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/// \file   X3DImporter_Light.cpp
/// \brief  Parsing data from nodes of "Lighting" set of X3D.
/// date   2015-2016
/// author smal.root@gmail.com

#ifndef ASSIMP_BUILD_NO_X3D_IMPORTER

#include "X3DImporter.hpp"
#include "X3DImporter_Macro.hpp"
#include "X3DXmlHelper.h"
#include <assimp/StringUtils.h>

namespace Assimp {

// <DirectionalLight
// DEF=""               ID
// USE=""               IDREF
// ambientIntensity="0" SFFloat [inputOutput]
// color="1 1 1"        SFColor [inputOutput]
// direction="0 0 -1"   SFVec3f [inputOutput]
// global="false"       SFBool  [inputOutput]
// intensity="1"        SFFloat [inputOutput]
// on="true"            SFBool  [inputOutput]
// />
void X3DImporter::readDirectionalLight(XmlNode &node) {
    std::string def, use;
    float ambientIntensity = 0;
    aiColor3D color(1, 1, 1);
    aiVector3D direction(0, 0, -1);
    bool global = false;
    float intensity = 1;
    bool on = true;
    X3DNodeElementBase *ne(nullptr);

    MACRO_ATTRREAD_CHECKUSEDEF_RET(node, def, use);
    XmlParser::getFloatAttribute(node, "ambientIntensity", ambientIntensity);
    X3DXmlHelper::getColor3DAttribute(node, "color", color);
    X3DXmlHelper::getVector3DAttribute(node, "direction", direction);
    XmlParser::getBoolAttribute(node, "global", global);
    XmlParser::getFloatAttribute(node, "intensity", intensity);
    XmlParser::getBoolAttribute(node, "on", on);

    // if "USE" defined then find already defined element.
    if (!use.empty()) {
        MACRO_USE_CHECKANDAPPLY(node, def, use, ENET_DirectionalLight, ne);
    } else {
        if (on) {
            // create and if needed - define new geometry object.
            ne = new X3DNodeElementLight(X3DElemType::ENET_DirectionalLight, mNodeElementCur);
            if (!def.empty())
                ne->ID = def;
            else
                ne->ID = "DirectionalLight_" + ai_to_string((size_t)ne); // make random name

            ((X3DNodeElementLight *)ne)->AmbientIntensity = ambientIntensity;
            ((X3DNodeElementLight *)ne)->Color = color;
            ((X3DNodeElementLight *)ne)->Direction = direction;
            ((X3DNodeElementLight *)ne)->Global = global;
            ((X3DNodeElementLight *)ne)->Intensity = intensity;
            // Assimp want a node with name similar to a light. "Why? I don't no." )
            ParseHelper_Group_Begin(false);

            mNodeElementCur->ID = ne->ID; // assign name to node and return to light element.
            ParseHelper_Node_Exit();
            // check for child nodes
            if (!isNodeEmpty(node))
                childrenReadMetadata(node, ne, "DirectionalLight");
            else
                mNodeElementCur->Children.push_back(ne); // add made object as child to current element

            NodeElement_List.push_back(ne); // add element to node element list because its a new object in graph
        } // if(on)
    } // if(!use.empty()) else
}

// <PointLight
// DEF=""               ID
// USE=""               IDREF
// ambientIntensity="0" SFFloat [inputOutput]
// attenuation="1 0 0"  SFVec3f [inputOutput]
// color="1 1 1"        SFColor [inputOutput]
// global="true"        SFBool  [inputOutput]
// intensity="1"        SFFloat [inputOutput]
// location="0 0 0"     SFVec3f [inputOutput]
// on="true"            SFBool  [inputOutput]
// radius="100"         SFFloat [inputOutput]
// />
void X3DImporter::readPointLight(XmlNode &node) {
    std::string def, use;
    float ambientIntensity = 0;
    aiVector3D attenuation(1, 0, 0);
    aiColor3D color(1, 1, 1);
    bool global = true;
    float intensity = 1;
    aiVector3D location(0, 0, 0);
    bool on = true;
    float radius = 100;
    X3DNodeElementBase *ne(nullptr);

    MACRO_ATTRREAD_CHECKUSEDEF_RET(node, def, use);
    XmlParser::getFloatAttribute(node, "ambientIntensity", ambientIntensity);
    X3DXmlHelper::getVector3DAttribute(node, "attenuation", attenuation);
    X3DXmlHelper::getColor3DAttribute(node, "color", color);
    XmlParser::getBoolAttribute(node, "global", global);
    XmlParser::getFloatAttribute(node, "intensity", intensity);
    X3DXmlHelper::getVector3DAttribute(node, "location", location);
    XmlParser::getBoolAttribute(node, "on", on);
    XmlParser::getFloatAttribute(node, "radius", radius);

    // if "USE" defined then find already defined element.
    if (!use.empty()) {
        MACRO_USE_CHECKANDAPPLY(node, def, use, ENET_PointLight, ne);
    } else {
        if (on) {
            // create and if needed - define new geometry object.
            ne = new X3DNodeElementLight(X3DElemType::ENET_PointLight, mNodeElementCur);
            if (!def.empty()) ne->ID = def;

