extends Node

const CHUNK_SIZE: int = 12;
const CHUNK_DOUBLE: int = CHUNK_SIZE*2;

func _get_player_position() -> Vector2i:
	return Vector2i(1, 1)


# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	pass # Replace with function body.


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	pass

func _on_exited_chunk():
	$VisibleOnScreenNotifier2D.global_position = (get_tree().get_first_node_in_group("Player").global_position)
	
	var thread: Thread = Thread.new()
	thread.start(func(): _populate_terrain())
	thread.wait_to_finish()
	
func _populate_terrain():
	var player_position: Vector2i = _get_player_position()
	
	for i in range(-CHUNK_DOUBLE, CHUNK_DOUBLE):
		for j in range(-CHUNK_DOUBLE, CHUNK_DOUBLE):
			var pos: Vector2i = player_position + Vector2i(i, j)
			if _is_empty(pos):
				_populate_cell(pos, _pick_random_tile())
				

func _populate_cell(pos: Vector2i, tile: Vector2i) -> void:
	$Ground.set_cell.call_deferet(pos, 1, tile, 0)
	
func _pick_random_tile() -> Vector2i:
	# Make all Tiles green
	return Vector2i(1, 1)
	
func _is_empty(pos: Vector2i) -> bool:
	# Check if the cell is empty (source_id is -1)
	return true if $Ground.get_cell_source_id(pos) == -1 else false;