#define TINYOBJLOADER_IMPLEMENTATION
#include "../tiny_obj_loader.h"

#define CATCH_CONFIG_MAIN  // This tells Catch to provide a main() - only do
                           // this in one cpp file
#include "catch.hpp"

#include <cassert>
#include <cstdio>
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <sstream>

static void PrintInfo(const tinyobj::attrib_t& attrib,
                      const std::vector<tinyobj::shape_t>& shapes,
                      const std::vector<tinyobj::material_t>& materials,
                      bool triangulate = true) {
  std::cout << "# of vertices  : " << (attrib.vertices.size() / 3) << std::endl;
  std::cout << "# of normals   : " << (attrib.normals.size() / 3) << std::endl;
  std::cout << "# of texcoords : " << (attrib.texcoords.size() / 2)
            << std::endl;

  std::cout << "# of shapes    : " << shapes.size() << std::endl;
  std::cout << "# of materials : " << materials.size() << std::endl;

  for (size_t v = 0; v < attrib.vertices.size() / 3; v++) {
    printf("  v[%ld] = (%f, %f, %f)\n", v,
           static_cast<const double>(attrib.vertices[3 * v + 0]),
           static_cast<const double>(attrib.vertices[3 * v + 1]),
           static_cast<const double>(attrib.vertices[3 * v + 2]));
  }

  for (size_t v = 0; v < attrib.normals.size() / 3; v++) {
    printf("  n[%ld] = (%f, %f, %f)\n", v,
           static_cast<const double>(attrib.normals[3 * v + 0]),
           static_cast<const double>(attrib.normals[3 * v + 1]),
           static_cast<const double>(attrib.normals[3 * v + 2]));
  }

  for (size_t v = 0; v < attrib.texcoords.size() / 2; v++) {
    printf("  uv[%ld] = (%f, %f)\n", v,
           static_cast<const double>(attrib.texcoords[2 * v + 0]),
           static_cast<const double>(attrib.texcoords[2 * v + 1]));
  }

  for (size_t i = 0; i < shapes.size(); i++) {
    printf("shape[%ld].name = %s\n", i, shapes[i].name.c_str());
    printf("Size of shape[%ld].indices: %ld\n", i,
           shapes[i].mesh.indices.size());

    if (triangulate) {
      printf("Size of shape[%ld].material_ids: %ld\n", i,
             shapes[i].mesh.material_ids.size());
      assert((shapes[i].mesh.indices.size() % 3) == 0);
      for (size_t f = 0; f < shapes[i].mesh.indices.size() / 3; f++) {
        tinyobj::index_t i0 = shapes[i].mesh.indices[3 * f + 0];
        tinyobj::index_t i1 = shapes[i].mesh.indices[3 * f + 1];
        tinyobj::index_t i2 = shapes[i].mesh.indices[3 * f + 2];
        printf("  idx[%ld] = %d/%d/%d, %d/%d/%d, %d/%d/%d. mat_id = %d\n", f,
               i0.vertex_index, i0.normal_index, i0.texcoord_index,
               i1.vertex_index, i1.normal_index, i1.texcoord_index,
               i2.vertex_index, i2.normal_index, i2.texcoord_index,
               shapes[i].mesh.material_ids[f]);
      }
    } else {
      for (size_t f = 0; f < shapes[i].mesh.indices.size(); f++) {
        tinyobj::index_t idx = shapes[i].mesh.indices[f];
        printf("  idx[%ld] = %d/%d/%d\n", f, idx.vertex_index, idx.normal_index,
               idx.texcoord_index);
      }

      printf("Size of shape[%ld].material_ids: %ld\n", i,
             shapes[i].mesh.material_ids.size());
      assert(shapes[i].mesh.material_ids.size() ==
             shapes[i].mesh.num_face_vertices.size());
      for (size_t m = 0; m < shapes[i].mesh.material_ids.size(); m++) {
        printf("  material_id[%ld] = %d\n", m, shapes[i].mesh.material_ids[m]);
      }
    }

    printf("shape[%ld].num_faces: %ld\n", i,
           shapes[i].mesh.num_face_vertices.size());
    for (size_t v = 0; v < shapes[i].mesh.num_face_vertices.size(); v++) {
      printf("  num_vertices[%ld] = %ld\n", v,
             static_cast<long>(shapes[i].mesh.num_face_vertices[v]));
    }

