extends Node2D


const CELL_SIZE: int = 32

@onready var map: TileMap = $TileMap
@onready var marker_from: Node2D = $MarkerFrom
@onready var marker_to: Node2D = $MarkerTo
@onready var path_line: Line2D = $PathLine
@onready var check_box: CheckBox = $CheckBox

var astar: MultilevelAStar
var used_rect: Rect2i


# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	# mapa začne na -1, -1. tukaj premaknem da se vidi vse na mapi
	# (saj verjetno obstaja boljši način ma ga ne poznam - mogoče kakšna kamera)
	position = Vector2i.ONE * CELL_SIZE
	
	used_rect = map.get_used_rect()
	print(used_rect)
	
	astar = MultilevelAStar.new(map)
	
	mark_units()
	
	marker_from.modulate = Color.html("#ff0000ff")
	marker_to.modulate = Color.html("#00ff00ff")
	
	marker_from.position = Vector2i(-1, -1) * CELL_SIZE
	marker_to.position = (used_rect.position + used_rect.size - Vector2i.ONE) * CELL_SIZE
	
	find_path()


func mark_units() -> void:
	for unit in $Units.get_tree().get_nodes_in_group("unit"):
		astar.set_unit(unit.position / CELL_SIZE)


func _unhandled_input(event: InputEvent) -> void:
	if event is InputEventMouseButton:
		if event.pressed:
			var cell := map.local_to_map(map.get_local_mouse_position())
			if map.get_used_rect().has_point(cell):
				if event.button_index == 1:
					marker_to.position = Vector2(cell.x * CELL_SIZE, cell.y * CELL_SIZE)
					find_path();
				elif event.button_index == 2:
					marker_from.position = Vector2(cell.x * CELL_SIZE, cell.y * CELL_SIZE)
					find_path();


func find_path() -> void:
	path_line.clear_points()
	
	var from: Vector2i = Vector2i(marker_from.position / CELL_SIZE)
	var to: Vector2i = Vector2i(marker_to.position / CELL_SIZE)
	
	var arr = astar.find_path(from, to, check_box.button_pressed) # vrne Variant: null ali Array
	#print(arr)
	#print(arr.size())
	
	if arr.size() > 1: # if the start and the end are the same there is no line to draw
		# add new path
		for vec in arr:
			#print("%s, %s" % [vec.x, vec.y])
			path_line.add_point(vec * CELL_SIZE + Vector2i(16, 16))


func _on_check_box_pressed() -> void:
	find_path()