package civilizationclone;

import civilizationclone.Tile.Tile;


public class Map {

    public Tile[][] map;
    public float[][] simplexNoise;

    public Map() {
        this.map = new Tile[80][40];
    }

    void generateMap(){
        simplexNoise = generateSimplexNoise(this.map.length,this.map[0].length);

        for(int i=0;i<simplexNoise.length;i++){
            for(int k=0;k<simplexNoise[i].length;k++){
                System.out.print(simplexNoise[i][k] + " ");
            }
            System.out.println("");
        }
    }

    float[][] generateSimplexNoise(int width, int height){
        float[][] simplexnoise = new float[width][height];
        float frequency = 0.04f;

        for(int x = 0; x < width; x++){
            for(int y = 0; y < height; y++){
                simplexnoise[x][y] = (float) noise(x * frequency,y * frequency);
                simplexnoise[x][y] = (simplexnoise[x][y] + 1) / 2;   //generate values between 0 and 1
            }
        }

        return simplexnoise;
   }

    public static double noise(double xin, double yin){
        int grad3[][] = {{1,1,0},{-1,1,0},{1,-1,0},{-1,-1,0},{1,0,1},{-1,0,1},{1,0,-1},{-1,0,-1},{0,1,1},{0,-1,1},{0,1,-1},{0,-1,-1}};
        int p[] = {151,160,137,91,90,15,131,13,201,95,96,53,194,233,7,225,140,36,103,30,69,142,8,99,37,240,21,10,23,190,6,148,247,120,234,75,0,26,197,62,94,252,219,203,117,35,11,32,57,177,33,88,237,149,56,87,174,20,125,136,171,168,68,175,74,165,71,134,139,48,27,166,77,146,158,231,83,111,229,122,60,211,133,230,220,105,92,41,55,46,245,40,244,  102,143,54, 65,25,63,161, 1,216,80,73,209,76,132,187,208, 89,18,169,200,196,  135,130,116,188,159,86,164,100,109,198,173,186, 3,64,52,217,226,250,124,123,  5,202,38,147,118,126,255,82,85,212,207,206,59,227,47,16,58,17,182,189,28,42,  223,183,170,213,119,248,152, 2,44,154,163, 70,221,153,101,155,167, 43,172,9,  129,22,39,253, 19,98,108,110,79,113,224,232,178,185, 112,104,218,246,97,228,  251,34,242,193,238,210,144,12,191,179,162,241, 81,51,145,235,249,14,239,107,  49,192,214, 31,181,199,106,157,184, 84,204,176,115,121,50,45,127, 4,150,254,  138,236,205,93,222,114,67,29,24,72,243,141,128,195,78,66,215,61,156,180};
        int perm[] = new int[512];
        for(int i=0; i<512; i++) perm[i]=p[i & 255];

        double n0,n1,n2;

        final double F2 = 0.5*(Math.sqrt(3.0)-1.0);
        double s = (xin+yin)*F2;
        int i = fastfloor(xin+s);
        int j = fastfloor(yin+s);

        final double G2 = (3.0-Math.sqrt(3.0))/6.0;
        double t = (i+j)*G2;
        double X0 = i-t;
        double Y0 = j-t;
        double x0 = xin-X0;
        double y0 = yin-Y0;

        int i1, j1;
        if(x0>y0){
            i1=1;
            j1=0;
        }else{
            i1=0;
            j1=1;
        }

        double x1 = x0 - i1 + G2;
        double y1 = y0 - j1 + G2;
        double x2 = x0 - 1.0 + 2.0 * G2;
        double y2 = y0 - 1.0 + 2.0 * G2;

        int ii = i & 255;
        int jj = j & 255;
        int gi0 = perm[ii+perm[jj]] % 12;
        int gi1 = perm[ii+i1+perm[jj+j1]] % 12;
        int gi2 = perm[ii+1+perm[jj+1]] % 12;

        double t0 = 0.5 - x0*x0-y0*y0;
        if(t0<0){
            n0 = 0.0;
        }else{
            t0 *= t0;
            n0 = t0*t0*dot(grad3[gi0],x0,y0);
        }

        double t1 = 0.5 - x1*x1-y1*y1;
        if(t1<0){
            n1 = 0.0;
        }
        else{
            t1 *= t1;
            n1 = t1 * t1 * dot(grad3[gi1], x1, y1);
        }

        double t2 = 0.5 - x2*x2-y2*y2;
        if(t2<0){
            n2 = 0.0;
        }
        else {
            t2 *= t2;
            n2 = t2 * t2 * dot(grad3[gi2], x2, y2);
        }

        return 70.0 * (n0 + n1 + n2);
    }

    private static double dot(int g[], double x, double y) {    return g[0]*x + g[1]*y; }
    private static int fastfloor(double x) {    return x>0 ? (int)x : (int)x-1;  }
}