    // printf("shape[%ld].vertices: %ld\n", i, shapes[i].mesh.positions.size());
    // assert((shapes[i].mesh.positions.size() % 3) == 0);
    // for (size_t v = 0; v < shapes[i].mesh.positions.size() / 3; v++) {
    //  printf("  v[%ld] = (%f, %f, %f)\n", v,
    //    static_cast<const double>(shapes[i].mesh.positions[3*v+0]),
    //    static_cast<const double>(shapes[i].mesh.positions[3*v+1]),
    //    static_cast<const double>(shapes[i].mesh.positions[3*v+2]));
    //}

    printf("shape[%ld].num_tags: %ld\n", i, shapes[i].mesh.tags.size());
    for (size_t t = 0; t < shapes[i].mesh.tags.size(); t++) {
      printf("  tag[%ld] = %s ", t, shapes[i].mesh.tags[t].name.c_str());
      printf(" ints: [");
      for (size_t j = 0; j < shapes[i].mesh.tags[t].intValues.size(); ++j) {
        printf("%ld", static_cast<long>(shapes[i].mesh.tags[t].intValues[j]));
        if (j < (shapes[i].mesh.tags[t].intValues.size() - 1)) {
          printf(", ");
        }
      }
      printf("]");

      printf(" floats: [");
      for (size_t j = 0; j < shapes[i].mesh.tags[t].floatValues.size(); ++j) {
        printf("%f", static_cast<const double>(
                         shapes[i].mesh.tags[t].floatValues[j]));
        if (j < (shapes[i].mesh.tags[t].floatValues.size() - 1)) {
          printf(", ");
        }
      }
      printf("]");

      printf(" strings: [");
      for (size_t j = 0; j < shapes[i].mesh.tags[t].stringValues.size(); ++j) {
        printf("%s", shapes[i].mesh.tags[t].stringValues[j].c_str());
        if (j < (shapes[i].mesh.tags[t].stringValues.size() - 1)) {
          printf(", ");
        }
      }
      printf("]");
      printf("\n");
    }
  }

  for (size_t i = 0; i < materials.size(); i++) {
    printf("material[%ld].name = %s\n", i, materials[i].name.c_str());
    printf("  material.Ka = (%f, %f ,%f)\n",
           static_cast<const double>(materials[i].ambient[0]),
           static_cast<const double>(materials[i].ambient[1]),
           static_cast<const double>(materials[i].ambient[2]));
    printf("  material.Kd = (%f, %f ,%f)\n",
           static_cast<const double>(materials[i].diffuse[0]),
           static_cast<const double>(materials[i].diffuse[1]),
           static_cast<const double>(materials[i].diffuse[2]));
    printf("  material.Ks = (%f, %f ,%f)\n",
           static_cast<const double>(materials[i].specular[0]),
           static_cast<const double>(materials[i].specular[1]),
           static_cast<const double>(materials[i].specular[2]));
    printf("  material.Tr = (%f, %f ,%f)\n",
           static_cast<const double>(materials[i].transmittance[0]),
           static_cast<const double>(materials[i].transmittance[1]),
           static_cast<const double>(materials[i].transmittance[2]));
    printf("  material.Ke = (%f, %f ,%f)\n",
           static_cast<const double>(materials[i].emission[0]),
           static_cast<const double>(materials[i].emission[1]),
           static_cast<const double>(materials[i].emission[2]));
    printf("  material.Ns = %f\n",
           static_cast<const double>(materials[i].shininess));
    printf("  material.Ni = %f\n", static_cast<const double>(materials[i].ior));
    printf("  material.dissolve = %f\n",
           static_cast<const double>(materials[i].dissolve));
    printf("  material.illum = %d\n", materials[i].illum);
    printf("  material.map_Ka = %s\n", materials[i].ambient_texname.c_str());
    printf("  material.map_Kd = %s\n", materials[i].diffuse_texname.c_str());
    printf("  material.map_Ks = %s\n", materials[i].specular_texname.c_str());
    printf("  material.map_Ns = %s\n",
           materials[i].specular_highlight_texname.c_str());
    printf("  material.map_bump = %s\n", materials[i].bump_texname.c_str());
    printf("  material.map_d = %s\n", materials[i].alpha_texname.c_str());
    printf("  material.disp = %s\n", materials[i].displacement_texname.c_str());
    printf("  material.refl = %s\n", materials[i].reflection_texname.c_str());
    std::map<std::string, std::string>::const_iterator it(
        materials[i].unknown_parameter.begin());
    std::map<std::string, std::string>::const_iterator itEnd(
        materials[i].unknown_parameter.end());

    for (; it != itEnd; it++) {
      printf("  material.%s = %s\n", it->first.c_str(), it->second.c_str());
    }
    printf("\n");
  }
}

static bool TestLoadObj(const char* filename, const char* basepath = NULL,
                        bool triangulate = true) {
  std::cout << "Loading " << filename << std::endl;

