extends Node2D


export var color: Color
export var width: float = 1.5
export var segments: int
export var segment_length: float
export var angle_min: float
export var angle_max: float
export var branch_chance: float
export var fade_time: float


func _ready() -> void:
	var tween = create_tween()
	tween.tween_property(self, "modulate:a", 0.0, fade_time).set_trans(Tween.TRANS_EXPO)
	tween.tween_callback(self, "queue_free")


func _draw() -> void:
	var pos := Vector2.ZERO
	var dir := Vector2.DOWN * segment_length
	var offset = randi() % 2
	for i in range(offset, segments + offset):
		var angle = rand_range(angle_min, angle_max)
		if i % 2 == 0:
			angle *= -1.0
		dir = dir.rotated(deg2rad(angle))
		var new_pos = pos + dir
		draw_line(pos, new_pos, color, width, false)
		if randf() <= branch_chance:
			dir = dir.rotated(deg2rad(angle) * -2.0)
			draw_line(pos, pos + dir, color, width, false)
		pos = new_pos