use std::marker::PhantomData;

use crate::Game;

/// Struct passed to your plugin's `enable()` function.

///

/// Allows you to register systems, etc.

pub struct Setup<Plugin> {

_marker: PhantomData<Plugin>,

}

impl<Plugin> Setup<Plugin> {

/// For Quill internal use only. Do not call.

#[doc(hidden)]

#[allow(clippy::new_without_default)]

pub fn new() -> Self {

Self {

_marker: PhantomData,

}

}

/// Registers a function as system to be invoked

/// every tick.

///

/// The function should take as parameters your

/// plugin instance and an `&mut Game` and return nothing.

pub fn add_system<T: FnMut(&mut Plugin, &mut Game)>(&mut self, system: T) -> &mut Self {

let system: Box<dyn FnMut(&mut Plugin, &mut Game)> = Box::new(system);

let system_data = Box::leak(Box::new(system)) as *mut Box<_> as *mut u8;

let name = std::any::type_name::<T>();

unsafe {

quill_sys::register_system(system_data.into(), name.as_ptr().into(), name.len() as u32);

}

self

}

}