#include <stdlib.h>
#include <GL/glut.h>
#include "Utilities.h"
#include "MapBlock.h"
#include "Base.h"
#include "NodeRenderer.h"
#include "TextureHandler.h"
#include <math.h>
#include <cstdio>
#include "FastNoiseLite.h"
#include <random>
//#include <SFML/System.hpp>
//#include <SFML/Window.hpp>

NodeRenderer renderer;
//BlockManager blockManager;

BlockManager blockManager;
TextureHandler textureHandler;

GLfloat playerX = 0;
GLfloat playerY = -30;
GLfloat playerZ = -100;
GLfloat playerRotX = 0;
GLfloat playerRotY = 0;



void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();


    glRotatef(playerRotX, 1.0F, .0F, .0F);
    glRotatef(playerRotY, .0F, 1.0F, .0F);
    glTranslatef(playerX, playerY, playerZ);
    //glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);

    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);


    glBegin(GL_QUADS);


        for(int x = 0; x < 128; x++)
        {
            for(int z = 0; z < 128; z++)
            {
                for(int y = 0; y < 64; y++)
                {
                    Position2D block = BlockUtilities::getBlockFromNodeCoordinates(x, z);

                    // Math explanation for future reference:
                    // The if statement below checks if the node at the coordinate is greater than 0 (0 = air), the x and z coordinates
                    // need to be have block.[AXIS] * 16 subtracted from them so that the coordinates passed to the function are local
                    // block coordinates instead of global node coordinates (e.g. 1, and not 17)
                    if(blockManager.getNodeAt(x, y, z) > 0)
                    {
                        textureHandler.getTextureForNode(x, y, z);
                        renderer.renderNode(x, y, z);
                    }
                }
            }
        }

    glEnd();

    glFlush();
    glutSwapBuffers();
/*
    sf::Vector2i lastMousePos = sf::Vector2i(0, 0);
    const sf::Window& window = nullptr;
    sf::Vector2i mouseDelta = sf::Mouse::getPosition(window) - lastMousePos;
    lastMousePos = sf::Mouse::getPosition(window);*/
    //glutPostRedisplay();

}


void reshape(int width, int height)
{
    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();
    gluPerspective(20, width / (float) height, 5, 512.0F);
    glViewport(0, 0, width, height);

    glMatrixMode(GL_MODELVIEW);
    glutPostRedisplay();
}

void updateTimer(int time)
{
    glutPostRedisplay();
    glutTimerFunc(30, &updateTimer, 0);
}

void KeyboardFunc(unsigned char key, int x, int y)
{
    if(key == 'a')
    {
        playerX += .8F;
    }

    if(key == 'd')
    {
        playerX -= .8F;
    }

    if(key == 'w')
    {
        playerZ += .8;
    }

    if(key == 's')
    {
        playerZ -= .8;
    }

    if(key == 'q')
    {
        playerY += .8F;
    }

    if(key == 'e')
    {
        playerY -= .8F;
    }

    if(key == 't')
    {
        playerRotX -= .8F;
    }

    if(key == 'g')
    {
        playerRotX += .8F;
    }

    if(key == 'f')
    {
        playerRotY -= .8F;
    }

    if(key == 'h')
    {
        playerRotY += .8F;
    }




    if(key == 27)
    {
        exit(0);
    }


}







int	main(int argc, char **argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutInitWindowSize(800, 600);
    glutCreateWindow("XtreemNodes Engine - By MCL Software and Cube Software");

    glClearColor(.4, .7, .8 , 255);
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_TEXTURE_2D);
    //glEnable(GL_CULL_FACE);
    //glCullFace(GL_FRONT);
    //glFrontFace(GL_CCW);

    // Load textures
    textureHandler.loadAllTextures();


    FastNoiseLite perlin, os, cellular;
    int seed = 1338;
    perlin.SetSeed(seed);
    perlin.SetNoiseType(FastNoiseLite::NoiseType_Perlin);
    perlin.SetFrequency(.01F);

    os.SetSeed(seed);
    os.SetNoiseType(FastNoiseLite::NoiseType_OpenSimplex2);
    os.SetFrequency(.01F);

    cellular.SetSeed(seed);
    cellular.SetNoiseType(FastNoiseLite::NoiseType_Cellular);
    cellular.SetFrequency(.1F);

    for(int bx = 0; bx < 16; bx++)
    {
        for(int bz = 0; bz < 16; bz++)
        {
            for(int x = 0; x < 16; x++)
            {
                for(int z = 0; z < 16; z++)
                {
                    float cX = (float)x + (16 * bx);
                    float cZ = (float)z + (16 * bz);
                    for(int y = 0; y < 48 * abs(perlin.GetNoise(cX, cZ)) + (cellular.GetNoise(cX, cZ)) + 2; y++)
                    {
                        blockManager.mapBlocks[bx][bz].addNode(y > 30 ? 1 : 2, 0, x, y, z);
                    }
                }
            }
        }
    }




/*
    for(int x = 0; x < 32; x++)
    {
        for(int z = 0; z < 16; z++)
        {
            for(int y = 0; y < 16; y++)
            {
                Position2D block = BlockUtilities::getBlockFromNodeCoordinates(x, z);
                printf("x - (blockX * 16): %i | X: %i, Y: %i, Z: %i, blockX: %i, blockZ: %i nodeAt: %i\n", x - (block.x * 16), x, y, z, block.x, block.z, blockManager.mapBlocks[block.x][block.z].getNodeAt(x - (block.x * 16), y, z));

            }
        }
    }
*/





    updateTimer(0);
    glutDisplayFunc(&display);
    glutReshapeFunc(&reshape);
    glutKeyboardFunc(&KeyboardFunc);

    glutMainLoop();

    return 0;
}