use std::{cell::RefCell, mem::MaybeUninit};
use wasm_bindgen_macro::wasm_bindgen;

use fish::Weights;

#[global_allocator]
static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;

struct State {
    weights: Weights,
    max_iters: u32,
}

static mut STATE: MaybeUninit<RefCell<State>> = MaybeUninit::uninit();

fn state() -> &'static RefCell<State> {
    unsafe { STATE.assume_init_ref() }
}

#[wasm_bindgen(start)]
fn start() {
    let init_state = State {
        weights: Weights::default(),
        max_iters: 10_000,
    };

    unsafe { STATE.write(RefCell::new(init_state)) };
}

#[wasm_bindgen]
pub fn get_version() -> String {
    "0.0.x".to_owned()
}

#[wasm_bindgen]
pub fn get_config() -> Vec<i32> {
    let state = state().borrow();
    let mut config = Vec::from(state.weights.0);
    config.push(state.max_iters as i32);
    config
}