use ::specs::prelude::*;

use super::UnifiedDispatcher;

macro_rules! construct_dispatcher {
    (
        $(
            (
                $type:ident,
                $name:expr,
                $deps:expr
            )
        ),*
    ) => {
        fn new_dispatch() -> Box<dyn UnifiedDispatcher + 'static> {
            let mut dispatch = SingleThreadedDispatcher {
                systems: Vec::new()
            };

            $(
                dispatch.systems.push(Box::new( $type {} ));
            )*

            return Box::new(dispatch);
        }
    }
}

pub struct SingleThreadedDispatcher<'a> {
    pub systems: Vec<Box<dyn RunNow<'a>>>,
}

impl<'a> UnifiedDispatcher for SingleThreadedDispatcher<'a> {
    fn run_now(&mut self, ecs: *mut World) {
        unsafe {
            for sys in self.systems.iter_mut() {
                sys.run_now(&*ecs);
            }
            crate::effects::run_effects_queue(&mut *ecs);
        }
    }
}