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

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

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

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

    // Send the request

    let response = super::handler(
        State(app.clone()),
        Path(message.id.clone()),
        fixtures::now(),
        sender,
    )
    .await
    .expect("deleting a valid message succeeds");

    // Verify the response

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

    // Verify the semantics

    let snapshot = app.boot().snapshot().await.expect("boot always succeeds");
    let deleted = snapshot
        .events
        .into_iter()
        .filter_map(fixtures::event::message)
        .filter_map(fixtures::event::message::deleted)
        .exactly_one()
        .expect("only one message has been deleted");
    assert_eq!(response.id, deleted.id)
}

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

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

    // Send the request

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

    // Verify the response

    assert!(matches!(error, app::DeleteError::MessageNotFound(id) if id == message));
}

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

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

    app.messages()
        .delete(&sender, &message.id, &fixtures::now())
        .await
        .expect("deleting a recently-sent message succeeds");

    // Send the request

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

    // Verify the response

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

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

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

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

    // Send the request

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

    // Verify the response

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

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

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

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

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

    // Send the request

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

    // Verify the response

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

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

    let app = fixtures::scratch_app().await;
    let sender = fixtures::user::create(&app, &fixtures::now()).await;
    let conversation = fixtures::conversation::create(&app, &fixtures::now()).await;
    let message = 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.clone()),
        Path(message.id.clone()),
        fixtures::now(),
        deleter.clone(),
    )
    .await
    .expect_err("deleting a message someone else sent fails");

    // Verify the response

    assert!(
        matches!(error, app::DeleteError::NotSender(error_sender) if deleter.login.id == error_sender)
    );
}