use std::error::Error;

use async_trait::async_trait;
use twilight_model::user::User;

use crate::framework::runtime::Runtime;

#[async_trait]
pub trait ExtrasGetter<S>: Send + Sync {
    type Extras;

    async fn get_extra(
        &self,
        user: &User,
        rt: &Runtime<S, Self::Extras>,
    ) -> Result<Self::Extras, Box<dyn Error>>;
}

pub struct DefaultExtraGetter;

#[async_trait]
impl<S> ExtrasGetter<S> for DefaultExtraGetter {
    type Extras = ();

    async fn get_extra(
        &self,
        _user: &User,
        _rt: &Runtime<S, Self::Extras>,
    ) -> Result<Self::Extras, Box<dyn Error>> {
        Ok(())
    }
}