use async_trait::async_trait;
use orsomafo::{Dispatchable, DispatchedEvent, EventHandler};
use tokio::time::{sleep, Duration};

#[tokio::main]
async fn main() {
    pretty_env_logger::init(); // For logging purpose only.

    UserCreated::subscribe::<HandleUserCreated>().await;

    let event = UserCreated { id: 1 };
    event.dispatch_event();

    // At this point we do not have any active listener
    let event = UserCreated { id: 2 };
    event.dispatch_event();

    // The following line is use to pause the application for
    // few milliseconds. This will allow us to handle all dispatched events.
    // In a full application, this line wil not be require.
    sleep(Duration::from_millis(100)).await;
}

#[derive(Clone, serde::Deserialize, serde::Serialize)]
struct UserCreated {
    id: u32,
}

impl Dispatchable for UserCreated {}

#[derive(Default)]
struct HandleUserCreated;

#[async_trait]
impl EventHandler for HandleUserCreated {
    async fn handle(&self, dispatched: DispatchedEvent) {
        println!("event id: {:?} was handled", dispatched.id());
    }

    // After this handler is called the first time,
    // it will be removed from the event listener list
    fn execute_once(&self) -> bool {
        true // By default, this is false
    }
}