use enum_dispatch::enum_dispatch;

use crate::{
    scaler::{Pos, Velo},
    system::EntityContainer,
};

/// 一个实体的能力
#[enum_dispatch]
pub trait Ability {
    fn tick(&mut self, sys: &EntityContainer) -> Self;
}

/// 各种能力
/// 所有的能力的枚举，用以静态分发
#[enum_dispatch(Ability)]
#[derive(Clone, Copy)]
pub enum Abilities {
    Movement,
}

/// 移动能力
#[derive(Clone, Copy)]
pub struct Movement(pub Pos, pub Velo);
impl Ability for Movement {
    fn tick(&mut self, _sys: &EntityContainer) -> Self {
        self.0 = self.0 + self.1;
        *self
    }
}

/// 碰撞能力
#[derive(Clone, Copy)]
pub struct Vertical
(pub Pos, pub Velo);