use std::{convert::Infallible, time::Duration};

use async_trait::async_trait;
use cucumber::{given, then, when, WorldInit};
use tokio::time::sleep;

#[derive(Debug, WorldInit)]
struct World {
    user: Option<String>,
    capacity: usize,
}

#[async_trait(?Send)]
impl cucumber::World for World {
    type Error = Infallible;

    async fn new() -> Result<Self, Self::Error> {
        Ok(Self { user: None, capacity: 0 })
    }
}

#[given(expr = "{word} is hungry")] // Cucumber Expression
async fn someone_is_hungry(w: &mut World, user: String) {
    sleep(Duration::from_secs(2)).await;
    
    w.user = Some(user);
}

#[when(regex = r"^(?:he|she|they) eats? (\d+) cucumbers?$")]
async fn eat_cucumbers(w: &mut World, count: usize) {
    sleep(Duration::from_secs(2)).await;

    w.capacity += count;
    
    assert!(w.capacity < 4, "{} exploded!", w.user.as_ref().unwrap());
}

#[then("she is full")]
async fn is_full(w: &mut World) {
    sleep(Duration::from_secs(2)).await;

    assert_eq!(w.capacity, 3, "{} isn't full!", w.user.as_ref().unwrap());
}

#[tokio::main]
async fn main() {
    World::run("tests/features/readme").await;
}