use num_traits::{One, Signed, Zero};
use parity_scale_codec::{Decode, Encode};

pub type Position = (i32, i32);

#[derive(Debug, Default)]
pub struct Board {
	pub origin: (i32, i32),
	pub size: (i32, i32),
}

pub trait HasPosition {
	fn get_position(&self) -> (i32, i32);
}

#[derive(Clone, Copy, Debug, Decode, Encode, Eq, PartialEq, Hash)]
pub enum Direction {
	East,
	North,
	South,
	West,
}

impl Direction {
	pub fn to_position<T: One + Signed + Zero>(&self) -> (T, T) {
		match self {
			Self::East => (T::one(), T::zero()),
			Self::North => (T::zero(), T::one().neg()),
			Self::South => (T::zero(), T::one()),
			Self::West => (T::one().neg(), T::zero()),
		}
	}
}

impl sp_runtime_interface::pass_by::PassBy for Direction {
	type PassBy = sp_runtime_interface::pass_by::Codec<Self>;
}