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#if defined( _WIN32)
#include <windows.h>
#endif


#include <osdutil/uniformEvaluator.h>
#include <osdutil/topology.h>

#include <osd/error.h>

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

#ifdef OPENSUBDIV_HAS_OPENMP
    #include <omp.h>
#endif

using namespace OpenSubdiv;


//------------------------------------------------------------------------------
static bool
createOsdMesh(char *inputFile, char *outputFile, std::string *errorMessage)
{

    PxOsdUtilSubdivTopology topology;
    std::vector<float> pointPositions;
    
    if (not topology.ReadFromObjFile(inputFile, &pointPositions, errorMessage))
        return false;

    PxOsdUtilUniformEvaluator uniformEvaluator;

    // Create uniformEvaluator
    if (not uniformEvaluator.Initialize(topology, errorMessage)) {
        return false;
    }

    // Push the vertex data
    uniformEvaluator.SetCoarsePositions(pointPositions, errorMessage);

    // Refine with eight threads
    if (not uniformEvaluator.Refine(8, errorMessage))
        return false;
    
    std::vector<int> refinedQuads;
    if (not uniformEvaluator.GetRefinedQuads(&refinedQuads, errorMessage)) {
        std::cout  << "GetRefinedQuads failed with " << *errorMessage << std::endl;        
    }

    float *refinedPositions = NULL;
    int numFloats = 0;
    if (not uniformEvaluator.GetRefinedPositions(&refinedPositions, &numFloats, errorMessage)) {
        std::cout  << "GetRefinedPositions failed with " << *errorMessage << std::endl;        
    }
    
    std::cout << "Quads = " << refinedQuads.size()/4 << std::endl;        
    for (int i=0; i<(int)refinedQuads.size(); i+=4)  {
        std::cout << "(" << refinedQuads[i] <<
            ", " << refinedQuads[i+1] <<
            ", " << refinedQuads[i+2] <<
            ", " << refinedQuads[i+3] <<
            ")\n";
    }
        
    std::cout << "Hot damn, it worked.\n";
    std::cout << "Positions = " << numFloats/3 << std::endl;
    for (int i=0; i<numFloats; i+=3)  {
        std::cout << "(" << refinedPositions[i] <<
            ", " << refinedPositions[i+1] <<
            "," << refinedPositions[i+2] << ")\n";
    }



//    if (not uniformEvaluator.WriteRefinedObj("foo.obj", errorMessage)) {
//        std::cout << errorMessage << std::endl;             
//    }


    return true;
}

//------------------------------------------------------------------------------
static void
callbackError(OpenSubdiv::OsdErrorType err, const char *message)
{
    printf("OsdError: %d\n", err);
    printf("%s", message);
}


//------------------------------------------------------------------------------
int main(int argc, char** argv) {


    if (argc < 3) {
        std::cout << "Usage: projectTest input.obj output\n";
        return false;
    }

    std::cout << "input is " << argv[1] << " and output is " << argv[2] <<std::endl;


    OsdSetErrorCallback(callbackError);

    std::string errorMessage;

    if (not createOsdMesh(argv[1], argv[2], &errorMessage)) {
        std::cout << "Failed with error: " << errorMessage << std::endl;
    }

}