package Engine;

public class Engine {
    private int sizeX;
    private int sizeY;
    private int iterations;
    private boolean[][] game;

    public Engine(int k, int l){
        this.sizeX = k;
        this.sizeY = l;
        this.iterations = 1;

        game = new boolean[k][l];
        for(int i = 0; i<k; i++){
            for(int j = 0; j<l; j++){
                game[i][j] = false;
            }
        }

        game[1][0] = true;
        game[2][1] = true;
        game[0][2] = true;
        game[1][2] = true;
        game[2][2] = true;
    }

    private boolean isAlive(int x, int y){
        int celAlive = 0;
        for(int i=(x-1); i<=(x+1); i++){
            for(int j=(y-1); j<=(y+1); j++){
                if(i<sizeX && i>=0 && j<sizeY && j>=0){
                    if(game[i][j] && !(i==x && j==y)){
                        celAlive++;
                        //System.out.println(">"+i+"."+j+"<\n");
                    }
                }
            }
        }

        if(game[x][y]){
            /* Cellule vivante */
            if(celAlive==2 || celAlive==3)
                return true;
            else
                return false;
        } else {
            /* Cellule morte */
            if(celAlive==3)
                return true;
            else
                return false;
        }
    }

    public void printGame(){
        for(int j=0; j<sizeY; j++){
            for(int i=0; i<sizeX; i++){
                //System.out.print(i+"."+j);
                if(game[i][j])
                    System.out.print("\033[1;31mO\033[0m");
                else
                    System.out.print(".");
            }
            System.out.println();
        }
    }

    public void nextSlide(){
        boolean[][] gameb = new boolean[sizeX][sizeY];
        for(int i=0; i<sizeX; i++){
            for(int j=0; j<sizeY; j++){
                //System.out.print(i+"."+j+" ");
                if(isAlive(i, j))
                    gameb[i][j] = true;
                else
                    gameb[i][j] = false;
            }
        }
        this.game = gameb;
    }

    public void wait(int secs)
    {
        try {
            Thread.sleep(secs);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    public void clear(){
        char esc = 27;
        String clear = esc + "[2J";
        System.out.print(clear);
    }

    private void printInformations(){
        System.out.print("\033[40m\033[1;37m");
        String text = ("GameOfLife      ["+this.iterations+"]");
        System.out.print(text);
        for(int i=0; i<(sizeX-text.length()); i++){
            System.out.print(" ");
        }
        System.out.println("\033[0m");
    }

    public void launch(int ms, int iterations){
        for(int i=0;i<iterations;i++){
            clear();
            printGame();
            printInformations();
            wait(ms);
            nextSlide();
            this.iterations++;
        }
    }
}