package blitz.math

import blitz.unreachable

/** only 6 directions -> only needs 3 bits */
@JvmInline
value class Direction(
    val idx: U3
) {
    companion object {
        val UP = Direction(U3(0u))
        val DOWN = Direction(U3(1u))
        val NORTH = Direction(U3(2u))
        val EAST = Direction(U3(3u))
        val SOUTH = Direction(U3(4u))
        val WEST = Direction(U3(5u))
    }

    override fun toString() =
        when (this) {
            UP -> "Up"
            DOWN -> "Down"
            NORTH -> "North"
            EAST -> "East"
            SOUTH -> "South"
            WEST -> "West"
            else -> unreachable()
        }
}