import { lightMinuteToLightYear } from "@thorium/utils/unitTypes";

export function getNavigationDistance(
	object: { x: number; y: number; z: number },
	shipPosition: { x: number; y: number; z: number } | null,
	objectSystem: { x: number; y: number; z: number; id: number } | null,
	shipSystem: { x: number; y: number; z: number; id: number } | null,
) {
	if (!shipPosition) return null;
	let distance = 0;
	// Interstellar distances OR they are in the same system
	if (objectSystem?.id === shipSystem?.id) {
		distance = Math.hypot(
			object.x - shipPosition.x,
			object.y - shipPosition.y,
			object.z - shipPosition.z,
		);
		if (objectSystem?.id) {
			// Inside a solar system
			return { distance, unit: "KM" };
		}
	}
	// The ship is in interstellar space, calculate the distance from the ship to the object's system.
	if (!shipSystem && objectSystem) {
		distance = Math.hypot(
			shipPosition.x - objectSystem.x,
			shipPosition.y - objectSystem.y,
			shipPosition.z - objectSystem.z,
		);
	}
	// The ship is in a system and the object is in interstellar space.
	if (shipSystem && !objectSystem) {
		distance = Math.hypot(
			object.x - shipSystem.x,
			object.y - shipSystem.y,
			object.z - shipSystem.z,
		);
	}
	// The ship and object are in different systems.
	if (objectSystem && shipSystem && objectSystem.id !== shipSystem.id) {
		distance = Math.hypot(
			objectSystem.x - shipSystem.x,
			objectSystem.y - shipSystem.y,
			objectSystem.z - shipSystem.z,
		);
	}
	return { distance: lightMinuteToLightYear(distance), unit: "LY" };
}