//! Tests for tuple dependencies (2-8 dependencies)

use dagx::{DagResult, DagRunner};
use dagx_test::task_fn;

#[tokio::test]
async fn test_two_dependencies() -> DagResult<()> {
    let mut dag = DagRunner::new();

    let a = dag.add_task(task_fn::<(), _, _>(|_: ()| 10));
    let b = dag.add_task(task_fn::<(), _, _>(|_: ()| 20));
    let sum = dag
        .add_task(task_fn::<(i32, i32), _, _>(|(x, y): (&i32, &i32)| x + y))
        .depends_on((&a, &b));

    let mut output = dag
        .run(|fut| async move { tokio::spawn(fut).await.unwrap() })
        .await?;

    assert_eq!(output.get(sum), 30);
    Ok(())
}

#[tokio::test]
async fn test_three_dependencies() -> DagResult<()> {
    let mut dag = DagRunner::new();

    let a = dag.add_task(task_fn::<(), _, _>(|_: ()| 1));
    let b = dag.add_task(task_fn::<(), _, _>(|_: ()| 2));
    let c = dag.add_task(task_fn::<(), _, _>(|_: ()| 3));
    let sum = dag
        .add_task(task_fn::<(i32, i32, i32), _, _>(
            |(x, y, z): (&i32, &i32, &i32)| x + y + z,
        ))
        .depends_on((&a, &b, &c));

    let mut output = dag
        .run(|fut| async move { tokio::spawn(fut).await.unwrap() })
        .await?;

    assert_eq!(output.get(sum), 6);
    Ok(())
}

#[tokio::test]
async fn test_four_dependencies() -> DagResult<()> {
    let mut dag = DagRunner::new();

    let deps: Vec<_> = (1..=4)
        .map(|i| dag.add_task(task_fn::<(), _, _>(move |_: ()| i)))
        .collect();

    let sum = dag
        .add_task(task_fn::<(i32, i32, i32, i32), _, _>(
            |(a, b, c, d): (&i32, &i32, &i32, &i32)| a + b + c + d,
        ))
        .depends_on((&deps[0], &deps[1], &deps[2], &deps[3]));

    let mut output = dag
        .run(|fut| async move { tokio::spawn(fut).await.unwrap() })
        .await?;

    assert_eq!(output.get(sum), 10); // 1+2+3+4
    Ok(())
}

#[tokio::test]
async fn test_five_dependencies() -> DagResult<()> {
    let mut dag = DagRunner::new();

    let deps: Vec<_> = (1..=5)
        .map(|i| dag.add_task(task_fn::<(), _, _>(move |_: ()| i)))
        .collect();

    let sum = dag
        .add_task(task_fn::<(i32, i32, i32, i32, i32), _, _>(
            |(a, b, c, d, e): (&i32, &i32, &i32, &i32, &i32)| a + b + c + d + e,
        ))
        .depends_on((&deps[0], &deps[1], &deps[2], &deps[3], &deps[4]));

    let mut output = dag
        .run(|fut| async move { tokio::spawn(fut).await.unwrap() })
        .await?;

    assert_eq!(output.get(sum), 15); // 1+2+3+4+5
    Ok(())
}

#[tokio::test]
async fn test_six_dependencies() -> DagResult<()> {
    let mut dag = DagRunner::new();

    let deps: Vec<_> = (1..=6)
        .map(|i| dag.add_task(task_fn::<(), _, _>(move |_: ()| i)))
        .collect();

    let sum = dag
        .add_task(task_fn::<(i32, i32, i32, i32, i32, i32), _, _>(
            |(a, b, c, d, e, f): (&i32, &i32, &i32, &i32, &i32, &i32)| a + b + c + d + e + f,
        ))
        .depends_on((&deps[0], &deps[1], &deps[2], &deps[3], &deps[4], &deps[5]));

    let mut output = dag
        .run(|fut| async move { tokio::spawn(fut).await.unwrap() })
        .await?;

    assert_eq!(output.get(sum), 21); // 1+2+3+4+5+6
    Ok(())
}

#[tokio::test]
async fn test_seven_dependencies() -> DagResult<()> {
    let mut dag = DagRunner::new();

    let deps: Vec<_> = (1..=7)
        .map(|i| dag.add_task(task_fn::<(), _, _>(move |_: ()| i)))
        .collect();

    let sum = dag
        .add_task(task_fn::<(i32, i32, i32, i32, i32, i32, i32), _, _>(
            |(a, b, c, d, e, f, g): (&i32, &i32, &i32, &i32, &i32, &i32, &i32)| {
                a + b + c + d + e + f + g
            },
        ))
        .depends_on((
            &deps[0], &deps[1], &deps[2], &deps[3], &deps[4], &deps[5], &deps[6],
        ));

    let mut output = dag
        .run(|fut| async move { tokio::spawn(fut).await.unwrap() })
        .await?;

    assert_eq!(output.get(sum), 28); // 1+2+3+4+5+6+7
    Ok(())
}

#[tokio::test]
async fn test_eight_dependencies() -> DagResult<()> {
    let mut dag = DagRunner::new();

    let deps: Vec<_> = (1..=8)
        .map(|i| dag.add_task(task_fn::<(), _, _>(move |_: ()| i)))
        .collect();

    let sum = dag
        .add_task(task_fn::<(i32, i32, i32, i32, i32, i32, i32, i32), _, _>(
            |(a, b, c, d, e, f, g, h): (&i32, &i32, &i32, &i32, &i32, &i32, &i32, &i32)| {
                a + b + c + d + e + f + g + h
            },
        ))
        .depends_on((
            &deps[0], &deps[1], &deps[2], &deps[3], &deps[4], &deps[5], &deps[6], &deps[7],
        ));

    let mut output = dag
        .run(|fut| async move { tokio::spawn(fut).await.unwrap() })
        .await?;

    assert_eq!(output.get(sum), 36); // Sum of 1..=8
    Ok(())
}