use axum::extract::{Path, State};
use itertools::Itertools;

use crate::{conversation::app, test::fixtures};

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

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

    // Send the request

    let deleter = fixtures::identity::create(&app, &fixtures::now()).await;
    let response = super::handler(
        State(app.conversations()),
        Path(conversation.id.clone()),
        fixtures::now(),
        deleter,
    )
    .await
    .expect("deleting a valid conversation succeeds");

    // Verify the response

    assert_eq!(conversation.id, response.id);

    // Verify the semantics

    let snapshot = app.boot().snapshot().await.expect("boot always succeeds");
    let created = snapshot
        .events
        .into_iter()
        .filter_map(fixtures::event::conversation)
        .filter_map(fixtures::event::conversation::created)
        .exactly_one()
        .expect("only one conversation has been created");
    // We don't expect `conversation` to match the event exactly, as the name will have
    // been tombstoned and the conversation given a `deleted_at` date.
    assert_eq!(conversation.id, created.conversation.id);
}

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

    let app = fixtures::scratch_app().await;

    // Send the request

    let deleter = fixtures::identity::create(&app, &fixtures::now()).await;
    let conversation = fixtures::conversation::fictitious();
    let super::Error(error) = super::handler(
        State(app.conversations()),
        Path(conversation.clone()),
        fixtures::now(),
        deleter,
    )
    .await
    .expect_err("deleting a nonexistent conversation fails");

    // Verify the response

    assert!(matches!(error, app::DeleteError::NotFound(id) if id == conversation));
}

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

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

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

    // Send the request

    let deleter = fixtures::identity::create(&app, &fixtures::now()).await;
    let super::Error(error) = super::handler(
        State(app.conversations()),
        Path(conversation.id.clone()),
        fixtures::now(),
        deleter,
    )
    .await
    .expect_err("deleting a deleted conversation fails");

    // Verify the response

    assert!(matches!(error, app::DeleteError::Deleted(id) if id == conversation.id));
}

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

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

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

    // Send the request

    let deleter = fixtures::identity::create(&app, &fixtures::now()).await;
    let super::Error(error) = super::handler(
        State(app.conversations()),
        Path(conversation.id.clone()),
        fixtures::now(),
        deleter,
    )
    .await
    .expect_err("deleting an expired conversation fails");

    // Verify the response

    assert!(matches!(error, app::DeleteError::Deleted(id) if id == conversation.id));
}

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

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

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

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

    // Send the request

    let deleter = fixtures::identity::create(&app, &fixtures::now()).await;
    let super::Error(error) = super::handler(
        State(app.conversations()),
        Path(conversation.id.clone()),
        fixtures::now(),
        deleter,
    )
    .await
    .expect_err("deleting a purged conversation fails");

    // Verify the response

    assert!(matches!(error, app::DeleteError::NotFound(id) if id == conversation.id));
}

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

    let app = fixtures::scratch_app().await;
    let conversation = fixtures::conversation::create(&app, &fixtures::now()).await;
    let sender = fixtures::user::create(&app, &fixtures::now()).await;
    fixtures::message::send(&app, &conversation, &sender, &fixtures::now()).await;

    // Send the request

    let deleter = fixtures::identity::create(&app, &fixtures::now()).await;
    let super::Error(error) = super::handler(
        State(app.conversations()),
        Path(conversation.id.clone()),
        fixtures::now(),
        deleter,
    )
    .await
    .expect_err("deleting a conversation with messages fails");

    // Verify the response

    assert!(matches!(error, app::DeleteError::NotEmpty(id) if id == conversation.id));
}