  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              filename, basepath, triangulate);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }

  if (!ret) {
    printf("Failed to load/parse .obj.\n");
    return false;
  }

  PrintInfo(attrib, shapes, materials, triangulate);

  return true;
}

static bool TestLoadObjFromPreopenedFile(const char* filename,
                                         const char* basepath = NULL,
                                         bool readMaterials = true,
                                         bool triangulate = true) {
  std::string fullFilename = std::string(basepath) + filename;
  std::cout << "Loading " << fullFilename << std::endl;

  std::ifstream fileStream(fullFilename.c_str());

  if (!fileStream) {
    std::cerr << "Could not find specified file: " << fullFilename << std::endl;
    return false;
  }

  tinyobj::MaterialStreamReader materialStreamReader(fileStream);
  tinyobj::MaterialStreamReader* materialReader =
      readMaterials ? &materialStreamReader : NULL;

  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              &fileStream, materialReader);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }

  if (!ret) {
    printf("Failed to load/parse .obj.\n");
    return false;
  }

  std::cout << "Loaded material count: " << materials.size() << "\n";

  return true;
}

static bool TestStreamLoadObj() {
  std::cout << "Stream Loading " << std::endl;

  std::stringstream objStream;
  objStream << "mtllib cube.mtl\n"
               "\n"
               "v 0.000000 2.000000 2.000000\n"
               "v 0.000000 0.000000 2.000000\n"
               "v 2.000000 0.000000 2.000000\n"
               "v 2.000000 2.000000 2.000000\n"
               "v 0.000000 2.000000 0.000000\n"
               "v 0.000000 0.000000 0.000000\n"
               "v 2.000000 0.000000 0.000000\n"
               "v 2.000000 2.000000 0.000000\n"
               "# 8 vertices\n"
               "\n"
               "g front cube\n"
               "usemtl white\n"
               "f 1 2 3 4\n"
               "g back cube\n"
               "# expects white material\n"
               "f 8 7 6 5\n"
               "g right cube\n"
               "usemtl red\n"
               "f 4 3 7 8\n"
               "g top cube\n"
               "usemtl white\n"
               "f 5 1 4 8\n"
               "g left cube\n"
               "usemtl green\n"
               "f 5 6 2 1\n"
               "g bottom cube\n"
               "usemtl white\n"
               "f 2 6 7 3\n"
               "# 6 elements";

  std::string matStream(
      "newmtl white\n"
      "Ka 0 0 0\n"
      "Kd 1 1 1\n"
      "Ks 0 0 0\n"
      "\n"
      "newmtl red\n"
      "Ka 0 0 0\n"
      "Kd 1 0 0\n"
      "Ks 0 0 0\n"
      "\n"
      "newmtl green\n"
      "Ka 0 0 0\n"
      "Kd 0 1 0\n"
      "Ks 0 0 0\n"
      "\n"
      "newmtl blue\n"
      "Ka 0 0 0\n"
      "Kd 0 0 1\n"
      "Ks 0 0 0\n"
      "\n"
      "newmtl light\n"
      "Ka 20 20 20\n"
      "Kd 1 1 1\n"
      "Ks 0 0 0");

  using namespace tinyobj;
  class MaterialStringStreamReader : public MaterialReader {
   public:
    MaterialStringStreamReader(const std::string& matSStream)
        : m_matSStream(matSStream) {}
    virtual ~MaterialStringStreamReader() {}
    virtual bool operator()(const std::string& matId,
                            std::vector<material_t>* materials,
                            std::map<std::string, int>* matMap,
                            std::string* warn, std::string* err) {
      (void)matId;
      (void)warn;
      (void)err;
      std::string warning;
      std::string error_msg;
      LoadMtl(matMap, materials, &m_matSStream, &warning, &error_msg);
      return true;
    }

   private:
    std::stringstream m_matSStream;
  };

