extends Node2D

# A landable world-object - unlike regular Asteroid.gd, planets are
# stationary ("Big Stable Asteroid" - stable means it doesn't drift or
# destroy ships on touch). Whether the fleet counts as "landed" is decided
# by PlanetField comparing the fleet's CENTROID distance to landing_radius,
# not per-ship Area2D collision - a single stable number, immune to the
# constant minor jostling of individual ships holding formation, which
# used to make the "enter atmosphere" prompt flicker on/off as ships
# drifted in and out of the boundary independently of each other even
# while the fleet as a whole was clearly sitting on the planet.

@export var planet_name: String = ""
@export var planet_type: String = "big_stable_asteroid"
@export var landing_radius: float = 140.0
# Set by whoever spawns this planet (PlanetField, seeded from the chunk's
# own coordinates) so the outline shape is stable across respawns of the
# same chunk, instead of reading as a "different" planet every time.
@export var shape_seed: int = 0

var shape_points: PackedVector2Array = PackedVector2Array()


func _ready() -> void:
	add_to_group("planets")
	z_index = -1

	var rng: RandomNumberGenerator = RandomNumberGenerator.new()
	rng.seed = shape_seed
	var point_count: int = 10
	for i in range(point_count):
		var angle: float = (float(i) / point_count) * TAU
		var radius: float = rng.randf_range(70.0, 100.0)
		shape_points.append(Vector2(cos(angle), sin(angle)) * radius)
	queue_redraw()


func _draw() -> void:
	NeonDraw.draw_glowing_polygon(self, shape_points, Color(0.6, 0.55, 0.5), 1.0)