// 0 - Plot
// 1 - Plant
// 2 - Anti-plant
// 3 - barrier
let grid =   [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	      0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	      0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	      0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	      0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	      0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	      0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	      0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	      0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	      0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	      0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	      0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	      0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	      0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	      0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
	      0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];

let current_tile = 0;

let clock_on = false;

function toggle_clock(check)
{
	clock_on = !clock_on;
	if(clock_on) {
		check.innerHTML = "Clock is ON";
	} else {
		check.innerHTML= "Clock is OFF";
	}
}

function clock()
{
	if(clock_on) {
		tick();
	}
}

function set_tile(i)
{
	current_tile = i;
}

function cell_click(cell, i)
{
	if(clock_on) {
		return;
	}
	grid[i] = current_tile;
	update_grid();
}

function update_grid() {
	let i = 0;
	while(i < 256)
	{
		if(grid[i] == 0) {
			document.getElementById(i).classList = "cell";
		} else if(grid[i] == 1) {
			document.getElementById(i).classList = "cell plant";
		} else if(grid[i] == 2) {
			document.getElementById(i).classList = "cell anti";
		} else if(grid[i] == 3) {
			document.getElementById(i).classList = "cell barrier";
		}

		i++;
	}
}

function tick()
{
	let i = 0;
	let north = 0;
	let south = 0;
	let east = 0;
	let west = 0;
	let new_grid = structuredClone(grid);

	while(i < 256)
	{
		north = i-16;
		south = i+16;
		east = i+1;
		west = i-1;
		if(i % 16 == 0) {
			west = -1;
		} else if(i % 16 == 15) {
			east = -1;
		}
		if(i < 16) {
			north = -1;
		} else if(i > 239) {
			south = -1;
		}

		if(grid[i] == 1) {
			if(north >= 0 && new_grid[north] == 0) { new_grid[north] = 1; }
			if(east >= 0 && new_grid[east] == 0) { new_grid[east] = 1; }
			if(west >= 0 && new_grid[west] == 0) { new_grid[west] = 1; }
			if(south >= 0 && new_grid[south] == 0) { new_grid[south] = 1; }
			if(north >= 0 && new_grid[north] == 2 && Math.floor(Math.random() * 10) == 0) { new_grid[north] = 1; }
			if(east >= 0 && new_grid[east] == 2 && Math.floor(Math.random() * 10) == 0) { new_grid[east] = 1; }
			if(west >= 0 && new_grid[west] == 2 && Math.floor(Math.random() * 10) == 0) { new_grid[west] = 1; }
			if(south >= 0 && new_grid[south] == 2 && Math.floor(Math.random() * 10) == 0) { new_grid[south] = 1; }
		} else if(grid[i] == 2) {
			if(north >= 0 && new_grid[north] == 0) { new_grid[north] = 2; }
			if(east >= 0 && new_grid[east] == 0) { new_grid[east] = 2; }
			if(west >= 0 && new_grid[west] == 0) { new_grid[west] = 2; }
			if(south >= 0 && new_grid[south] == 0) { new_grid[south] = 2; }
			if(north >= 0 && new_grid[north] == 1 && Math.floor(Math.random() * 10) == 0) { new_grid[north] = 2; }
			if(east >= 0 && new_grid[east] == 1 && Math.floor(Math.random() * 10) == 0) { new_grid[east] = 2; }
			if(west >= 0 && new_grid[west] == 1 && Math.floor(Math.random() * 10) == 0) { new_grid[west] = 2; }
			if(south >= 0 && new_grid[south] == 1 && Math.floor(Math.random() * 10) == 0) { new_grid[south] = 2; }
		}	

		i++;
	}

	grid = structuredClone(new_grid);
	update_grid();
}

function kill_living() {
	if(clock_on) {
		return;
	}

	let i = 0;
	while(i < 256)
	{
		if(grid[i] == 1 || grid[i] == 2) {
			grid[i] = 0;
		}

		i++;
	}
	update_grid();
}

function clear_board() {
	if(clock_on) {
		return;
	}
	
	let i = 0;
	while(i < 256)
	{
		grid[i] = 0;
		i++;
	}
	update_grid();
}

setInterval(clock, 50);