  MaterialStringStreamReader matSSReader(matStream);
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;
  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              &objStream, &matSSReader);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }

  if (!ret) {
    return false;
  }

  PrintInfo(attrib, shapes, materials);

  return true;
}

const char* gMtlBasePath = "../models/";

TEST_CASE("cornell_box", "[Loader]") {
  REQUIRE(true == TestLoadObj("../models/cornell_box.obj", gMtlBasePath));
}

TEST_CASE("catmark_torus_creases0", "[Loader]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/catmark_torus_creases0.obj",
                              gMtlBasePath, /*triangulate*/ false);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }

  REQUIRE(true == ret);

  REQUIRE(1 == shapes.size());
  REQUIRE(8 == shapes[0].mesh.tags.size());
}

TEST_CASE("pbr", "[Loader]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/pbr-mat-ext.obj", gMtlBasePath,
                              /*triangulate*/ false);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }
  REQUIRE(true == ret);
  REQUIRE(1 == materials.size());
  REQUIRE(0.2 == Approx(materials[0].roughness));
  REQUIRE(0.3 == Approx(materials[0].metallic));
  REQUIRE(0.4 == Approx(materials[0].sheen));
  REQUIRE(0.5 == Approx(materials[0].clearcoat_thickness));
  REQUIRE(0.6 == Approx(materials[0].clearcoat_roughness));
  REQUIRE(0.7 == Approx(materials[0].anisotropy));
  REQUIRE(0.8 == Approx(materials[0].anisotropy_rotation));
  REQUIRE(0 == materials[0].roughness_texname.compare("roughness.tex"));
  REQUIRE(0 == materials[0].metallic_texname.compare("metallic.tex"));
  REQUIRE(0 == materials[0].sheen_texname.compare("sheen.tex"));
  REQUIRE(0 == materials[0].emissive_texname.compare("emissive.tex"));
  REQUIRE(0 == materials[0].normal_texname.compare("normalmap.tex"));
}

TEST_CASE("stream_load", "[Stream]") { REQUIRE(true == TestStreamLoadObj()); }

TEST_CASE("stream_load_from_file_skipping_materials", "[Stream]") {
  REQUIRE(true == TestLoadObjFromPreopenedFile(
                      "../models/pbr-mat-ext.obj", gMtlBasePath,
                      /*readMaterials*/ false, /*triangulate*/ false));
}

TEST_CASE("stream_load_from_file_with_materials", "[Stream]") {
  REQUIRE(true == TestLoadObjFromPreopenedFile(
                      "../models/pbr-mat-ext.obj", gMtlBasePath,
                      /*readMaterials*/ true, /*triangulate*/ false));
}

TEST_CASE("trailing_whitespace_in_mtl", "[Issue92]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/issue-92.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }
  REQUIRE(true == ret);
  REQUIRE(1 == materials.size());
  REQUIRE(0 == materials[0].diffuse_texname.compare("tmp.png"));
}

TEST_CASE("transmittance_filter", "[Issue95]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/issue-95.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }
  REQUIRE(true == ret);
  REQUIRE(1 == materials.size());
  REQUIRE(0.1 == Approx(materials[0].transmittance[0]));
  REQUIRE(0.2 == Approx(materials[0].transmittance[1]));
  REQUIRE(0.3 == Approx(materials[0].transmittance[2]));
}

TEST_CASE("transmittance_filter_Tf", "[Issue95-Tf]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/issue-95-2.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }
  REQUIRE(true == ret);
  REQUIRE(1 == materials.size());
  REQUIRE(0.1 == Approx(materials[0].transmittance[0]));
  REQUIRE(0.2 == Approx(materials[0].transmittance[1]));
  REQUIRE(0.3 == Approx(materials[0].transmittance[2]));
}

TEST_CASE("transmittance_filter_Kt", "[Issue95-Kt]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/issue-95.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }
  REQUIRE(true == ret);
  REQUIRE(1 == materials.size());
  REQUIRE(0.1 == Approx(materials[0].transmittance[0]));
  REQUIRE(0.2 == Approx(materials[0].transmittance[1]));
  REQUIRE(0.3 == Approx(materials[0].transmittance[2]));
}

TEST_CASE("usemtl_at_last_line", "[Issue104]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/usemtl-issue-104.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }
  REQUIRE(true == ret);
  REQUIRE(1 == shapes.size());
}

