/* bzflag
 * Copyright (c) 1993-2017 Tim Riker
 *
 * This package is free software;  you can redistribute it and/or
 * modify it under the terms of the license found in the file
 * named COPYING that should have accompanied this file.
 *
 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#include "common.h"

/* interface header */
#include "CustomTetra.h"

/* common implementation headers */
#include "TetraBuilding.h"
#include "TextureMatrix.h"
#include "ObstacleMgr.h"

/* bzfs implementation headers */
#include "ParseMaterial.h"


CustomTetra::CustomTetra(): vertices(), normals(), texcoords()
{
  vertexCount = 0; // no vertices have yet been defined

  // reset the secondary coordinate states
  for (int i = 0; i < 4; i++) {
    useNormals[i] = false;
    useTexcoords[i] = false;
    materials[i].setTexture("mesh");
  }
  return;
}


bool CustomTetra::read(const char *cmd, std::istream& input)
{
  if (vertexCount > 4) {
    std::cout << "Extra tetrahedron vertex" << std::endl;
    // keep on chugging
    return true;
  }

  bool materror;
  if (vertexCount == 0) {
    // try to parse all 4 materials
    if (parseMaterials(cmd, input, materials, 4, materror)) {
      return !materror;
    }
  } else {
    // try to parse the specific vertex's material
    int vc = vertexCount - 1;
    if (vc > 3) {
      vc = 3;
    }
    if (parseMaterials(cmd, input, &materials[vc], 1, materror)) {
      return !materror;
    }
  }

  if (strcasecmp(cmd, "vertex") == 0) {
    if (vertexCount >= 4) {
      std::cout << "Extra tetrahedron vertex" << std::endl;
      // keep on chugging
    }
    else {
      float* vertex = vertices[vertexCount];
      input >> vertex[0] >> vertex[1] >> vertex[2];
      vertexCount++;
    }
  }
  else if (strcasecmp(cmd, "normals") == 0) {
    if (vertexCount < 1) {
      std::cout << "Normals defined before any vertex" << std::endl;
      // keep on chugging
    }
    else if (vertexCount > 4) {
      std::cout << "Extra tetrahedron normals" << std::endl;
      // keep on chugging
    }
    else {
      useNormals[vertexCount - 1] = true;
      for (int v = 0; v < 3; v++) {
	float* normal = normals[vertexCount - 1][v];
	input >> normal[0] >> normal[1] >> normal[2];
      }
    }
  }
  else if (strcasecmp(cmd, "texcoords") == 0) {
    if (vertexCount < 1) {
      std::cout << "Texcoords defined before any vertex" << std::endl;
      // keep on chugging
    }
    else if (vertexCount > 4) {
      std::cout << "Extra tetrahedron texcoords" << std::endl;
      // keep on chugging
    }
    else {
      useTexcoords[vertexCount - 1] = true;
      for (int v = 0; v < 3; v++) {
	float* texcoord = texcoords[vertexCount - 1][v];
	input >> texcoord[0] >> texcoord[1];
      }
    }
  }
  else {
    return WorldFileObstacle::read(cmd, input);
  }

  return true;
}


void CustomTetra::writeToGroupDef(GroupDefinition *groupdef) const
{
  if (vertexCount < 4) {
    std::cout << "Not creating tetrahedron, not enough vertices ("
	      << vertexCount << ")" << std::endl;
    return;
  }

  const BzMaterial* mats[4];
  for (int i = 0; i < 4; i++) {
    mats[i] = MATERIALMGR.addMaterial(&materials[i]);
  }
  TetraBuilding* tetra = new TetraBuilding(transform, vertices, normals, texcoords,
					   useNormals, useTexcoords,
					   mats, driveThrough, shootThrough, ricochet);
  if (tetra->isValid()) {
    groupdef->addObstacle(tetra);
  } else {
    std::cout << "Error generating tetra obstacle." << std::endl;
    delete tetra;
  }

  return;
}


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