#ifndef WC3RE_OBJDECODER_HH__
#define WC3RE_OBJDECODER_HH__

#include <string>
#include <cstdint>
#include <vector>
#include <array>

#include "IffFile.hh"

class Resource;

class ObjDecoder {
public:
  ObjDecoder(Resource const& res);

  using Vertex = std::array<int32_t, 3>;
  using Vertices = std::vector<Vertex>;
  using TexCoord = std::array<uint16_t, 2>;
  
  struct Triangle {
    uint16_t id;
    uint16_t tex;
    std::array<uint16_t, 3> vertIdx;
    std::array<TexCoord, 3> texCoords;
  };
  using Triangles = std::vector<Triangle>;
  
  struct Quad {
    uint16_t id;
    uint16_t tex;
    std::array<uint16_t, 4> vertIdx;
    std::array<TexCoord, 4> texCoords;
  };
  using Quads = std::vector<Quad>;

  struct Texture {
    std::string name;
    uint16_t width, height;
    std::vector<uint8_t> pixels;
  };
  using Textures = std::vector<Texture>;

  struct TextureAnimation {
    std::string name;
    uint16_t width, height, frames;
    std::vector<std::vector<uint8_t> > pixels;
  };
  using TextureAnimations = std::vector<TextureAnimation>;
  
  Vertices const& getVertices() const {
    return vertices_;
  }
  
  Triangles getTriangles(unsigned lvl = 0) const;
  Quads getQuads(unsigned lvl = 0) const;

  unsigned getDetailLevels() const {
    return detailLevels_.size();
  }

  using DetailLevel = std::vector<uint16_t>;
  using DetailLevels = std::vector<DetailLevel>;
  
  Textures const& getTextures() const {
    return textures_;
  }

  TextureAnimations const& getTextureAnimations() const {
    return texAnims_;
  }
private:
  IffFile iff_;
  std::string name_;

  void parseOBJT_(IffFile::Form const& form);
  void parseAPPR_(IffFile::Form const& form);
  void parsePOLY_(IffFile::Form const& form);
  void parseTRIS_(IffFile::Form const& form);
  void parseQUAD_(IffFile::Form const& form);
  void parseDETA_(IffFile::Form const& form);
  void parseTXMS_(IffFile::Form const& form);

  Vertices vertices_;
  Triangles triangles_;
  Quads quads_;
  Textures textures_;
  TextureAnimations texAnims_;
  DetailLevels detailLevels_;
};

#endif