class_name SitePlacement
extends Resource

enum Kind {
	WRECK_TARGET,
	WRECK_DECOY,
	SECONDARY_ITEM,
	DEBRIS,
	LANDMARK,
	VESSEL_ANCHOR,
}

@export var placement_id: StringName
@export var kind: Kind = Kind.LANDMARK
@export var position_m: Vector3 = Vector3.ZERO
@export var yaw_radians: float = 0.0
@export var footprint_m: Vector3 = Vector3.ZERO


func is_sonar_metal() -> bool:
	return kind in [Kind.WRECK_TARGET, Kind.WRECK_DECOY, Kind.SECONDARY_ITEM, Kind.DEBRIS]


func validation_error() -> String:
	if placement_id.is_empty():
		return "placement id is empty"
	if not (is_finite(position_m.x) and is_finite(position_m.y) and is_finite(position_m.z)):
		return "placement position must be finite"
	if not is_finite(yaw_radians):
		return "placement yaw must be finite"
	if footprint_m.x < 0.0 or footprint_m.y < 0.0 or footprint_m.z < 0.0:
		return "placement footprint must not be negative"
	if is_sonar_metal() and footprint_m.length_squared() == 0.0:
		return "sonar bodies need a footprint"
	return ""