            ((X3DNodeElementLight *)ne)->AmbientIntensity = ambientIntensity;
            ((X3DNodeElementLight *)ne)->Attenuation = attenuation;
            ((X3DNodeElementLight *)ne)->Color = color;
            ((X3DNodeElementLight *)ne)->Global = global;
            ((X3DNodeElementLight *)ne)->Intensity = intensity;
            ((X3DNodeElementLight *)ne)->Location = location;
            ((X3DNodeElementLight *)ne)->Radius = radius;
            // Assimp want a node with name similar to a light. "Why? I don't no." )
            ParseHelper_Group_Begin(false);
            // make random name
            if (ne->ID.empty()) ne->ID = "PointLight_" + ai_to_string((size_t)ne);

            mNodeElementCur->ID = ne->ID; // assign name to node and return to light element.
            ParseHelper_Node_Exit();
            // check for child nodes
            if (!isNodeEmpty(node))
                childrenReadMetadata(node, ne, "PointLight");
            else
                mNodeElementCur->Children.push_back(ne); // add made object as child to current element

            NodeElement_List.push_back(ne); // add element to node element list because its a new object in graph
        } // if(on)
    } // if(!use.empty()) else
}

// <SpotLight
// DEF=""                 ID
// USE=""                 IDREF
// ambientIntensity="0"   SFFloat [inputOutput]
// attenuation="1 0 0"    SFVec3f [inputOutput]
// beamWidth="0.7854"     SFFloat [inputOutput]
// color="1 1 1"          SFColor [inputOutput]
// cutOffAngle="1.570796" SFFloat [inputOutput]
// direction="0 0 -1"     SFVec3f [inputOutput]
// global="true"          SFBool  [inputOutput]
// intensity="1"          SFFloat [inputOutput]
// location="0 0 0"       SFVec3f [inputOutput]
// on="true"              SFBool  [inputOutput]
// radius="100"           SFFloat [inputOutput]
// />
void X3DImporter::readSpotLight(XmlNode &node) {
    std::string def, use;
    float ambientIntensity = 0;
    aiVector3D attenuation(1, 0, 0);
    float beamWidth = 0.7854f;
    aiColor3D color(1, 1, 1);
    float cutOffAngle = 1.570796f;
    aiVector3D direction(0, 0, -1);
    bool global = true;
    float intensity = 1;
    aiVector3D location(0, 0, 0);
    bool on = true;
    float radius = 100;
    X3DNodeElementBase *ne(nullptr);

    MACRO_ATTRREAD_CHECKUSEDEF_RET(node, def, use);
    XmlParser::getFloatAttribute(node, "ambientIntensity", ambientIntensity);
    X3DXmlHelper::getVector3DAttribute(node, "attenuation", attenuation);
    XmlParser::getFloatAttribute(node, "beamWidth", beamWidth);
    X3DXmlHelper::getColor3DAttribute(node, "color", color);
    XmlParser::getFloatAttribute(node, "cutOffAngle", cutOffAngle);
    X3DXmlHelper::getVector3DAttribute(node, "direction", direction);
    XmlParser::getBoolAttribute(node, "global", global);
    XmlParser::getFloatAttribute(node, "intensity", intensity);
    X3DXmlHelper::getVector3DAttribute(node, "location", location);
    XmlParser::getBoolAttribute(node, "on", on);
    XmlParser::getFloatAttribute(node, "radius", radius);

    // if "USE" defined then find already defined element.
    if (!use.empty()) {
        MACRO_USE_CHECKANDAPPLY(node, def, use, ENET_SpotLight, ne);
    } else {
        if (on) {
            // create and if needed - define new geometry object.
            ne = new X3DNodeElementLight(X3DElemType::ENET_SpotLight, mNodeElementCur);
            if (!def.empty()) ne->ID = def;

            if (beamWidth > cutOffAngle) beamWidth = cutOffAngle;

            ((X3DNodeElementLight *)ne)->AmbientIntensity = ambientIntensity;
            ((X3DNodeElementLight *)ne)->Attenuation = attenuation;
            ((X3DNodeElementLight *)ne)->BeamWidth = beamWidth;
            ((X3DNodeElementLight *)ne)->Color = color;
            ((X3DNodeElementLight *)ne)->CutOffAngle = cutOffAngle;
            ((X3DNodeElementLight *)ne)->Direction = direction;
            ((X3DNodeElementLight *)ne)->Global = global;
            ((X3DNodeElementLight *)ne)->Intensity = intensity;
            ((X3DNodeElementLight *)ne)->Location = location;
            ((X3DNodeElementLight *)ne)->Radius = radius;

            // Assimp want a node with name similar to a light. "Why? I don't no." )
            ParseHelper_Group_Begin(false);
            // make random name
            if (ne->ID.empty()) ne->ID = "SpotLight_" + ai_to_string((size_t)ne);

            mNodeElementCur->ID = ne->ID; // assign name to node and return to light element.
            ParseHelper_Node_Exit();
            // check for child nodes
            if (!isNodeEmpty(node))
                childrenReadMetadata(node, ne, "SpotLight");
            else
                mNodeElementCur->Children.push_back(ne); // add made object as child to current element

            NodeElement_List.push_back(ne); // add element to node element list because its a new object in graph
        } // if(on)
    } // if(!use.empty()) else
}

} // namespace Assimp

#endif // !ASSIMP_BUILD_NO_X3D_IMPORTER