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/// \file AMFImporter_Material.cpp

/// \brief Parsing data from material nodes.

/// \date 2016

/// \author smal.root@gmail.com

#ifndef ASSIMP_BUILD_NO_AMF_IMPORTER

#include "AMFImporter.hpp"

namespace Assimp {

// <color

// profile="" - The ICC color space used to interpret the three color channels <r>, <g> and <b>.

// >

// </color>

// A color definition.

// Multi elements - No.

// Parent element - <material>, <object>, <volume>, <vertex>, <triangle>.

//

// "profile" can be one of "sRGB", "AdobeRGB", "Wide-Gamut-RGB", "CIERGB", "CIELAB", or "CIEXYZ".

// Children elements:

//   <r>, <g>, <b>, <a>

//   Multi elements - No.

//   Red, Greed, Blue and Alpha (transparency) component of a color in sRGB space, values ranging from 0 to 1. The

//   values can be specified as constants, or as a formula depending on the coordinates.

void AMFImporter::ParseNode_Color(XmlNode &node) {

    if (node.empty()) {

        return;

    }

    const std::string &profile = node.attribute("profile").as_string();

    bool read_flag[4] = { false, false, false, false };

    AMFNodeElementBase *ne = new AMFColor(mNodeElement_Cur);

    AMFColor &als = *((AMFColor *)ne); // alias for convenience

    ParseHelper_Node_Enter(ne);

    for (pugi::xml_node &child : node.children()) {

        // create new color object.

        als.Profile = profile;

        const std::string &name = child.name();

        if ( name == "r") {

      read_flag[0] = true;

            XmlParser::getValueAsFloat(child, als.Color.r);

        } else if (name == "g") {

      read_flag[1] = true;

            XmlParser::getValueAsFloat(child, als.Color.g);

        } else if (name == "b") {

      read_flag[2] = true;

            XmlParser::getValueAsFloat(child, als.Color.b);

        } else if (name == "a") {

      read_flag[3] = true;

            XmlParser::getValueAsFloat(child, als.Color.a);

        }

        // check if <a> is absent. Then manually add "a == 1".

        if (!read_flag[3]) {

            als.Color.a = 1;

        }

    }

    als.Composed = false;

    mNodeElement_List.push_back(ne); // and to node element list because its a new object in graph.

    ParseHelper_Node_Exit();

    // check that all components was defined

  if (!(read_flag[0] && read_flag[1] && read_flag[2])) {

    throw DeadlyImportError("Not all color components are defined.");

  }

}

// <material

// id="" - A unique material id. material ID "0" is reserved to denote no material (void) or sacrificial material.

// >

// </material>

// An available material.

// Multi elements - Yes.

// Parent element - <amf>.

void AMFImporter::ParseNode_Material(XmlNode &node) {

    // create new object and assign read data

  std::string id = node.attribute("id").as_string();

  AMFNodeElementBase *ne = new AMFMaterial(mNodeElement_Cur);

  ((AMFMaterial*)ne)->ID = id;

    // Check for child nodes

  if (!node.empty()) {

        ParseHelper_Node_Enter(ne);

        for (pugi::xml_node &child : node.children()) {

            const std::string name = child.name();

            if (name == "color") {

        ParseNode_Color(child);

            } else if (name == "metadata") {

        ParseNode_Metadata(child);

      }

    }

        ParseHelper_Node_Exit();

  } else {

    mNodeElement_Cur->Child.push_back(ne);// Add element to child list of current element

  }

  mNodeElement_List.push_back(ne);// and to node element list because its a new object in graph.

}

// <texture

// id=""     - Assigns a unique texture id for the new texture.

// width=""  - Width (horizontal size, x) of the texture, in pixels.

// height="" - Height (lateral size, y) of the texture, in pixels.

// depth=""  - Depth (vertical size, z) of the texture, in pixels.

// type=""   - Encoding of the data in the texture. Currently allowed values are "grayscale" only. In grayscale mode, each pixel is represented by one byte

//   in the range of 0-255. When the texture is referenced using the tex function, these values are converted into a single floating point number in the

//   range of 0-1 (see Annex 2). A full color graphics will typically require three textures, one for each of the color channels. A graphic involving

//   transparency may require a fourth channel.

// tiled=""  - If true then texture repeated when UV-coordinates is greater than 1.

// >

// </triangle>

// Specifies an texture data to be used as a map. Lists a sequence of Base64 values specifying values for pixels from left to right then top to bottom,

// then layer by layer.

// Multi elements - Yes.

// Parent element - <amf>.

void AMFImporter::ParseNode_Texture(XmlNode &node) {

    const std::string id = node.attribute("id").as_string();

  const uint32_t width = node.attribute("width").as_uint();

    const uint32_t height = node.attribute("height").as_uint();

    uint32_t depth = node.attribute("depth").as_uint();

    const std::string type = node.attribute("type").as_string();

  bool tiled = node.attribute("tiled").as_bool();

    if (node.empty()) {

    return;

    }

    // create new texture object.