TEST_CASE("texture_opts", "[Issue85]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret =
      tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                       "../models/texture-options-issue-85.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }
  REQUIRE(true == ret);
  REQUIRE(1 == shapes.size());
  REQUIRE(3 == materials.size());
  REQUIRE(0 == materials[0].name.compare("default"));
  REQUIRE(0 == materials[1].name.compare("bm2"));
  REQUIRE(0 == materials[2].name.compare("bm3"));
  REQUIRE(true == materials[0].ambient_texopt.clamp);
  REQUIRE(0.1 == Approx(materials[0].diffuse_texopt.origin_offset[0]));
  REQUIRE(0.0 == Approx(materials[0].diffuse_texopt.origin_offset[1]));
  REQUIRE(0.0 == Approx(materials[0].diffuse_texopt.origin_offset[2]));
  REQUIRE(0.1 == Approx(materials[0].specular_texopt.scale[0]));
  REQUIRE(0.2 == Approx(materials[0].specular_texopt.scale[1]));
  REQUIRE(1.0 == Approx(materials[0].specular_texopt.scale[2]));
  REQUIRE(0.1 == Approx(materials[0].specular_highlight_texopt.turbulence[0]));
  REQUIRE(0.2 == Approx(materials[0].specular_highlight_texopt.turbulence[1]));
  REQUIRE(0.3 == Approx(materials[0].specular_highlight_texopt.turbulence[2]));
  REQUIRE(3.0 == Approx(materials[0].bump_texopt.bump_multiplier));

  REQUIRE(0.1 == Approx(materials[1].specular_highlight_texopt.brightness));
  REQUIRE(0.3 == Approx(materials[1].specular_highlight_texopt.contrast));
  REQUIRE('r' == materials[1].bump_texopt.imfchan);

  REQUIRE(tinyobj::TEXTURE_TYPE_SPHERE == materials[2].diffuse_texopt.type);
  REQUIRE(tinyobj::TEXTURE_TYPE_CUBE_TOP == materials[2].specular_texopt.type);
  REQUIRE(tinyobj::TEXTURE_TYPE_CUBE_BOTTOM ==
          materials[2].specular_highlight_texopt.type);
  REQUIRE(tinyobj::TEXTURE_TYPE_CUBE_LEFT == materials[2].ambient_texopt.type);
  REQUIRE(tinyobj::TEXTURE_TYPE_CUBE_RIGHT == materials[2].alpha_texopt.type);
  REQUIRE(tinyobj::TEXTURE_TYPE_CUBE_FRONT == materials[2].bump_texopt.type);
  REQUIRE(tinyobj::TEXTURE_TYPE_CUBE_BACK ==
          materials[2].displacement_texopt.type);
}

TEST_CASE("mtllib_multiple_filenames", "[Issue112]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/mtllib-multiple-files-issue-112.obj",
                              gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }
  REQUIRE(true == ret);
  REQUIRE(1 == materials.size());
}

TEST_CASE("tr_and_d", "[Issue43]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/tr-and-d-issue-43.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }
  REQUIRE(true == ret);
  REQUIRE(2 == materials.size());

  REQUIRE(0.75 == Approx(materials[0].dissolve));
  REQUIRE(0.75 == Approx(materials[1].dissolve));
}

TEST_CASE("refl", "[refl]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/refl.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }

  PrintInfo(attrib, shapes, materials);

  REQUIRE(true == ret);
  REQUIRE(5 == materials.size());

  REQUIRE(materials[0].reflection_texname.compare("reflection.tga") == 0);
}

TEST_CASE("map_Bump", "[bump]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/map-bump.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }

  PrintInfo(attrib, shapes, materials);

  REQUIRE(true == ret);
  REQUIRE(2 == materials.size());

  REQUIRE(materials[0].bump_texname.compare("bump.jpg") == 0);
}

TEST_CASE("g_ignored", "[Issue138]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/issue-138.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }

  PrintInfo(attrib, shapes, materials);

  REQUIRE(true == ret);
  REQUIRE(2 == shapes.size());
  REQUIRE(2 == materials.size());
}

TEST_CASE("vertex-col-ext", "[Issue144]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;

  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/cube-vertexcol.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }

  // PrintInfo(attrib, shapes, materials);

  REQUIRE(true == ret);
  REQUIRE((8 * 3) == attrib.colors.size());

  REQUIRE(0 == Approx(attrib.colors[3 * 0 + 0]));
  REQUIRE(0 == Approx(attrib.colors[3 * 0 + 1]));
  REQUIRE(0 == Approx(attrib.colors[3 * 0 + 2]));

