extends SceneTree

# One-off bake: runs ArenaBoundary's collider generation once and commits the
# result into objects/arena_boundary.tscn, so every arena load (and every
# parallel headless training env) skips regenerating ~170 CollisionShape3D
# nodes at runtime — ArenaBoundary._ready() already skips this itself once a
# bake matching the current goal_mode exists (see bake_colliders).
#
# Safe to re-run any time a geometry constant changes (arena size, corner/
# fillet radii, goal aperture, segment counts, etc.) — bake_colliders() clears
# its own prior output first, so this replaces rather than duplicates:
#   godot --headless --path Game --script res://tools/bake_arena_boundary.gd

const ARENA_BOUNDARY_PATH := "res://objects/arena_boundary.tscn"


func _initialize() -> void:
	var packed: PackedScene = load(ARENA_BOUNDARY_PATH)
	var instance := packed.instantiate()
	instance.bake_colliders()
	# PackedScene.pack() only serializes nodes whose `owner` is set to the
	# scene root — newly created nodes have no owner by default, so without
	# this, pack() silently produces a scene with none of the just-built
	# colliders in it.
	_set_owner_recursive(instance, instance)

	var rebaked := PackedScene.new()
	var pack_result := rebaked.pack(instance)
	if pack_result != OK:
		push_error("bake_arena_boundary: pack() failed with error %d" % pack_result)
		quit(1)
		return

	var save_result := ResourceSaver.save(rebaked, ARENA_BOUNDARY_PATH)
	if save_result != OK:
		push_error("bake_arena_boundary: save() failed with error %d" % save_result)
		quit(1)
		return

	print("bake_arena_boundary: baked colliders into %s" % ARENA_BOUNDARY_PATH)
	quit()


func _set_owner_recursive(node: Node, scene_root: Node) -> void:
	for child in node.get_children():
		child.owner = scene_root
		_set_owner_recursive(child, scene_root)