extends Node2D

# Tracks which world chunks have been explored (fleet has come within
# sensor range), so the world map can reveal only chunks actually visited
# instead of the whole procedurally generated world at once. Writes
# directly into GameState.explored_chunks (not a local dict) so this
# history survives the Main.tscn <-> PlanetSurface.tscn scene swap, which
# tears down and recreates this node from scratch each time.

@export var sensor_radius_chunks: int = 1

@onready var fleet: Node2D = get_node("../Fleet")


func _process(_delta: float) -> void:
	var center_chunk: Vector2i = WorldGen.chunk_coords(fleet.get_centroid())
	for dx in range(-sensor_radius_chunks, sensor_radius_chunks + 1):
		for dy in range(-sensor_radius_chunks, sensor_radius_chunks + 1):
			GameState.explored_chunks[center_chunk + Vector2i(dx, dy)] = true


func get_explored_chunks() -> Array:
	return GameState.explored_chunks.keys()