extends Control

export var default_width = 500
export var default_height = 500
export var default_spacing = 5

var data = {
	width = default_width,
	height = default_height,
	spacing = default_spacing
}

var polygon_data = {
	width = 500,
	height = 500,
	spacing = 1.5
}

var poisson_disc_sampling: PoissonDiscSampling = PoissonDiscSampling.new()
var points = PoolByteArray()
var poissons = []
var truncs = []

signal new_poisson(points)
signal new_truncs(truncs)

func _ready():
	reset_options(default_width, default_height, default_spacing)

func reset_options(width, height, spacing):
	$HBoxContainer/Properties/width/width_edit.text = str(width)
	$HBoxContainer/Properties/height/height_edit.text = str(height)
	$HBoxContainer/Properties/spacing/spacing_edit.text = str(spacing)

func set_data(width, height, spacing):
	data.width = width
	data.height = height
	data.spacing = spacing

func init_points():
	points.resize(data.width * data.height)
	points.fill(0)

func _on_Button_pressed():
	set_data(
		int($HBoxContainer/Properties/width/width_edit.text),
		int($HBoxContainer/Properties/height/height_edit.text),
		int($HBoxContainer/Properties/spacing/spacing_edit.text)
	)

	init_points()

	var rect = Rect2(Vector2(0, 0), Vector2(data.width, data.height))
	poissons = poisson_disc_sampling.generate_points(data.spacing, rect, 20)

	for poisson in poissons:
		points.set(int(poisson.x) + int(poisson.y) * data.width, 1)

	emit_signal("new_poisson", points)


func _on_save_pressed():
	$SaveFileDialog.popup()

func _on_SaveFileDialog_file_selected(path):
	var file = File.new()
	file.open(path, 2)
	file.store_var(data)
	file.store_var(points)


func _on_open_pressed():
	$OpenFileDialog.popup()

func _on_OpenFileDialog_file_selected(path):
	var file = File.new()
	file.open(path, 1)
	var new_data = file.get_var()
	set_data(new_data.width, new_data.height, new_data.spacing)
	reset_options(new_data.width, new_data.height, new_data.spacing)
	points = file.get_var()
	emit_signal("new_poisson", points)


func _on_trunc_pressed():
	truncs = []
	# Création d'un polygon
	var polygon = PoolVector2Array([
		Vector2(0, 0), 
		Vector2(polygon_data.width, 0), 
		Vector2(polygon_data.width, 
		polygon_data.height), 
		Vector2(0, polygon_data.height)
	])

	# Exemple d'hexagone
	polygon = PoolVector2Array([
		Vector2(200, 0), 
		Vector2(400, 133), 
		Vector2(400, 266), 
		Vector2(200, 400),
		Vector2(0, 266),
		Vector2(0, 133),
	])



	# Spacing
	# Si sup à celui de base, le polygon doit se rétrécir proportionnellement
	# Les positions des points augmentent à la fin
	# Et inversement

	var factor = float(polygon_data.spacing) / float(data.spacing)

	for i in polygon.size():
		var vector = Vector2(polygon[i].x / factor, polygon[i].y / factor)
		polygon.set(i, vector)

	var max_point = Vector2(0, 0)
	for point in polygon:
		if point.x > max_point.x:
			max_point.x = point.x
		if point.y > max_point.y:
			max_point.y = point.y

	# Déplacement du polygon de telle sorte qu'il reste dans le carré original.
	var rng = RandomNumberGenerator.new()
	rng.randomize()
	var offset = Vector2(rng.randi_range(0, data.width - max_point.x), rng.randi_range(0, data.height - max_point.y))
	polygon = Transform2D(0, offset).xform(polygon)
	max_point += offset

	

	# On récupère les points à l'intérieur du polygon
	for i in range(offset.x, max_point.x):
		for j in range(offset.y, max_point.y):
			var trunc = Vector2(i, j)
			if Geometry.is_point_in_polygon(trunc, polygon):
				if points[i + j * data.width]:
					trunc -= offset
					trunc *= factor
					truncs.append(trunc)

	emit_signal("new_truncs", truncs)