  REQUIRE(0 == Approx(attrib.colors[3 * 1 + 0]));
  REQUIRE(0 == Approx(attrib.colors[3 * 1 + 1]));
  REQUIRE(1 == Approx(attrib.colors[3 * 1 + 2]));

  REQUIRE(1 == Approx(attrib.colors[3 * 4 + 0]));

  REQUIRE(1 == Approx(attrib.colors[3 * 7 + 0]));
  REQUIRE(1 == Approx(attrib.colors[3 * 7 + 1]));
  REQUIRE(1 == Approx(attrib.colors[3 * 7 + 2]));
}

TEST_CASE("norm_texopts", "[norm]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/norm-texopt.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }

  REQUIRE(true == ret);
  REQUIRE(1 == shapes.size());
  REQUIRE(1 == materials.size());
  REQUIRE(3.0 == Approx(materials[0].normal_texopt.bump_multiplier));
}

TEST_CASE("zero-face-idx-value", "[Issue140]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret =
      tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                       "../models/issue-140-zero-face-idx.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }
  REQUIRE(false == ret);
  REQUIRE(!err.empty());
}

TEST_CASE("texture-name-whitespace", "[Issue145]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/texture-filename-with-whitespace.obj",
                              gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }

  REQUIRE(true == ret);
  REQUIRE(err.empty());
  REQUIRE(2 < materials.size());

  REQUIRE(0 == materials[0].diffuse_texname.compare("texture 01.png"));
  REQUIRE(0 == materials[1].bump_texname.compare("bump 01.png"));
  REQUIRE(2 == Approx(materials[1].bump_texopt.bump_multiplier));
}

TEST_CASE("smoothing-group", "[Issue162]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret =
      tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                       "../models/issue-162-smoothing-group.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }

  REQUIRE(true == ret);
  REQUIRE(2 == shapes.size());

  REQUIRE(2 == shapes[0].mesh.smoothing_group_ids.size());
  REQUIRE(1 == shapes[0].mesh.smoothing_group_ids[0]);
  REQUIRE(1 == shapes[0].mesh.smoothing_group_ids[1]);

  REQUIRE(10 == shapes[1].mesh.smoothing_group_ids.size());
  REQUIRE(0 == shapes[1].mesh.smoothing_group_ids[0]);
  REQUIRE(0 == shapes[1].mesh.smoothing_group_ids[1]);
  REQUIRE(3 == shapes[1].mesh.smoothing_group_ids[2]);
  REQUIRE(3 == shapes[1].mesh.smoothing_group_ids[3]);
  REQUIRE(4 == shapes[1].mesh.smoothing_group_ids[4]);
  REQUIRE(4 == shapes[1].mesh.smoothing_group_ids[5]);
  REQUIRE(0 == shapes[1].mesh.smoothing_group_ids[6]);
  REQUIRE(0 == shapes[1].mesh.smoothing_group_ids[7]);
  REQUIRE(6 == shapes[1].mesh.smoothing_group_ids[8]);
  REQUIRE(6 == shapes[1].mesh.smoothing_group_ids[9]);
}

TEST_CASE("invalid-face-definition", "[face]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret =
      tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                       "../models/invalid-face-definition.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }

  REQUIRE(true == ret);
  REQUIRE(1 == shapes.size());
  REQUIRE(0 == shapes[0].mesh.indices.size());
}

TEST_CASE("Empty mtl basedir", "[Issue177]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;

  // A case where the user explicitly provides an empty string
  // Win32 specific?
  const char* userBaseDir = "";
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "issue-177.obj", userBaseDir);

  // if mtl loading fails, we get an warning message here
  ret &= warn.empty();

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }

  REQUIRE(true == ret);
}

TEST_CASE("line-primitive", "[line]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/line-prim.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }

  REQUIRE(true == ret);
  REQUIRE(1 == shapes.size());
  REQUIRE(6 == shapes[0].path.indices.size());
}

TEST_CASE("multiple-group-names", "[group]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/cube.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }

  REQUIRE(true == ret);
  REQUIRE(6 == shapes.size());
  REQUIRE(0 == shapes[0].name.compare("front cube"));
  REQUIRE(0 == shapes[1].name.compare("back cube"));  // multiple whitespaces
                                                      // are aggregated as
                                                      // single white space.
}

