extends Node2D
class_name Pentagram

var A: Vector2
var B: Vector2
var C: Vector2
var D: Vector2
var E: Vector2
var center: Vector2
var radius: int
var points: Array
var indexes: Array
var snaped = false
var snap_addr = 0

func _ready():
	self.refresh()
	get_viewport().size_changed.connect(self.refresh)
	self.indexes = [
		0, 1, 2, 3, 4
	]
	
func refresh():
	var view = get_viewport()
	self.radius = 256
	self.center = view.size/2
	var x = -PI/5
	var y = -PI/16
	self.A = self.center + self.get_point(-PI/2 - x) * self.radius
	self.B = self.center + self.get_point(0 - y) * self.radius
	self.C = self.center + self.get_point(PI/2) * self.radius
	self.D = self.center + self.get_point(PI + y) * self.radius
	self.E = self.center + self.get_point(-PI/2 + x) * self.radius
	self.points = [self.A, self.B, self.C, self.D, self.E]
	
func _draw():
	# draw_circle(self.center, self.radius, Color.BLACK)
	var w = 8
	draw_line(self.A, self.C, Color.DARK_RED, w)
	draw_line(self.C, self.E, Color.DARK_RED, w)
	draw_line(self.E, self.B, Color.DARK_RED, w)
	draw_line(self.B, self.D, Color.DARK_RED, w)
	draw_line(self.D, self.A, Color.DARK_RED, w)

func get_point(angle):
	return Vector2(cos(angle), sin(angle))

func nearest(rune):
	var point = null
	var dist = null
	for pts in self.points:
		var d = rune.distance_squared_to(pts)
		if dist == null or dist < d:
			dist = d
			point = pts
	return point

func snap(pos: Vector2, dist):
	self.snaped = false
	for pts in self.points:
		if pos.distance_squared_to(pts) < dist * dist:
			self.snaped = true
			self.snap_addr = self.points.find(pts)
			return pts
	return pos