/** Copyright (C) 2013 Robert B. Colton, Josh Ventura
***
*** This file is a part of the ENIGMA Development Environment.
***
*** ENIGMA is free software: you can redistribute it and/or modify it under the
*** terms of the GNU General Public License as published by the Free Software
*** Foundation, version 3 of the license or any later version.
***
*** This application and its source code is distributed AS-IS, WITHOUT ANY
*** WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
*** FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
*** details.
***
*** You should have received a copy of the GNU General Public License along
*** with this code. If not, see <http://www.gnu.org/licenses/>
**/

#include <stdio.h>
#include <iostream>
#include <fstream>

using namespace std;

#include "syntax/syncheck.h"
#include "parser/parser.h"

#include "backend/EnigmaStruct.h" //LateralGM interface structures
#include "parser/object_storage.h"
#include "compiler/compile_common.h"

#include <math.h> //log2 to calculate passes.

#define flushl '\n' << flush
#define flushs flush

#include "languages/lang_CPP.h"

#define SHADERSTRUCT "struct ShaderStruct { \
    string fragment; \
    string vertex; \
    string type; \
    bool precompile; \
  }; "

static string esc(string str) {
  string res;
  res.reserve(str.length);
  for (size_t i = 0; i < str.length(); ++i) {
    char c = str[i];
    if (c == '\n') { res += "\\n"; continue; }
    if (c == '\r') { res += "\\r"; continue; }
    if (c == '\\') { res += "\\\\"; continue; }
    res.append(c);
  }
  return res;
}

int lang_CPP::compile_writeShaderData(EnigmaStruct* es, parsed_object *EGMglobal)
{
  ofstream wto("ENIGMAsystem/SHELL/Preprocessor_Environment_Editable/IDE_EDIT_shaderarrays.h",ios_base::out);

  wto << license << "namespace enigma {\n"
  wto << "  ShaderStruct shaderstructarray[] = {
  
  int idmax = 0;
  for (int i = 0; i < es->shaderCount; i++)
  {
    while (idmax < es->shaders[i].id)
      ++idmax, wto << "ShaderStruct(),\n";
    wto << "    { "
        << '"' << esc(es->shaders[i].vertex)   << "\", "
        << '"' << esc(es->shaders[i].fragment) << "\", "
        << '"' << es->shaders[i].type << "\", "
        << (es->shaders[i].precompile? "true" : "false")
        << " },\n";
  }
  
  wto << "  };\n";
  wto << "} // Namespace enigma\n";
  wto.close();
  
  return 0;
}