use axum::Router;
use axum::extract::{Path, State};
use axum::http::StatusCode;
use axum::routing::{delete, get, put};
use axum_msgpack::MsgPack;

use super::models::{Place, PlaceUpsert};
use super::repository::{PlacesError, PlacesRepository};

type Result<T, E = (StatusCode, String)> = std::result::Result<T, E>;

fn internal_error(err: PlacesError) -> (StatusCode, String) {
    match err {
        PlacesError::FailToGet(_) | PlacesError::FailToUpsert(_) | PlacesError::FailToDelete(_) => {
            (StatusCode::INTERNAL_SERVER_ERROR, err.to_string())
        }
        PlacesError::NotFound(_) => (StatusCode::NOT_FOUND, err.to_string()),
    }
}

async fn get_places<PR: PlacesRepository>(
    State(repository): State<PR>,
) -> Result<MsgPack<Vec<Place>>> {
    let places = repository.get_places().await.map_err(internal_error)?;
    Ok(MsgPack(places))
}

async fn upsert_place<PR: PlacesRepository>(
    State(repository): State<PR>,
    MsgPack(place): MsgPack<PlaceUpsert>,
) -> Result<MsgPack<Place>> {
    let place = match place.into() {
        (place, Some(id)) => repository.update_place((place, id).into()).await,
        (place, None) => repository.insert_place(place).await,
    }
    .map_err(internal_error)?;
    Ok(MsgPack(place))
}

async fn delete_place<PR: PlacesRepository>(
    State(repository): State<PR>,
    Path(id): Path<i64>,
) -> Result<()> {
    repository.delete_place(id).await.map_err(internal_error)?;
    Ok(())
}

pub fn places_routes<PR: PlacesRepository>(repository: PR) -> Router {
    Router::new()
        .route("/", get(get_places::<PR>))
        .route("/", put(upsert_place::<PR>))
        .route("/{id}", delete(delete_place::<PR>))
        .with_state(repository)
}

mod tests {
    #![cfg(test)]
    use super::places_routes;
    use crate::places::models::{Place, PlaceUpsert};
    use crate::places::repository::MockPlacesRepository;

    use anyhow::Result;
    use axum::Router;
    use axum::http::StatusCode;
    use axum_test::TestServer;

    fn setup_server() -> Result<(TestServer, MockPlacesRepository)> {
        let places_repository = MockPlacesRepository::new();
        let router = Router::new().nest("/places", places_routes(places_repository.clone()));
        Ok((TestServer::new(router)?, places_repository))
    }

    #[tokio::test]
    async fn test_add_place() -> Result<()> {
        let (server, mock_repository) = setup_server()?;
        let place = PlaceUpsert {
            id: None,
            name: "Sherlock Holmes".to_owned(),
            address: "221 B Baker Street, London".to_owned(),
            description: "Museum and Gift Shop".to_owned(),
            icon: "museum".to_owned(),
            latitude: 51.5237669,
            longitude: -0.1627829,
            open_hours: "Tu-Su 09:30-18:00".to_owned(),
            url: Some("https://www.sherlock-holmes.co.uk/".to_owned()),
        };
        // Insert the place
        let res = server.put("/places").msgpack(&place).await;
        // We should get a success on the request
        assert_eq!(res.status_code(), StatusCode::OK);
        let _res_place: Place = res.msgpack();
        // The correct function should be called
        assert_eq!(mock_repository.insert_place_count().await, 1);
        Ok(())
    }

    #[tokio::test]
    async fn test_get_places() -> Result<()> {
        let (server, mock_repository) = setup_server()?;
        // Get the places
        let res = server.get("/places").await;
        // We should get a success on the request
        assert_eq!(res.status_code(), StatusCode::OK);
        let _res_places: Vec<Place> = res.msgpack();
        // and the correct function should be called
        assert_eq!(mock_repository.get_places_count().await, 1);
        Ok(())
    }

    #[tokio::test]
    async fn test_delete() -> Result<()> {
        let (server, mock_repository) = setup_server()?;
        // Call delete
        let res = server.delete("/places/0").await;
        // We should get a success on the request
        assert_eq!(res.status_code(), StatusCode::OK);
        // The correct function should be called
        assert_eq!(mock_repository.delete_place_count().await, 1);
        Ok(())
    }

    #[tokio::test]
    async fn test_update() -> Result<()> {
        let (server, mock_repository) = setup_server()?;
        let places = PlaceUpsert {
            id: Some(1),
            name: "Sherlock Holmes".to_owned(),
            address: "221 B Baker Street, London".to_owned(),
            description: "Museum and Gift Shop".to_owned(),
            icon: "museum".to_owned(),
            latitude: 51.5237669,
            longitude: -0.1627829,
            open_hours: "Tu-Su 09:30-18:00".to_owned(),
            url: Some("https://www.sherlock-holmes.co.uk/".to_owned()),
        };
        // upsert the place
        let res = server.put("/places").msgpack(&places).await;
        // We should get a success on the request
        assert_eq!(res.status_code(), StatusCode::OK);
        let _res_place: Place = res.msgpack();
        // The correct function should be called
        assert_eq!(mock_repository.update_place_count().await, 1);
        Ok(())
    }
}