use axum::extract::State;
use axum_extra::extract::Query;
use futures::{future, stream::StreamExt as _};

use crate::test::fixtures::{self, future::Expect as _};

#[tokio::test]
async fn creating() {
    // Set up the environment

    let app = fixtures::scratch_app().await;
    let resume_point = fixtures::boot::resume_point(&app).await;

    // Subscribe

    let subscriber = fixtures::identity::create(&app, &fixtures::now()).await;
    let super::Response(events) = super::handler(
        State(app.clone()),
        subscriber,
        None,
        Query(super::QueryParams { resume_point }),
    )
    .await
    .expect("subscribe never fails");

    // Create a conversation

    let name = fixtures::conversation::propose();
    let conversation = app
        .conversations()
        .create(&name, &fixtures::now())
        .await
        .expect("creating a conversation succeeds");

    // Verify conversation created event

    events
        .filter_map(fixtures::event::stream::conversation)
        .filter_map(fixtures::event::stream::conversation::created)
        .filter(|event| future::ready(event.conversation == conversation))
        .next()
        .expect_some("conversation created event is delivered")
        .await;
}

#[tokio::test]
async fn previously_created() {
    // Set up the environment

    let app = fixtures::scratch_app().await;
    let resume_point = fixtures::boot::resume_point(&app).await;

    // Create a conversation

    let name = fixtures::conversation::propose();
    let conversation = app
        .conversations()
        .create(&name, &fixtures::now())
        .await
        .expect("creating a conversation succeeds");

    // Subscribe

    let subscriber = fixtures::identity::create(&app, &fixtures::now()).await;
    let super::Response(events) = super::handler(
        State(app.clone()),
        subscriber,
        None,
        Query(super::QueryParams { resume_point }),
    )
    .await
    .expect("subscribe never fails");

    // Verify conversation created event

    let _ = events
        .filter_map(fixtures::event::stream::conversation)
        .filter_map(fixtures::event::stream::conversation::created)
        .filter(|event| future::ready(event.conversation == conversation))
        .next()
        .expect_some("conversation created event is delivered")
        .await;
}

#[tokio::test]
async fn expiring() {
    // Set up the environment

    let app = fixtures::scratch_app().await;
    let conversation = fixtures::conversation::create(&app, &fixtures::ancient()).await;
    let resume_point = fixtures::boot::resume_point(&app).await;

    // Subscribe

    let subscriber = fixtures::identity::create(&app, &fixtures::now()).await;
    let super::Response(events) = super::handler(
        State(app.clone()),
        subscriber,
        None,
        Query(super::QueryParams { resume_point }),
    )
    .await
    .expect("subscribe never fails");

    // Expire conversations

    app.conversations()
        .expire(&fixtures::now())
        .await
        .expect("expiring conversations always succeeds");

    // Check for expiry event
    let _ = events
        .filter_map(fixtures::event::stream::conversation)
        .filter_map(fixtures::event::stream::conversation::deleted)
        .filter(|event| future::ready(event.id == conversation.id))
        .next()
        .expect_some("a deleted conversation event will be delivered")
        .await;
}

#[tokio::test]
async fn previously_expired() {
    // Set up the environment

    let app = fixtures::scratch_app().await;
    let conversation = fixtures::conversation::create(&app, &fixtures::ancient()).await;
    let resume_point = fixtures::boot::resume_point(&app).await;

    // Expire conversations

    app.conversations()
        .expire(&fixtures::now())
        .await
        .expect("expiring conversation always succeeds");

    // Subscribe

    let subscriber = fixtures::identity::create(&app, &fixtures::now()).await;
    let super::Response(events) = super::handler(
        State(app.clone()),
        subscriber,
        None,
        Query(super::QueryParams { resume_point }),
    )
    .await
    .expect("subscribe never fails");

    // Check for expiry event
    let _ = events
        .filter_map(fixtures::event::stream::conversation)
        .filter_map(fixtures::event::stream::conversation::deleted)
        .filter(|event| future::ready(event.id == conversation.id))
        .next()
        .expect_some("a deleted conversation event will be delivered")
        .await;
}

#[tokio::test]
async fn deleting() {
    // Set up the environment

    let app = fixtures::scratch_app().await;
    let conversation = fixtures::conversation::create(&app, &fixtures::now()).await;
    let resume_point = fixtures::boot::resume_point(&app).await;

    // Subscribe

    let subscriber = fixtures::identity::create(&app, &fixtures::now()).await;
    let super::Response(events) = super::handler(
        State(app.clone()),
        subscriber,
        None,
        Query(super::QueryParams { resume_point }),
    )
    .await
    .expect("subscribe never fails");

    // Delete the conversation

    app.conversations()
        .delete(&conversation.id, &fixtures::now())
        .await
        .expect("deleting a valid conversation succeeds");

    // Check for delete event
    let _ = events
        .filter_map(fixtures::event::stream::conversation)
        .filter_map(fixtures::event::stream::conversation::deleted)
        .filter(|event| future::ready(event.id == conversation.id))
        .next()
        .expect_some("a deleted conversation event will be delivered")
        .await;
}

#[tokio::test]
async fn previously_deleted() {
    // Set up the environment

    let app = fixtures::scratch_app().await;
    let conversation = fixtures::conversation::create(&app, &fixtures::now()).await;
    let resume_point = fixtures::boot::resume_point(&app).await;

    // Delete the conversation

    app.conversations()
        .delete(&conversation.id, &fixtures::now())
        .await
        .expect("deleting a valid conversation succeeds");

    // Subscribe

    let subscriber = fixtures::identity::create(&app, &fixtures::now()).await;
    let super::Response(events) = super::handler(
        State(app.clone()),
        subscriber,
        None,
        Query(super::QueryParams { resume_point }),
    )
    .await
    .expect("subscribe never fails");

    // Check for expiry event
    let _ = events
        .filter_map(fixtures::event::stream::conversation)
        .filter_map(fixtures::event::stream::conversation::deleted)
        .filter(|event| future::ready(event.id == conversation.id))
        .next()
        .expect_some("a deleted conversation event will be delivered")
        .await;
}

#[tokio::test]
async fn previously_purged() {
    // Set up the environment

    let app = fixtures::scratch_app().await;
    let conversation = fixtures::conversation::create(&app, &fixtures::ancient()).await;
    let resume_point = fixtures::boot::resume_point(&app).await;

    // Delete and purge the conversation

    app.conversations()
        .delete(&conversation.id, &fixtures::ancient())
        .await
        .expect("deleting a valid conversation succeeds");

    app.conversations()
        .purge(&fixtures::now())
        .await
        .expect("purging conversations always succeeds");

    // Subscribe

    let subscriber = fixtures::identity::create(&app, &fixtures::now()).await;
    let super::Response(events) = super::handler(
        State(app.clone()),
        subscriber,
        None,
        Query(super::QueryParams { resume_point }),
    )
    .await
    .expect("subscribe never fails");

    // Check for expiry event
    events
        .filter_map(fixtures::event::stream::conversation)
        .filter_map(fixtures::event::stream::conversation::deleted)
        .filter(|event| future::ready(event.id == conversation.id))
        .next()
        .expect_wait("deleted conversation events not delivered")
        .await;
}