use rocket::{
    catch, catchers,
    fairing::AdHoc,
    fs::FileServer,
    get,
    request::FlashMessage,
    response::{Flash, Redirect},
    routes, Build, Rocket, State,
};
use rocket_dyn_templates::{tera::Context, Template};
use serde::Deserialize;
use sqlx::SqlitePool;

use crate::model::{
    log::Log,
    tripdetails::TripDetails,
    triptype::TripType,
    user::User,
    usertrip::{UserTrip, UserTripError},
};

mod admin;
mod auth;
mod cox;
mod log;
mod misc;
mod stat;

#[get("/")]
async fn index(db: &State<SqlitePool>, user: User, flash: Option<FlashMessage<'_>>) -> Template {
    let mut context = Context::new();

    if user.is_cox || user.is_admin {
        let triptypes = TripType::all(db).await;
        context.insert("trip_types", &triptypes);
    }

    let days = user.get_days(db).await;

    if let Some(msg) = flash {
        context.insert("flash", &msg.into_inner());
    }
    context.insert("loggedin_user", &user);
    context.insert("days", &days);
    Template::render("index", context.into_json())
}

#[get("/join/<trip_details_id>")]
async fn join(db: &State<SqlitePool>, trip_details_id: i64, user: User) -> Flash<Redirect> {
    let Some(trip_details) = TripDetails::find_by_id(db, trip_details_id).await else { return Flash::error(Redirect::to("/"), "Trip_details do not exist.") };

    match UserTrip::create(db, &user, &trip_details).await {
        Ok(_) => {
            Log::create(
                db,
                format!(
                    "User {} registered for trip_details.id={}",
                    user.name, trip_details_id
                ),
            )
            .await;
            Flash::success(Redirect::to("/"), "Erfolgreich angemeldet!")
        }
        Err(UserTripError::EventAlreadyFull) => {
            Flash::error(Redirect::to("/"), "Event bereits ausgebucht!")
        }
        Err(UserTripError::AlreadyRegistered) => {
            Flash::error(Redirect::to("/"), "Du nimmst bereits teil!")
        }
        Err(UserTripError::AlreadyRegisteredAsCox) => {
            Flash::error(Redirect::to("/"), "Du hilfst bereits als Steuerperson aus!")
        }
        Err(UserTripError::CantRegisterAtOwnEvent) => Flash::error(
            Redirect::to("/"),
            "Du kannst bei einer selbst ausgeschriebenen Fahrt nicht mitrudern ;)",
        ),
        Err(UserTripError::GuestNotAllowedForThisEvent) => Flash::error(
            Redirect::to("/"),
            "Bei dieser Ausfahrt können leider keine Gäste mitfahren.",
        ),
    }
}

#[get("/remove/<trip_details_id>")]
async fn remove(db: &State<SqlitePool>, trip_details_id: i64, user: User) -> Flash<Redirect> {
    let Some(trip_details) = TripDetails::find_by_id(db, trip_details_id).await else {
             return Flash::error(Redirect::to("/"), "TripDetailsId does not exist");
         };

    UserTrip::delete(db, &user, &trip_details).await;

    Log::create(
        db,
        format!(
            "User {} unregistered for trip_details.id={}",
            user.name, trip_details_id
        ),
    )
    .await;

    Flash::success(Redirect::to("/"), "Erfolgreich abgemeldet!")
}

#[catch(401)] //unauthorized
fn unauthorized_error() -> Redirect {
    Redirect::to("/auth")
}

#[derive(Deserialize)]
#[serde(crate = "rocket::serde")]
pub struct Config {
    rss_key: String,
}

pub fn config(rocket: Rocket<Build>) -> Rocket<Build> {
    rocket
        .mount("/", routes![index, join, remove])
        .mount("/auth", auth::routes())
        .mount("/log", log::routes())
        .mount("/stat", stat::routes())
        .mount("/cox", cox::routes())
        .mount("/admin", admin::routes())
        .mount("/", misc::routes())
        .mount("/public", FileServer::from("static/"))
        .register("/", catchers![unauthorized_error])
        .attach(Template::fairing())
        .attach(AdHoc::config::<Config>())
}

#[cfg(test)]
mod test {
    use rocket::{
        http::{ContentType, Status},
        local::asynchronous::Client,
    };
    use sqlx::SqlitePool;

    use crate::testdb;

    #[sqlx::test]
    fn test_index() {
        let db = testdb!();

        let rocket = rocket::build().manage(db.clone());
        let rocket = crate::tera::config(rocket);

        let client = Client::tracked(rocket).await.unwrap();
        let login = client
            .post("/auth")
            .header(ContentType::Form) // Set the content type to form
            .body("name=cox&password=cox"); // Add the form data to the request body;
        login.dispatch().await;

        let req = client.get("/");
        let response = req.dispatch().await;

        assert_eq!(response.status(), Status::Ok);

        assert!(response.into_string().await.unwrap().contains("Ausfahrten"));
    }

    #[sqlx::test]
    fn test_without_login() {
        let db = testdb!();

        let rocket = rocket::build().manage(db.clone());
        let rocket = crate::tera::config(rocket);

        let client = Client::tracked(rocket).await.unwrap();

        let req = client.get("/");
        let response = req.dispatch().await;

        assert_eq!(response.status(), Status::SeeOther);
        assert_eq!(response.headers().get("Location").next(), Some("/auth"));
    }

    #[sqlx::test]
    fn test_join_and_remove() {
        let db = testdb!();

        let rocket = rocket::build().manage(db.clone());
        let rocket = crate::tera::config(rocket);

        let client = Client::tracked(rocket).await.unwrap();
        let login = client
            .post("/auth")
            .header(ContentType::Form) // Set the content type to form
            .body("name=rower&password=rower"); // Add the form data to the request body;
        login.dispatch().await;

        let req = client.get("/join/1");
        let response = req.dispatch().await;

        assert_eq!(response.status(), Status::SeeOther);
        assert_eq!(response.headers().get("Location").next(), Some("/"));

        let flash_cookie = response
            .cookies()
            .get("_flash")
            .expect("Expected flash cookie");

        assert_eq!(flash_cookie.value(), "7:successErfolgreich angemeldet!");

        let req = client.get("/remove/1");
        let response = req.dispatch().await;

        assert_eq!(response.status(), Status::SeeOther);
        assert_eq!(response.headers().get("Location").next(), Some("/"));

        let flash_cookie = response
            .cookies()
            .get("_flash")
            .expect("Expected flash cookie");

        assert_eq!(flash_cookie.value(), "7:successErfolgreich abgemeldet!");
    }

    #[sqlx::test]
    fn test_join_invalid_event() {
        let db = testdb!();

        let rocket = rocket::build().manage(db.clone());
        let rocket = crate::tera::config(rocket);

        let client = Client::tracked(rocket).await.unwrap();
        let login = client
            .post("/auth")
            .header(ContentType::Form) // Set the content type to form
            .body("name=rower&password=rower"); // Add the form data to the request body;
        login.dispatch().await;

        let req = client.get("/join/9999");
        let response = req.dispatch().await;

        assert_eq!(response.status(), Status::SeeOther);
        assert_eq!(response.headers().get("Location").next(), Some("/"));

        let flash_cookie = response
            .cookies()
            .get("_flash")
            .expect("Expected flash cookie");

        assert_eq!(flash_cookie.value(), "5:errorTrip_details do not exist.");
    }
}