    AMFNodeElementBase *ne = new AMFTexture(mNodeElement_Cur);

  AMFTexture& als = *((AMFTexture*)ne);// alias for convenience

    std::string enc64_data;

    XmlParser::getValueAsString(node, enc64_data);

    // Check for child nodes

  // check that all components was defined

    if (id.empty()) {

    throw DeadlyImportError("ID for texture must be defined.");

    }

    if (width < 1) {

    throw DeadlyImportError("Invalid width for texture.");

    }

    if (height < 1) {

    throw DeadlyImportError("Invalid height for texture.");

  }

    if (type != "grayscale") {

    throw DeadlyImportError("Invalid type for texture.");

    }

    if (enc64_data.empty()) {

        throw DeadlyImportError("Texture data not defined.");

    }

  // copy data

  als.ID = id;

  als.Width = width;

  als.Height = height;

  als.Depth = depth;

  als.Tiled = tiled;

  ParseHelper_Decode_Base64(enc64_data, als.Data);

    if (depth == 0) {

        depth = (uint32_t)(als.Data.size() / (width * height));

    }

    // check data size

    if ((width * height * depth) != als.Data.size()) {

        throw DeadlyImportError("Texture has incorrect data size.");

    }

  mNodeElement_Cur->Child.push_back(ne);// Add element to child list of current element

  mNodeElement_List.push_back(ne);// and to node element list because its a new object in graph.

}

// <texmap

// rtexid="" - Texture ID for red color component.

// gtexid="" - Texture ID for green color component.

// btexid="" - Texture ID for blue color component.

// atexid="" - Texture ID for alpha color component. Optional.

// >

// </texmap>, old name: <map>

// Specifies texture coordinates for triangle.

// Multi elements - No.

// Parent element - <triangle>.

// Children elements:

//   <utex1>, <utex2>, <utex3>, <vtex1>, <vtex2>, <vtex3>. Old name: <u1>, <u2>, <u3>, <v1>, <v2>, <v3>.

//   Multi elements - No.

//   Texture coordinates for every vertex of triangle.

void AMFImporter::ParseNode_TexMap(XmlNode &node, const bool pUseOldName) {

  // Read attributes for node <color>.

    AMFNodeElementBase *ne = new AMFTexMap(mNodeElement_Cur);

    AMFTexMap &als = *((AMFTexMap *)ne); //

    std::string rtexid, gtexid, btexid, atexid;

    if (!node.empty()) {

        for (pugi::xml_attribute &attr : node.attributes()) {

            const std::string &currentAttr = attr.name();

            if (currentAttr == "rtexid") {

                rtexid = attr.as_string();

            } else if (currentAttr == "gtexid") {

                gtexid = attr.as_string();

            } else if (currentAttr == "btexid") {

                btexid = attr.as_string();

            } else if (currentAttr == "atexid") {

                atexid = attr.as_string();

            }

        }

    }

  // create new texture coordinates object, alias for convenience

  // check data

  if (rtexid.empty() && gtexid.empty() && btexid.empty()) {

    throw DeadlyImportError("ParseNode_TexMap. At least one texture ID must be defined.");

  }

  // Check for children nodes

  if (node.children().begin() == node.children().end()) {

    throw DeadlyImportError("Invalid children definition.");

  }

  // read children nodes

  bool read_flag[6] = { false, false, false, false, false, false };

  if (!pUseOldName) {

        ParseHelper_Node_Enter(ne);

        for ( XmlNode &currentNode : node.children()) {

            const std::string &name = currentNode.name();

            if (name == "utex1") {

        read_flag[0] = true;

                XmlParser::getValueAsReal(currentNode, als.TextureCoordinate[0].x);

            } else if (name == "utex2") {

        read_flag[1] = true;

                XmlParser::getValueAsReal(currentNode, als.TextureCoordinate[1].x);

            } else if (name == "utex3") {

        read_flag[2] = true;

                XmlParser::getValueAsReal(currentNode, als.TextureCoordinate[2].x);

            } else if (name == "vtex1") {

        read_flag[3] = true;

                XmlParser::getValueAsReal(currentNode, als.TextureCoordinate[0].y);

            } else if (name == "vtex2") {

        read_flag[4] = true;

                XmlParser::getValueAsReal(currentNode, als.TextureCoordinate[1].y);

            } else if (name == "vtex3") {

        read_flag[5] = true;

                XmlParser::getValueAsReal(currentNode, als.TextureCoordinate[2].y);

      }

    }

        ParseHelper_Node_Exit();

  } else {

    for (pugi::xml_attribute &attr : node.attributes()) {

            const std::string name = attr.name();

            if (name == "u") {

        read_flag[0] = true;

        als.TextureCoordinate[0].x = attr.as_float();

            } else if (name == "u2") {

        read_flag[1] = true;

        als.TextureCoordinate[1].x = attr.as_float();

            } else if (name == "u3") {

        read_flag[2] = true;

        als.TextureCoordinate[2].x = attr.as_float();

            } else if (name == "v1") {

        read_flag[3] = true;

        als.TextureCoordinate[0].y = attr.as_float();

            } else if (name == "v2") {

        read_flag[4] = true;

        als.TextureCoordinate[1].y = attr.as_float();

            } else if (name == "v3") {

        read_flag[5] = true;

        als.TextureCoordinate[0].y = attr.as_float();

      }

    }

  }

  // check that all components was defined

  if (!(read_flag[0] && read_flag[1] && read_flag[2] && read_flag[3] && read_flag[4] && read_flag[5])) {

    throw DeadlyImportError("Not all texture coordinates are defined.");

  }

  // copy attributes data

  als.TextureID_R = rtexid;

  als.TextureID_G = gtexid;

  als.TextureID_B = btexid;

  als.TextureID_A = atexid;

  mNodeElement_List.push_back(ne);

}

}// namespace Assimp

#endif // !ASSIMP_BUILD_NO_AMF_IMPORTER