use satrs::pool::{PoolAddr, PoolGuard, PoolProvider, StaticMemoryPool, StaticPoolConfig};
use std::ops::DerefMut;
use std::sync::mpsc;
use std::sync::mpsc::{Receiver, Sender};
use std::sync::{Arc, RwLock};
use std::thread;

const DUMMY_DATA: [u8; 4] = [0, 1, 2, 3];

#[test]
fn threaded_usage() {
    let pool_cfg = StaticPoolConfig::new(vec![(16, 6), (32, 3), (8, 12)], false);
    let shared_pool = Arc::new(RwLock::new(StaticMemoryPool::new(pool_cfg)));
    let shared_clone = shared_pool.clone();
    let (tx, rx): (Sender<PoolAddr>, Receiver<PoolAddr>) = mpsc::channel();
    let jh0 = thread::spawn(move || {
        let mut dummy = shared_pool.write().unwrap();
        let addr = dummy.add(&DUMMY_DATA).expect("Writing data failed");
        tx.send(addr).expect("Sending store address failed");
    });

    let jh1 = thread::spawn(move || {
        let addr;
        {
            addr = rx.recv().expect("Receiving store address failed");
            let mut pool_access = shared_clone.write().unwrap();
            let pg = PoolGuard::new(pool_access.deref_mut(), addr);
            let mut read_buf: [u8; 4] = [0; 4];
            let read_bytes = pg.read(&mut read_buf).expect("Reading failed");
            assert_eq!(read_buf, DUMMY_DATA);
            assert_eq!(read_bytes, 4);
        }
        let pool_access = shared_clone.read().unwrap();
        assert!(!pool_access.has_element_at(&addr).expect("Invalid address"));
    });
    jh0.join().unwrap();
    jh1.join().unwrap();
}