use axum::extract::{Json, State};

use crate::{
    channel::{app, routes},
    test::fixtures,
};

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

    let app = fixtures::scratch_app().await;
    let creator = fixtures::login::create(&app).await;

    // Call the endpoint

    let name = fixtures::channel::propose();
    let request = routes::CreateRequest { name };
    let Json(response_channel) =
        routes::on_create(State(app.clone()), creator, Json(request.clone()))
            .await
            .expect("new channel in an empty app");

    // Verify the structure of the response

    assert_eq!(request.name, response_channel.name);

    // Verify the semantics

    let channels = app.channels().all().await.expect("always succeeds");

    assert!(channels.contains(&response_channel));
}

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

    let app = fixtures::scratch_app().await;
    let creator = fixtures::login::create(&app).await;
    let channel = fixtures::channel::create(&app).await;

    // Call the endpoint

    let request = routes::CreateRequest { name: channel.name };
    let routes::CreateError(error) =
        routes::on_create(State(app.clone()), creator, Json(request.clone()))
            .await
            .expect_err("duplicate channel name");

    // Verify the structure of the response

    assert!(matches!(
        error,
        app::CreateError::DuplicateName(name) if request.name == name
    ));
}