TEST_CASE("initialize_all_texopts", "[ensure unparsed texopts are initialized to defaults]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                              "../models/cornell_box.obj", gMtlBasePath, false);

  REQUIRE(0 < materials.size());

  #define REQUIRE_DEFAULT_TEXOPT(texopt)                \
    REQUIRE(tinyobj::TEXTURE_TYPE_NONE == texopt.type); \
    REQUIRE(0.0   == texopt.brightness);                \
    REQUIRE(1.0   == texopt.contrast);                  \
    REQUIRE(false == texopt.clamp);                     \
    REQUIRE(true  == texopt.blendu);                    \
    REQUIRE(true  == texopt.blendv);                    \
    REQUIRE(1.0   == texopt.bump_multiplier);           \
    for (int j = 0; j < 3; j++) {                       \
      REQUIRE(0.0 == texopt.origin_offset[j]);          \
      REQUIRE(1.0 == texopt.scale[j]);                  \
      REQUIRE(0.0 == texopt.turbulence[j]);             \
    }
  for (size_t i = 0; i < materials.size(); i++) {
    REQUIRE_DEFAULT_TEXOPT(materials[i].ambient_texopt);
    REQUIRE_DEFAULT_TEXOPT(materials[i].diffuse_texopt);
    REQUIRE_DEFAULT_TEXOPT(materials[i].specular_texopt);
    REQUIRE_DEFAULT_TEXOPT(materials[i].specular_highlight_texopt);
    REQUIRE_DEFAULT_TEXOPT(materials[i].bump_texopt);
    REQUIRE_DEFAULT_TEXOPT(materials[i].displacement_texopt);
    REQUIRE_DEFAULT_TEXOPT(materials[i].alpha_texopt);
    REQUIRE_DEFAULT_TEXOPT(materials[i].reflection_texopt);
    REQUIRE_DEFAULT_TEXOPT(materials[i].roughness_texopt);
    REQUIRE_DEFAULT_TEXOPT(materials[i].metallic_texopt);
    REQUIRE_DEFAULT_TEXOPT(materials[i].sheen_texopt);
    REQUIRE_DEFAULT_TEXOPT(materials[i].emissive_texopt);
    REQUIRE_DEFAULT_TEXOPT(materials[i].normal_texopt);
  }
  #undef REQUIRE_DEFAULT_TEXOPT
}

TEST_CASE("colorspace", "[Issue184]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string warn;
  std::string err;
  bool ret =
      tinyobj::LoadObj(&attrib, &shapes, &materials, &warn, &err,
                       "../models/colorspace-issue-184.obj", gMtlBasePath);

  if (!warn.empty()) {
    std::cout << "WARN: " << warn << std::endl;
  }

  if (!err.empty()) {
    std::cerr << "ERR: " << err << std::endl;
  }

  REQUIRE(true == ret);
  REQUIRE(1 == shapes.size());
  REQUIRE(1 == materials.size());
  REQUIRE(0 == materials[0].diffuse_texopt.colorspace.compare("sRGB"));
  REQUIRE(0 == materials[0].specular_texopt.colorspace.size());
  REQUIRE(0 == materials[0].bump_texopt.colorspace.compare("linear"));
}

// Fuzzer test.
// Just check if it does not crash.
// Disable by default since Windows filesystem can't create filename of afl
// testdata
#if 0 

TEST_CASE("afl000000", "[AFL]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &err, "./afl/id:000000,sig:11,src:000000,op:havoc,rep:128", gMtlBasePath);

  REQUIRE(true == ret);
}

TEST_CASE("afl000001", "[AFL]") {
  tinyobj::attrib_t attrib;
  std::vector<tinyobj::shape_t> shapes;
  std::vector<tinyobj::material_t> materials;

  std::string err;
  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &err, "./afl/id:000001,sig:11,src:000000,op:havoc,rep:64", gMtlBasePath);

  REQUIRE(true == ret);
}
#endif

#if 0
int
main(
  int argc,
  char **argv)
{
  if (argc > 1) {
    const char* basepath = NULL;
    if (argc > 2) {
      basepath = argv[2];
    }
    assert(true == TestLoadObj(argv[1], basepath));
  } else {
    //assert(true == TestLoadObj("cornell_box.obj"));
    //assert(true == TestLoadObj("cube.obj"));
    assert(true == TestStreamLoadObj());
    assert(true == TestLoadObj("catmark_torus_creases0.obj", NULL, false));
  }

  return 0;
}
#endif