// title:  game of life
// author: Simon Cambier
// desc:   short description
// script: js

const width = 240;
const height = 136;

let state: boolean[][] = [];
let next: boolean[][] = [];
let generation = 0;

function BOOT() {
  for (let i = 0; i < width; i++) {
    state[i] = [];
    next[i] = [];
    for (let j = 0; j < height; j++) {
      state[i][j] = Math.random() > 0.5;
      next[i][j] = false;
    }
  }
}

function TIC() {
  cls(13);

  for (let i = 0; i < width; i++) {
    for (let j = 0; j < height; j++) {
      let count = 0;

      // Use modulo to wrap around the edges
      if (state[(i - 1 + width) % width][(j - 1 + height) % height]) count++; // top left
      if (state[(i - 1 + width) % width][j]) count++; // top
      if (state[(i - 1 + width) % width][(j + 1) % height]) count++; // top right
      if (state[i][(j - 1 + height) % height]) count++; // left
      if (state[i][(j + 1) % height]) count++; // right
      if (state[(i + 1) % width][(j - 1 + height) % height]) count++; // bottom left
      if (state[(i + 1) % width][j]) count++; // bottom
      if (state[(i + 1) % width][(j + 1) % height]) count++; // bottom right

      // Currently alive
      if (state[i][j]) {
        if (count < 2) {
          next[i][j] = false;
        } else if (count > 3) {
          next[i][j] = false;
        } else {
          next[i][j] = true;
        }
      }
      // Currently dead
      else {
        if (count === 3) {
          next[i][j] = true;
        } else {
          next[i][j] = false;
        }
      }
    }
  }

  // Swap state and next
  // Use a temp var, otherwise state and next will be the same object
  let temp = state;
  state = next;
  next = temp;

  for (let i = 0; i < width; i++) {
    for (let j = 0; j < height; j++) {
      if (state[i][j]) {
        pix(i, j, 7);
      }
    }
  }

  print(`Generation: ${++generation}`, 1, 1, 0);
}