#include <cppunit/extensions/HelperMacros.h>
#include <cppunit/TestCaller.h>
#include <cppunit/TestCase.h>
#include <cppunit/TestSuite.h>

#include "FTInternals.h"
#include "FTVectoriser.h"


void CALLBACK ftglError(GLenum errCode, FTMesh* mesh);
void CALLBACK ftglVertex(void* data, FTMesh* mesh);
void CALLBACK ftglBegin(GLenum type, FTMesh* mesh);
void CALLBACK ftglEnd(FTMesh* mesh);
void CALLBACK ftglCombine(FTGL_DOUBLE coords[3], void* vertex_data[4], GLfloat weight[4], void** outData, FTMesh* mesh);


static float POINT_DATA[] =
{
    10, 3, 0.7,
    -53, 2000, 23,
    77, -2.4, 765,
    117.5,  0.02, -99,
    10,    3,    -0.87,
    117.5, 0.02, 34.76,
    0.27,  44.4, 3000,
    10,    3,    0
};

class FTMeshTest : public CppUnit::TestCase
{
    CPPUNIT_TEST_SUITE(FTMeshTest);
        CPPUNIT_TEST(testGetTesselation);
        CPPUNIT_TEST(testAddPoint);
        CPPUNIT_TEST(testTooManyPoints);
    CPPUNIT_TEST_SUITE_END();

    public:
        FTMeshTest() : CppUnit::TestCase("FTMesh Test")
        {}

        FTMeshTest(const std::string& name) : CppUnit::TestCase(name)
        {}

        void testGetTesselation()
        {
            FTMesh mesh;

            CPPUNIT_ASSERT(mesh.Tesselation(0) == NULL);

            ftglBegin(GL_TRIANGLES, &mesh);
            ftglVertex(&POINT_DATA[0], &mesh);
            ftglVertex(&POINT_DATA[3], &mesh);
            ftglVertex(&POINT_DATA[6], &mesh);
            ftglVertex(&POINT_DATA[9], &mesh);
            ftglEnd(&mesh);

            CPPUNIT_ASSERT(mesh.Tesselation(0));
            CPPUNIT_ASSERT(mesh.Tesselation(10) == NULL);
        }


        void testAddPoint()
        {
            FTGL_DOUBLE testPoint[3] = { 1, 2, 3 };
            FTGL_DOUBLE* hole[] = { 0, 0, 0, 0 };
            void *pHole = (void *)hole;

            FTMesh mesh;
            CPPUNIT_ASSERT(mesh.TesselationCount() == 0);

            ftglBegin(GL_TRIANGLES, &mesh);
            ftglVertex(&POINT_DATA[0], &mesh);
            ftglVertex(&POINT_DATA[3], &mesh);
            ftglVertex(&POINT_DATA[6], &mesh);
            ftglVertex(&POINT_DATA[9], &mesh);
            ftglEnd(&mesh);

            CPPUNIT_ASSERT(mesh.TesselationCount() == 1);
            CPPUNIT_ASSERT(mesh.Tesselation(0)->PolygonType() == GL_TRIANGLES);
            CPPUNIT_ASSERT(mesh.Tesselation(0)->PointCount() == 4);
            CPPUNIT_ASSERT(mesh.Error() == 0);

            ftglBegin(GL_QUADS, &mesh);
            ftglVertex(&POINT_DATA[12], &mesh);
            ftglVertex(&POINT_DATA[15], &mesh);
            ftglError(2, &mesh);
            ftglVertex(&POINT_DATA[18], &mesh);
            ftglCombine(testPoint, NULL, NULL, &pHole, &mesh);
            ftglVertex(&POINT_DATA[21], &mesh);
            ftglError(3, &mesh);
            ftglEnd(&mesh);

            CPPUNIT_ASSERT(mesh.TesselationCount() == 2);
            CPPUNIT_ASSERT(mesh.Tesselation(0)->PointCount() == 4);
            CPPUNIT_ASSERT(mesh.Tesselation(1)->PolygonType() == GL_QUADS);
            CPPUNIT_ASSERT(mesh.Tesselation(1)->PointCount() == 4);
            CPPUNIT_ASSERT(mesh.Error() == 3);

            CPPUNIT_ASSERT(mesh.TesselationCount() == 2);
        }


        void testTooManyPoints()
        {
            FTGL_DOUBLE testPoint[3] = { 1, 2, 3};

            FTGL_DOUBLE* testOutput[] = { 0, 0, 0, 0};
            void *pOutput = (void *)testOutput;
            FTGL_DOUBLE* hole[] = { 0, 0, 0, 0};
            void *pHole = (void *)hole;

            FTMesh mesh;
            unsigned int x;

            ftglBegin(GL_TRIANGLES, &mesh);
            ftglCombine(testPoint, NULL, NULL, &pOutput, &mesh);

            for(x = 0; x < 200; ++x)
            {
                ftglCombine(testPoint, NULL, NULL, &pHole, &mesh);
            }

            CPPUNIT_ASSERT(*testOutput == static_cast<const FTGL_DOUBLE*>(mesh.TempPointList().front()));

            for(x = 201; x < 300; ++x)
            {
                ftglCombine(testPoint, NULL, NULL, &pHole, &mesh);
            }

            ftglEnd(&mesh);

            CPPUNIT_ASSERT(*testOutput == static_cast<const FTGL_DOUBLE*>(mesh.TempPointList().front()));
        }

        void setUp()
        {}


        void tearDown()
        {}

    private:
};

CPPUNIT_TEST_SUITE_REGISTRATION(FTMeshTest);