element, name), doc(doc) {

    const Scope &sc = GetRequiredScope(element);

    // note: the props table here bears little importance and is usually absent

    props = GetPropertyTable(doc, "AnimationLayer.FbxAnimLayer", element, sc, true);

}

// ------------------------------------------------------------------------------------------------

AnimationCurveNodeList AnimationLayer::Nodes(const char *const *target_prop_whitelist /*= nullptr*/,

        size_t whitelist_size /*= 0*/) const {

    AnimationCurveNodeList nodes;

    // resolve attached animation nodes

    const std::vector<const Connection *> &conns = doc.GetConnectionsByDestinationSequenced(ID(), "AnimationCurveNode");

    nodes.reserve(conns.size());

    for (const Connection *con : conns) {

        // link should not go to a property

        if (con->PropertyName().length()) {

            continue;

        }

        const Object *const ob = con->SourceObject();

        if (!ob) {

            DOMWarning("failed to read source object for AnimationCurveNode->AnimationLayer link, ignoring", &element);

            continue;

        }

        const AnimationCurveNode *const anim = dynamic_cast<const AnimationCurveNode *>(ob);

        if (!anim) {

            DOMWarning("source object for ->AnimationLayer link is not an AnimationCurveNode", &element);

            continue;

        }

        if (target_prop_whitelist) {

            const char *s = anim->TargetProperty().c_str();

            bool ok = false;

            for (size_t i = 0; i < whitelist_size; ++i) {

                if (!strcmp(s, target_prop_whitelist[i])) {

                    ok = true;

                    break;

                }

            }

            if (!ok) {

                continue;

            }

        }

        nodes.push_back(anim);

    }

    return nodes; // pray for NRVO

}

// ------------------------------------------------------------------------------------------------

AnimationStack::AnimationStack(uint64_t id, const Element &element, const std::string &name, const Document &doc) :

        Object(id, element, name) {

    const Scope &sc = GetRequiredScope(element);

    // note: we don't currently use any of these properties so we shouldn't bother if it is missing

    props = GetPropertyTable(doc, "AnimationStack.FbxAnimStack", element, sc, true);

    // resolve attached animation layers

    const std::vector<const Connection *> &conns = doc.GetConnectionsByDestinationSequenced(ID(), "AnimationLayer");

    layers.reserve(conns.size());

    for (const Connection *con : conns) {

        // link should not go to a property

        if (con->PropertyName().length()) {

            continue;

        }

        const Object *const ob = con->SourceObject();

        if (!ob) {

            DOMWarning("failed to read source object for AnimationLayer->AnimationStack link, ignoring", &element);

            continue;

        }

        const AnimationLayer *const anim = dynamic_cast<const AnimationLayer *>(ob);

        if (!anim) {

            DOMWarning("source object for ->AnimationStack link is not an AnimationLayer", &element);

            continue;

        }

        layers.push_back(anim);

    }

}

} // namespace FBX

} // namespace Assimp

#endif // ASSIMP_BUILD_NO_FBX_IMPORTER